Line data Source code
1 : /*-------------------------------------------------------------------------
2 : *
3 : * timestamp.c
4 : * Functions for the built-in SQL types "timestamp" and "interval".
5 : *
6 : * Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
7 : * Portions Copyright (c) 1994, Regents of the University of California
8 : *
9 : *
10 : * IDENTIFICATION
11 : * src/backend/utils/adt/timestamp.c
12 : *
13 : *-------------------------------------------------------------------------
14 : */
15 :
16 : #include "postgres.h"
17 :
18 : #include <ctype.h>
19 : #include <math.h>
20 : #include <limits.h>
21 : #include <sys/time.h>
22 :
23 : #include "access/xact.h"
24 : #include "catalog/pg_type.h"
25 : #include "common/int.h"
26 : #include "common/int128.h"
27 : #include "funcapi.h"
28 : #include "libpq/pqformat.h"
29 : #include "miscadmin.h"
30 : #include "nodes/nodeFuncs.h"
31 : #include "nodes/supportnodes.h"
32 : #include "optimizer/optimizer.h"
33 : #include "parser/scansup.h"
34 : #include "utils/array.h"
35 : #include "utils/builtins.h"
36 : #include "utils/date.h"
37 : #include "utils/datetime.h"
38 : #include "utils/float.h"
39 : #include "utils/numeric.h"
40 : #include "utils/sortsupport.h"
41 :
42 : /*
43 : * gcc's -ffast-math switch breaks routines that expect exact results from
44 : * expressions like timeval / SECS_PER_HOUR, where timeval is double.
45 : */
46 : #ifdef __FAST_MATH__
47 : #error -ffast-math is known to break this code
48 : #endif
49 :
50 : #define SAMESIGN(a,b) (((a) < 0) == ((b) < 0))
51 :
52 : /* Set at postmaster start */
53 : TimestampTz PgStartTime;
54 :
55 : /* Set at configuration reload */
56 : TimestampTz PgReloadTime;
57 :
58 : typedef struct
59 : {
60 : Timestamp current;
61 : Timestamp finish;
62 : Interval step;
63 : int step_sign;
64 : } generate_series_timestamp_fctx;
65 :
66 : typedef struct
67 : {
68 : TimestampTz current;
69 : TimestampTz finish;
70 : Interval step;
71 : int step_sign;
72 : pg_tz *attimezone;
73 : } generate_series_timestamptz_fctx;
74 :
75 : /*
76 : * The transition datatype for interval aggregates is declared as internal.
77 : * It's a pointer to an IntervalAggState allocated in the aggregate context.
78 : */
79 : typedef struct IntervalAggState
80 : {
81 : int64 N; /* count of finite intervals processed */
82 : Interval sumX; /* sum of finite intervals processed */
83 : /* These counts are *not* included in N! Use IA_TOTAL_COUNT() as needed */
84 : int64 pInfcount; /* count of +infinity intervals */
85 : int64 nInfcount; /* count of -infinity intervals */
86 : } IntervalAggState;
87 :
88 : #define IA_TOTAL_COUNT(ia) \
89 : ((ia)->N + (ia)->pInfcount + (ia)->nInfcount)
90 :
91 : static TimeOffset time2t(const int hour, const int min, const int sec, const fsec_t fsec);
92 : static Timestamp dt2local(Timestamp dt, int timezone);
93 : static bool AdjustIntervalForTypmod(Interval *interval, int32 typmod,
94 : Node *escontext);
95 : static TimestampTz timestamp2timestamptz(Timestamp timestamp);
96 : static Timestamp timestamptz2timestamp(TimestampTz timestamp);
97 :
98 : static void EncodeSpecialInterval(const Interval *interval, char *str);
99 : static void interval_um_internal(const Interval *interval, Interval *result);
100 :
101 : /* common code for timestamptypmodin and timestamptztypmodin */
102 : static int32
103 144 : anytimestamp_typmodin(bool istz, ArrayType *ta)
104 : {
105 : int32 *tl;
106 : int n;
107 :
108 144 : tl = ArrayGetIntegerTypmods(ta, &n);
109 :
110 : /*
111 : * we're not too tense about good error message here because grammar
112 : * shouldn't allow wrong number of modifiers for TIMESTAMP
113 : */
114 144 : if (n != 1)
115 0 : ereport(ERROR,
116 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
117 : errmsg("invalid type modifier")));
118 :
119 144 : return anytimestamp_typmod_check(istz, tl[0]);
120 : }
121 :
122 : /* exported so parse_expr.c can use it */
123 : int32
124 656 : anytimestamp_typmod_check(bool istz, int32 typmod)
125 : {
126 656 : if (typmod < 0)
127 0 : ereport(ERROR,
128 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
129 : errmsg("TIMESTAMP(%d)%s precision must not be negative",
130 : typmod, (istz ? " WITH TIME ZONE" : ""))));
131 656 : if (typmod > MAX_TIMESTAMP_PRECISION)
132 : {
133 36 : ereport(WARNING,
134 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
135 : errmsg("TIMESTAMP(%d)%s precision reduced to maximum allowed, %d",
136 : typmod, (istz ? " WITH TIME ZONE" : ""),
137 : MAX_TIMESTAMP_PRECISION)));
138 36 : typmod = MAX_TIMESTAMP_PRECISION;
139 : }
140 :
141 656 : return typmod;
142 : }
143 :
144 : /* common code for timestamptypmodout and timestamptztypmodout */
145 : static char *
146 20 : anytimestamp_typmodout(bool istz, int32 typmod)
147 : {
148 20 : const char *tz = istz ? " with time zone" : " without time zone";
149 :
150 20 : if (typmod >= 0)
151 20 : return psprintf("(%d)%s", (int) typmod, tz);
152 : else
153 0 : return pstrdup(tz);
154 : }
155 :
156 :
157 : /*****************************************************************************
158 : * USER I/O ROUTINES *
159 : *****************************************************************************/
160 :
161 : /* timestamp_in()
162 : * Convert a string to internal form.
163 : */
164 : Datum
165 17420 : timestamp_in(PG_FUNCTION_ARGS)
166 : {
167 17420 : char *str = PG_GETARG_CSTRING(0);
168 : #ifdef NOT_USED
169 : Oid typelem = PG_GETARG_OID(1);
170 : #endif
171 17420 : int32 typmod = PG_GETARG_INT32(2);
172 17420 : Node *escontext = fcinfo->context;
173 : Timestamp result;
174 : fsec_t fsec;
175 : struct pg_tm tt,
176 17420 : *tm = &tt;
177 : int tz;
178 : int dtype;
179 : int nf;
180 : int dterr;
181 : char *field[MAXDATEFIELDS];
182 : int ftype[MAXDATEFIELDS];
183 : char workbuf[MAXDATELEN + MAXDATEFIELDS];
184 : DateTimeErrorExtra extra;
185 :
186 17420 : dterr = ParseDateTime(str, workbuf, sizeof(workbuf),
187 : field, ftype, MAXDATEFIELDS, &nf);
188 17420 : if (dterr == 0)
189 17420 : dterr = DecodeDateTime(field, ftype, nf,
190 : &dtype, tm, &fsec, &tz, &extra);
191 17420 : if (dterr != 0)
192 : {
193 114 : DateTimeParseError(dterr, &extra, str, "timestamp", escontext);
194 24 : PG_RETURN_NULL();
195 : }
196 :
197 17306 : switch (dtype)
198 : {
199 16964 : case DTK_DATE:
200 16964 : if (tm2timestamp(tm, fsec, NULL, &result) != 0)
201 18 : ereturn(escontext, (Datum) 0,
202 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
203 : errmsg("timestamp out of range: \"%s\"", str)));
204 16946 : break;
205 :
206 24 : case DTK_EPOCH:
207 24 : result = SetEpochTimestamp();
208 24 : break;
209 :
210 182 : case DTK_LATE:
211 182 : TIMESTAMP_NOEND(result);
212 182 : break;
213 :
214 136 : case DTK_EARLY:
215 136 : TIMESTAMP_NOBEGIN(result);
216 136 : break;
217 :
218 0 : default:
219 0 : elog(ERROR, "unexpected dtype %d while parsing timestamp \"%s\"",
220 : dtype, str);
221 : TIMESTAMP_NOEND(result);
222 : }
223 :
224 17288 : AdjustTimestampForTypmod(&result, typmod, escontext);
225 :
226 17288 : PG_RETURN_TIMESTAMP(result);
227 : }
228 :
229 : /* timestamp_out()
230 : * Convert a timestamp to external form.
231 : */
232 : Datum
233 42098 : timestamp_out(PG_FUNCTION_ARGS)
234 : {
235 42098 : Timestamp timestamp = PG_GETARG_TIMESTAMP(0);
236 : char *result;
237 : struct pg_tm tt,
238 42098 : *tm = &tt;
239 : fsec_t fsec;
240 : char buf[MAXDATELEN + 1];
241 :
242 42098 : if (TIMESTAMP_NOT_FINITE(timestamp))
243 472 : EncodeSpecialTimestamp(timestamp, buf);
244 41626 : else if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL, NULL) == 0)
245 41626 : EncodeDateTime(tm, fsec, false, 0, NULL, DateStyle, buf);
246 : else
247 0 : ereport(ERROR,
248 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
249 : errmsg("timestamp out of range")));
250 :
251 42098 : result = pstrdup(buf);
252 42098 : PG_RETURN_CSTRING(result);
253 : }
254 :
255 : /*
256 : * timestamp_recv - converts external binary format to timestamp
257 : */
258 : Datum
259 0 : timestamp_recv(PG_FUNCTION_ARGS)
260 : {
261 0 : StringInfo buf = (StringInfo) PG_GETARG_POINTER(0);
262 :
263 : #ifdef NOT_USED
264 : Oid typelem = PG_GETARG_OID(1);
265 : #endif
266 0 : int32 typmod = PG_GETARG_INT32(2);
267 : Timestamp timestamp;
268 : struct pg_tm tt,
269 0 : *tm = &tt;
270 : fsec_t fsec;
271 :
272 0 : timestamp = (Timestamp) pq_getmsgint64(buf);
273 :
274 : /* range check: see if timestamp_out would like it */
275 0 : if (TIMESTAMP_NOT_FINITE(timestamp))
276 : /* ok */ ;
277 0 : else if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL, NULL) != 0 ||
278 0 : !IS_VALID_TIMESTAMP(timestamp))
279 0 : ereport(ERROR,
280 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
281 : errmsg("timestamp out of range")));
282 :
283 0 : AdjustTimestampForTypmod(×tamp, typmod, NULL);
284 :
285 0 : PG_RETURN_TIMESTAMP(timestamp);
286 : }
287 :
288 : /*
289 : * timestamp_send - converts timestamp to binary format
290 : */
291 : Datum
292 0 : timestamp_send(PG_FUNCTION_ARGS)
293 : {
294 0 : Timestamp timestamp = PG_GETARG_TIMESTAMP(0);
295 : StringInfoData buf;
296 :
297 0 : pq_begintypsend(&buf);
298 0 : pq_sendint64(&buf, timestamp);
299 0 : PG_RETURN_BYTEA_P(pq_endtypsend(&buf));
300 : }
301 :
302 : Datum
303 36 : timestamptypmodin(PG_FUNCTION_ARGS)
304 : {
305 36 : ArrayType *ta = PG_GETARG_ARRAYTYPE_P(0);
306 :
307 36 : PG_RETURN_INT32(anytimestamp_typmodin(false, ta));
308 : }
309 :
310 : Datum
311 10 : timestamptypmodout(PG_FUNCTION_ARGS)
312 : {
313 10 : int32 typmod = PG_GETARG_INT32(0);
314 :
315 10 : PG_RETURN_CSTRING(anytimestamp_typmodout(false, typmod));
316 : }
317 :
318 :
319 : /*
320 : * timestamp_support()
321 : *
322 : * Planner support function for the timestamp_scale() and timestamptz_scale()
323 : * length coercion functions (we need not distinguish them here).
324 : */
325 : Datum
326 24 : timestamp_support(PG_FUNCTION_ARGS)
327 : {
328 24 : Node *rawreq = (Node *) PG_GETARG_POINTER(0);
329 24 : Node *ret = NULL;
330 :
331 24 : if (IsA(rawreq, SupportRequestSimplify))
332 : {
333 12 : SupportRequestSimplify *req = (SupportRequestSimplify *) rawreq;
334 :
335 12 : ret = TemporalSimplify(MAX_TIMESTAMP_PRECISION, (Node *) req->fcall);
336 : }
337 :
338 24 : PG_RETURN_POINTER(ret);
339 : }
340 :
341 : /* timestamp_scale()
342 : * Adjust time type for specified scale factor.
343 : * Used by PostgreSQL type system to stuff columns.
344 : */
345 : Datum
346 62172 : timestamp_scale(PG_FUNCTION_ARGS)
347 : {
348 62172 : Timestamp timestamp = PG_GETARG_TIMESTAMP(0);
349 62172 : int32 typmod = PG_GETARG_INT32(1);
350 : Timestamp result;
351 :
352 62172 : result = timestamp;
353 :
354 62172 : AdjustTimestampForTypmod(&result, typmod, NULL);
355 :
356 62172 : PG_RETURN_TIMESTAMP(result);
357 : }
358 :
359 : /*
360 : * AdjustTimestampForTypmod --- round off a timestamp to suit given typmod
361 : * Works for either timestamp or timestamptz.
362 : *
363 : * Returns true on success, false on failure (if escontext points to an
364 : * ErrorSaveContext; otherwise errors are thrown).
365 : */
366 : bool
367 125286 : AdjustTimestampForTypmod(Timestamp *time, int32 typmod, Node *escontext)
368 : {
369 : static const int64 TimestampScales[MAX_TIMESTAMP_PRECISION + 1] = {
370 : INT64CONST(1000000),
371 : INT64CONST(100000),
372 : INT64CONST(10000),
373 : INT64CONST(1000),
374 : INT64CONST(100),
375 : INT64CONST(10),
376 : INT64CONST(1)
377 : };
378 :
379 : static const int64 TimestampOffsets[MAX_TIMESTAMP_PRECISION + 1] = {
380 : INT64CONST(500000),
381 : INT64CONST(50000),
382 : INT64CONST(5000),
383 : INT64CONST(500),
384 : INT64CONST(50),
385 : INT64CONST(5),
386 : INT64CONST(0)
387 : };
388 :
389 125286 : if (!TIMESTAMP_NOT_FINITE(*time)
390 124598 : && (typmod != -1) && (typmod != MAX_TIMESTAMP_PRECISION))
391 : {
392 63170 : if (typmod < 0 || typmod > MAX_TIMESTAMP_PRECISION)
393 0 : ereturn(escontext, false,
394 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
395 : errmsg("timestamp(%d) precision must be between %d and %d",
396 : typmod, 0, MAX_TIMESTAMP_PRECISION)));
397 :
398 63170 : if (*time >= INT64CONST(0))
399 : {
400 62528 : *time = ((*time + TimestampOffsets[typmod]) / TimestampScales[typmod]) *
401 62528 : TimestampScales[typmod];
402 : }
403 : else
404 : {
405 642 : *time = -((((-*time) + TimestampOffsets[typmod]) / TimestampScales[typmod])
406 642 : * TimestampScales[typmod]);
407 : }
408 : }
409 :
410 125286 : return true;
411 : }
412 :
413 : /* timestamptz_in()
414 : * Convert a string to internal form.
415 : */
416 : Datum
417 41110 : timestamptz_in(PG_FUNCTION_ARGS)
418 : {
419 41110 : char *str = PG_GETARG_CSTRING(0);
420 : #ifdef NOT_USED
421 : Oid typelem = PG_GETARG_OID(1);
422 : #endif
423 41110 : int32 typmod = PG_GETARG_INT32(2);
424 41110 : Node *escontext = fcinfo->context;
425 : TimestampTz result;
426 : fsec_t fsec;
427 : struct pg_tm tt,
428 41110 : *tm = &tt;
429 : int tz;
430 : int dtype;
431 : int nf;
432 : int dterr;
433 : char *field[MAXDATEFIELDS];
434 : int ftype[MAXDATEFIELDS];
435 : char workbuf[MAXDATELEN + MAXDATEFIELDS];
436 : DateTimeErrorExtra extra;
437 :
438 41110 : dterr = ParseDateTime(str, workbuf, sizeof(workbuf),
439 : field, ftype, MAXDATEFIELDS, &nf);
440 41110 : if (dterr == 0)
441 41110 : dterr = DecodeDateTime(field, ftype, nf,
442 : &dtype, tm, &fsec, &tz, &extra);
443 41110 : if (dterr != 0)
444 : {
445 114 : DateTimeParseError(dterr, &extra, str, "timestamp with time zone",
446 : escontext);
447 24 : PG_RETURN_NULL();
448 : }
449 :
450 40996 : switch (dtype)
451 : {
452 40638 : case DTK_DATE:
453 40638 : if (tm2timestamp(tm, fsec, &tz, &result) != 0)
454 24 : ereturn(escontext, (Datum) 0,
455 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
456 : errmsg("timestamp out of range: \"%s\"", str)));
457 40614 : break;
458 :
459 12 : case DTK_EPOCH:
460 12 : result = SetEpochTimestamp();
461 12 : break;
462 :
463 204 : case DTK_LATE:
464 204 : TIMESTAMP_NOEND(result);
465 204 : break;
466 :
467 142 : case DTK_EARLY:
468 142 : TIMESTAMP_NOBEGIN(result);
469 142 : break;
470 :
471 0 : default:
472 0 : elog(ERROR, "unexpected dtype %d while parsing timestamptz \"%s\"",
473 : dtype, str);
474 : TIMESTAMP_NOEND(result);
475 : }
476 :
477 40972 : AdjustTimestampForTypmod(&result, typmod, escontext);
478 :
479 40972 : PG_RETURN_TIMESTAMPTZ(result);
480 : }
481 :
482 : /*
483 : * Try to parse a timezone specification, and return its timezone offset value
484 : * if it's acceptable. Otherwise, an error is thrown.
485 : *
486 : * Note: some code paths update tm->tm_isdst, and some don't; current callers
487 : * don't care, so we don't bother being consistent.
488 : */
489 : static int
490 192 : parse_sane_timezone(struct pg_tm *tm, text *zone)
491 : {
492 : char tzname[TZ_STRLEN_MAX + 1];
493 : int dterr;
494 : int tz;
495 :
496 192 : text_to_cstring_buffer(zone, tzname, sizeof(tzname));
497 :
498 : /*
499 : * Look up the requested timezone. First we try to interpret it as a
500 : * numeric timezone specification; if DecodeTimezone decides it doesn't
501 : * like the format, we try timezone abbreviations and names.
502 : *
503 : * Note pg_tzset happily parses numeric input that DecodeTimezone would
504 : * reject. To avoid having it accept input that would otherwise be seen
505 : * as invalid, it's enough to disallow having a digit in the first
506 : * position of our input string.
507 : */
508 192 : if (isdigit((unsigned char) *tzname))
509 6 : ereport(ERROR,
510 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
511 : errmsg("invalid input syntax for type %s: \"%s\"",
512 : "numeric time zone", tzname),
513 : errhint("Numeric time zones must have \"-\" or \"+\" as first character.")));
514 :
515 186 : dterr = DecodeTimezone(tzname, &tz);
516 186 : if (dterr != 0)
517 : {
518 : int type,
519 : val;
520 : pg_tz *tzp;
521 :
522 78 : if (dterr == DTERR_TZDISP_OVERFLOW)
523 12 : ereport(ERROR,
524 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
525 : errmsg("numeric time zone \"%s\" out of range", tzname)));
526 66 : else if (dterr != DTERR_BAD_FORMAT)
527 0 : ereport(ERROR,
528 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
529 : errmsg("time zone \"%s\" not recognized", tzname)));
530 :
531 66 : type = DecodeTimezoneName(tzname, &val, &tzp);
532 :
533 60 : if (type == TZNAME_FIXED_OFFSET)
534 : {
535 : /* fixed-offset abbreviation */
536 12 : tz = -val;
537 : }
538 48 : else if (type == TZNAME_DYNTZ)
539 : {
540 : /* dynamic-offset abbreviation, resolve using specified time */
541 12 : tz = DetermineTimeZoneAbbrevOffset(tm, tzname, tzp);
542 : }
543 : else
544 : {
545 : /* full zone name */
546 36 : tz = DetermineTimeZoneOffset(tm, tzp);
547 : }
548 : }
549 :
550 168 : return tz;
551 : }
552 :
553 : /*
554 : * Look up the requested timezone, returning a pg_tz struct.
555 : *
556 : * This is the same as DecodeTimezoneNameToTz, but starting with a text Datum.
557 : */
558 : static pg_tz *
559 84 : lookup_timezone(text *zone)
560 : {
561 : char tzname[TZ_STRLEN_MAX + 1];
562 :
563 84 : text_to_cstring_buffer(zone, tzname, sizeof(tzname));
564 :
565 84 : return DecodeTimezoneNameToTz(tzname);
566 : }
567 :
568 : /*
569 : * make_timestamp_internal
570 : * workhorse for make_timestamp and make_timestamptz
571 : */
572 : static Timestamp
573 228 : make_timestamp_internal(int year, int month, int day,
574 : int hour, int min, double sec)
575 : {
576 : struct pg_tm tm;
577 : TimeOffset date;
578 : TimeOffset time;
579 : int dterr;
580 228 : bool bc = false;
581 : Timestamp result;
582 :
583 228 : tm.tm_year = year;
584 228 : tm.tm_mon = month;
585 228 : tm.tm_mday = day;
586 :
587 : /* Handle negative years as BC */
588 228 : if (tm.tm_year < 0)
589 : {
590 6 : bc = true;
591 6 : tm.tm_year = -tm.tm_year;
592 : }
593 :
594 228 : dterr = ValidateDate(DTK_DATE_M, false, false, bc, &tm);
595 :
596 228 : if (dterr != 0)
597 6 : ereport(ERROR,
598 : (errcode(ERRCODE_DATETIME_FIELD_OVERFLOW),
599 : errmsg("date field value out of range: %d-%02d-%02d",
600 : year, month, day)));
601 :
602 222 : if (!IS_VALID_JULIAN(tm.tm_year, tm.tm_mon, tm.tm_mday))
603 0 : ereport(ERROR,
604 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
605 : errmsg("date out of range: %d-%02d-%02d",
606 : year, month, day)));
607 :
608 222 : date = date2j(tm.tm_year, tm.tm_mon, tm.tm_mday) - POSTGRES_EPOCH_JDATE;
609 :
610 : /* Check for time overflow */
611 222 : if (float_time_overflows(hour, min, sec))
612 0 : ereport(ERROR,
613 : (errcode(ERRCODE_DATETIME_FIELD_OVERFLOW),
614 : errmsg("time field value out of range: %d:%02d:%02g",
615 : hour, min, sec)));
616 :
617 : /* This should match tm2time */
618 222 : time = (((hour * MINS_PER_HOUR + min) * SECS_PER_MINUTE)
619 222 : * USECS_PER_SEC) + (int64) rint(sec * USECS_PER_SEC);
620 :
621 222 : if (unlikely(pg_mul_s64_overflow(date, USECS_PER_DAY, &result) ||
622 : pg_add_s64_overflow(result, time, &result)))
623 0 : ereport(ERROR,
624 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
625 : errmsg("timestamp out of range: %d-%02d-%02d %d:%02d:%02g",
626 : year, month, day,
627 : hour, min, sec)));
628 :
629 : /* final range check catches just-out-of-range timestamps */
630 222 : if (!IS_VALID_TIMESTAMP(result))
631 0 : ereport(ERROR,
632 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
633 : errmsg("timestamp out of range: %d-%02d-%02d %d:%02d:%02g",
634 : year, month, day,
635 : hour, min, sec)));
636 :
637 222 : return result;
638 : }
639 :
640 : /*
641 : * make_timestamp() - timestamp constructor
642 : */
643 : Datum
644 24 : make_timestamp(PG_FUNCTION_ARGS)
645 : {
646 24 : int32 year = PG_GETARG_INT32(0);
647 24 : int32 month = PG_GETARG_INT32(1);
648 24 : int32 mday = PG_GETARG_INT32(2);
649 24 : int32 hour = PG_GETARG_INT32(3);
650 24 : int32 min = PG_GETARG_INT32(4);
651 24 : float8 sec = PG_GETARG_FLOAT8(5);
652 : Timestamp result;
653 :
654 24 : result = make_timestamp_internal(year, month, mday,
655 : hour, min, sec);
656 :
657 18 : PG_RETURN_TIMESTAMP(result);
658 : }
659 :
660 : /*
661 : * make_timestamptz() - timestamp with time zone constructor
662 : */
663 : Datum
664 12 : make_timestamptz(PG_FUNCTION_ARGS)
665 : {
666 12 : int32 year = PG_GETARG_INT32(0);
667 12 : int32 month = PG_GETARG_INT32(1);
668 12 : int32 mday = PG_GETARG_INT32(2);
669 12 : int32 hour = PG_GETARG_INT32(3);
670 12 : int32 min = PG_GETARG_INT32(4);
671 12 : float8 sec = PG_GETARG_FLOAT8(5);
672 : Timestamp result;
673 :
674 12 : result = make_timestamp_internal(year, month, mday,
675 : hour, min, sec);
676 :
677 12 : PG_RETURN_TIMESTAMPTZ(timestamp2timestamptz(result));
678 : }
679 :
680 : /*
681 : * Construct a timestamp with time zone.
682 : * As above, but the time zone is specified as seventh argument.
683 : */
684 : Datum
685 192 : make_timestamptz_at_timezone(PG_FUNCTION_ARGS)
686 : {
687 192 : int32 year = PG_GETARG_INT32(0);
688 192 : int32 month = PG_GETARG_INT32(1);
689 192 : int32 mday = PG_GETARG_INT32(2);
690 192 : int32 hour = PG_GETARG_INT32(3);
691 192 : int32 min = PG_GETARG_INT32(4);
692 192 : float8 sec = PG_GETARG_FLOAT8(5);
693 192 : text *zone = PG_GETARG_TEXT_PP(6);
694 : TimestampTz result;
695 : Timestamp timestamp;
696 : struct pg_tm tt;
697 : int tz;
698 : fsec_t fsec;
699 :
700 192 : timestamp = make_timestamp_internal(year, month, mday,
701 : hour, min, sec);
702 :
703 192 : if (timestamp2tm(timestamp, NULL, &tt, &fsec, NULL, NULL) != 0)
704 0 : ereport(ERROR,
705 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
706 : errmsg("timestamp out of range")));
707 :
708 192 : tz = parse_sane_timezone(&tt, zone);
709 :
710 168 : result = dt2local(timestamp, -tz);
711 :
712 168 : if (!IS_VALID_TIMESTAMP(result))
713 0 : ereport(ERROR,
714 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
715 : errmsg("timestamp out of range")));
716 :
717 168 : PG_RETURN_TIMESTAMPTZ(result);
718 : }
719 :
720 : /*
721 : * to_timestamp(double precision)
722 : * Convert UNIX epoch to timestamptz.
723 : */
724 : Datum
725 54 : float8_timestamptz(PG_FUNCTION_ARGS)
726 : {
727 54 : float8 seconds = PG_GETARG_FLOAT8(0);
728 : TimestampTz result;
729 :
730 : /* Deal with NaN and infinite inputs ... */
731 54 : if (isnan(seconds))
732 6 : ereport(ERROR,
733 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
734 : errmsg("timestamp cannot be NaN")));
735 :
736 48 : if (isinf(seconds))
737 : {
738 12 : if (seconds < 0)
739 6 : TIMESTAMP_NOBEGIN(result);
740 : else
741 6 : TIMESTAMP_NOEND(result);
742 : }
743 : else
744 : {
745 : /* Out of range? */
746 36 : if (seconds <
747 : (float8) SECS_PER_DAY * (DATETIME_MIN_JULIAN - UNIX_EPOCH_JDATE)
748 36 : || seconds >=
749 : (float8) SECS_PER_DAY * (TIMESTAMP_END_JULIAN - UNIX_EPOCH_JDATE))
750 0 : ereport(ERROR,
751 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
752 : errmsg("timestamp out of range: \"%g\"", seconds)));
753 :
754 : /* Convert UNIX epoch to Postgres epoch */
755 36 : seconds -= ((POSTGRES_EPOCH_JDATE - UNIX_EPOCH_JDATE) * SECS_PER_DAY);
756 :
757 36 : seconds = rint(seconds * USECS_PER_SEC);
758 36 : result = (int64) seconds;
759 :
760 : /* Recheck in case roundoff produces something just out of range */
761 36 : if (!IS_VALID_TIMESTAMP(result))
762 0 : ereport(ERROR,
763 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
764 : errmsg("timestamp out of range: \"%g\"",
765 : PG_GETARG_FLOAT8(0))));
766 : }
767 :
768 48 : PG_RETURN_TIMESTAMP(result);
769 : }
770 :
771 : /* timestamptz_out()
772 : * Convert a timestamp to external form.
773 : */
774 : Datum
775 69698 : timestamptz_out(PG_FUNCTION_ARGS)
776 : {
777 69698 : TimestampTz dt = PG_GETARG_TIMESTAMPTZ(0);
778 : char *result;
779 : int tz;
780 : struct pg_tm tt,
781 69698 : *tm = &tt;
782 : fsec_t fsec;
783 : const char *tzn;
784 : char buf[MAXDATELEN + 1];
785 :
786 69698 : if (TIMESTAMP_NOT_FINITE(dt))
787 728 : EncodeSpecialTimestamp(dt, buf);
788 68970 : else if (timestamp2tm(dt, &tz, tm, &fsec, &tzn, NULL) == 0)
789 68970 : EncodeDateTime(tm, fsec, true, tz, tzn, DateStyle, buf);
790 : else
791 0 : ereport(ERROR,
792 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
793 : errmsg("timestamp out of range")));
794 :
795 69698 : result = pstrdup(buf);
796 69698 : PG_RETURN_CSTRING(result);
797 : }
798 :
799 : /*
800 : * timestamptz_recv - converts external binary format to timestamptz
801 : */
802 : Datum
803 0 : timestamptz_recv(PG_FUNCTION_ARGS)
804 : {
805 0 : StringInfo buf = (StringInfo) PG_GETARG_POINTER(0);
806 :
807 : #ifdef NOT_USED
808 : Oid typelem = PG_GETARG_OID(1);
809 : #endif
810 0 : int32 typmod = PG_GETARG_INT32(2);
811 : TimestampTz timestamp;
812 : int tz;
813 : struct pg_tm tt,
814 0 : *tm = &tt;
815 : fsec_t fsec;
816 :
817 0 : timestamp = (TimestampTz) pq_getmsgint64(buf);
818 :
819 : /* range check: see if timestamptz_out would like it */
820 0 : if (TIMESTAMP_NOT_FINITE(timestamp))
821 : /* ok */ ;
822 0 : else if (timestamp2tm(timestamp, &tz, tm, &fsec, NULL, NULL) != 0 ||
823 0 : !IS_VALID_TIMESTAMP(timestamp))
824 0 : ereport(ERROR,
825 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
826 : errmsg("timestamp out of range")));
827 :
828 0 : AdjustTimestampForTypmod(×tamp, typmod, NULL);
829 :
830 0 : PG_RETURN_TIMESTAMPTZ(timestamp);
831 : }
832 :
833 : /*
834 : * timestamptz_send - converts timestamptz to binary format
835 : */
836 : Datum
837 0 : timestamptz_send(PG_FUNCTION_ARGS)
838 : {
839 0 : TimestampTz timestamp = PG_GETARG_TIMESTAMPTZ(0);
840 : StringInfoData buf;
841 :
842 0 : pq_begintypsend(&buf);
843 0 : pq_sendint64(&buf, timestamp);
844 0 : PG_RETURN_BYTEA_P(pq_endtypsend(&buf));
845 : }
846 :
847 : Datum
848 108 : timestamptztypmodin(PG_FUNCTION_ARGS)
849 : {
850 108 : ArrayType *ta = PG_GETARG_ARRAYTYPE_P(0);
851 :
852 108 : PG_RETURN_INT32(anytimestamp_typmodin(true, ta));
853 : }
854 :
855 : Datum
856 10 : timestamptztypmodout(PG_FUNCTION_ARGS)
857 : {
858 10 : int32 typmod = PG_GETARG_INT32(0);
859 :
860 10 : PG_RETURN_CSTRING(anytimestamp_typmodout(true, typmod));
861 : }
862 :
863 :
864 : /* timestamptz_scale()
865 : * Adjust time type for specified scale factor.
866 : * Used by PostgreSQL type system to stuff columns.
867 : */
868 : Datum
869 456 : timestamptz_scale(PG_FUNCTION_ARGS)
870 : {
871 456 : TimestampTz timestamp = PG_GETARG_TIMESTAMPTZ(0);
872 456 : int32 typmod = PG_GETARG_INT32(1);
873 : TimestampTz result;
874 :
875 456 : result = timestamp;
876 :
877 456 : AdjustTimestampForTypmod(&result, typmod, NULL);
878 :
879 456 : PG_RETURN_TIMESTAMPTZ(result);
880 : }
881 :
882 :
883 : /* interval_in()
884 : * Convert a string to internal form.
885 : *
886 : * External format(s):
887 : * Uses the generic date/time parsing and decoding routines.
888 : */
889 : Datum
890 11826 : interval_in(PG_FUNCTION_ARGS)
891 : {
892 11826 : char *str = PG_GETARG_CSTRING(0);
893 : #ifdef NOT_USED
894 : Oid typelem = PG_GETARG_OID(1);
895 : #endif
896 11826 : int32 typmod = PG_GETARG_INT32(2);
897 11826 : Node *escontext = fcinfo->context;
898 : Interval *result;
899 : struct pg_itm_in tt,
900 11826 : *itm_in = &tt;
901 : int dtype;
902 : int nf;
903 : int range;
904 : int dterr;
905 : char *field[MAXDATEFIELDS];
906 : int ftype[MAXDATEFIELDS];
907 : char workbuf[256];
908 : DateTimeErrorExtra extra;
909 :
910 11826 : itm_in->tm_year = 0;
911 11826 : itm_in->tm_mon = 0;
912 11826 : itm_in->tm_mday = 0;
913 11826 : itm_in->tm_usec = 0;
914 :
915 11826 : if (typmod >= 0)
916 336 : range = INTERVAL_RANGE(typmod);
917 : else
918 11490 : range = INTERVAL_FULL_RANGE;
919 :
920 11826 : dterr = ParseDateTime(str, workbuf, sizeof(workbuf), field,
921 : ftype, MAXDATEFIELDS, &nf);
922 11826 : if (dterr == 0)
923 11826 : dterr = DecodeInterval(field, ftype, nf, range,
924 : &dtype, itm_in);
925 :
926 : /* if those functions think it's a bad format, try ISO8601 style */
927 11826 : if (dterr == DTERR_BAD_FORMAT)
928 612 : dterr = DecodeISO8601Interval(str,
929 : &dtype, itm_in);
930 :
931 11826 : if (dterr != 0)
932 : {
933 954 : if (dterr == DTERR_FIELD_OVERFLOW)
934 720 : dterr = DTERR_INTERVAL_OVERFLOW;
935 954 : DateTimeParseError(dterr, &extra, str, "interval", escontext);
936 24 : PG_RETURN_NULL();
937 : }
938 :
939 10872 : result = (Interval *) palloc(sizeof(Interval));
940 :
941 10872 : switch (dtype)
942 : {
943 9900 : case DTK_DELTA:
944 9900 : if (itmin2interval(itm_in, result) != 0)
945 18 : ereturn(escontext, (Datum) 0,
946 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
947 : errmsg("interval out of range")));
948 9882 : break;
949 :
950 570 : case DTK_LATE:
951 570 : INTERVAL_NOEND(result);
952 570 : break;
953 :
954 402 : case DTK_EARLY:
955 402 : INTERVAL_NOBEGIN(result);
956 402 : break;
957 :
958 0 : default:
959 0 : elog(ERROR, "unexpected dtype %d while parsing interval \"%s\"",
960 : dtype, str);
961 : }
962 :
963 10854 : AdjustIntervalForTypmod(result, typmod, escontext);
964 :
965 10842 : PG_RETURN_INTERVAL_P(result);
966 : }
967 :
968 : /* interval_out()
969 : * Convert a time span to external form.
970 : */
971 : Datum
972 15514 : interval_out(PG_FUNCTION_ARGS)
973 : {
974 15514 : Interval *span = PG_GETARG_INTERVAL_P(0);
975 : char *result;
976 : struct pg_itm tt,
977 15514 : *itm = &tt;
978 : char buf[MAXDATELEN + 1];
979 :
980 15514 : if (INTERVAL_NOT_FINITE(span))
981 2024 : EncodeSpecialInterval(span, buf);
982 : else
983 : {
984 13490 : interval2itm(*span, itm);
985 13490 : EncodeInterval(itm, IntervalStyle, buf);
986 : }
987 :
988 15514 : result = pstrdup(buf);
989 15514 : PG_RETURN_CSTRING(result);
990 : }
991 :
992 : /*
993 : * interval_recv - converts external binary format to interval
994 : */
995 : Datum
996 0 : interval_recv(PG_FUNCTION_ARGS)
997 : {
998 0 : StringInfo buf = (StringInfo) PG_GETARG_POINTER(0);
999 :
1000 : #ifdef NOT_USED
1001 : Oid typelem = PG_GETARG_OID(1);
1002 : #endif
1003 0 : int32 typmod = PG_GETARG_INT32(2);
1004 : Interval *interval;
1005 :
1006 0 : interval = (Interval *) palloc(sizeof(Interval));
1007 :
1008 0 : interval->time = pq_getmsgint64(buf);
1009 0 : interval->day = pq_getmsgint(buf, sizeof(interval->day));
1010 0 : interval->month = pq_getmsgint(buf, sizeof(interval->month));
1011 :
1012 0 : AdjustIntervalForTypmod(interval, typmod, NULL);
1013 :
1014 0 : PG_RETURN_INTERVAL_P(interval);
1015 : }
1016 :
1017 : /*
1018 : * interval_send - converts interval to binary format
1019 : */
1020 : Datum
1021 0 : interval_send(PG_FUNCTION_ARGS)
1022 : {
1023 0 : Interval *interval = PG_GETARG_INTERVAL_P(0);
1024 : StringInfoData buf;
1025 :
1026 0 : pq_begintypsend(&buf);
1027 0 : pq_sendint64(&buf, interval->time);
1028 0 : pq_sendint32(&buf, interval->day);
1029 0 : pq_sendint32(&buf, interval->month);
1030 0 : PG_RETURN_BYTEA_P(pq_endtypsend(&buf));
1031 : }
1032 :
1033 : /*
1034 : * The interval typmod stores a "range" in its high 16 bits and a "precision"
1035 : * in its low 16 bits. Both contribute to defining the resolution of the
1036 : * type. Range addresses resolution granules larger than one second, and
1037 : * precision specifies resolution below one second. This representation can
1038 : * express all SQL standard resolutions, but we implement them all in terms of
1039 : * truncating rightward from some position. Range is a bitmap of permitted
1040 : * fields, but only the temporally-smallest such field is significant to our
1041 : * calculations. Precision is a count of sub-second decimal places to retain.
1042 : * Setting all bits (INTERVAL_FULL_PRECISION) gives the same truncation
1043 : * semantics as choosing MAX_INTERVAL_PRECISION.
1044 : */
1045 : Datum
1046 354 : intervaltypmodin(PG_FUNCTION_ARGS)
1047 : {
1048 354 : ArrayType *ta = PG_GETARG_ARRAYTYPE_P(0);
1049 : int32 *tl;
1050 : int n;
1051 : int32 typmod;
1052 :
1053 354 : tl = ArrayGetIntegerTypmods(ta, &n);
1054 :
1055 : /*
1056 : * tl[0] - interval range (fields bitmask) tl[1] - precision (optional)
1057 : *
1058 : * Note we must validate tl[0] even though it's normally guaranteed
1059 : * correct by the grammar --- consider SELECT 'foo'::"interval"(1000).
1060 : */
1061 354 : if (n > 0)
1062 : {
1063 354 : switch (tl[0])
1064 : {
1065 354 : case INTERVAL_MASK(YEAR):
1066 : case INTERVAL_MASK(MONTH):
1067 : case INTERVAL_MASK(DAY):
1068 : case INTERVAL_MASK(HOUR):
1069 : case INTERVAL_MASK(MINUTE):
1070 : case INTERVAL_MASK(SECOND):
1071 : case INTERVAL_MASK(YEAR) | INTERVAL_MASK(MONTH):
1072 : case INTERVAL_MASK(DAY) | INTERVAL_MASK(HOUR):
1073 : case INTERVAL_MASK(DAY) | INTERVAL_MASK(HOUR) | INTERVAL_MASK(MINUTE):
1074 : case INTERVAL_MASK(DAY) | INTERVAL_MASK(HOUR) | INTERVAL_MASK(MINUTE) | INTERVAL_MASK(SECOND):
1075 : case INTERVAL_MASK(HOUR) | INTERVAL_MASK(MINUTE):
1076 : case INTERVAL_MASK(HOUR) | INTERVAL_MASK(MINUTE) | INTERVAL_MASK(SECOND):
1077 : case INTERVAL_MASK(MINUTE) | INTERVAL_MASK(SECOND):
1078 : case INTERVAL_FULL_RANGE:
1079 : /* all OK */
1080 354 : break;
1081 0 : default:
1082 0 : ereport(ERROR,
1083 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
1084 : errmsg("invalid INTERVAL type modifier")));
1085 : }
1086 : }
1087 :
1088 354 : if (n == 1)
1089 : {
1090 258 : if (tl[0] != INTERVAL_FULL_RANGE)
1091 258 : typmod = INTERVAL_TYPMOD(INTERVAL_FULL_PRECISION, tl[0]);
1092 : else
1093 0 : typmod = -1;
1094 : }
1095 96 : else if (n == 2)
1096 : {
1097 96 : if (tl[1] < 0)
1098 0 : ereport(ERROR,
1099 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
1100 : errmsg("INTERVAL(%d) precision must not be negative",
1101 : tl[1])));
1102 96 : if (tl[1] > MAX_INTERVAL_PRECISION)
1103 : {
1104 0 : ereport(WARNING,
1105 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
1106 : errmsg("INTERVAL(%d) precision reduced to maximum allowed, %d",
1107 : tl[1], MAX_INTERVAL_PRECISION)));
1108 0 : typmod = INTERVAL_TYPMOD(MAX_INTERVAL_PRECISION, tl[0]);
1109 : }
1110 : else
1111 96 : typmod = INTERVAL_TYPMOD(tl[1], tl[0]);
1112 : }
1113 : else
1114 : {
1115 0 : ereport(ERROR,
1116 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
1117 : errmsg("invalid INTERVAL type modifier")));
1118 : typmod = 0; /* keep compiler quiet */
1119 : }
1120 :
1121 354 : PG_RETURN_INT32(typmod);
1122 : }
1123 :
1124 : Datum
1125 0 : intervaltypmodout(PG_FUNCTION_ARGS)
1126 : {
1127 0 : int32 typmod = PG_GETARG_INT32(0);
1128 0 : char *res = (char *) palloc(64);
1129 : int fields;
1130 : int precision;
1131 : const char *fieldstr;
1132 :
1133 0 : if (typmod < 0)
1134 : {
1135 0 : *res = '\0';
1136 0 : PG_RETURN_CSTRING(res);
1137 : }
1138 :
1139 0 : fields = INTERVAL_RANGE(typmod);
1140 0 : precision = INTERVAL_PRECISION(typmod);
1141 :
1142 0 : switch (fields)
1143 : {
1144 0 : case INTERVAL_MASK(YEAR):
1145 0 : fieldstr = " year";
1146 0 : break;
1147 0 : case INTERVAL_MASK(MONTH):
1148 0 : fieldstr = " month";
1149 0 : break;
1150 0 : case INTERVAL_MASK(DAY):
1151 0 : fieldstr = " day";
1152 0 : break;
1153 0 : case INTERVAL_MASK(HOUR):
1154 0 : fieldstr = " hour";
1155 0 : break;
1156 0 : case INTERVAL_MASK(MINUTE):
1157 0 : fieldstr = " minute";
1158 0 : break;
1159 0 : case INTERVAL_MASK(SECOND):
1160 0 : fieldstr = " second";
1161 0 : break;
1162 0 : case INTERVAL_MASK(YEAR) | INTERVAL_MASK(MONTH):
1163 0 : fieldstr = " year to month";
1164 0 : break;
1165 0 : case INTERVAL_MASK(DAY) | INTERVAL_MASK(HOUR):
1166 0 : fieldstr = " day to hour";
1167 0 : break;
1168 0 : case INTERVAL_MASK(DAY) | INTERVAL_MASK(HOUR) | INTERVAL_MASK(MINUTE):
1169 0 : fieldstr = " day to minute";
1170 0 : break;
1171 0 : case INTERVAL_MASK(DAY) | INTERVAL_MASK(HOUR) | INTERVAL_MASK(MINUTE) | INTERVAL_MASK(SECOND):
1172 0 : fieldstr = " day to second";
1173 0 : break;
1174 0 : case INTERVAL_MASK(HOUR) | INTERVAL_MASK(MINUTE):
1175 0 : fieldstr = " hour to minute";
1176 0 : break;
1177 0 : case INTERVAL_MASK(HOUR) | INTERVAL_MASK(MINUTE) | INTERVAL_MASK(SECOND):
1178 0 : fieldstr = " hour to second";
1179 0 : break;
1180 0 : case INTERVAL_MASK(MINUTE) | INTERVAL_MASK(SECOND):
1181 0 : fieldstr = " minute to second";
1182 0 : break;
1183 0 : case INTERVAL_FULL_RANGE:
1184 0 : fieldstr = "";
1185 0 : break;
1186 0 : default:
1187 0 : elog(ERROR, "invalid INTERVAL typmod: 0x%x", typmod);
1188 : fieldstr = "";
1189 : break;
1190 : }
1191 :
1192 0 : if (precision != INTERVAL_FULL_PRECISION)
1193 0 : snprintf(res, 64, "%s(%d)", fieldstr, precision);
1194 : else
1195 0 : snprintf(res, 64, "%s", fieldstr);
1196 :
1197 0 : PG_RETURN_CSTRING(res);
1198 : }
1199 :
1200 : /*
1201 : * Given an interval typmod value, return a code for the least-significant
1202 : * field that the typmod allows to be nonzero, for instance given
1203 : * INTERVAL DAY TO HOUR we want to identify "hour".
1204 : *
1205 : * The results should be ordered by field significance, which means
1206 : * we can't use the dt.h macros YEAR etc, because for some odd reason
1207 : * they aren't ordered that way. Instead, arbitrarily represent
1208 : * SECOND = 0, MINUTE = 1, HOUR = 2, DAY = 3, MONTH = 4, YEAR = 5.
1209 : */
1210 : static int
1211 36 : intervaltypmodleastfield(int32 typmod)
1212 : {
1213 36 : if (typmod < 0)
1214 12 : return 0; /* SECOND */
1215 :
1216 24 : switch (INTERVAL_RANGE(typmod))
1217 : {
1218 6 : case INTERVAL_MASK(YEAR):
1219 6 : return 5; /* YEAR */
1220 12 : case INTERVAL_MASK(MONTH):
1221 12 : return 4; /* MONTH */
1222 0 : case INTERVAL_MASK(DAY):
1223 0 : return 3; /* DAY */
1224 0 : case INTERVAL_MASK(HOUR):
1225 0 : return 2; /* HOUR */
1226 0 : case INTERVAL_MASK(MINUTE):
1227 0 : return 1; /* MINUTE */
1228 0 : case INTERVAL_MASK(SECOND):
1229 0 : return 0; /* SECOND */
1230 0 : case INTERVAL_MASK(YEAR) | INTERVAL_MASK(MONTH):
1231 0 : return 4; /* MONTH */
1232 0 : case INTERVAL_MASK(DAY) | INTERVAL_MASK(HOUR):
1233 0 : return 2; /* HOUR */
1234 6 : case INTERVAL_MASK(DAY) | INTERVAL_MASK(HOUR) | INTERVAL_MASK(MINUTE):
1235 6 : return 1; /* MINUTE */
1236 0 : case INTERVAL_MASK(DAY) | INTERVAL_MASK(HOUR) | INTERVAL_MASK(MINUTE) | INTERVAL_MASK(SECOND):
1237 0 : return 0; /* SECOND */
1238 0 : case INTERVAL_MASK(HOUR) | INTERVAL_MASK(MINUTE):
1239 0 : return 1; /* MINUTE */
1240 0 : case INTERVAL_MASK(HOUR) | INTERVAL_MASK(MINUTE) | INTERVAL_MASK(SECOND):
1241 0 : return 0; /* SECOND */
1242 0 : case INTERVAL_MASK(MINUTE) | INTERVAL_MASK(SECOND):
1243 0 : return 0; /* SECOND */
1244 0 : case INTERVAL_FULL_RANGE:
1245 0 : return 0; /* SECOND */
1246 0 : default:
1247 0 : elog(ERROR, "invalid INTERVAL typmod: 0x%x", typmod);
1248 : break;
1249 : }
1250 : return 0; /* can't get here, but keep compiler quiet */
1251 : }
1252 :
1253 :
1254 : /*
1255 : * interval_support()
1256 : *
1257 : * Planner support function for interval_scale().
1258 : *
1259 : * Flatten superfluous calls to interval_scale(). The interval typmod is
1260 : * complex to permit accepting and regurgitating all SQL standard variations.
1261 : * For truncation purposes, it boils down to a single, simple granularity.
1262 : */
1263 : Datum
1264 36 : interval_support(PG_FUNCTION_ARGS)
1265 : {
1266 36 : Node *rawreq = (Node *) PG_GETARG_POINTER(0);
1267 36 : Node *ret = NULL;
1268 :
1269 36 : if (IsA(rawreq, SupportRequestSimplify))
1270 : {
1271 18 : SupportRequestSimplify *req = (SupportRequestSimplify *) rawreq;
1272 18 : FuncExpr *expr = req->fcall;
1273 : Node *typmod;
1274 :
1275 : Assert(list_length(expr->args) >= 2);
1276 :
1277 18 : typmod = (Node *) lsecond(expr->args);
1278 :
1279 18 : if (IsA(typmod, Const) && !((Const *) typmod)->constisnull)
1280 : {
1281 18 : Node *source = (Node *) linitial(expr->args);
1282 18 : int32 new_typmod = DatumGetInt32(((Const *) typmod)->constvalue);
1283 : bool noop;
1284 :
1285 18 : if (new_typmod < 0)
1286 0 : noop = true;
1287 : else
1288 : {
1289 18 : int32 old_typmod = exprTypmod(source);
1290 : int old_least_field;
1291 : int new_least_field;
1292 : int old_precis;
1293 : int new_precis;
1294 :
1295 18 : old_least_field = intervaltypmodleastfield(old_typmod);
1296 18 : new_least_field = intervaltypmodleastfield(new_typmod);
1297 18 : if (old_typmod < 0)
1298 12 : old_precis = INTERVAL_FULL_PRECISION;
1299 : else
1300 6 : old_precis = INTERVAL_PRECISION(old_typmod);
1301 18 : new_precis = INTERVAL_PRECISION(new_typmod);
1302 :
1303 : /*
1304 : * Cast is a no-op if least field stays the same or decreases
1305 : * while precision stays the same or increases. But
1306 : * precision, which is to say, sub-second precision, only
1307 : * affects ranges that include SECOND.
1308 : */
1309 18 : noop = (new_least_field <= old_least_field) &&
1310 0 : (old_least_field > 0 /* SECOND */ ||
1311 0 : new_precis >= MAX_INTERVAL_PRECISION ||
1312 : new_precis >= old_precis);
1313 : }
1314 18 : if (noop)
1315 0 : ret = relabel_to_typmod(source, new_typmod);
1316 : }
1317 : }
1318 :
1319 36 : PG_RETURN_POINTER(ret);
1320 : }
1321 :
1322 : /* interval_scale()
1323 : * Adjust interval type for specified fields.
1324 : * Used by PostgreSQL type system to stuff columns.
1325 : */
1326 : Datum
1327 216 : interval_scale(PG_FUNCTION_ARGS)
1328 : {
1329 216 : Interval *interval = PG_GETARG_INTERVAL_P(0);
1330 216 : int32 typmod = PG_GETARG_INT32(1);
1331 : Interval *result;
1332 :
1333 216 : result = palloc(sizeof(Interval));
1334 216 : *result = *interval;
1335 :
1336 216 : AdjustIntervalForTypmod(result, typmod, NULL);
1337 :
1338 216 : PG_RETURN_INTERVAL_P(result);
1339 : }
1340 :
1341 : /*
1342 : * Adjust interval for specified precision, in both YEAR to SECOND
1343 : * range and sub-second precision.
1344 : *
1345 : * Returns true on success, false on failure (if escontext points to an
1346 : * ErrorSaveContext; otherwise errors are thrown).
1347 : */
1348 : static bool
1349 11070 : AdjustIntervalForTypmod(Interval *interval, int32 typmod,
1350 : Node *escontext)
1351 : {
1352 : static const int64 IntervalScales[MAX_INTERVAL_PRECISION + 1] = {
1353 : INT64CONST(1000000),
1354 : INT64CONST(100000),
1355 : INT64CONST(10000),
1356 : INT64CONST(1000),
1357 : INT64CONST(100),
1358 : INT64CONST(10),
1359 : INT64CONST(1)
1360 : };
1361 :
1362 : static const int64 IntervalOffsets[MAX_INTERVAL_PRECISION + 1] = {
1363 : INT64CONST(500000),
1364 : INT64CONST(50000),
1365 : INT64CONST(5000),
1366 : INT64CONST(500),
1367 : INT64CONST(50),
1368 : INT64CONST(5),
1369 : INT64CONST(0)
1370 : };
1371 :
1372 : /* Typmod has no effect on infinite intervals */
1373 11070 : if (INTERVAL_NOT_FINITE(interval))
1374 1020 : return true;
1375 :
1376 : /*
1377 : * Unspecified range and precision? Then not necessary to adjust. Setting
1378 : * typmod to -1 is the convention for all data types.
1379 : */
1380 10050 : if (typmod >= 0)
1381 : {
1382 462 : int range = INTERVAL_RANGE(typmod);
1383 462 : int precision = INTERVAL_PRECISION(typmod);
1384 :
1385 : /*
1386 : * Our interpretation of intervals with a limited set of fields is
1387 : * that fields to the right of the last one specified are zeroed out,
1388 : * but those to the left of it remain valid. Thus for example there
1389 : * is no operational difference between INTERVAL YEAR TO MONTH and
1390 : * INTERVAL MONTH. In some cases we could meaningfully enforce that
1391 : * higher-order fields are zero; for example INTERVAL DAY could reject
1392 : * nonzero "month" field. However that seems a bit pointless when we
1393 : * can't do it consistently. (We cannot enforce a range limit on the
1394 : * highest expected field, since we do not have any equivalent of
1395 : * SQL's <interval leading field precision>.) If we ever decide to
1396 : * revisit this, interval_support will likely require adjusting.
1397 : *
1398 : * Note: before PG 8.4 we interpreted a limited set of fields as
1399 : * actually causing a "modulo" operation on a given value, potentially
1400 : * losing high-order as well as low-order information. But there is
1401 : * no support for such behavior in the standard, and it seems fairly
1402 : * undesirable on data consistency grounds anyway. Now we only
1403 : * perform truncation or rounding of low-order fields.
1404 : */
1405 462 : if (range == INTERVAL_FULL_RANGE)
1406 : {
1407 : /* Do nothing... */
1408 : }
1409 450 : else if (range == INTERVAL_MASK(YEAR))
1410 : {
1411 66 : interval->month = (interval->month / MONTHS_PER_YEAR) * MONTHS_PER_YEAR;
1412 66 : interval->day = 0;
1413 66 : interval->time = 0;
1414 : }
1415 384 : else if (range == INTERVAL_MASK(MONTH))
1416 : {
1417 72 : interval->day = 0;
1418 72 : interval->time = 0;
1419 : }
1420 : /* YEAR TO MONTH */
1421 312 : else if (range == (INTERVAL_MASK(YEAR) | INTERVAL_MASK(MONTH)))
1422 : {
1423 18 : interval->day = 0;
1424 18 : interval->time = 0;
1425 : }
1426 294 : else if (range == INTERVAL_MASK(DAY))
1427 : {
1428 12 : interval->time = 0;
1429 : }
1430 282 : else if (range == INTERVAL_MASK(HOUR))
1431 : {
1432 12 : interval->time = (interval->time / USECS_PER_HOUR) *
1433 : USECS_PER_HOUR;
1434 : }
1435 270 : else if (range == INTERVAL_MASK(MINUTE))
1436 : {
1437 12 : interval->time = (interval->time / USECS_PER_MINUTE) *
1438 : USECS_PER_MINUTE;
1439 : }
1440 258 : else if (range == INTERVAL_MASK(SECOND))
1441 : {
1442 : /* fractional-second rounding will be dealt with below */
1443 : }
1444 : /* DAY TO HOUR */
1445 222 : else if (range == (INTERVAL_MASK(DAY) |
1446 : INTERVAL_MASK(HOUR)))
1447 : {
1448 24 : interval->time = (interval->time / USECS_PER_HOUR) *
1449 : USECS_PER_HOUR;
1450 : }
1451 : /* DAY TO MINUTE */
1452 198 : else if (range == (INTERVAL_MASK(DAY) |
1453 : INTERVAL_MASK(HOUR) |
1454 : INTERVAL_MASK(MINUTE)))
1455 : {
1456 72 : interval->time = (interval->time / USECS_PER_MINUTE) *
1457 : USECS_PER_MINUTE;
1458 : }
1459 : /* DAY TO SECOND */
1460 126 : else if (range == (INTERVAL_MASK(DAY) |
1461 : INTERVAL_MASK(HOUR) |
1462 : INTERVAL_MASK(MINUTE) |
1463 : INTERVAL_MASK(SECOND)))
1464 : {
1465 : /* fractional-second rounding will be dealt with below */
1466 : }
1467 : /* HOUR TO MINUTE */
1468 90 : else if (range == (INTERVAL_MASK(HOUR) |
1469 : INTERVAL_MASK(MINUTE)))
1470 : {
1471 12 : interval->time = (interval->time / USECS_PER_MINUTE) *
1472 : USECS_PER_MINUTE;
1473 : }
1474 : /* HOUR TO SECOND */
1475 78 : else if (range == (INTERVAL_MASK(HOUR) |
1476 : INTERVAL_MASK(MINUTE) |
1477 : INTERVAL_MASK(SECOND)))
1478 : {
1479 : /* fractional-second rounding will be dealt with below */
1480 : }
1481 : /* MINUTE TO SECOND */
1482 54 : else if (range == (INTERVAL_MASK(MINUTE) |
1483 : INTERVAL_MASK(SECOND)))
1484 : {
1485 : /* fractional-second rounding will be dealt with below */
1486 : }
1487 : else
1488 0 : elog(ERROR, "unrecognized interval typmod: %d", typmod);
1489 :
1490 : /* Need to adjust sub-second precision? */
1491 462 : if (precision != INTERVAL_FULL_PRECISION)
1492 : {
1493 78 : if (precision < 0 || precision > MAX_INTERVAL_PRECISION)
1494 0 : ereturn(escontext, false,
1495 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
1496 : errmsg("interval(%d) precision must be between %d and %d",
1497 : precision, 0, MAX_INTERVAL_PRECISION)));
1498 :
1499 78 : if (interval->time >= INT64CONST(0))
1500 : {
1501 72 : if (pg_add_s64_overflow(interval->time,
1502 : IntervalOffsets[precision],
1503 72 : &interval->time))
1504 6 : ereturn(escontext, false,
1505 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
1506 : errmsg("interval out of range")));
1507 66 : interval->time -= interval->time % IntervalScales[precision];
1508 : }
1509 : else
1510 : {
1511 6 : if (pg_sub_s64_overflow(interval->time,
1512 : IntervalOffsets[precision],
1513 6 : &interval->time))
1514 6 : ereturn(escontext, false,
1515 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
1516 : errmsg("interval out of range")));
1517 0 : interval->time -= interval->time % IntervalScales[precision];
1518 : }
1519 : }
1520 : }
1521 :
1522 10038 : return true;
1523 : }
1524 :
1525 : /*
1526 : * make_interval - numeric Interval constructor
1527 : */
1528 : Datum
1529 132 : make_interval(PG_FUNCTION_ARGS)
1530 : {
1531 132 : int32 years = PG_GETARG_INT32(0);
1532 132 : int32 months = PG_GETARG_INT32(1);
1533 132 : int32 weeks = PG_GETARG_INT32(2);
1534 132 : int32 days = PG_GETARG_INT32(3);
1535 132 : int32 hours = PG_GETARG_INT32(4);
1536 132 : int32 mins = PG_GETARG_INT32(5);
1537 132 : double secs = PG_GETARG_FLOAT8(6);
1538 : Interval *result;
1539 :
1540 : /*
1541 : * Reject out-of-range inputs. We reject any input values that cause
1542 : * integer overflow of the corresponding interval fields.
1543 : */
1544 132 : if (isinf(secs) || isnan(secs))
1545 12 : goto out_of_range;
1546 :
1547 120 : result = (Interval *) palloc(sizeof(Interval));
1548 :
1549 : /* years and months -> months */
1550 228 : if (pg_mul_s32_overflow(years, MONTHS_PER_YEAR, &result->month) ||
1551 108 : pg_add_s32_overflow(result->month, months, &result->month))
1552 24 : goto out_of_range;
1553 :
1554 : /* weeks and days -> days */
1555 180 : if (pg_mul_s32_overflow(weeks, DAYS_PER_WEEK, &result->day) ||
1556 84 : pg_add_s32_overflow(result->day, days, &result->day))
1557 24 : goto out_of_range;
1558 :
1559 : /* hours and mins -> usecs (cannot overflow 64-bit) */
1560 72 : result->time = hours * USECS_PER_HOUR + mins * USECS_PER_MINUTE;
1561 :
1562 : /* secs -> usecs */
1563 72 : secs = rint(float8_mul(secs, USECS_PER_SEC));
1564 120 : if (!FLOAT8_FITS_IN_INT64(secs) ||
1565 54 : pg_add_s64_overflow(result->time, (int64) secs, &result->time))
1566 24 : goto out_of_range;
1567 :
1568 : /* make sure that the result is finite */
1569 42 : if (INTERVAL_NOT_FINITE(result))
1570 0 : goto out_of_range;
1571 :
1572 42 : PG_RETURN_INTERVAL_P(result);
1573 :
1574 84 : out_of_range:
1575 84 : ereport(ERROR,
1576 : errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
1577 : errmsg("interval out of range"));
1578 :
1579 : PG_RETURN_NULL(); /* keep compiler quiet */
1580 : }
1581 :
1582 : /* EncodeSpecialTimestamp()
1583 : * Convert reserved timestamp data type to string.
1584 : */
1585 : void
1586 1248 : EncodeSpecialTimestamp(Timestamp dt, char *str)
1587 : {
1588 1248 : if (TIMESTAMP_IS_NOBEGIN(dt))
1589 616 : strcpy(str, EARLY);
1590 632 : else if (TIMESTAMP_IS_NOEND(dt))
1591 632 : strcpy(str, LATE);
1592 : else /* shouldn't happen */
1593 0 : elog(ERROR, "invalid argument for EncodeSpecialTimestamp");
1594 1248 : }
1595 :
1596 : static void
1597 2024 : EncodeSpecialInterval(const Interval *interval, char *str)
1598 : {
1599 2024 : if (INTERVAL_IS_NOBEGIN(interval))
1600 994 : strcpy(str, EARLY);
1601 1030 : else if (INTERVAL_IS_NOEND(interval))
1602 1030 : strcpy(str, LATE);
1603 : else /* shouldn't happen */
1604 0 : elog(ERROR, "invalid argument for EncodeSpecialInterval");
1605 2024 : }
1606 :
1607 : Datum
1608 70548 : now(PG_FUNCTION_ARGS)
1609 : {
1610 70548 : PG_RETURN_TIMESTAMPTZ(GetCurrentTransactionStartTimestamp());
1611 : }
1612 :
1613 : Datum
1614 6 : statement_timestamp(PG_FUNCTION_ARGS)
1615 : {
1616 6 : PG_RETURN_TIMESTAMPTZ(GetCurrentStatementStartTimestamp());
1617 : }
1618 :
1619 : Datum
1620 24 : clock_timestamp(PG_FUNCTION_ARGS)
1621 : {
1622 24 : PG_RETURN_TIMESTAMPTZ(GetCurrentTimestamp());
1623 : }
1624 :
1625 : Datum
1626 0 : pg_postmaster_start_time(PG_FUNCTION_ARGS)
1627 : {
1628 0 : PG_RETURN_TIMESTAMPTZ(PgStartTime);
1629 : }
1630 :
1631 : Datum
1632 0 : pg_conf_load_time(PG_FUNCTION_ARGS)
1633 : {
1634 0 : PG_RETURN_TIMESTAMPTZ(PgReloadTime);
1635 : }
1636 :
1637 : /*
1638 : * GetCurrentTimestamp -- get the current operating system time
1639 : *
1640 : * Result is in the form of a TimestampTz value, and is expressed to the
1641 : * full precision of the gettimeofday() syscall
1642 : */
1643 : TimestampTz
1644 8630248 : GetCurrentTimestamp(void)
1645 : {
1646 : TimestampTz result;
1647 : struct timeval tp;
1648 :
1649 8630248 : gettimeofday(&tp, NULL);
1650 :
1651 8630248 : result = (TimestampTz) tp.tv_sec -
1652 : ((POSTGRES_EPOCH_JDATE - UNIX_EPOCH_JDATE) * SECS_PER_DAY);
1653 8630248 : result = (result * USECS_PER_SEC) + tp.tv_usec;
1654 :
1655 8630248 : return result;
1656 : }
1657 :
1658 : /*
1659 : * GetSQLCurrentTimestamp -- implements CURRENT_TIMESTAMP, CURRENT_TIMESTAMP(n)
1660 : */
1661 : TimestampTz
1662 288 : GetSQLCurrentTimestamp(int32 typmod)
1663 : {
1664 : TimestampTz ts;
1665 :
1666 288 : ts = GetCurrentTransactionStartTimestamp();
1667 288 : if (typmod >= 0)
1668 12 : AdjustTimestampForTypmod(&ts, typmod, NULL);
1669 288 : return ts;
1670 : }
1671 :
1672 : /*
1673 : * GetSQLLocalTimestamp -- implements LOCALTIMESTAMP, LOCALTIMESTAMP(n)
1674 : */
1675 : Timestamp
1676 66 : GetSQLLocalTimestamp(int32 typmod)
1677 : {
1678 : Timestamp ts;
1679 :
1680 66 : ts = timestamptz2timestamp(GetCurrentTransactionStartTimestamp());
1681 66 : if (typmod >= 0)
1682 6 : AdjustTimestampForTypmod(&ts, typmod, NULL);
1683 66 : return ts;
1684 : }
1685 :
1686 : /*
1687 : * timeofday(*) -- returns the current time as a text.
1688 : */
1689 : Datum
1690 1600 : timeofday(PG_FUNCTION_ARGS)
1691 : {
1692 : struct timeval tp;
1693 : char templ[128];
1694 : char buf[128];
1695 : pg_time_t tt;
1696 :
1697 1600 : gettimeofday(&tp, NULL);
1698 1600 : tt = (pg_time_t) tp.tv_sec;
1699 1600 : pg_strftime(templ, sizeof(templ), "%a %b %d %H:%M:%S.%%06d %Y %Z",
1700 1600 : pg_localtime(&tt, session_timezone));
1701 1600 : snprintf(buf, sizeof(buf), templ, tp.tv_usec);
1702 :
1703 1600 : PG_RETURN_TEXT_P(cstring_to_text(buf));
1704 : }
1705 :
1706 : /*
1707 : * TimestampDifference -- convert the difference between two timestamps
1708 : * into integer seconds and microseconds
1709 : *
1710 : * This is typically used to calculate a wait timeout for select(2),
1711 : * which explains the otherwise-odd choice of output format.
1712 : *
1713 : * Both inputs must be ordinary finite timestamps (in current usage,
1714 : * they'll be results from GetCurrentTimestamp()).
1715 : *
1716 : * We expect start_time <= stop_time. If not, we return zeros,
1717 : * since then we're already past the previously determined stop_time.
1718 : */
1719 : void
1720 1056052 : TimestampDifference(TimestampTz start_time, TimestampTz stop_time,
1721 : long *secs, int *microsecs)
1722 : {
1723 1056052 : TimestampTz diff = stop_time - start_time;
1724 :
1725 1056052 : if (diff <= 0)
1726 : {
1727 270 : *secs = 0;
1728 270 : *microsecs = 0;
1729 : }
1730 : else
1731 : {
1732 1055782 : *secs = (long) (diff / USECS_PER_SEC);
1733 1055782 : *microsecs = (int) (diff % USECS_PER_SEC);
1734 : }
1735 1056052 : }
1736 :
1737 : /*
1738 : * TimestampDifferenceMilliseconds -- convert the difference between two
1739 : * timestamps into integer milliseconds
1740 : *
1741 : * This is typically used to calculate a wait timeout for WaitLatch()
1742 : * or a related function. The choice of "long" as the result type
1743 : * is to harmonize with that; furthermore, we clamp the result to at most
1744 : * INT_MAX milliseconds, because that's all that WaitLatch() allows.
1745 : *
1746 : * We expect start_time <= stop_time. If not, we return zero,
1747 : * since then we're already past the previously determined stop_time.
1748 : *
1749 : * Subtracting finite and infinite timestamps works correctly, returning
1750 : * zero or INT_MAX as appropriate.
1751 : *
1752 : * Note we round up any fractional millisecond, since waiting for just
1753 : * less than the intended timeout is undesirable.
1754 : */
1755 : long
1756 212318 : TimestampDifferenceMilliseconds(TimestampTz start_time, TimestampTz stop_time)
1757 : {
1758 : TimestampTz diff;
1759 :
1760 : /* Deal with zero or negative elapsed time quickly. */
1761 212318 : if (start_time >= stop_time)
1762 0 : return 0;
1763 : /* To not fail with timestamp infinities, we must detect overflow. */
1764 212318 : if (pg_sub_s64_overflow(stop_time, start_time, &diff))
1765 0 : return (long) INT_MAX;
1766 212318 : if (diff >= (INT_MAX * INT64CONST(1000) - 999))
1767 0 : return (long) INT_MAX;
1768 : else
1769 212318 : return (long) ((diff + 999) / 1000);
1770 : }
1771 :
1772 : /*
1773 : * TimestampDifferenceExceeds -- report whether the difference between two
1774 : * timestamps is >= a threshold (expressed in milliseconds)
1775 : *
1776 : * Both inputs must be ordinary finite timestamps (in current usage,
1777 : * they'll be results from GetCurrentTimestamp()).
1778 : */
1779 : bool
1780 1014472 : TimestampDifferenceExceeds(TimestampTz start_time,
1781 : TimestampTz stop_time,
1782 : int msec)
1783 : {
1784 1014472 : TimestampTz diff = stop_time - start_time;
1785 :
1786 1014472 : return (diff >= msec * INT64CONST(1000));
1787 : }
1788 :
1789 : /*
1790 : * Convert a time_t to TimestampTz.
1791 : *
1792 : * We do not use time_t internally in Postgres, but this is provided for use
1793 : * by functions that need to interpret, say, a stat(2) result.
1794 : *
1795 : * To avoid having the function's ABI vary depending on the width of time_t,
1796 : * we declare the argument as pg_time_t, which is cast-compatible with
1797 : * time_t but always 64 bits wide (unless the platform has no 64-bit type).
1798 : * This detail should be invisible to callers, at least at source code level.
1799 : */
1800 : TimestampTz
1801 43652 : time_t_to_timestamptz(pg_time_t tm)
1802 : {
1803 : TimestampTz result;
1804 :
1805 43652 : result = (TimestampTz) tm -
1806 : ((POSTGRES_EPOCH_JDATE - UNIX_EPOCH_JDATE) * SECS_PER_DAY);
1807 43652 : result *= USECS_PER_SEC;
1808 :
1809 43652 : return result;
1810 : }
1811 :
1812 : /*
1813 : * Convert a TimestampTz to time_t.
1814 : *
1815 : * This too is just marginally useful, but some places need it.
1816 : *
1817 : * To avoid having the function's ABI vary depending on the width of time_t,
1818 : * we declare the result as pg_time_t, which is cast-compatible with
1819 : * time_t but always 64 bits wide (unless the platform has no 64-bit type).
1820 : * This detail should be invisible to callers, at least at source code level.
1821 : */
1822 : pg_time_t
1823 38544 : timestamptz_to_time_t(TimestampTz t)
1824 : {
1825 : pg_time_t result;
1826 :
1827 38544 : result = (pg_time_t) (t / USECS_PER_SEC +
1828 : ((POSTGRES_EPOCH_JDATE - UNIX_EPOCH_JDATE) * SECS_PER_DAY));
1829 :
1830 38544 : return result;
1831 : }
1832 :
1833 : /*
1834 : * Produce a C-string representation of a TimestampTz.
1835 : *
1836 : * This is mostly for use in emitting messages. The primary difference
1837 : * from timestamptz_out is that we force the output format to ISO. Note
1838 : * also that the result is in a static buffer, not pstrdup'd.
1839 : *
1840 : * See also pg_strftime.
1841 : */
1842 : const char *
1843 2594 : timestamptz_to_str(TimestampTz t)
1844 : {
1845 : static char buf[MAXDATELEN + 1];
1846 : int tz;
1847 : struct pg_tm tt,
1848 2594 : *tm = &tt;
1849 : fsec_t fsec;
1850 : const char *tzn;
1851 :
1852 2594 : if (TIMESTAMP_NOT_FINITE(t))
1853 0 : EncodeSpecialTimestamp(t, buf);
1854 2594 : else if (timestamp2tm(t, &tz, tm, &fsec, &tzn, NULL) == 0)
1855 2594 : EncodeDateTime(tm, fsec, true, tz, tzn, USE_ISO_DATES, buf);
1856 : else
1857 0 : strlcpy(buf, "(timestamp out of range)", sizeof(buf));
1858 :
1859 2594 : return buf;
1860 : }
1861 :
1862 :
1863 : void
1864 255118 : dt2time(Timestamp jd, int *hour, int *min, int *sec, fsec_t *fsec)
1865 : {
1866 : TimeOffset time;
1867 :
1868 255118 : time = jd;
1869 :
1870 255118 : *hour = time / USECS_PER_HOUR;
1871 255118 : time -= (*hour) * USECS_PER_HOUR;
1872 255118 : *min = time / USECS_PER_MINUTE;
1873 255118 : time -= (*min) * USECS_PER_MINUTE;
1874 255118 : *sec = time / USECS_PER_SEC;
1875 255118 : *fsec = time - (*sec * USECS_PER_SEC);
1876 255118 : } /* dt2time() */
1877 :
1878 :
1879 : /*
1880 : * timestamp2tm() - Convert timestamp data type to POSIX time structure.
1881 : *
1882 : * Note that year is _not_ 1900-based, but is an explicit full value.
1883 : * Also, month is one-based, _not_ zero-based.
1884 : * Returns:
1885 : * 0 on success
1886 : * -1 on out of range
1887 : *
1888 : * If attimezone is NULL, the global timezone setting will be used.
1889 : */
1890 : int
1891 255106 : timestamp2tm(Timestamp dt, int *tzp, struct pg_tm *tm, fsec_t *fsec, const char **tzn, pg_tz *attimezone)
1892 : {
1893 : Timestamp date;
1894 : Timestamp time;
1895 : pg_time_t utime;
1896 :
1897 : /* Use session timezone if caller asks for default */
1898 255106 : if (attimezone == NULL)
1899 235794 : attimezone = session_timezone;
1900 :
1901 255106 : time = dt;
1902 255106 : TMODULO(time, date, USECS_PER_DAY);
1903 :
1904 255106 : if (time < INT64CONST(0))
1905 : {
1906 100256 : time += USECS_PER_DAY;
1907 100256 : date -= 1;
1908 : }
1909 :
1910 : /* add offset to go from J2000 back to standard Julian date */
1911 255106 : date += POSTGRES_EPOCH_JDATE;
1912 :
1913 : /* Julian day routine does not work for negative Julian days */
1914 255106 : if (date < 0 || date > (Timestamp) INT_MAX)
1915 0 : return -1;
1916 :
1917 255106 : j2date((int) date, &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
1918 255106 : dt2time(time, &tm->tm_hour, &tm->tm_min, &tm->tm_sec, fsec);
1919 :
1920 : /* Done if no TZ conversion wanted */
1921 255106 : if (tzp == NULL)
1922 : {
1923 83954 : tm->tm_isdst = -1;
1924 83954 : tm->tm_gmtoff = 0;
1925 83954 : tm->tm_zone = NULL;
1926 83954 : if (tzn != NULL)
1927 0 : *tzn = NULL;
1928 83954 : return 0;
1929 : }
1930 :
1931 : /*
1932 : * If the time falls within the range of pg_time_t, use pg_localtime() to
1933 : * rotate to the local time zone.
1934 : *
1935 : * First, convert to an integral timestamp, avoiding possibly
1936 : * platform-specific roundoff-in-wrong-direction errors, and adjust to
1937 : * Unix epoch. Then see if we can convert to pg_time_t without loss. This
1938 : * coding avoids hardwiring any assumptions about the width of pg_time_t,
1939 : * so it should behave sanely on machines without int64.
1940 : */
1941 171152 : dt = (dt - *fsec) / USECS_PER_SEC +
1942 : (POSTGRES_EPOCH_JDATE - UNIX_EPOCH_JDATE) * SECS_PER_DAY;
1943 171152 : utime = (pg_time_t) dt;
1944 171152 : if ((Timestamp) utime == dt)
1945 : {
1946 171152 : struct pg_tm *tx = pg_localtime(&utime, attimezone);
1947 :
1948 171152 : tm->tm_year = tx->tm_year + 1900;
1949 171152 : tm->tm_mon = tx->tm_mon + 1;
1950 171152 : tm->tm_mday = tx->tm_mday;
1951 171152 : tm->tm_hour = tx->tm_hour;
1952 171152 : tm->tm_min = tx->tm_min;
1953 171152 : tm->tm_sec = tx->tm_sec;
1954 171152 : tm->tm_isdst = tx->tm_isdst;
1955 171152 : tm->tm_gmtoff = tx->tm_gmtoff;
1956 171152 : tm->tm_zone = tx->tm_zone;
1957 171152 : *tzp = -tm->tm_gmtoff;
1958 171152 : if (tzn != NULL)
1959 85752 : *tzn = tm->tm_zone;
1960 : }
1961 : else
1962 : {
1963 : /*
1964 : * When out of range of pg_time_t, treat as GMT
1965 : */
1966 0 : *tzp = 0;
1967 : /* Mark this as *no* time zone available */
1968 0 : tm->tm_isdst = -1;
1969 0 : tm->tm_gmtoff = 0;
1970 0 : tm->tm_zone = NULL;
1971 0 : if (tzn != NULL)
1972 0 : *tzn = NULL;
1973 : }
1974 :
1975 171152 : return 0;
1976 : }
1977 :
1978 :
1979 : /* tm2timestamp()
1980 : * Convert a tm structure to a timestamp data type.
1981 : * Note that year is _not_ 1900-based, but is an explicit full value.
1982 : * Also, month is one-based, _not_ zero-based.
1983 : *
1984 : * Returns -1 on failure (value out of range).
1985 : */
1986 : int
1987 167212 : tm2timestamp(struct pg_tm *tm, fsec_t fsec, int *tzp, Timestamp *result)
1988 : {
1989 : TimeOffset date;
1990 : TimeOffset time;
1991 :
1992 : /* Prevent overflow in Julian-day routines */
1993 167212 : if (!IS_VALID_JULIAN(tm->tm_year, tm->tm_mon, tm->tm_mday))
1994 : {
1995 12 : *result = 0; /* keep compiler quiet */
1996 12 : return -1;
1997 : }
1998 :
1999 167200 : date = date2j(tm->tm_year, tm->tm_mon, tm->tm_mday) - POSTGRES_EPOCH_JDATE;
2000 167200 : time = time2t(tm->tm_hour, tm->tm_min, tm->tm_sec, fsec);
2001 :
2002 167200 : if (unlikely(pg_mul_s64_overflow(date, USECS_PER_DAY, result) ||
2003 : pg_add_s64_overflow(*result, time, result)))
2004 : {
2005 6 : *result = 0; /* keep compiler quiet */
2006 6 : return -1;
2007 : }
2008 167194 : if (tzp != NULL)
2009 50922 : *result = dt2local(*result, -(*tzp));
2010 :
2011 : /* final range check catches just-out-of-range timestamps */
2012 167194 : if (!IS_VALID_TIMESTAMP(*result))
2013 : {
2014 24 : *result = 0; /* keep compiler quiet */
2015 24 : return -1;
2016 : }
2017 :
2018 167170 : return 0;
2019 : }
2020 :
2021 :
2022 : /* interval2itm()
2023 : * Convert an Interval to a pg_itm structure.
2024 : * Note: overflow is not possible, because the pg_itm fields are
2025 : * wide enough for all possible conversion results.
2026 : */
2027 : void
2028 15610 : interval2itm(Interval span, struct pg_itm *itm)
2029 : {
2030 : TimeOffset time;
2031 : TimeOffset tfrac;
2032 :
2033 15610 : itm->tm_year = span.month / MONTHS_PER_YEAR;
2034 15610 : itm->tm_mon = span.month % MONTHS_PER_YEAR;
2035 15610 : itm->tm_mday = span.day;
2036 15610 : time = span.time;
2037 :
2038 15610 : tfrac = time / USECS_PER_HOUR;
2039 15610 : time -= tfrac * USECS_PER_HOUR;
2040 15610 : itm->tm_hour = tfrac;
2041 15610 : tfrac = time / USECS_PER_MINUTE;
2042 15610 : time -= tfrac * USECS_PER_MINUTE;
2043 15610 : itm->tm_min = (int) tfrac;
2044 15610 : tfrac = time / USECS_PER_SEC;
2045 15610 : time -= tfrac * USECS_PER_SEC;
2046 15610 : itm->tm_sec = (int) tfrac;
2047 15610 : itm->tm_usec = (int) time;
2048 15610 : }
2049 :
2050 : /* itm2interval()
2051 : * Convert a pg_itm structure to an Interval.
2052 : * Returns 0 if OK, -1 on overflow.
2053 : *
2054 : * This is for use in computations expected to produce finite results. Any
2055 : * inputs that lead to infinite results are treated as overflows.
2056 : */
2057 : int
2058 0 : itm2interval(struct pg_itm *itm, Interval *span)
2059 : {
2060 0 : int64 total_months = (int64) itm->tm_year * MONTHS_PER_YEAR + itm->tm_mon;
2061 :
2062 0 : if (total_months > INT_MAX || total_months < INT_MIN)
2063 0 : return -1;
2064 0 : span->month = (int32) total_months;
2065 0 : span->day = itm->tm_mday;
2066 0 : if (pg_mul_s64_overflow(itm->tm_hour, USECS_PER_HOUR,
2067 0 : &span->time))
2068 0 : return -1;
2069 : /* tm_min, tm_sec are 32 bits, so intermediate products can't overflow */
2070 0 : if (pg_add_s64_overflow(span->time, itm->tm_min * USECS_PER_MINUTE,
2071 0 : &span->time))
2072 0 : return -1;
2073 0 : if (pg_add_s64_overflow(span->time, itm->tm_sec * USECS_PER_SEC,
2074 0 : &span->time))
2075 0 : return -1;
2076 0 : if (pg_add_s64_overflow(span->time, itm->tm_usec,
2077 0 : &span->time))
2078 0 : return -1;
2079 0 : if (INTERVAL_NOT_FINITE(span))
2080 0 : return -1;
2081 0 : return 0;
2082 : }
2083 :
2084 : /* itmin2interval()
2085 : * Convert a pg_itm_in structure to an Interval.
2086 : * Returns 0 if OK, -1 on overflow.
2087 : *
2088 : * Note: if the result is infinite, it is not treated as an overflow. This
2089 : * avoids any dump/reload hazards from pre-17 databases that do not support
2090 : * infinite intervals, but do allow finite intervals with all fields set to
2091 : * INT_MIN/INT_MAX (outside the documented range). Such intervals will be
2092 : * silently converted to +/-infinity. This may not be ideal, but seems
2093 : * preferable to failure, and ought to be pretty unlikely in practice.
2094 : */
2095 : int
2096 24354 : itmin2interval(struct pg_itm_in *itm_in, Interval *span)
2097 : {
2098 24354 : int64 total_months = (int64) itm_in->tm_year * MONTHS_PER_YEAR + itm_in->tm_mon;
2099 :
2100 24354 : if (total_months > INT_MAX || total_months < INT_MIN)
2101 18 : return -1;
2102 24336 : span->month = (int32) total_months;
2103 24336 : span->day = itm_in->tm_mday;
2104 24336 : span->time = itm_in->tm_usec;
2105 24336 : return 0;
2106 : }
2107 :
2108 : static TimeOffset
2109 167200 : time2t(const int hour, const int min, const int sec, const fsec_t fsec)
2110 : {
2111 167200 : return (((((hour * MINS_PER_HOUR) + min) * SECS_PER_MINUTE) + sec) * USECS_PER_SEC) + fsec;
2112 : }
2113 :
2114 : static Timestamp
2115 67428 : dt2local(Timestamp dt, int timezone)
2116 : {
2117 67428 : dt -= (timezone * USECS_PER_SEC);
2118 67428 : return dt;
2119 : }
2120 :
2121 :
2122 : /*****************************************************************************
2123 : * PUBLIC ROUTINES *
2124 : *****************************************************************************/
2125 :
2126 :
2127 : Datum
2128 0 : timestamp_finite(PG_FUNCTION_ARGS)
2129 : {
2130 0 : Timestamp timestamp = PG_GETARG_TIMESTAMP(0);
2131 :
2132 0 : PG_RETURN_BOOL(!TIMESTAMP_NOT_FINITE(timestamp));
2133 : }
2134 :
2135 : Datum
2136 318 : interval_finite(PG_FUNCTION_ARGS)
2137 : {
2138 318 : Interval *interval = PG_GETARG_INTERVAL_P(0);
2139 :
2140 318 : PG_RETURN_BOOL(!INTERVAL_NOT_FINITE(interval));
2141 : }
2142 :
2143 :
2144 : /*----------------------------------------------------------
2145 : * Relational operators for timestamp.
2146 : *---------------------------------------------------------*/
2147 :
2148 : void
2149 28372 : GetEpochTime(struct pg_tm *tm)
2150 : {
2151 : struct pg_tm *t0;
2152 28372 : pg_time_t epoch = 0;
2153 :
2154 28372 : t0 = pg_gmtime(&epoch);
2155 :
2156 28372 : if (t0 == NULL)
2157 0 : elog(ERROR, "could not convert epoch to timestamp: %m");
2158 :
2159 28372 : tm->tm_year = t0->tm_year;
2160 28372 : tm->tm_mon = t0->tm_mon;
2161 28372 : tm->tm_mday = t0->tm_mday;
2162 28372 : tm->tm_hour = t0->tm_hour;
2163 28372 : tm->tm_min = t0->tm_min;
2164 28372 : tm->tm_sec = t0->tm_sec;
2165 :
2166 28372 : tm->tm_year += 1900;
2167 28372 : tm->tm_mon++;
2168 28372 : }
2169 :
2170 : Timestamp
2171 28366 : SetEpochTimestamp(void)
2172 : {
2173 : Timestamp dt;
2174 : struct pg_tm tt,
2175 28366 : *tm = &tt;
2176 :
2177 28366 : GetEpochTime(tm);
2178 : /* we don't bother to test for failure ... */
2179 28366 : tm2timestamp(tm, 0, NULL, &dt);
2180 :
2181 28366 : return dt;
2182 : } /* SetEpochTimestamp() */
2183 :
2184 : /*
2185 : * We are currently sharing some code between timestamp and timestamptz.
2186 : * The comparison functions are among them. - thomas 2001-09-25
2187 : *
2188 : * timestamp_relop - is timestamp1 relop timestamp2
2189 : */
2190 : int
2191 406054 : timestamp_cmp_internal(Timestamp dt1, Timestamp dt2)
2192 : {
2193 406054 : return (dt1 < dt2) ? -1 : ((dt1 > dt2) ? 1 : 0);
2194 : }
2195 :
2196 : Datum
2197 30494 : timestamp_eq(PG_FUNCTION_ARGS)
2198 : {
2199 30494 : Timestamp dt1 = PG_GETARG_TIMESTAMP(0);
2200 30494 : Timestamp dt2 = PG_GETARG_TIMESTAMP(1);
2201 :
2202 30494 : PG_RETURN_BOOL(timestamp_cmp_internal(dt1, dt2) == 0);
2203 : }
2204 :
2205 : Datum
2206 786 : timestamp_ne(PG_FUNCTION_ARGS)
2207 : {
2208 786 : Timestamp dt1 = PG_GETARG_TIMESTAMP(0);
2209 786 : Timestamp dt2 = PG_GETARG_TIMESTAMP(1);
2210 :
2211 786 : PG_RETURN_BOOL(timestamp_cmp_internal(dt1, dt2) != 0);
2212 : }
2213 :
2214 : Datum
2215 124204 : timestamp_lt(PG_FUNCTION_ARGS)
2216 : {
2217 124204 : Timestamp dt1 = PG_GETARG_TIMESTAMP(0);
2218 124204 : Timestamp dt2 = PG_GETARG_TIMESTAMP(1);
2219 :
2220 124204 : PG_RETURN_BOOL(timestamp_cmp_internal(dt1, dt2) < 0);
2221 : }
2222 :
2223 : Datum
2224 98542 : timestamp_gt(PG_FUNCTION_ARGS)
2225 : {
2226 98542 : Timestamp dt1 = PG_GETARG_TIMESTAMP(0);
2227 98542 : Timestamp dt2 = PG_GETARG_TIMESTAMP(1);
2228 :
2229 98542 : PG_RETURN_BOOL(timestamp_cmp_internal(dt1, dt2) > 0);
2230 : }
2231 :
2232 : Datum
2233 18538 : timestamp_le(PG_FUNCTION_ARGS)
2234 : {
2235 18538 : Timestamp dt1 = PG_GETARG_TIMESTAMP(0);
2236 18538 : Timestamp dt2 = PG_GETARG_TIMESTAMP(1);
2237 :
2238 18538 : PG_RETURN_BOOL(timestamp_cmp_internal(dt1, dt2) <= 0);
2239 : }
2240 :
2241 : Datum
2242 18592 : timestamp_ge(PG_FUNCTION_ARGS)
2243 : {
2244 18592 : Timestamp dt1 = PG_GETARG_TIMESTAMP(0);
2245 18592 : Timestamp dt2 = PG_GETARG_TIMESTAMP(1);
2246 :
2247 18592 : PG_RETURN_BOOL(timestamp_cmp_internal(dt1, dt2) >= 0);
2248 : }
2249 :
2250 : Datum
2251 35272 : timestamp_cmp(PG_FUNCTION_ARGS)
2252 : {
2253 35272 : Timestamp dt1 = PG_GETARG_TIMESTAMP(0);
2254 35272 : Timestamp dt2 = PG_GETARG_TIMESTAMP(1);
2255 :
2256 35272 : PG_RETURN_INT32(timestamp_cmp_internal(dt1, dt2));
2257 : }
2258 :
2259 : #if SIZEOF_DATUM < 8
2260 : /* note: this is used for timestamptz also */
2261 : static int
2262 : timestamp_fastcmp(Datum x, Datum y, SortSupport ssup)
2263 : {
2264 : Timestamp a = DatumGetTimestamp(x);
2265 : Timestamp b = DatumGetTimestamp(y);
2266 :
2267 : return timestamp_cmp_internal(a, b);
2268 : }
2269 : #endif
2270 :
2271 : Datum
2272 470 : timestamp_sortsupport(PG_FUNCTION_ARGS)
2273 : {
2274 470 : SortSupport ssup = (SortSupport) PG_GETARG_POINTER(0);
2275 :
2276 : #if SIZEOF_DATUM >= 8
2277 :
2278 : /*
2279 : * If this build has pass-by-value timestamps, then we can use a standard
2280 : * comparator function.
2281 : */
2282 470 : ssup->comparator = ssup_datum_signed_cmp;
2283 : #else
2284 : ssup->comparator = timestamp_fastcmp;
2285 : #endif
2286 470 : PG_RETURN_VOID();
2287 : }
2288 :
2289 : Datum
2290 6494 : timestamp_hash(PG_FUNCTION_ARGS)
2291 : {
2292 6494 : return hashint8(fcinfo);
2293 : }
2294 :
2295 : Datum
2296 60 : timestamp_hash_extended(PG_FUNCTION_ARGS)
2297 : {
2298 60 : return hashint8extended(fcinfo);
2299 : }
2300 :
2301 : Datum
2302 0 : timestamptz_hash(PG_FUNCTION_ARGS)
2303 : {
2304 0 : return hashint8(fcinfo);
2305 : }
2306 :
2307 : Datum
2308 0 : timestamptz_hash_extended(PG_FUNCTION_ARGS)
2309 : {
2310 0 : return hashint8extended(fcinfo);
2311 : }
2312 :
2313 : /*
2314 : * Cross-type comparison functions for timestamp vs timestamptz
2315 : */
2316 :
2317 : int32
2318 15906 : timestamp_cmp_timestamptz_internal(Timestamp timestampVal, TimestampTz dt2)
2319 : {
2320 : TimestampTz dt1;
2321 : int overflow;
2322 :
2323 15906 : dt1 = timestamp2timestamptz_opt_overflow(timestampVal, &overflow);
2324 15906 : if (overflow > 0)
2325 : {
2326 : /* dt1 is larger than any finite timestamp, but less than infinity */
2327 0 : return TIMESTAMP_IS_NOEND(dt2) ? -1 : +1;
2328 : }
2329 15906 : if (overflow < 0)
2330 : {
2331 : /* dt1 is less than any finite timestamp, but more than -infinity */
2332 12 : return TIMESTAMP_IS_NOBEGIN(dt2) ? +1 : -1;
2333 : }
2334 :
2335 15894 : return timestamptz_cmp_internal(dt1, dt2);
2336 : }
2337 :
2338 : Datum
2339 1812 : timestamp_eq_timestamptz(PG_FUNCTION_ARGS)
2340 : {
2341 1812 : Timestamp timestampVal = PG_GETARG_TIMESTAMP(0);
2342 1812 : TimestampTz dt2 = PG_GETARG_TIMESTAMPTZ(1);
2343 :
2344 1812 : PG_RETURN_BOOL(timestamp_cmp_timestamptz_internal(timestampVal, dt2) == 0);
2345 : }
2346 :
2347 : Datum
2348 0 : timestamp_ne_timestamptz(PG_FUNCTION_ARGS)
2349 : {
2350 0 : Timestamp timestampVal = PG_GETARG_TIMESTAMP(0);
2351 0 : TimestampTz dt2 = PG_GETARG_TIMESTAMPTZ(1);
2352 :
2353 0 : PG_RETURN_BOOL(timestamp_cmp_timestamptz_internal(timestampVal, dt2) != 0);
2354 : }
2355 :
2356 : Datum
2357 3204 : timestamp_lt_timestamptz(PG_FUNCTION_ARGS)
2358 : {
2359 3204 : Timestamp timestampVal = PG_GETARG_TIMESTAMP(0);
2360 3204 : TimestampTz dt2 = PG_GETARG_TIMESTAMPTZ(1);
2361 :
2362 3204 : PG_RETURN_BOOL(timestamp_cmp_timestamptz_internal(timestampVal, dt2) < 0);
2363 : }
2364 :
2365 : Datum
2366 3198 : timestamp_gt_timestamptz(PG_FUNCTION_ARGS)
2367 : {
2368 3198 : Timestamp timestampVal = PG_GETARG_TIMESTAMP(0);
2369 3198 : TimestampTz dt2 = PG_GETARG_TIMESTAMPTZ(1);
2370 :
2371 3198 : PG_RETURN_BOOL(timestamp_cmp_timestamptz_internal(timestampVal, dt2) > 0);
2372 : }
2373 :
2374 : Datum
2375 3798 : timestamp_le_timestamptz(PG_FUNCTION_ARGS)
2376 : {
2377 3798 : Timestamp timestampVal = PG_GETARG_TIMESTAMP(0);
2378 3798 : TimestampTz dt2 = PG_GETARG_TIMESTAMPTZ(1);
2379 :
2380 3798 : PG_RETURN_BOOL(timestamp_cmp_timestamptz_internal(timestampVal, dt2) <= 0);
2381 : }
2382 :
2383 : Datum
2384 3504 : timestamp_ge_timestamptz(PG_FUNCTION_ARGS)
2385 : {
2386 3504 : Timestamp timestampVal = PG_GETARG_TIMESTAMP(0);
2387 3504 : TimestampTz dt2 = PG_GETARG_TIMESTAMPTZ(1);
2388 :
2389 3504 : PG_RETURN_BOOL(timestamp_cmp_timestamptz_internal(timestampVal, dt2) >= 0);
2390 : }
2391 :
2392 : Datum
2393 72 : timestamp_cmp_timestamptz(PG_FUNCTION_ARGS)
2394 : {
2395 72 : Timestamp timestampVal = PG_GETARG_TIMESTAMP(0);
2396 72 : TimestampTz dt2 = PG_GETARG_TIMESTAMPTZ(1);
2397 :
2398 72 : PG_RETURN_INT32(timestamp_cmp_timestamptz_internal(timestampVal, dt2));
2399 : }
2400 :
2401 : Datum
2402 0 : timestamptz_eq_timestamp(PG_FUNCTION_ARGS)
2403 : {
2404 0 : TimestampTz dt1 = PG_GETARG_TIMESTAMPTZ(0);
2405 0 : Timestamp timestampVal = PG_GETARG_TIMESTAMP(1);
2406 :
2407 0 : PG_RETURN_BOOL(timestamp_cmp_timestamptz_internal(timestampVal, dt1) == 0);
2408 : }
2409 :
2410 : Datum
2411 96 : timestamptz_ne_timestamp(PG_FUNCTION_ARGS)
2412 : {
2413 96 : TimestampTz dt1 = PG_GETARG_TIMESTAMPTZ(0);
2414 96 : Timestamp timestampVal = PG_GETARG_TIMESTAMP(1);
2415 :
2416 96 : PG_RETURN_BOOL(timestamp_cmp_timestamptz_internal(timestampVal, dt1) != 0);
2417 : }
2418 :
2419 : Datum
2420 0 : timestamptz_lt_timestamp(PG_FUNCTION_ARGS)
2421 : {
2422 0 : TimestampTz dt1 = PG_GETARG_TIMESTAMPTZ(0);
2423 0 : Timestamp timestampVal = PG_GETARG_TIMESTAMP(1);
2424 :
2425 0 : PG_RETURN_BOOL(timestamp_cmp_timestamptz_internal(timestampVal, dt1) > 0);
2426 : }
2427 :
2428 : Datum
2429 0 : timestamptz_gt_timestamp(PG_FUNCTION_ARGS)
2430 : {
2431 0 : TimestampTz dt1 = PG_GETARG_TIMESTAMPTZ(0);
2432 0 : Timestamp timestampVal = PG_GETARG_TIMESTAMP(1);
2433 :
2434 0 : PG_RETURN_BOOL(timestamp_cmp_timestamptz_internal(timestampVal, dt1) < 0);
2435 : }
2436 :
2437 : Datum
2438 0 : timestamptz_le_timestamp(PG_FUNCTION_ARGS)
2439 : {
2440 0 : TimestampTz dt1 = PG_GETARG_TIMESTAMPTZ(0);
2441 0 : Timestamp timestampVal = PG_GETARG_TIMESTAMP(1);
2442 :
2443 0 : PG_RETURN_BOOL(timestamp_cmp_timestamptz_internal(timestampVal, dt1) >= 0);
2444 : }
2445 :
2446 : Datum
2447 6 : timestamptz_ge_timestamp(PG_FUNCTION_ARGS)
2448 : {
2449 6 : TimestampTz dt1 = PG_GETARG_TIMESTAMPTZ(0);
2450 6 : Timestamp timestampVal = PG_GETARG_TIMESTAMP(1);
2451 :
2452 6 : PG_RETURN_BOOL(timestamp_cmp_timestamptz_internal(timestampVal, dt1) <= 0);
2453 : }
2454 :
2455 : Datum
2456 0 : timestamptz_cmp_timestamp(PG_FUNCTION_ARGS)
2457 : {
2458 0 : TimestampTz dt1 = PG_GETARG_TIMESTAMPTZ(0);
2459 0 : Timestamp timestampVal = PG_GETARG_TIMESTAMP(1);
2460 :
2461 0 : PG_RETURN_INT32(-timestamp_cmp_timestamptz_internal(timestampVal, dt1));
2462 : }
2463 :
2464 :
2465 : /*
2466 : * interval_relop - is interval1 relop interval2
2467 : *
2468 : * Interval comparison is based on converting interval values to a linear
2469 : * representation expressed in the units of the time field (microseconds,
2470 : * in the case of integer timestamps) with days assumed to be always 24 hours
2471 : * and months assumed to be always 30 days. To avoid overflow, we need a
2472 : * wider-than-int64 datatype for the linear representation, so use INT128.
2473 : */
2474 :
2475 : static inline INT128
2476 261872 : interval_cmp_value(const Interval *interval)
2477 : {
2478 : INT128 span;
2479 : int64 days;
2480 :
2481 : /*
2482 : * Combine the month and day fields into an integral number of days.
2483 : * Because the inputs are int32, int64 arithmetic suffices here.
2484 : */
2485 261872 : days = interval->month * INT64CONST(30);
2486 261872 : days += interval->day;
2487 :
2488 : /* Widen time field to 128 bits */
2489 261872 : span = int64_to_int128(interval->time);
2490 :
2491 : /* Scale up days to microseconds, forming a 128-bit product */
2492 261872 : int128_add_int64_mul_int64(&span, days, USECS_PER_DAY);
2493 :
2494 261872 : return span;
2495 : }
2496 :
2497 : static int
2498 127324 : interval_cmp_internal(const Interval *interval1, const Interval *interval2)
2499 : {
2500 127324 : INT128 span1 = interval_cmp_value(interval1);
2501 127324 : INT128 span2 = interval_cmp_value(interval2);
2502 :
2503 127324 : return int128_compare(span1, span2);
2504 : }
2505 :
2506 : static int
2507 4886 : interval_sign(const Interval *interval)
2508 : {
2509 4886 : INT128 span = interval_cmp_value(interval);
2510 4886 : INT128 zero = int64_to_int128(0);
2511 :
2512 4886 : return int128_compare(span, zero);
2513 : }
2514 :
2515 : Datum
2516 15998 : interval_eq(PG_FUNCTION_ARGS)
2517 : {
2518 15998 : Interval *interval1 = PG_GETARG_INTERVAL_P(0);
2519 15998 : Interval *interval2 = PG_GETARG_INTERVAL_P(1);
2520 :
2521 15998 : PG_RETURN_BOOL(interval_cmp_internal(interval1, interval2) == 0);
2522 : }
2523 :
2524 : Datum
2525 108 : interval_ne(PG_FUNCTION_ARGS)
2526 : {
2527 108 : Interval *interval1 = PG_GETARG_INTERVAL_P(0);
2528 108 : Interval *interval2 = PG_GETARG_INTERVAL_P(1);
2529 :
2530 108 : PG_RETURN_BOOL(interval_cmp_internal(interval1, interval2) != 0);
2531 : }
2532 :
2533 : Datum
2534 29538 : interval_lt(PG_FUNCTION_ARGS)
2535 : {
2536 29538 : Interval *interval1 = PG_GETARG_INTERVAL_P(0);
2537 29538 : Interval *interval2 = PG_GETARG_INTERVAL_P(1);
2538 :
2539 29538 : PG_RETURN_BOOL(interval_cmp_internal(interval1, interval2) < 0);
2540 : }
2541 :
2542 : Datum
2543 9948 : interval_gt(PG_FUNCTION_ARGS)
2544 : {
2545 9948 : Interval *interval1 = PG_GETARG_INTERVAL_P(0);
2546 9948 : Interval *interval2 = PG_GETARG_INTERVAL_P(1);
2547 :
2548 9948 : PG_RETURN_BOOL(interval_cmp_internal(interval1, interval2) > 0);
2549 : }
2550 :
2551 : Datum
2552 6358 : interval_le(PG_FUNCTION_ARGS)
2553 : {
2554 6358 : Interval *interval1 = PG_GETARG_INTERVAL_P(0);
2555 6358 : Interval *interval2 = PG_GETARG_INTERVAL_P(1);
2556 :
2557 6358 : PG_RETURN_BOOL(interval_cmp_internal(interval1, interval2) <= 0);
2558 : }
2559 :
2560 : Datum
2561 5884 : interval_ge(PG_FUNCTION_ARGS)
2562 : {
2563 5884 : Interval *interval1 = PG_GETARG_INTERVAL_P(0);
2564 5884 : Interval *interval2 = PG_GETARG_INTERVAL_P(1);
2565 :
2566 5884 : PG_RETURN_BOOL(interval_cmp_internal(interval1, interval2) >= 0);
2567 : }
2568 :
2569 : Datum
2570 58602 : interval_cmp(PG_FUNCTION_ARGS)
2571 : {
2572 58602 : Interval *interval1 = PG_GETARG_INTERVAL_P(0);
2573 58602 : Interval *interval2 = PG_GETARG_INTERVAL_P(1);
2574 :
2575 58602 : PG_RETURN_INT32(interval_cmp_internal(interval1, interval2));
2576 : }
2577 :
2578 : /*
2579 : * Hashing for intervals
2580 : *
2581 : * We must produce equal hashvals for values that interval_cmp_internal()
2582 : * considers equal. So, compute the net span the same way it does,
2583 : * and then hash that.
2584 : */
2585 : Datum
2586 2278 : interval_hash(PG_FUNCTION_ARGS)
2587 : {
2588 2278 : Interval *interval = PG_GETARG_INTERVAL_P(0);
2589 2278 : INT128 span = interval_cmp_value(interval);
2590 : int64 span64;
2591 :
2592 : /*
2593 : * Use only the least significant 64 bits for hashing. The upper 64 bits
2594 : * seldom add any useful information, and besides we must do it like this
2595 : * for compatibility with hashes calculated before use of INT128 was
2596 : * introduced.
2597 : */
2598 2278 : span64 = int128_to_int64(span);
2599 :
2600 2278 : return DirectFunctionCall1(hashint8, Int64GetDatumFast(span64));
2601 : }
2602 :
2603 : Datum
2604 60 : interval_hash_extended(PG_FUNCTION_ARGS)
2605 : {
2606 60 : Interval *interval = PG_GETARG_INTERVAL_P(0);
2607 60 : INT128 span = interval_cmp_value(interval);
2608 : int64 span64;
2609 :
2610 : /* Same approach as interval_hash */
2611 60 : span64 = int128_to_int64(span);
2612 :
2613 60 : return DirectFunctionCall2(hashint8extended, Int64GetDatumFast(span64),
2614 : PG_GETARG_DATUM(1));
2615 : }
2616 :
2617 : /* overlaps_timestamp() --- implements the SQL OVERLAPS operator.
2618 : *
2619 : * Algorithm is per SQL spec. This is much harder than you'd think
2620 : * because the spec requires us to deliver a non-null answer in some cases
2621 : * where some of the inputs are null.
2622 : */
2623 : Datum
2624 72 : overlaps_timestamp(PG_FUNCTION_ARGS)
2625 : {
2626 : /*
2627 : * The arguments are Timestamps, but we leave them as generic Datums to
2628 : * avoid unnecessary conversions between value and reference forms --- not
2629 : * to mention possible dereferences of null pointers.
2630 : */
2631 72 : Datum ts1 = PG_GETARG_DATUM(0);
2632 72 : Datum te1 = PG_GETARG_DATUM(1);
2633 72 : Datum ts2 = PG_GETARG_DATUM(2);
2634 72 : Datum te2 = PG_GETARG_DATUM(3);
2635 72 : bool ts1IsNull = PG_ARGISNULL(0);
2636 72 : bool te1IsNull = PG_ARGISNULL(1);
2637 72 : bool ts2IsNull = PG_ARGISNULL(2);
2638 72 : bool te2IsNull = PG_ARGISNULL(3);
2639 :
2640 : #define TIMESTAMP_GT(t1,t2) \
2641 : DatumGetBool(DirectFunctionCall2(timestamp_gt,t1,t2))
2642 : #define TIMESTAMP_LT(t1,t2) \
2643 : DatumGetBool(DirectFunctionCall2(timestamp_lt,t1,t2))
2644 :
2645 : /*
2646 : * If both endpoints of interval 1 are null, the result is null (unknown).
2647 : * If just one endpoint is null, take ts1 as the non-null one. Otherwise,
2648 : * take ts1 as the lesser endpoint.
2649 : */
2650 72 : if (ts1IsNull)
2651 : {
2652 0 : if (te1IsNull)
2653 0 : PG_RETURN_NULL();
2654 : /* swap null for non-null */
2655 0 : ts1 = te1;
2656 0 : te1IsNull = true;
2657 : }
2658 72 : else if (!te1IsNull)
2659 : {
2660 72 : if (TIMESTAMP_GT(ts1, te1))
2661 : {
2662 0 : Datum tt = ts1;
2663 :
2664 0 : ts1 = te1;
2665 0 : te1 = tt;
2666 : }
2667 : }
2668 :
2669 : /* Likewise for interval 2. */
2670 72 : if (ts2IsNull)
2671 : {
2672 0 : if (te2IsNull)
2673 0 : PG_RETURN_NULL();
2674 : /* swap null for non-null */
2675 0 : ts2 = te2;
2676 0 : te2IsNull = true;
2677 : }
2678 72 : else if (!te2IsNull)
2679 : {
2680 72 : if (TIMESTAMP_GT(ts2, te2))
2681 : {
2682 0 : Datum tt = ts2;
2683 :
2684 0 : ts2 = te2;
2685 0 : te2 = tt;
2686 : }
2687 : }
2688 :
2689 : /*
2690 : * At this point neither ts1 nor ts2 is null, so we can consider three
2691 : * cases: ts1 > ts2, ts1 < ts2, ts1 = ts2
2692 : */
2693 72 : if (TIMESTAMP_GT(ts1, ts2))
2694 : {
2695 : /*
2696 : * This case is ts1 < te2 OR te1 < te2, which may look redundant but
2697 : * in the presence of nulls it's not quite completely so.
2698 : */
2699 0 : if (te2IsNull)
2700 0 : PG_RETURN_NULL();
2701 0 : if (TIMESTAMP_LT(ts1, te2))
2702 0 : PG_RETURN_BOOL(true);
2703 0 : if (te1IsNull)
2704 0 : PG_RETURN_NULL();
2705 :
2706 : /*
2707 : * If te1 is not null then we had ts1 <= te1 above, and we just found
2708 : * ts1 >= te2, hence te1 >= te2.
2709 : */
2710 0 : PG_RETURN_BOOL(false);
2711 : }
2712 72 : else if (TIMESTAMP_LT(ts1, ts2))
2713 : {
2714 : /* This case is ts2 < te1 OR te2 < te1 */
2715 60 : if (te1IsNull)
2716 0 : PG_RETURN_NULL();
2717 60 : if (TIMESTAMP_LT(ts2, te1))
2718 24 : PG_RETURN_BOOL(true);
2719 36 : if (te2IsNull)
2720 0 : PG_RETURN_NULL();
2721 :
2722 : /*
2723 : * If te2 is not null then we had ts2 <= te2 above, and we just found
2724 : * ts2 >= te1, hence te2 >= te1.
2725 : */
2726 36 : PG_RETURN_BOOL(false);
2727 : }
2728 : else
2729 : {
2730 : /*
2731 : * For ts1 = ts2 the spec says te1 <> te2 OR te1 = te2, which is a
2732 : * rather silly way of saying "true if both are non-null, else null".
2733 : */
2734 12 : if (te1IsNull || te2IsNull)
2735 0 : PG_RETURN_NULL();
2736 12 : PG_RETURN_BOOL(true);
2737 : }
2738 :
2739 : #undef TIMESTAMP_GT
2740 : #undef TIMESTAMP_LT
2741 : }
2742 :
2743 :
2744 : /*----------------------------------------------------------
2745 : * "Arithmetic" operators on date/times.
2746 : *---------------------------------------------------------*/
2747 :
2748 : Datum
2749 0 : timestamp_smaller(PG_FUNCTION_ARGS)
2750 : {
2751 0 : Timestamp dt1 = PG_GETARG_TIMESTAMP(0);
2752 0 : Timestamp dt2 = PG_GETARG_TIMESTAMP(1);
2753 : Timestamp result;
2754 :
2755 : /* use timestamp_cmp_internal to be sure this agrees with comparisons */
2756 0 : if (timestamp_cmp_internal(dt1, dt2) < 0)
2757 0 : result = dt1;
2758 : else
2759 0 : result = dt2;
2760 0 : PG_RETURN_TIMESTAMP(result);
2761 : }
2762 :
2763 : Datum
2764 84 : timestamp_larger(PG_FUNCTION_ARGS)
2765 : {
2766 84 : Timestamp dt1 = PG_GETARG_TIMESTAMP(0);
2767 84 : Timestamp dt2 = PG_GETARG_TIMESTAMP(1);
2768 : Timestamp result;
2769 :
2770 84 : if (timestamp_cmp_internal(dt1, dt2) > 0)
2771 0 : result = dt1;
2772 : else
2773 84 : result = dt2;
2774 84 : PG_RETURN_TIMESTAMP(result);
2775 : }
2776 :
2777 :
2778 : Datum
2779 6072 : timestamp_mi(PG_FUNCTION_ARGS)
2780 : {
2781 6072 : Timestamp dt1 = PG_GETARG_TIMESTAMP(0);
2782 6072 : Timestamp dt2 = PG_GETARG_TIMESTAMP(1);
2783 : Interval *result;
2784 :
2785 6072 : result = (Interval *) palloc(sizeof(Interval));
2786 :
2787 : /*
2788 : * Handle infinities.
2789 : *
2790 : * We treat anything that amounts to "infinity - infinity" as an error,
2791 : * since the interval type has nothing equivalent to NaN.
2792 : */
2793 6072 : if (TIMESTAMP_NOT_FINITE(dt1) || TIMESTAMP_NOT_FINITE(dt2))
2794 : {
2795 84 : if (TIMESTAMP_IS_NOBEGIN(dt1))
2796 : {
2797 36 : if (TIMESTAMP_IS_NOBEGIN(dt2))
2798 12 : ereport(ERROR,
2799 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
2800 : errmsg("interval out of range")));
2801 : else
2802 24 : INTERVAL_NOBEGIN(result);
2803 : }
2804 48 : else if (TIMESTAMP_IS_NOEND(dt1))
2805 : {
2806 48 : if (TIMESTAMP_IS_NOEND(dt2))
2807 12 : ereport(ERROR,
2808 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
2809 : errmsg("interval out of range")));
2810 : else
2811 36 : INTERVAL_NOEND(result);
2812 : }
2813 0 : else if (TIMESTAMP_IS_NOBEGIN(dt2))
2814 0 : INTERVAL_NOEND(result);
2815 : else /* TIMESTAMP_IS_NOEND(dt2) */
2816 0 : INTERVAL_NOBEGIN(result);
2817 :
2818 60 : PG_RETURN_INTERVAL_P(result);
2819 : }
2820 :
2821 5988 : if (unlikely(pg_sub_s64_overflow(dt1, dt2, &result->time)))
2822 12 : ereport(ERROR,
2823 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
2824 : errmsg("interval out of range")));
2825 :
2826 5976 : result->month = 0;
2827 5976 : result->day = 0;
2828 :
2829 : /*----------
2830 : * This is wrong, but removing it breaks a lot of regression tests.
2831 : * For example:
2832 : *
2833 : * test=> SET timezone = 'EST5EDT';
2834 : * test=> SELECT
2835 : * test-> ('2005-10-30 13:22:00-05'::timestamptz -
2836 : * test(> '2005-10-29 13:22:00-04'::timestamptz);
2837 : * ?column?
2838 : * ----------------
2839 : * 1 day 01:00:00
2840 : * (1 row)
2841 : *
2842 : * so adding that to the first timestamp gets:
2843 : *
2844 : * test=> SELECT
2845 : * test-> ('2005-10-29 13:22:00-04'::timestamptz +
2846 : * test(> ('2005-10-30 13:22:00-05'::timestamptz -
2847 : * test(> '2005-10-29 13:22:00-04'::timestamptz)) at time zone 'EST';
2848 : * timezone
2849 : * --------------------
2850 : * 2005-10-30 14:22:00
2851 : * (1 row)
2852 : *----------
2853 : */
2854 5976 : result = DatumGetIntervalP(DirectFunctionCall1(interval_justify_hours,
2855 : IntervalPGetDatum(result)));
2856 :
2857 5976 : PG_RETURN_INTERVAL_P(result);
2858 : }
2859 :
2860 : /*
2861 : * interval_justify_interval()
2862 : *
2863 : * Adjust interval so 'month', 'day', and 'time' portions are within
2864 : * customary bounds. Specifically:
2865 : *
2866 : * 0 <= abs(time) < 24 hours
2867 : * 0 <= abs(day) < 30 days
2868 : *
2869 : * Also, the sign bit on all three fields is made equal, so either
2870 : * all three fields are negative or all are positive.
2871 : */
2872 : Datum
2873 66 : interval_justify_interval(PG_FUNCTION_ARGS)
2874 : {
2875 66 : Interval *span = PG_GETARG_INTERVAL_P(0);
2876 : Interval *result;
2877 : TimeOffset wholeday;
2878 : int32 wholemonth;
2879 :
2880 66 : result = (Interval *) palloc(sizeof(Interval));
2881 66 : result->month = span->month;
2882 66 : result->day = span->day;
2883 66 : result->time = span->time;
2884 :
2885 : /* do nothing for infinite intervals */
2886 66 : if (INTERVAL_NOT_FINITE(result))
2887 12 : PG_RETURN_INTERVAL_P(result);
2888 :
2889 : /* pre-justify days if it might prevent overflow */
2890 54 : if ((result->day > 0 && result->time > 0) ||
2891 48 : (result->day < 0 && result->time < 0))
2892 : {
2893 12 : wholemonth = result->day / DAYS_PER_MONTH;
2894 12 : result->day -= wholemonth * DAYS_PER_MONTH;
2895 12 : if (pg_add_s32_overflow(result->month, wholemonth, &result->month))
2896 0 : ereport(ERROR,
2897 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
2898 : errmsg("interval out of range")));
2899 : }
2900 :
2901 : /*
2902 : * Since TimeOffset is int64, abs(wholeday) can't exceed about 1.07e8. If
2903 : * we pre-justified then abs(result->day) is less than DAYS_PER_MONTH, so
2904 : * this addition can't overflow. If we didn't pre-justify, then day and
2905 : * time are of different signs, so it still can't overflow.
2906 : */
2907 54 : TMODULO(result->time, wholeday, USECS_PER_DAY);
2908 54 : result->day += wholeday;
2909 :
2910 54 : wholemonth = result->day / DAYS_PER_MONTH;
2911 54 : result->day -= wholemonth * DAYS_PER_MONTH;
2912 54 : if (pg_add_s32_overflow(result->month, wholemonth, &result->month))
2913 24 : ereport(ERROR,
2914 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
2915 : errmsg("interval out of range")));
2916 :
2917 30 : if (result->month > 0 &&
2918 18 : (result->day < 0 || (result->day == 0 && result->time < 0)))
2919 : {
2920 6 : result->day += DAYS_PER_MONTH;
2921 6 : result->month--;
2922 : }
2923 24 : else if (result->month < 0 &&
2924 12 : (result->day > 0 || (result->day == 0 && result->time > 0)))
2925 : {
2926 0 : result->day -= DAYS_PER_MONTH;
2927 0 : result->month++;
2928 : }
2929 :
2930 30 : if (result->day > 0 && result->time < 0)
2931 : {
2932 6 : result->time += USECS_PER_DAY;
2933 6 : result->day--;
2934 : }
2935 24 : else if (result->day < 0 && result->time > 0)
2936 : {
2937 0 : result->time -= USECS_PER_DAY;
2938 0 : result->day++;
2939 : }
2940 :
2941 30 : PG_RETURN_INTERVAL_P(result);
2942 : }
2943 :
2944 : /*
2945 : * interval_justify_hours()
2946 : *
2947 : * Adjust interval so 'time' contains less than a whole day, adding
2948 : * the excess to 'day'. This is useful for
2949 : * situations (such as non-TZ) where '1 day' = '24 hours' is valid,
2950 : * e.g. interval subtraction and division.
2951 : */
2952 : Datum
2953 7980 : interval_justify_hours(PG_FUNCTION_ARGS)
2954 : {
2955 7980 : Interval *span = PG_GETARG_INTERVAL_P(0);
2956 : Interval *result;
2957 : TimeOffset wholeday;
2958 :
2959 7980 : result = (Interval *) palloc(sizeof(Interval));
2960 7980 : result->month = span->month;
2961 7980 : result->day = span->day;
2962 7980 : result->time = span->time;
2963 :
2964 : /* do nothing for infinite intervals */
2965 7980 : if (INTERVAL_NOT_FINITE(result))
2966 12 : PG_RETURN_INTERVAL_P(result);
2967 :
2968 7968 : TMODULO(result->time, wholeday, USECS_PER_DAY);
2969 7968 : if (pg_add_s32_overflow(result->day, wholeday, &result->day))
2970 6 : ereport(ERROR,
2971 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
2972 : errmsg("interval out of range")));
2973 :
2974 7962 : if (result->day > 0 && result->time < 0)
2975 : {
2976 0 : result->time += USECS_PER_DAY;
2977 0 : result->day--;
2978 : }
2979 7962 : else if (result->day < 0 && result->time > 0)
2980 : {
2981 0 : result->time -= USECS_PER_DAY;
2982 0 : result->day++;
2983 : }
2984 :
2985 7962 : PG_RETURN_INTERVAL_P(result);
2986 : }
2987 :
2988 : /*
2989 : * interval_justify_days()
2990 : *
2991 : * Adjust interval so 'day' contains less than 30 days, adding
2992 : * the excess to 'month'.
2993 : */
2994 : Datum
2995 2004 : interval_justify_days(PG_FUNCTION_ARGS)
2996 : {
2997 2004 : Interval *span = PG_GETARG_INTERVAL_P(0);
2998 : Interval *result;
2999 : int32 wholemonth;
3000 :
3001 2004 : result = (Interval *) palloc(sizeof(Interval));
3002 2004 : result->month = span->month;
3003 2004 : result->day = span->day;
3004 2004 : result->time = span->time;
3005 :
3006 : /* do nothing for infinite intervals */
3007 2004 : if (INTERVAL_NOT_FINITE(result))
3008 12 : PG_RETURN_INTERVAL_P(result);
3009 :
3010 1992 : wholemonth = result->day / DAYS_PER_MONTH;
3011 1992 : result->day -= wholemonth * DAYS_PER_MONTH;
3012 1992 : if (pg_add_s32_overflow(result->month, wholemonth, &result->month))
3013 6 : ereport(ERROR,
3014 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
3015 : errmsg("interval out of range")));
3016 :
3017 1986 : if (result->month > 0 && result->day < 0)
3018 : {
3019 0 : result->day += DAYS_PER_MONTH;
3020 0 : result->month--;
3021 : }
3022 1986 : else if (result->month < 0 && result->day > 0)
3023 : {
3024 0 : result->day -= DAYS_PER_MONTH;
3025 0 : result->month++;
3026 : }
3027 :
3028 1986 : PG_RETURN_INTERVAL_P(result);
3029 : }
3030 :
3031 : /* timestamp_pl_interval()
3032 : * Add an interval to a timestamp data type.
3033 : * Note that interval has provisions for qualitative year/month and day
3034 : * units, so try to do the right thing with them.
3035 : * To add a month, increment the month, and use the same day of month.
3036 : * Then, if the next month has fewer days, set the day of month
3037 : * to the last day of month.
3038 : * To add a day, increment the mday, and use the same time of day.
3039 : * Lastly, add in the "quantitative time".
3040 : */
3041 : Datum
3042 9782 : timestamp_pl_interval(PG_FUNCTION_ARGS)
3043 : {
3044 9782 : Timestamp timestamp = PG_GETARG_TIMESTAMP(0);
3045 9782 : Interval *span = PG_GETARG_INTERVAL_P(1);
3046 : Timestamp result;
3047 :
3048 : /*
3049 : * Handle infinities.
3050 : *
3051 : * We treat anything that amounts to "infinity - infinity" as an error,
3052 : * since the timestamp type has nothing equivalent to NaN.
3053 : */
3054 9782 : if (INTERVAL_IS_NOBEGIN(span))
3055 : {
3056 276 : if (TIMESTAMP_IS_NOEND(timestamp))
3057 24 : ereport(ERROR,
3058 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
3059 : errmsg("timestamp out of range")));
3060 : else
3061 252 : TIMESTAMP_NOBEGIN(result);
3062 : }
3063 9506 : else if (INTERVAL_IS_NOEND(span))
3064 : {
3065 204 : if (TIMESTAMP_IS_NOBEGIN(timestamp))
3066 24 : ereport(ERROR,
3067 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
3068 : errmsg("timestamp out of range")));
3069 : else
3070 180 : TIMESTAMP_NOEND(result);
3071 : }
3072 9302 : else if (TIMESTAMP_NOT_FINITE(timestamp))
3073 114 : result = timestamp;
3074 : else
3075 : {
3076 9188 : if (span->month != 0)
3077 : {
3078 : struct pg_tm tt,
3079 2628 : *tm = &tt;
3080 : fsec_t fsec;
3081 :
3082 2628 : if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL, NULL) != 0)
3083 0 : ereport(ERROR,
3084 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
3085 : errmsg("timestamp out of range")));
3086 :
3087 2628 : if (pg_add_s32_overflow(tm->tm_mon, span->month, &tm->tm_mon))
3088 0 : ereport(ERROR,
3089 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
3090 : errmsg("timestamp out of range")));
3091 2628 : if (tm->tm_mon > MONTHS_PER_YEAR)
3092 : {
3093 1398 : tm->tm_year += (tm->tm_mon - 1) / MONTHS_PER_YEAR;
3094 1398 : tm->tm_mon = ((tm->tm_mon - 1) % MONTHS_PER_YEAR) + 1;
3095 : }
3096 1230 : else if (tm->tm_mon < 1)
3097 : {
3098 1170 : tm->tm_year += tm->tm_mon / MONTHS_PER_YEAR - 1;
3099 1170 : tm->tm_mon = tm->tm_mon % MONTHS_PER_YEAR + MONTHS_PER_YEAR;
3100 : }
3101 :
3102 : /* adjust for end of month boundary problems... */
3103 2628 : if (tm->tm_mday > day_tab[isleap(tm->tm_year)][tm->tm_mon - 1])
3104 12 : tm->tm_mday = (day_tab[isleap(tm->tm_year)][tm->tm_mon - 1]);
3105 :
3106 2628 : if (tm2timestamp(tm, fsec, NULL, ×tamp) != 0)
3107 0 : ereport(ERROR,
3108 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
3109 : errmsg("timestamp out of range")));
3110 : }
3111 :
3112 9188 : if (span->day != 0)
3113 : {
3114 : struct pg_tm tt,
3115 3084 : *tm = &tt;
3116 : fsec_t fsec;
3117 : int julian;
3118 :
3119 3084 : if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL, NULL) != 0)
3120 0 : ereport(ERROR,
3121 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
3122 : errmsg("timestamp out of range")));
3123 :
3124 : /*
3125 : * Add days by converting to and from Julian. We need an overflow
3126 : * check here since j2date expects a non-negative integer input.
3127 : */
3128 3084 : julian = date2j(tm->tm_year, tm->tm_mon, tm->tm_mday);
3129 3084 : if (pg_add_s32_overflow(julian, span->day, &julian) ||
3130 3084 : julian < 0)
3131 6 : ereport(ERROR,
3132 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
3133 : errmsg("timestamp out of range")));
3134 3078 : j2date(julian, &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
3135 :
3136 3078 : if (tm2timestamp(tm, fsec, NULL, ×tamp) != 0)
3137 0 : ereport(ERROR,
3138 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
3139 : errmsg("timestamp out of range")));
3140 : }
3141 :
3142 9182 : if (pg_add_s64_overflow(timestamp, span->time, ×tamp))
3143 6 : ereport(ERROR,
3144 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
3145 : errmsg("timestamp out of range")));
3146 :
3147 9176 : if (!IS_VALID_TIMESTAMP(timestamp))
3148 0 : ereport(ERROR,
3149 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
3150 : errmsg("timestamp out of range")));
3151 :
3152 9176 : result = timestamp;
3153 : }
3154 :
3155 9722 : PG_RETURN_TIMESTAMP(result);
3156 : }
3157 :
3158 : Datum
3159 2172 : timestamp_mi_interval(PG_FUNCTION_ARGS)
3160 : {
3161 2172 : Timestamp timestamp = PG_GETARG_TIMESTAMP(0);
3162 2172 : Interval *span = PG_GETARG_INTERVAL_P(1);
3163 : Interval tspan;
3164 :
3165 2172 : interval_um_internal(span, &tspan);
3166 :
3167 2172 : return DirectFunctionCall2(timestamp_pl_interval,
3168 : TimestampGetDatum(timestamp),
3169 : PointerGetDatum(&tspan));
3170 : }
3171 :
3172 :
3173 : /* timestamptz_pl_interval_internal()
3174 : * Add an interval to a timestamptz, in the given (or session) timezone.
3175 : *
3176 : * Note that interval has provisions for qualitative year/month and day
3177 : * units, so try to do the right thing with them.
3178 : * To add a month, increment the month, and use the same day of month.
3179 : * Then, if the next month has fewer days, set the day of month
3180 : * to the last day of month.
3181 : * To add a day, increment the mday, and use the same time of day.
3182 : * Lastly, add in the "quantitative time".
3183 : */
3184 : static TimestampTz
3185 98476 : timestamptz_pl_interval_internal(TimestampTz timestamp,
3186 : Interval *span,
3187 : pg_tz *attimezone)
3188 : {
3189 : TimestampTz result;
3190 : int tz;
3191 :
3192 : /*
3193 : * Handle infinities.
3194 : *
3195 : * We treat anything that amounts to "infinity - infinity" as an error,
3196 : * since the timestamptz type has nothing equivalent to NaN.
3197 : */
3198 98476 : if (INTERVAL_IS_NOBEGIN(span))
3199 : {
3200 432 : if (TIMESTAMP_IS_NOEND(timestamp))
3201 12 : ereport(ERROR,
3202 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
3203 : errmsg("timestamp out of range")));
3204 : else
3205 420 : TIMESTAMP_NOBEGIN(result);
3206 : }
3207 98044 : else if (INTERVAL_IS_NOEND(span))
3208 : {
3209 360 : if (TIMESTAMP_IS_NOBEGIN(timestamp))
3210 12 : ereport(ERROR,
3211 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
3212 : errmsg("timestamp out of range")));
3213 : else
3214 348 : TIMESTAMP_NOEND(result);
3215 : }
3216 97684 : else if (TIMESTAMP_NOT_FINITE(timestamp))
3217 120 : result = timestamp;
3218 : else
3219 : {
3220 : /* Use session timezone if caller asks for default */
3221 97564 : if (attimezone == NULL)
3222 34956 : attimezone = session_timezone;
3223 :
3224 97564 : if (span->month != 0)
3225 : {
3226 : struct pg_tm tt,
3227 2340 : *tm = &tt;
3228 : fsec_t fsec;
3229 :
3230 2340 : if (timestamp2tm(timestamp, &tz, tm, &fsec, NULL, attimezone) != 0)
3231 0 : ereport(ERROR,
3232 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
3233 : errmsg("timestamp out of range")));
3234 :
3235 2340 : if (pg_add_s32_overflow(tm->tm_mon, span->month, &tm->tm_mon))
3236 0 : ereport(ERROR,
3237 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
3238 : errmsg("timestamp out of range")));
3239 2340 : if (tm->tm_mon > MONTHS_PER_YEAR)
3240 : {
3241 894 : tm->tm_year += (tm->tm_mon - 1) / MONTHS_PER_YEAR;
3242 894 : tm->tm_mon = ((tm->tm_mon - 1) % MONTHS_PER_YEAR) + 1;
3243 : }
3244 1446 : else if (tm->tm_mon < 1)
3245 : {
3246 1020 : tm->tm_year += tm->tm_mon / MONTHS_PER_YEAR - 1;
3247 1020 : tm->tm_mon = tm->tm_mon % MONTHS_PER_YEAR + MONTHS_PER_YEAR;
3248 : }
3249 :
3250 : /* adjust for end of month boundary problems... */
3251 2340 : if (tm->tm_mday > day_tab[isleap(tm->tm_year)][tm->tm_mon - 1])
3252 54 : tm->tm_mday = (day_tab[isleap(tm->tm_year)][tm->tm_mon - 1]);
3253 :
3254 2340 : tz = DetermineTimeZoneOffset(tm, attimezone);
3255 :
3256 2340 : if (tm2timestamp(tm, fsec, &tz, ×tamp) != 0)
3257 0 : ereport(ERROR,
3258 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
3259 : errmsg("timestamp out of range")));
3260 : }
3261 :
3262 97564 : if (span->day != 0)
3263 : {
3264 : struct pg_tm tt,
3265 3654 : *tm = &tt;
3266 : fsec_t fsec;
3267 : int julian;
3268 :
3269 3654 : if (timestamp2tm(timestamp, &tz, tm, &fsec, NULL, attimezone) != 0)
3270 0 : ereport(ERROR,
3271 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
3272 : errmsg("timestamp out of range")));
3273 :
3274 : /*
3275 : * Add days by converting to and from Julian. We need an overflow
3276 : * check here since j2date expects a non-negative integer input.
3277 : * In practice though, it will give correct answers for small
3278 : * negative Julian dates; we should allow -1 to avoid
3279 : * timezone-dependent failures, as discussed in timestamp.h.
3280 : */
3281 3654 : julian = date2j(tm->tm_year, tm->tm_mon, tm->tm_mday);
3282 3654 : if (pg_add_s32_overflow(julian, span->day, &julian) ||
3283 3654 : julian < -1)
3284 6 : ereport(ERROR,
3285 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
3286 : errmsg("timestamp out of range")));
3287 3648 : j2date(julian, &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
3288 :
3289 3648 : tz = DetermineTimeZoneOffset(tm, attimezone);
3290 :
3291 3648 : if (tm2timestamp(tm, fsec, &tz, ×tamp) != 0)
3292 0 : ereport(ERROR,
3293 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
3294 : errmsg("timestamp out of range")));
3295 : }
3296 :
3297 97558 : if (pg_add_s64_overflow(timestamp, span->time, ×tamp))
3298 6 : ereport(ERROR,
3299 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
3300 : errmsg("timestamp out of range")));
3301 :
3302 97552 : if (!IS_VALID_TIMESTAMP(timestamp))
3303 0 : ereport(ERROR,
3304 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
3305 : errmsg("timestamp out of range")));
3306 :
3307 97552 : result = timestamp;
3308 : }
3309 :
3310 98440 : return result;
3311 : }
3312 :
3313 : /* timestamptz_mi_interval_internal()
3314 : * As above, but subtract the interval.
3315 : */
3316 : static TimestampTz
3317 2118 : timestamptz_mi_interval_internal(TimestampTz timestamp,
3318 : Interval *span,
3319 : pg_tz *attimezone)
3320 : {
3321 : Interval tspan;
3322 :
3323 2118 : interval_um_internal(span, &tspan);
3324 :
3325 2118 : return timestamptz_pl_interval_internal(timestamp, &tspan, attimezone);
3326 : }
3327 :
3328 : /* timestamptz_pl_interval()
3329 : * Add an interval to a timestamptz, in the session timezone.
3330 : */
3331 : Datum
3332 33342 : timestamptz_pl_interval(PG_FUNCTION_ARGS)
3333 : {
3334 33342 : TimestampTz timestamp = PG_GETARG_TIMESTAMPTZ(0);
3335 33342 : Interval *span = PG_GETARG_INTERVAL_P(1);
3336 :
3337 33342 : PG_RETURN_TIMESTAMP(timestamptz_pl_interval_internal(timestamp, span, NULL));
3338 : }
3339 :
3340 : Datum
3341 1632 : timestamptz_mi_interval(PG_FUNCTION_ARGS)
3342 : {
3343 1632 : TimestampTz timestamp = PG_GETARG_TIMESTAMPTZ(0);
3344 1632 : Interval *span = PG_GETARG_INTERVAL_P(1);
3345 :
3346 1632 : PG_RETURN_TIMESTAMP(timestamptz_mi_interval_internal(timestamp, span, NULL));
3347 : }
3348 :
3349 : /* timestamptz_pl_interval_at_zone()
3350 : * Add an interval to a timestamptz, in the specified timezone.
3351 : */
3352 : Datum
3353 6 : timestamptz_pl_interval_at_zone(PG_FUNCTION_ARGS)
3354 : {
3355 6 : TimestampTz timestamp = PG_GETARG_TIMESTAMPTZ(0);
3356 6 : Interval *span = PG_GETARG_INTERVAL_P(1);
3357 6 : text *zone = PG_GETARG_TEXT_PP(2);
3358 6 : pg_tz *attimezone = lookup_timezone(zone);
3359 :
3360 6 : PG_RETURN_TIMESTAMP(timestamptz_pl_interval_internal(timestamp, span, attimezone));
3361 : }
3362 :
3363 : Datum
3364 6 : timestamptz_mi_interval_at_zone(PG_FUNCTION_ARGS)
3365 : {
3366 6 : TimestampTz timestamp = PG_GETARG_TIMESTAMPTZ(0);
3367 6 : Interval *span = PG_GETARG_INTERVAL_P(1);
3368 6 : text *zone = PG_GETARG_TEXT_PP(2);
3369 6 : pg_tz *attimezone = lookup_timezone(zone);
3370 :
3371 6 : PG_RETURN_TIMESTAMP(timestamptz_mi_interval_internal(timestamp, span, attimezone));
3372 : }
3373 :
3374 : /* interval_um_internal()
3375 : * Negate an interval.
3376 : */
3377 : static void
3378 8040 : interval_um_internal(const Interval *interval, Interval *result)
3379 : {
3380 8040 : if (INTERVAL_IS_NOBEGIN(interval))
3381 270 : INTERVAL_NOEND(result);
3382 7770 : else if (INTERVAL_IS_NOEND(interval))
3383 678 : INTERVAL_NOBEGIN(result);
3384 : else
3385 : {
3386 : /* Negate each field, guarding against overflow */
3387 14178 : if (pg_sub_s64_overflow(INT64CONST(0), interval->time, &result->time) ||
3388 14166 : pg_sub_s32_overflow(0, interval->day, &result->day) ||
3389 7080 : pg_sub_s32_overflow(0, interval->month, &result->month) ||
3390 7074 : INTERVAL_NOT_FINITE(result))
3391 30 : ereport(ERROR,
3392 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
3393 : errmsg("interval out of range")));
3394 : }
3395 8010 : }
3396 :
3397 : Datum
3398 3714 : interval_um(PG_FUNCTION_ARGS)
3399 : {
3400 3714 : Interval *interval = PG_GETARG_INTERVAL_P(0);
3401 : Interval *result;
3402 :
3403 3714 : result = (Interval *) palloc(sizeof(Interval));
3404 3714 : interval_um_internal(interval, result);
3405 :
3406 3684 : PG_RETURN_INTERVAL_P(result);
3407 : }
3408 :
3409 :
3410 : Datum
3411 0 : interval_smaller(PG_FUNCTION_ARGS)
3412 : {
3413 0 : Interval *interval1 = PG_GETARG_INTERVAL_P(0);
3414 0 : Interval *interval2 = PG_GETARG_INTERVAL_P(1);
3415 : Interval *result;
3416 :
3417 : /* use interval_cmp_internal to be sure this agrees with comparisons */
3418 0 : if (interval_cmp_internal(interval1, interval2) < 0)
3419 0 : result = interval1;
3420 : else
3421 0 : result = interval2;
3422 0 : PG_RETURN_INTERVAL_P(result);
3423 : }
3424 :
3425 : Datum
3426 0 : interval_larger(PG_FUNCTION_ARGS)
3427 : {
3428 0 : Interval *interval1 = PG_GETARG_INTERVAL_P(0);
3429 0 : Interval *interval2 = PG_GETARG_INTERVAL_P(1);
3430 : Interval *result;
3431 :
3432 0 : if (interval_cmp_internal(interval1, interval2) > 0)
3433 0 : result = interval1;
3434 : else
3435 0 : result = interval2;
3436 0 : PG_RETURN_INTERVAL_P(result);
3437 : }
3438 :
3439 : static void
3440 528 : finite_interval_pl(const Interval *span1, const Interval *span2, Interval *result)
3441 : {
3442 : Assert(!INTERVAL_NOT_FINITE(span1));
3443 : Assert(!INTERVAL_NOT_FINITE(span2));
3444 :
3445 1056 : if (pg_add_s32_overflow(span1->month, span2->month, &result->month) ||
3446 1056 : pg_add_s32_overflow(span1->day, span2->day, &result->day) ||
3447 528 : pg_add_s64_overflow(span1->time, span2->time, &result->time) ||
3448 528 : INTERVAL_NOT_FINITE(result))
3449 12 : ereport(ERROR,
3450 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
3451 : errmsg("interval out of range")));
3452 516 : }
3453 :
3454 : Datum
3455 558 : interval_pl(PG_FUNCTION_ARGS)
3456 : {
3457 558 : Interval *span1 = PG_GETARG_INTERVAL_P(0);
3458 558 : Interval *span2 = PG_GETARG_INTERVAL_P(1);
3459 : Interval *result;
3460 :
3461 558 : result = (Interval *) palloc(sizeof(Interval));
3462 :
3463 : /*
3464 : * Handle infinities.
3465 : *
3466 : * We treat anything that amounts to "infinity - infinity" as an error,
3467 : * since the interval type has nothing equivalent to NaN.
3468 : */
3469 558 : if (INTERVAL_IS_NOBEGIN(span1))
3470 : {
3471 54 : if (INTERVAL_IS_NOEND(span2))
3472 6 : ereport(ERROR,
3473 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
3474 : errmsg("interval out of range")));
3475 : else
3476 48 : INTERVAL_NOBEGIN(result);
3477 : }
3478 504 : else if (INTERVAL_IS_NOEND(span1))
3479 : {
3480 42 : if (INTERVAL_IS_NOBEGIN(span2))
3481 6 : ereport(ERROR,
3482 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
3483 : errmsg("interval out of range")));
3484 : else
3485 36 : INTERVAL_NOEND(result);
3486 : }
3487 462 : else if (INTERVAL_NOT_FINITE(span2))
3488 138 : memcpy(result, span2, sizeof(Interval));
3489 : else
3490 324 : finite_interval_pl(span1, span2, result);
3491 :
3492 534 : PG_RETURN_INTERVAL_P(result);
3493 : }
3494 :
3495 : static void
3496 1548 : finite_interval_mi(const Interval *span1, const Interval *span2, Interval *result)
3497 : {
3498 : Assert(!INTERVAL_NOT_FINITE(span1));
3499 : Assert(!INTERVAL_NOT_FINITE(span2));
3500 :
3501 3096 : if (pg_sub_s32_overflow(span1->month, span2->month, &result->month) ||
3502 3096 : pg_sub_s32_overflow(span1->day, span2->day, &result->day) ||
3503 1548 : pg_sub_s64_overflow(span1->time, span2->time, &result->time) ||
3504 1548 : INTERVAL_NOT_FINITE(result))
3505 12 : ereport(ERROR,
3506 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
3507 : errmsg("interval out of range")));
3508 1536 : }
3509 :
3510 : Datum
3511 1794 : interval_mi(PG_FUNCTION_ARGS)
3512 : {
3513 1794 : Interval *span1 = PG_GETARG_INTERVAL_P(0);
3514 1794 : Interval *span2 = PG_GETARG_INTERVAL_P(1);
3515 : Interval *result;
3516 :
3517 1794 : result = (Interval *) palloc(sizeof(Interval));
3518 :
3519 : /*
3520 : * Handle infinities.
3521 : *
3522 : * We treat anything that amounts to "infinity - infinity" as an error,
3523 : * since the interval type has nothing equivalent to NaN.
3524 : */
3525 1794 : if (INTERVAL_IS_NOBEGIN(span1))
3526 : {
3527 54 : if (INTERVAL_IS_NOBEGIN(span2))
3528 6 : ereport(ERROR,
3529 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
3530 : errmsg("interval out of range")));
3531 : else
3532 48 : INTERVAL_NOBEGIN(result);
3533 : }
3534 1740 : else if (INTERVAL_IS_NOEND(span1))
3535 : {
3536 48 : if (INTERVAL_IS_NOEND(span2))
3537 6 : ereport(ERROR,
3538 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
3539 : errmsg("interval out of range")));
3540 : else
3541 42 : INTERVAL_NOEND(result);
3542 : }
3543 1692 : else if (INTERVAL_IS_NOBEGIN(span2))
3544 6 : INTERVAL_NOEND(result);
3545 1686 : else if (INTERVAL_IS_NOEND(span2))
3546 186 : INTERVAL_NOBEGIN(result);
3547 : else
3548 1500 : finite_interval_mi(span1, span2, result);
3549 :
3550 1770 : PG_RETURN_INTERVAL_P(result);
3551 : }
3552 :
3553 : /*
3554 : * There is no interval_abs(): it is unclear what value to return:
3555 : * http://archives.postgresql.org/pgsql-general/2009-10/msg01031.php
3556 : * http://archives.postgresql.org/pgsql-general/2009-11/msg00041.php
3557 : */
3558 :
3559 : Datum
3560 11652 : interval_mul(PG_FUNCTION_ARGS)
3561 : {
3562 11652 : Interval *span = PG_GETARG_INTERVAL_P(0);
3563 11652 : float8 factor = PG_GETARG_FLOAT8(1);
3564 : double month_remainder_days,
3565 : sec_remainder,
3566 : result_double;
3567 11652 : int32 orig_month = span->month,
3568 11652 : orig_day = span->day;
3569 : Interval *result;
3570 :
3571 11652 : result = (Interval *) palloc(sizeof(Interval));
3572 :
3573 : /*
3574 : * Handle NaN and infinities.
3575 : *
3576 : * We treat "0 * infinity" and "infinity * 0" as errors, since the
3577 : * interval type has nothing equivalent to NaN.
3578 : */
3579 11652 : if (isnan(factor))
3580 12 : goto out_of_range;
3581 :
3582 11640 : if (INTERVAL_NOT_FINITE(span))
3583 : {
3584 60 : if (factor == 0.0)
3585 12 : goto out_of_range;
3586 :
3587 48 : if (factor < 0.0)
3588 24 : interval_um_internal(span, result);
3589 : else
3590 24 : memcpy(result, span, sizeof(Interval));
3591 :
3592 48 : PG_RETURN_INTERVAL_P(result);
3593 : }
3594 11580 : if (isinf(factor))
3595 : {
3596 24 : int isign = interval_sign(span);
3597 :
3598 24 : if (isign == 0)
3599 12 : goto out_of_range;
3600 :
3601 12 : if (factor * isign < 0)
3602 6 : INTERVAL_NOBEGIN(result);
3603 : else
3604 6 : INTERVAL_NOEND(result);
3605 :
3606 12 : PG_RETURN_INTERVAL_P(result);
3607 : }
3608 :
3609 11556 : result_double = span->month * factor;
3610 11556 : if (isnan(result_double) || !FLOAT8_FITS_IN_INT32(result_double))
3611 6 : goto out_of_range;
3612 11550 : result->month = (int32) result_double;
3613 :
3614 11550 : result_double = span->day * factor;
3615 11550 : if (isnan(result_double) || !FLOAT8_FITS_IN_INT32(result_double))
3616 6 : goto out_of_range;
3617 11544 : result->day = (int32) result_double;
3618 :
3619 : /*
3620 : * The above correctly handles the whole-number part of the month and day
3621 : * products, but we have to do something with any fractional part
3622 : * resulting when the factor is non-integral. We cascade the fractions
3623 : * down to lower units using the conversion factors DAYS_PER_MONTH and
3624 : * SECS_PER_DAY. Note we do NOT cascade up, since we are not forced to do
3625 : * so by the representation. The user can choose to cascade up later,
3626 : * using justify_hours and/or justify_days.
3627 : */
3628 :
3629 : /*
3630 : * Fractional months full days into days.
3631 : *
3632 : * Floating point calculation are inherently imprecise, so these
3633 : * calculations are crafted to produce the most reliable result possible.
3634 : * TSROUND() is needed to more accurately produce whole numbers where
3635 : * appropriate.
3636 : */
3637 11544 : month_remainder_days = (orig_month * factor - result->month) * DAYS_PER_MONTH;
3638 11544 : month_remainder_days = TSROUND(month_remainder_days);
3639 11544 : sec_remainder = (orig_day * factor - result->day +
3640 11544 : month_remainder_days - (int) month_remainder_days) * SECS_PER_DAY;
3641 11544 : sec_remainder = TSROUND(sec_remainder);
3642 :
3643 : /*
3644 : * Might have 24:00:00 hours due to rounding, or >24 hours because of time
3645 : * cascade from months and days. It might still be >24 if the combination
3646 : * of cascade and the seconds factor operation itself.
3647 : */
3648 11544 : if (fabs(sec_remainder) >= SECS_PER_DAY)
3649 : {
3650 0 : if (pg_add_s32_overflow(result->day,
3651 0 : (int) (sec_remainder / SECS_PER_DAY),
3652 : &result->day))
3653 0 : goto out_of_range;
3654 0 : sec_remainder -= (int) (sec_remainder / SECS_PER_DAY) * SECS_PER_DAY;
3655 : }
3656 :
3657 : /* cascade units down */
3658 11544 : if (pg_add_s32_overflow(result->day, (int32) month_remainder_days,
3659 : &result->day))
3660 6 : goto out_of_range;
3661 11538 : result_double = rint(span->time * factor + sec_remainder * USECS_PER_SEC);
3662 11538 : if (isnan(result_double) || !FLOAT8_FITS_IN_INT64(result_double))
3663 6 : goto out_of_range;
3664 11532 : result->time = (int64) result_double;
3665 :
3666 11532 : if (INTERVAL_NOT_FINITE(result))
3667 6 : goto out_of_range;
3668 :
3669 11526 : PG_RETURN_INTERVAL_P(result);
3670 :
3671 66 : out_of_range:
3672 66 : ereport(ERROR,
3673 : errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
3674 : errmsg("interval out of range"));
3675 :
3676 : PG_RETURN_NULL(); /* keep compiler quiet */
3677 : }
3678 :
3679 : Datum
3680 11430 : mul_d_interval(PG_FUNCTION_ARGS)
3681 : {
3682 : /* Args are float8 and Interval *, but leave them as generic Datum */
3683 11430 : Datum factor = PG_GETARG_DATUM(0);
3684 11430 : Datum span = PG_GETARG_DATUM(1);
3685 :
3686 11430 : return DirectFunctionCall2(interval_mul, span, factor);
3687 : }
3688 :
3689 : Datum
3690 222 : interval_div(PG_FUNCTION_ARGS)
3691 : {
3692 222 : Interval *span = PG_GETARG_INTERVAL_P(0);
3693 222 : float8 factor = PG_GETARG_FLOAT8(1);
3694 : double month_remainder_days,
3695 : sec_remainder,
3696 : result_double;
3697 222 : int32 orig_month = span->month,
3698 222 : orig_day = span->day;
3699 : Interval *result;
3700 :
3701 222 : result = (Interval *) palloc(sizeof(Interval));
3702 :
3703 222 : if (factor == 0.0)
3704 0 : ereport(ERROR,
3705 : (errcode(ERRCODE_DIVISION_BY_ZERO),
3706 : errmsg("division by zero")));
3707 :
3708 : /*
3709 : * Handle NaN and infinities.
3710 : *
3711 : * We treat "infinity / infinity" as an error, since the interval type has
3712 : * nothing equivalent to NaN. Otherwise, dividing by infinity is handled
3713 : * by the regular division code, causing all fields to be set to zero.
3714 : */
3715 222 : if (isnan(factor))
3716 12 : goto out_of_range;
3717 :
3718 210 : if (INTERVAL_NOT_FINITE(span))
3719 : {
3720 48 : if (isinf(factor))
3721 24 : goto out_of_range;
3722 :
3723 24 : if (factor < 0.0)
3724 12 : interval_um_internal(span, result);
3725 : else
3726 12 : memcpy(result, span, sizeof(Interval));
3727 :
3728 24 : PG_RETURN_INTERVAL_P(result);
3729 : }
3730 :
3731 162 : result_double = span->month / factor;
3732 162 : if (isnan(result_double) || !FLOAT8_FITS_IN_INT32(result_double))
3733 6 : goto out_of_range;
3734 156 : result->month = (int32) result_double;
3735 :
3736 156 : result_double = span->day / factor;
3737 156 : if (isnan(result_double) || !FLOAT8_FITS_IN_INT32(result_double))
3738 6 : goto out_of_range;
3739 150 : result->day = (int32) result_double;
3740 :
3741 : /*
3742 : * Fractional months full days into days. See comment in interval_mul().
3743 : */
3744 150 : month_remainder_days = (orig_month / factor - result->month) * DAYS_PER_MONTH;
3745 150 : month_remainder_days = TSROUND(month_remainder_days);
3746 150 : sec_remainder = (orig_day / factor - result->day +
3747 150 : month_remainder_days - (int) month_remainder_days) * SECS_PER_DAY;
3748 150 : sec_remainder = TSROUND(sec_remainder);
3749 150 : if (fabs(sec_remainder) >= SECS_PER_DAY)
3750 : {
3751 6 : if (pg_add_s32_overflow(result->day,
3752 6 : (int) (sec_remainder / SECS_PER_DAY),
3753 : &result->day))
3754 0 : goto out_of_range;
3755 6 : sec_remainder -= (int) (sec_remainder / SECS_PER_DAY) * SECS_PER_DAY;
3756 : }
3757 :
3758 : /* cascade units down */
3759 150 : if (pg_add_s32_overflow(result->day, (int32) month_remainder_days,
3760 : &result->day))
3761 0 : goto out_of_range;
3762 150 : result_double = rint(span->time / factor + sec_remainder * USECS_PER_SEC);
3763 150 : if (isnan(result_double) || !FLOAT8_FITS_IN_INT64(result_double))
3764 6 : goto out_of_range;
3765 144 : result->time = (int64) result_double;
3766 :
3767 144 : if (INTERVAL_NOT_FINITE(result))
3768 6 : goto out_of_range;
3769 :
3770 138 : PG_RETURN_INTERVAL_P(result);
3771 :
3772 60 : out_of_range:
3773 60 : ereport(ERROR,
3774 : errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
3775 : errmsg("interval out of range"));
3776 :
3777 : PG_RETURN_NULL(); /* keep compiler quiet */
3778 : }
3779 :
3780 :
3781 : /*
3782 : * in_range support functions for timestamps and intervals.
3783 : *
3784 : * Per SQL spec, we support these with interval as the offset type.
3785 : * The spec's restriction that the offset not be negative is a bit hard to
3786 : * decipher for intervals, but we choose to interpret it the same as our
3787 : * interval comparison operators would.
3788 : */
3789 :
3790 : Datum
3791 1134 : in_range_timestamptz_interval(PG_FUNCTION_ARGS)
3792 : {
3793 1134 : TimestampTz val = PG_GETARG_TIMESTAMPTZ(0);
3794 1134 : TimestampTz base = PG_GETARG_TIMESTAMPTZ(1);
3795 1134 : Interval *offset = PG_GETARG_INTERVAL_P(2);
3796 1134 : bool sub = PG_GETARG_BOOL(3);
3797 1134 : bool less = PG_GETARG_BOOL(4);
3798 : TimestampTz sum;
3799 :
3800 1134 : if (interval_sign(offset) < 0)
3801 12 : ereport(ERROR,
3802 : (errcode(ERRCODE_INVALID_PRECEDING_OR_FOLLOWING_SIZE),
3803 : errmsg("invalid preceding or following size in window function")));
3804 :
3805 : /*
3806 : * Deal with cases where both base and offset are infinite, and computing
3807 : * base +/- offset would cause an error. As for float and numeric types,
3808 : * we assume that all values infinitely precede +infinity and infinitely
3809 : * follow -infinity. See in_range_float8_float8() for reasoning.
3810 : */
3811 1122 : if (INTERVAL_IS_NOEND(offset) &&
3812 : (sub ? TIMESTAMP_IS_NOEND(base) : TIMESTAMP_IS_NOBEGIN(base)))
3813 228 : PG_RETURN_BOOL(true);
3814 :
3815 : /* We don't currently bother to avoid overflow hazards here */
3816 894 : if (sub)
3817 480 : sum = timestamptz_mi_interval_internal(base, offset, NULL);
3818 : else
3819 414 : sum = timestamptz_pl_interval_internal(base, offset, NULL);
3820 :
3821 894 : if (less)
3822 354 : PG_RETURN_BOOL(val <= sum);
3823 : else
3824 540 : PG_RETURN_BOOL(val >= sum);
3825 : }
3826 :
3827 : Datum
3828 2466 : in_range_timestamp_interval(PG_FUNCTION_ARGS)
3829 : {
3830 2466 : Timestamp val = PG_GETARG_TIMESTAMP(0);
3831 2466 : Timestamp base = PG_GETARG_TIMESTAMP(1);
3832 2466 : Interval *offset = PG_GETARG_INTERVAL_P(2);
3833 2466 : bool sub = PG_GETARG_BOOL(3);
3834 2466 : bool less = PG_GETARG_BOOL(4);
3835 : Timestamp sum;
3836 :
3837 2466 : if (interval_sign(offset) < 0)
3838 18 : ereport(ERROR,
3839 : (errcode(ERRCODE_INVALID_PRECEDING_OR_FOLLOWING_SIZE),
3840 : errmsg("invalid preceding or following size in window function")));
3841 :
3842 : /*
3843 : * Deal with cases where both base and offset are infinite, and computing
3844 : * base +/- offset would cause an error. As for float and numeric types,
3845 : * we assume that all values infinitely precede +infinity and infinitely
3846 : * follow -infinity. See in_range_float8_float8() for reasoning.
3847 : */
3848 2448 : if (INTERVAL_IS_NOEND(offset) &&
3849 : (sub ? TIMESTAMP_IS_NOEND(base) : TIMESTAMP_IS_NOBEGIN(base)))
3850 228 : PG_RETURN_BOOL(true);
3851 :
3852 : /* We don't currently bother to avoid overflow hazards here */
3853 2220 : if (sub)
3854 1032 : sum = DatumGetTimestamp(DirectFunctionCall2(timestamp_mi_interval,
3855 : TimestampGetDatum(base),
3856 : IntervalPGetDatum(offset)));
3857 : else
3858 1188 : sum = DatumGetTimestamp(DirectFunctionCall2(timestamp_pl_interval,
3859 : TimestampGetDatum(base),
3860 : IntervalPGetDatum(offset)));
3861 :
3862 2220 : if (less)
3863 1206 : PG_RETURN_BOOL(val <= sum);
3864 : else
3865 1014 : PG_RETURN_BOOL(val >= sum);
3866 : }
3867 :
3868 : Datum
3869 1128 : in_range_interval_interval(PG_FUNCTION_ARGS)
3870 : {
3871 1128 : Interval *val = PG_GETARG_INTERVAL_P(0);
3872 1128 : Interval *base = PG_GETARG_INTERVAL_P(1);
3873 1128 : Interval *offset = PG_GETARG_INTERVAL_P(2);
3874 1128 : bool sub = PG_GETARG_BOOL(3);
3875 1128 : bool less = PG_GETARG_BOOL(4);
3876 : Interval *sum;
3877 :
3878 1128 : if (interval_sign(offset) < 0)
3879 12 : ereport(ERROR,
3880 : (errcode(ERRCODE_INVALID_PRECEDING_OR_FOLLOWING_SIZE),
3881 : errmsg("invalid preceding or following size in window function")));
3882 :
3883 : /*
3884 : * Deal with cases where both base and offset are infinite, and computing
3885 : * base +/- offset would cause an error. As for float and numeric types,
3886 : * we assume that all values infinitely precede +infinity and infinitely
3887 : * follow -infinity. See in_range_float8_float8() for reasoning.
3888 : */
3889 1680 : if (INTERVAL_IS_NOEND(offset) &&
3890 564 : (sub ? INTERVAL_IS_NOEND(base) : INTERVAL_IS_NOBEGIN(base)))
3891 228 : PG_RETURN_BOOL(true);
3892 :
3893 : /* We don't currently bother to avoid overflow hazards here */
3894 888 : if (sub)
3895 480 : sum = DatumGetIntervalP(DirectFunctionCall2(interval_mi,
3896 : IntervalPGetDatum(base),
3897 : IntervalPGetDatum(offset)));
3898 : else
3899 408 : sum = DatumGetIntervalP(DirectFunctionCall2(interval_pl,
3900 : IntervalPGetDatum(base),
3901 : IntervalPGetDatum(offset)));
3902 :
3903 888 : if (less)
3904 348 : PG_RETURN_BOOL(interval_cmp_internal(val, sum) <= 0);
3905 : else
3906 540 : PG_RETURN_BOOL(interval_cmp_internal(val, sum) >= 0);
3907 : }
3908 :
3909 :
3910 : /*
3911 : * Prepare state data for an interval aggregate function, that needs to compute
3912 : * sum and count, in the aggregate's memory context.
3913 : *
3914 : * The function is used when the state data needs to be allocated in aggregate's
3915 : * context. When the state data needs to be allocated in the current memory
3916 : * context, we use palloc0 directly e.g. interval_avg_deserialize().
3917 : */
3918 : static IntervalAggState *
3919 54 : makeIntervalAggState(FunctionCallInfo fcinfo)
3920 : {
3921 : IntervalAggState *state;
3922 : MemoryContext agg_context;
3923 : MemoryContext old_context;
3924 :
3925 54 : if (!AggCheckCallContext(fcinfo, &agg_context))
3926 0 : elog(ERROR, "aggregate function called in non-aggregate context");
3927 :
3928 54 : old_context = MemoryContextSwitchTo(agg_context);
3929 :
3930 54 : state = (IntervalAggState *) palloc0(sizeof(IntervalAggState));
3931 :
3932 54 : MemoryContextSwitchTo(old_context);
3933 :
3934 54 : return state;
3935 : }
3936 :
3937 : /*
3938 : * Accumulate a new input value for interval aggregate functions.
3939 : */
3940 : static void
3941 324 : do_interval_accum(IntervalAggState *state, Interval *newval)
3942 : {
3943 : /* Infinite inputs are counted separately, and do not affect "N" */
3944 324 : if (INTERVAL_IS_NOBEGIN(newval))
3945 : {
3946 60 : state->nInfcount++;
3947 60 : return;
3948 : }
3949 :
3950 264 : if (INTERVAL_IS_NOEND(newval))
3951 : {
3952 60 : state->pInfcount++;
3953 60 : return;
3954 : }
3955 :
3956 204 : finite_interval_pl(&state->sumX, newval, &state->sumX);
3957 204 : state->N++;
3958 : }
3959 :
3960 : /*
3961 : * Remove the given interval value from the aggregated state.
3962 : */
3963 : static void
3964 204 : do_interval_discard(IntervalAggState *state, Interval *newval)
3965 : {
3966 : /* Infinite inputs are counted separately, and do not affect "N" */
3967 204 : if (INTERVAL_IS_NOBEGIN(newval))
3968 : {
3969 24 : state->nInfcount--;
3970 24 : return;
3971 : }
3972 :
3973 180 : if (INTERVAL_IS_NOEND(newval))
3974 : {
3975 48 : state->pInfcount--;
3976 48 : return;
3977 : }
3978 :
3979 : /* Handle the to-be-discarded finite value. */
3980 132 : state->N--;
3981 132 : if (state->N > 0)
3982 48 : finite_interval_mi(&state->sumX, newval, &state->sumX);
3983 : else
3984 : {
3985 : /* All values discarded, reset the state */
3986 : Assert(state->N == 0);
3987 84 : memset(&state->sumX, 0, sizeof(state->sumX));
3988 : }
3989 : }
3990 :
3991 : /*
3992 : * Transition function for sum() and avg() interval aggregates.
3993 : */
3994 : Datum
3995 408 : interval_avg_accum(PG_FUNCTION_ARGS)
3996 : {
3997 : IntervalAggState *state;
3998 :
3999 408 : state = PG_ARGISNULL(0) ? NULL : (IntervalAggState *) PG_GETARG_POINTER(0);
4000 :
4001 : /* Create the state data on the first call */
4002 408 : if (state == NULL)
4003 54 : state = makeIntervalAggState(fcinfo);
4004 :
4005 408 : if (!PG_ARGISNULL(1))
4006 324 : do_interval_accum(state, PG_GETARG_INTERVAL_P(1));
4007 :
4008 408 : PG_RETURN_POINTER(state);
4009 : }
4010 :
4011 : /*
4012 : * Combine function for sum() and avg() interval aggregates.
4013 : *
4014 : * Combine the given internal aggregate states and place the combination in
4015 : * the first argument.
4016 : */
4017 : Datum
4018 0 : interval_avg_combine(PG_FUNCTION_ARGS)
4019 : {
4020 : IntervalAggState *state1;
4021 : IntervalAggState *state2;
4022 :
4023 0 : state1 = PG_ARGISNULL(0) ? NULL : (IntervalAggState *) PG_GETARG_POINTER(0);
4024 0 : state2 = PG_ARGISNULL(1) ? NULL : (IntervalAggState *) PG_GETARG_POINTER(1);
4025 :
4026 0 : if (state2 == NULL)
4027 0 : PG_RETURN_POINTER(state1);
4028 :
4029 0 : if (state1 == NULL)
4030 : {
4031 : /* manually copy all fields from state2 to state1 */
4032 0 : state1 = makeIntervalAggState(fcinfo);
4033 :
4034 0 : state1->N = state2->N;
4035 0 : state1->pInfcount = state2->pInfcount;
4036 0 : state1->nInfcount = state2->nInfcount;
4037 :
4038 0 : state1->sumX.day = state2->sumX.day;
4039 0 : state1->sumX.month = state2->sumX.month;
4040 0 : state1->sumX.time = state2->sumX.time;
4041 :
4042 0 : PG_RETURN_POINTER(state1);
4043 : }
4044 :
4045 0 : state1->N += state2->N;
4046 0 : state1->pInfcount += state2->pInfcount;
4047 0 : state1->nInfcount += state2->nInfcount;
4048 :
4049 : /* Accumulate finite interval values, if any. */
4050 0 : if (state2->N > 0)
4051 0 : finite_interval_pl(&state1->sumX, &state2->sumX, &state1->sumX);
4052 :
4053 0 : PG_RETURN_POINTER(state1);
4054 : }
4055 :
4056 : /*
4057 : * interval_avg_serialize
4058 : * Serialize IntervalAggState for interval aggregates.
4059 : */
4060 : Datum
4061 0 : interval_avg_serialize(PG_FUNCTION_ARGS)
4062 : {
4063 : IntervalAggState *state;
4064 : StringInfoData buf;
4065 : bytea *result;
4066 :
4067 : /* Ensure we disallow calling when not in aggregate context */
4068 0 : if (!AggCheckCallContext(fcinfo, NULL))
4069 0 : elog(ERROR, "aggregate function called in non-aggregate context");
4070 :
4071 0 : state = (IntervalAggState *) PG_GETARG_POINTER(0);
4072 :
4073 0 : pq_begintypsend(&buf);
4074 :
4075 : /* N */
4076 0 : pq_sendint64(&buf, state->N);
4077 :
4078 : /* sumX */
4079 0 : pq_sendint64(&buf, state->sumX.time);
4080 0 : pq_sendint32(&buf, state->sumX.day);
4081 0 : pq_sendint32(&buf, state->sumX.month);
4082 :
4083 : /* pInfcount */
4084 0 : pq_sendint64(&buf, state->pInfcount);
4085 :
4086 : /* nInfcount */
4087 0 : pq_sendint64(&buf, state->nInfcount);
4088 :
4089 0 : result = pq_endtypsend(&buf);
4090 :
4091 0 : PG_RETURN_BYTEA_P(result);
4092 : }
4093 :
4094 : /*
4095 : * interval_avg_deserialize
4096 : * Deserialize bytea into IntervalAggState for interval aggregates.
4097 : */
4098 : Datum
4099 0 : interval_avg_deserialize(PG_FUNCTION_ARGS)
4100 : {
4101 : bytea *sstate;
4102 : IntervalAggState *result;
4103 : StringInfoData buf;
4104 :
4105 0 : if (!AggCheckCallContext(fcinfo, NULL))
4106 0 : elog(ERROR, "aggregate function called in non-aggregate context");
4107 :
4108 0 : sstate = PG_GETARG_BYTEA_PP(0);
4109 :
4110 : /*
4111 : * Initialize a StringInfo so that we can "receive" it using the standard
4112 : * recv-function infrastructure.
4113 : */
4114 0 : initReadOnlyStringInfo(&buf, VARDATA_ANY(sstate),
4115 0 : VARSIZE_ANY_EXHDR(sstate));
4116 :
4117 0 : result = (IntervalAggState *) palloc0(sizeof(IntervalAggState));
4118 :
4119 : /* N */
4120 0 : result->N = pq_getmsgint64(&buf);
4121 :
4122 : /* sumX */
4123 0 : result->sumX.time = pq_getmsgint64(&buf);
4124 0 : result->sumX.day = pq_getmsgint(&buf, 4);
4125 0 : result->sumX.month = pq_getmsgint(&buf, 4);
4126 :
4127 : /* pInfcount */
4128 0 : result->pInfcount = pq_getmsgint64(&buf);
4129 :
4130 : /* nInfcount */
4131 0 : result->nInfcount = pq_getmsgint64(&buf);
4132 :
4133 0 : pq_getmsgend(&buf);
4134 :
4135 0 : PG_RETURN_POINTER(result);
4136 : }
4137 :
4138 : /*
4139 : * Inverse transition function for sum() and avg() interval aggregates.
4140 : */
4141 : Datum
4142 264 : interval_avg_accum_inv(PG_FUNCTION_ARGS)
4143 : {
4144 : IntervalAggState *state;
4145 :
4146 264 : state = PG_ARGISNULL(0) ? NULL : (IntervalAggState *) PG_GETARG_POINTER(0);
4147 :
4148 : /* Should not get here with no state */
4149 264 : if (state == NULL)
4150 0 : elog(ERROR, "interval_avg_accum_inv called with NULL state");
4151 :
4152 264 : if (!PG_ARGISNULL(1))
4153 204 : do_interval_discard(state, PG_GETARG_INTERVAL_P(1));
4154 :
4155 264 : PG_RETURN_POINTER(state);
4156 : }
4157 :
4158 : /* avg(interval) aggregate final function */
4159 : Datum
4160 168 : interval_avg(PG_FUNCTION_ARGS)
4161 : {
4162 : IntervalAggState *state;
4163 :
4164 168 : state = PG_ARGISNULL(0) ? NULL : (IntervalAggState *) PG_GETARG_POINTER(0);
4165 :
4166 : /* If there were no non-null inputs, return NULL */
4167 168 : if (state == NULL || IA_TOTAL_COUNT(state) == 0)
4168 18 : PG_RETURN_NULL();
4169 :
4170 : /*
4171 : * Aggregating infinities that all have the same sign produces infinity
4172 : * with that sign. Aggregating infinities with different signs results in
4173 : * an error.
4174 : */
4175 150 : if (state->pInfcount > 0 || state->nInfcount > 0)
4176 : {
4177 : Interval *result;
4178 :
4179 108 : if (state->pInfcount > 0 && state->nInfcount > 0)
4180 6 : ereport(ERROR,
4181 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
4182 : errmsg("interval out of range")));
4183 :
4184 102 : result = (Interval *) palloc(sizeof(Interval));
4185 102 : if (state->pInfcount > 0)
4186 60 : INTERVAL_NOEND(result);
4187 : else
4188 42 : INTERVAL_NOBEGIN(result);
4189 :
4190 102 : PG_RETURN_INTERVAL_P(result);
4191 : }
4192 :
4193 42 : return DirectFunctionCall2(interval_div,
4194 : IntervalPGetDatum(&state->sumX),
4195 : Float8GetDatum((double) state->N));
4196 : }
4197 :
4198 : /* sum(interval) aggregate final function */
4199 : Datum
4200 162 : interval_sum(PG_FUNCTION_ARGS)
4201 : {
4202 : IntervalAggState *state;
4203 : Interval *result;
4204 :
4205 162 : state = PG_ARGISNULL(0) ? NULL : (IntervalAggState *) PG_GETARG_POINTER(0);
4206 :
4207 : /* If there were no non-null inputs, return NULL */
4208 162 : if (state == NULL || IA_TOTAL_COUNT(state) == 0)
4209 18 : PG_RETURN_NULL();
4210 :
4211 : /*
4212 : * Aggregating infinities that all have the same sign produces infinity
4213 : * with that sign. Aggregating infinities with different signs results in
4214 : * an error.
4215 : */
4216 144 : if (state->pInfcount > 0 && state->nInfcount > 0)
4217 6 : ereport(ERROR,
4218 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
4219 : errmsg("interval out of range")));
4220 :
4221 138 : result = (Interval *) palloc(sizeof(Interval));
4222 :
4223 138 : if (state->pInfcount > 0)
4224 60 : INTERVAL_NOEND(result);
4225 78 : else if (state->nInfcount > 0)
4226 42 : INTERVAL_NOBEGIN(result);
4227 : else
4228 36 : memcpy(result, &state->sumX, sizeof(Interval));
4229 :
4230 138 : PG_RETURN_INTERVAL_P(result);
4231 : }
4232 :
4233 : /* timestamp_age()
4234 : * Calculate time difference while retaining year/month fields.
4235 : * Note that this does not result in an accurate absolute time span
4236 : * since year and month are out of context once the arithmetic
4237 : * is done.
4238 : */
4239 : Datum
4240 36 : timestamp_age(PG_FUNCTION_ARGS)
4241 : {
4242 36 : Timestamp dt1 = PG_GETARG_TIMESTAMP(0);
4243 36 : Timestamp dt2 = PG_GETARG_TIMESTAMP(1);
4244 : Interval *result;
4245 : fsec_t fsec1,
4246 : fsec2;
4247 : struct pg_itm tt,
4248 36 : *tm = &tt;
4249 : struct pg_tm tt1,
4250 36 : *tm1 = &tt1;
4251 : struct pg_tm tt2,
4252 36 : *tm2 = &tt2;
4253 :
4254 36 : result = (Interval *) palloc(sizeof(Interval));
4255 :
4256 : /*
4257 : * Handle infinities.
4258 : *
4259 : * We treat anything that amounts to "infinity - infinity" as an error,
4260 : * since the interval type has nothing equivalent to NaN.
4261 : */
4262 36 : if (TIMESTAMP_IS_NOBEGIN(dt1))
4263 : {
4264 12 : if (TIMESTAMP_IS_NOBEGIN(dt2))
4265 6 : ereport(ERROR,
4266 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
4267 : errmsg("interval out of range")));
4268 : else
4269 6 : INTERVAL_NOBEGIN(result);
4270 : }
4271 24 : else if (TIMESTAMP_IS_NOEND(dt1))
4272 : {
4273 12 : if (TIMESTAMP_IS_NOEND(dt2))
4274 6 : ereport(ERROR,
4275 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
4276 : errmsg("interval out of range")));
4277 : else
4278 6 : INTERVAL_NOEND(result);
4279 : }
4280 12 : else if (TIMESTAMP_IS_NOBEGIN(dt2))
4281 6 : INTERVAL_NOEND(result);
4282 6 : else if (TIMESTAMP_IS_NOEND(dt2))
4283 6 : INTERVAL_NOBEGIN(result);
4284 0 : else if (timestamp2tm(dt1, NULL, tm1, &fsec1, NULL, NULL) == 0 &&
4285 0 : timestamp2tm(dt2, NULL, tm2, &fsec2, NULL, NULL) == 0)
4286 : {
4287 : /* form the symbolic difference */
4288 0 : tm->tm_usec = fsec1 - fsec2;
4289 0 : tm->tm_sec = tm1->tm_sec - tm2->tm_sec;
4290 0 : tm->tm_min = tm1->tm_min - tm2->tm_min;
4291 0 : tm->tm_hour = tm1->tm_hour - tm2->tm_hour;
4292 0 : tm->tm_mday = tm1->tm_mday - tm2->tm_mday;
4293 0 : tm->tm_mon = tm1->tm_mon - tm2->tm_mon;
4294 0 : tm->tm_year = tm1->tm_year - tm2->tm_year;
4295 :
4296 : /* flip sign if necessary... */
4297 0 : if (dt1 < dt2)
4298 : {
4299 0 : tm->tm_usec = -tm->tm_usec;
4300 0 : tm->tm_sec = -tm->tm_sec;
4301 0 : tm->tm_min = -tm->tm_min;
4302 0 : tm->tm_hour = -tm->tm_hour;
4303 0 : tm->tm_mday = -tm->tm_mday;
4304 0 : tm->tm_mon = -tm->tm_mon;
4305 0 : tm->tm_year = -tm->tm_year;
4306 : }
4307 :
4308 : /* propagate any negative fields into the next higher field */
4309 0 : while (tm->tm_usec < 0)
4310 : {
4311 0 : tm->tm_usec += USECS_PER_SEC;
4312 0 : tm->tm_sec--;
4313 : }
4314 :
4315 0 : while (tm->tm_sec < 0)
4316 : {
4317 0 : tm->tm_sec += SECS_PER_MINUTE;
4318 0 : tm->tm_min--;
4319 : }
4320 :
4321 0 : while (tm->tm_min < 0)
4322 : {
4323 0 : tm->tm_min += MINS_PER_HOUR;
4324 0 : tm->tm_hour--;
4325 : }
4326 :
4327 0 : while (tm->tm_hour < 0)
4328 : {
4329 0 : tm->tm_hour += HOURS_PER_DAY;
4330 0 : tm->tm_mday--;
4331 : }
4332 :
4333 0 : while (tm->tm_mday < 0)
4334 : {
4335 0 : if (dt1 < dt2)
4336 : {
4337 0 : tm->tm_mday += day_tab[isleap(tm1->tm_year)][tm1->tm_mon - 1];
4338 0 : tm->tm_mon--;
4339 : }
4340 : else
4341 : {
4342 0 : tm->tm_mday += day_tab[isleap(tm2->tm_year)][tm2->tm_mon - 1];
4343 0 : tm->tm_mon--;
4344 : }
4345 : }
4346 :
4347 0 : while (tm->tm_mon < 0)
4348 : {
4349 0 : tm->tm_mon += MONTHS_PER_YEAR;
4350 0 : tm->tm_year--;
4351 : }
4352 :
4353 : /* recover sign if necessary... */
4354 0 : if (dt1 < dt2)
4355 : {
4356 0 : tm->tm_usec = -tm->tm_usec;
4357 0 : tm->tm_sec = -tm->tm_sec;
4358 0 : tm->tm_min = -tm->tm_min;
4359 0 : tm->tm_hour = -tm->tm_hour;
4360 0 : tm->tm_mday = -tm->tm_mday;
4361 0 : tm->tm_mon = -tm->tm_mon;
4362 0 : tm->tm_year = -tm->tm_year;
4363 : }
4364 :
4365 0 : if (itm2interval(tm, result) != 0)
4366 0 : ereport(ERROR,
4367 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
4368 : errmsg("interval out of range")));
4369 : }
4370 : else
4371 0 : ereport(ERROR,
4372 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
4373 : errmsg("timestamp out of range")));
4374 :
4375 24 : PG_RETURN_INTERVAL_P(result);
4376 : }
4377 :
4378 :
4379 : /* timestamptz_age()
4380 : * Calculate time difference while retaining year/month fields.
4381 : * Note that this does not result in an accurate absolute time span
4382 : * since year and month are out of context once the arithmetic
4383 : * is done.
4384 : */
4385 : Datum
4386 36 : timestamptz_age(PG_FUNCTION_ARGS)
4387 : {
4388 36 : TimestampTz dt1 = PG_GETARG_TIMESTAMPTZ(0);
4389 36 : TimestampTz dt2 = PG_GETARG_TIMESTAMPTZ(1);
4390 : Interval *result;
4391 : fsec_t fsec1,
4392 : fsec2;
4393 : struct pg_itm tt,
4394 36 : *tm = &tt;
4395 : struct pg_tm tt1,
4396 36 : *tm1 = &tt1;
4397 : struct pg_tm tt2,
4398 36 : *tm2 = &tt2;
4399 : int tz1;
4400 : int tz2;
4401 :
4402 36 : result = (Interval *) palloc(sizeof(Interval));
4403 :
4404 : /*
4405 : * Handle infinities.
4406 : *
4407 : * We treat anything that amounts to "infinity - infinity" as an error,
4408 : * since the interval type has nothing equivalent to NaN.
4409 : */
4410 36 : if (TIMESTAMP_IS_NOBEGIN(dt1))
4411 : {
4412 12 : if (TIMESTAMP_IS_NOBEGIN(dt2))
4413 6 : ereport(ERROR,
4414 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
4415 : errmsg("interval out of range")));
4416 : else
4417 6 : INTERVAL_NOBEGIN(result);
4418 : }
4419 24 : else if (TIMESTAMP_IS_NOEND(dt1))
4420 : {
4421 12 : if (TIMESTAMP_IS_NOEND(dt2))
4422 6 : ereport(ERROR,
4423 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
4424 : errmsg("interval out of range")));
4425 : else
4426 6 : INTERVAL_NOEND(result);
4427 : }
4428 12 : else if (TIMESTAMP_IS_NOBEGIN(dt2))
4429 6 : INTERVAL_NOEND(result);
4430 6 : else if (TIMESTAMP_IS_NOEND(dt2))
4431 6 : INTERVAL_NOBEGIN(result);
4432 0 : else if (timestamp2tm(dt1, &tz1, tm1, &fsec1, NULL, NULL) == 0 &&
4433 0 : timestamp2tm(dt2, &tz2, tm2, &fsec2, NULL, NULL) == 0)
4434 : {
4435 : /* form the symbolic difference */
4436 0 : tm->tm_usec = fsec1 - fsec2;
4437 0 : tm->tm_sec = tm1->tm_sec - tm2->tm_sec;
4438 0 : tm->tm_min = tm1->tm_min - tm2->tm_min;
4439 0 : tm->tm_hour = tm1->tm_hour - tm2->tm_hour;
4440 0 : tm->tm_mday = tm1->tm_mday - tm2->tm_mday;
4441 0 : tm->tm_mon = tm1->tm_mon - tm2->tm_mon;
4442 0 : tm->tm_year = tm1->tm_year - tm2->tm_year;
4443 :
4444 : /* flip sign if necessary... */
4445 0 : if (dt1 < dt2)
4446 : {
4447 0 : tm->tm_usec = -tm->tm_usec;
4448 0 : tm->tm_sec = -tm->tm_sec;
4449 0 : tm->tm_min = -tm->tm_min;
4450 0 : tm->tm_hour = -tm->tm_hour;
4451 0 : tm->tm_mday = -tm->tm_mday;
4452 0 : tm->tm_mon = -tm->tm_mon;
4453 0 : tm->tm_year = -tm->tm_year;
4454 : }
4455 :
4456 : /* propagate any negative fields into the next higher field */
4457 0 : while (tm->tm_usec < 0)
4458 : {
4459 0 : tm->tm_usec += USECS_PER_SEC;
4460 0 : tm->tm_sec--;
4461 : }
4462 :
4463 0 : while (tm->tm_sec < 0)
4464 : {
4465 0 : tm->tm_sec += SECS_PER_MINUTE;
4466 0 : tm->tm_min--;
4467 : }
4468 :
4469 0 : while (tm->tm_min < 0)
4470 : {
4471 0 : tm->tm_min += MINS_PER_HOUR;
4472 0 : tm->tm_hour--;
4473 : }
4474 :
4475 0 : while (tm->tm_hour < 0)
4476 : {
4477 0 : tm->tm_hour += HOURS_PER_DAY;
4478 0 : tm->tm_mday--;
4479 : }
4480 :
4481 0 : while (tm->tm_mday < 0)
4482 : {
4483 0 : if (dt1 < dt2)
4484 : {
4485 0 : tm->tm_mday += day_tab[isleap(tm1->tm_year)][tm1->tm_mon - 1];
4486 0 : tm->tm_mon--;
4487 : }
4488 : else
4489 : {
4490 0 : tm->tm_mday += day_tab[isleap(tm2->tm_year)][tm2->tm_mon - 1];
4491 0 : tm->tm_mon--;
4492 : }
4493 : }
4494 :
4495 0 : while (tm->tm_mon < 0)
4496 : {
4497 0 : tm->tm_mon += MONTHS_PER_YEAR;
4498 0 : tm->tm_year--;
4499 : }
4500 :
4501 : /*
4502 : * Note: we deliberately ignore any difference between tz1 and tz2.
4503 : */
4504 :
4505 : /* recover sign if necessary... */
4506 0 : if (dt1 < dt2)
4507 : {
4508 0 : tm->tm_usec = -tm->tm_usec;
4509 0 : tm->tm_sec = -tm->tm_sec;
4510 0 : tm->tm_min = -tm->tm_min;
4511 0 : tm->tm_hour = -tm->tm_hour;
4512 0 : tm->tm_mday = -tm->tm_mday;
4513 0 : tm->tm_mon = -tm->tm_mon;
4514 0 : tm->tm_year = -tm->tm_year;
4515 : }
4516 :
4517 0 : if (itm2interval(tm, result) != 0)
4518 0 : ereport(ERROR,
4519 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
4520 : errmsg("interval out of range")));
4521 : }
4522 : else
4523 0 : ereport(ERROR,
4524 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
4525 : errmsg("timestamp out of range")));
4526 :
4527 24 : PG_RETURN_INTERVAL_P(result);
4528 : }
4529 :
4530 :
4531 : /*----------------------------------------------------------
4532 : * Conversion operators.
4533 : *---------------------------------------------------------*/
4534 :
4535 :
4536 : /* timestamp_bin()
4537 : * Bin timestamp into specified interval.
4538 : */
4539 : Datum
4540 276 : timestamp_bin(PG_FUNCTION_ARGS)
4541 : {
4542 276 : Interval *stride = PG_GETARG_INTERVAL_P(0);
4543 276 : Timestamp timestamp = PG_GETARG_TIMESTAMP(1);
4544 276 : Timestamp origin = PG_GETARG_TIMESTAMP(2);
4545 : Timestamp result,
4546 : stride_usecs,
4547 : tm_diff,
4548 : tm_modulo,
4549 : tm_delta;
4550 :
4551 276 : if (TIMESTAMP_NOT_FINITE(timestamp))
4552 0 : PG_RETURN_TIMESTAMP(timestamp);
4553 :
4554 276 : if (TIMESTAMP_NOT_FINITE(origin))
4555 0 : ereport(ERROR,
4556 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
4557 : errmsg("origin out of range")));
4558 :
4559 276 : if (INTERVAL_NOT_FINITE(stride))
4560 12 : ereport(ERROR,
4561 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
4562 : errmsg("timestamps cannot be binned into infinite intervals")));
4563 :
4564 264 : if (stride->month != 0)
4565 12 : ereport(ERROR,
4566 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
4567 : errmsg("timestamps cannot be binned into intervals containing months or years")));
4568 :
4569 252 : if (unlikely(pg_mul_s64_overflow(stride->day, USECS_PER_DAY, &stride_usecs)) ||
4570 246 : unlikely(pg_add_s64_overflow(stride_usecs, stride->time, &stride_usecs)))
4571 6 : ereport(ERROR,
4572 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
4573 : errmsg("interval out of range")));
4574 :
4575 246 : if (stride_usecs <= 0)
4576 12 : ereport(ERROR,
4577 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
4578 : errmsg("stride must be greater than zero")));
4579 :
4580 234 : if (unlikely(pg_sub_s64_overflow(timestamp, origin, &tm_diff)))
4581 6 : ereport(ERROR,
4582 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
4583 : errmsg("interval out of range")));
4584 :
4585 : /* These calculations cannot overflow */
4586 228 : tm_modulo = tm_diff % stride_usecs;
4587 228 : tm_delta = tm_diff - tm_modulo;
4588 228 : result = origin + tm_delta;
4589 :
4590 : /*
4591 : * We want to round towards -infinity, not 0, when tm_diff is negative and
4592 : * not a multiple of stride_usecs. This adjustment *can* cause overflow,
4593 : * since the result might now be out of the range origin .. timestamp.
4594 : */
4595 228 : if (tm_modulo < 0)
4596 : {
4597 78 : if (unlikely(pg_sub_s64_overflow(result, stride_usecs, &result)) ||
4598 78 : !IS_VALID_TIMESTAMP(result))
4599 6 : ereport(ERROR,
4600 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
4601 : errmsg("timestamp out of range")));
4602 : }
4603 :
4604 222 : PG_RETURN_TIMESTAMP(result);
4605 : }
4606 :
4607 : /* timestamp_trunc()
4608 : * Truncate timestamp to specified units.
4609 : */
4610 : Datum
4611 1392 : timestamp_trunc(PG_FUNCTION_ARGS)
4612 : {
4613 1392 : text *units = PG_GETARG_TEXT_PP(0);
4614 1392 : Timestamp timestamp = PG_GETARG_TIMESTAMP(1);
4615 : Timestamp result;
4616 : int type,
4617 : val;
4618 : char *lowunits;
4619 : fsec_t fsec;
4620 : struct pg_tm tt,
4621 1392 : *tm = &tt;
4622 :
4623 1392 : lowunits = downcase_truncate_identifier(VARDATA_ANY(units),
4624 1392 : VARSIZE_ANY_EXHDR(units),
4625 : false);
4626 :
4627 1392 : type = DecodeUnits(0, lowunits, &val);
4628 :
4629 1392 : if (type == UNITS)
4630 : {
4631 1386 : if (TIMESTAMP_NOT_FINITE(timestamp))
4632 : {
4633 : /*
4634 : * Errors thrown here for invalid units should exactly match those
4635 : * below, else there will be unexpected discrepancies between
4636 : * finite- and infinite-input cases.
4637 : */
4638 0 : switch (val)
4639 : {
4640 0 : case DTK_WEEK:
4641 : case DTK_MILLENNIUM:
4642 : case DTK_CENTURY:
4643 : case DTK_DECADE:
4644 : case DTK_YEAR:
4645 : case DTK_QUARTER:
4646 : case DTK_MONTH:
4647 : case DTK_DAY:
4648 : case DTK_HOUR:
4649 : case DTK_MINUTE:
4650 : case DTK_SECOND:
4651 : case DTK_MILLISEC:
4652 : case DTK_MICROSEC:
4653 0 : PG_RETURN_TIMESTAMP(timestamp);
4654 : break;
4655 0 : default:
4656 0 : ereport(ERROR,
4657 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
4658 : errmsg("unit \"%s\" not supported for type %s",
4659 : lowunits, format_type_be(TIMESTAMPOID))));
4660 : result = 0;
4661 : }
4662 : }
4663 :
4664 1386 : if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL, NULL) != 0)
4665 0 : ereport(ERROR,
4666 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
4667 : errmsg("timestamp out of range")));
4668 :
4669 1386 : switch (val)
4670 : {
4671 30 : case DTK_WEEK:
4672 : {
4673 : int woy;
4674 :
4675 30 : woy = date2isoweek(tm->tm_year, tm->tm_mon, tm->tm_mday);
4676 :
4677 : /*
4678 : * If it is week 52/53 and the month is January, then the
4679 : * week must belong to the previous year. Also, some
4680 : * December dates belong to the next year.
4681 : */
4682 30 : if (woy >= 52 && tm->tm_mon == 1)
4683 0 : --tm->tm_year;
4684 30 : if (woy <= 1 && tm->tm_mon == MONTHS_PER_YEAR)
4685 0 : ++tm->tm_year;
4686 30 : isoweek2date(woy, &(tm->tm_year), &(tm->tm_mon), &(tm->tm_mday));
4687 30 : tm->tm_hour = 0;
4688 30 : tm->tm_min = 0;
4689 30 : tm->tm_sec = 0;
4690 30 : fsec = 0;
4691 30 : break;
4692 : }
4693 6 : case DTK_MILLENNIUM:
4694 : /* see comments in timestamptz_trunc */
4695 6 : if (tm->tm_year > 0)
4696 6 : tm->tm_year = ((tm->tm_year + 999) / 1000) * 1000 - 999;
4697 : else
4698 0 : tm->tm_year = -((999 - (tm->tm_year - 1)) / 1000) * 1000 + 1;
4699 : /* FALL THRU */
4700 : case DTK_CENTURY:
4701 : /* see comments in timestamptz_trunc */
4702 12 : if (tm->tm_year > 0)
4703 12 : tm->tm_year = ((tm->tm_year + 99) / 100) * 100 - 99;
4704 : else
4705 0 : tm->tm_year = -((99 - (tm->tm_year - 1)) / 100) * 100 + 1;
4706 : /* FALL THRU */
4707 : case DTK_DECADE:
4708 : /* see comments in timestamptz_trunc */
4709 12 : if (val != DTK_MILLENNIUM && val != DTK_CENTURY)
4710 : {
4711 0 : if (tm->tm_year > 0)
4712 0 : tm->tm_year = (tm->tm_year / 10) * 10;
4713 : else
4714 0 : tm->tm_year = -((8 - (tm->tm_year - 1)) / 10) * 10;
4715 : }
4716 : /* FALL THRU */
4717 : case DTK_YEAR:
4718 12 : tm->tm_mon = 1;
4719 : /* FALL THRU */
4720 12 : case DTK_QUARTER:
4721 12 : tm->tm_mon = (3 * ((tm->tm_mon - 1) / 3)) + 1;
4722 : /* FALL THRU */
4723 12 : case DTK_MONTH:
4724 12 : tm->tm_mday = 1;
4725 : /* FALL THRU */
4726 1236 : case DTK_DAY:
4727 1236 : tm->tm_hour = 0;
4728 : /* FALL THRU */
4729 1260 : case DTK_HOUR:
4730 1260 : tm->tm_min = 0;
4731 : /* FALL THRU */
4732 1284 : case DTK_MINUTE:
4733 1284 : tm->tm_sec = 0;
4734 : /* FALL THRU */
4735 1308 : case DTK_SECOND:
4736 1308 : fsec = 0;
4737 1308 : break;
4738 :
4739 24 : case DTK_MILLISEC:
4740 24 : fsec = (fsec / 1000) * 1000;
4741 24 : break;
4742 :
4743 24 : case DTK_MICROSEC:
4744 24 : break;
4745 :
4746 0 : default:
4747 0 : ereport(ERROR,
4748 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
4749 : errmsg("unit \"%s\" not supported for type %s",
4750 : lowunits, format_type_be(TIMESTAMPOID))));
4751 : result = 0;
4752 : }
4753 :
4754 1386 : if (tm2timestamp(tm, fsec, NULL, &result) != 0)
4755 0 : ereport(ERROR,
4756 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
4757 : errmsg("timestamp out of range")));
4758 : }
4759 : else
4760 : {
4761 6 : ereport(ERROR,
4762 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4763 : errmsg("unit \"%s\" not recognized for type %s",
4764 : lowunits, format_type_be(TIMESTAMPOID))));
4765 : result = 0;
4766 : }
4767 :
4768 1386 : PG_RETURN_TIMESTAMP(result);
4769 : }
4770 :
4771 : /* timestamptz_bin()
4772 : * Bin timestamptz into specified interval using specified origin.
4773 : */
4774 : Datum
4775 132 : timestamptz_bin(PG_FUNCTION_ARGS)
4776 : {
4777 132 : Interval *stride = PG_GETARG_INTERVAL_P(0);
4778 132 : TimestampTz timestamp = PG_GETARG_TIMESTAMPTZ(1);
4779 132 : TimestampTz origin = PG_GETARG_TIMESTAMPTZ(2);
4780 : TimestampTz result,
4781 : stride_usecs,
4782 : tm_diff,
4783 : tm_modulo,
4784 : tm_delta;
4785 :
4786 132 : if (TIMESTAMP_NOT_FINITE(timestamp))
4787 0 : PG_RETURN_TIMESTAMPTZ(timestamp);
4788 :
4789 132 : if (TIMESTAMP_NOT_FINITE(origin))
4790 0 : ereport(ERROR,
4791 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
4792 : errmsg("origin out of range")));
4793 :
4794 132 : if (INTERVAL_NOT_FINITE(stride))
4795 0 : ereport(ERROR,
4796 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
4797 : errmsg("timestamps cannot be binned into infinite intervals")));
4798 :
4799 132 : if (stride->month != 0)
4800 12 : ereport(ERROR,
4801 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
4802 : errmsg("timestamps cannot be binned into intervals containing months or years")));
4803 :
4804 120 : if (unlikely(pg_mul_s64_overflow(stride->day, USECS_PER_DAY, &stride_usecs)) ||
4805 114 : unlikely(pg_add_s64_overflow(stride_usecs, stride->time, &stride_usecs)))
4806 6 : ereport(ERROR,
4807 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
4808 : errmsg("interval out of range")));
4809 :
4810 114 : if (stride_usecs <= 0)
4811 12 : ereport(ERROR,
4812 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
4813 : errmsg("stride must be greater than zero")));
4814 :
4815 102 : if (unlikely(pg_sub_s64_overflow(timestamp, origin, &tm_diff)))
4816 6 : ereport(ERROR,
4817 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
4818 : errmsg("interval out of range")));
4819 :
4820 : /* These calculations cannot overflow */
4821 96 : tm_modulo = tm_diff % stride_usecs;
4822 96 : tm_delta = tm_diff - tm_modulo;
4823 96 : result = origin + tm_delta;
4824 :
4825 : /*
4826 : * We want to round towards -infinity, not 0, when tm_diff is negative and
4827 : * not a multiple of stride_usecs. This adjustment *can* cause overflow,
4828 : * since the result might now be out of the range origin .. timestamp.
4829 : */
4830 96 : if (tm_modulo < 0)
4831 : {
4832 6 : if (unlikely(pg_sub_s64_overflow(result, stride_usecs, &result)) ||
4833 6 : !IS_VALID_TIMESTAMP(result))
4834 6 : ereport(ERROR,
4835 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
4836 : errmsg("timestamp out of range")));
4837 : }
4838 :
4839 90 : PG_RETURN_TIMESTAMPTZ(result);
4840 : }
4841 :
4842 : /*
4843 : * Common code for timestamptz_trunc() and timestamptz_trunc_zone().
4844 : *
4845 : * tzp identifies the zone to truncate with respect to. We assume
4846 : * infinite timestamps have already been rejected.
4847 : */
4848 : static TimestampTz
4849 1320 : timestamptz_trunc_internal(text *units, TimestampTz timestamp, pg_tz *tzp)
4850 : {
4851 : TimestampTz result;
4852 : int tz;
4853 : int type,
4854 : val;
4855 1320 : bool redotz = false;
4856 : char *lowunits;
4857 : fsec_t fsec;
4858 : struct pg_tm tt,
4859 1320 : *tm = &tt;
4860 :
4861 1320 : lowunits = downcase_truncate_identifier(VARDATA_ANY(units),
4862 1320 : VARSIZE_ANY_EXHDR(units),
4863 : false);
4864 :
4865 1320 : type = DecodeUnits(0, lowunits, &val);
4866 :
4867 1320 : if (type == UNITS)
4868 : {
4869 1308 : if (TIMESTAMP_NOT_FINITE(timestamp))
4870 : {
4871 : /*
4872 : * Errors thrown here for invalid units should exactly match those
4873 : * below, else there will be unexpected discrepancies between
4874 : * finite- and infinite-input cases.
4875 : */
4876 0 : switch (val)
4877 : {
4878 0 : case DTK_WEEK:
4879 : case DTK_MILLENNIUM:
4880 : case DTK_CENTURY:
4881 : case DTK_DECADE:
4882 : case DTK_YEAR:
4883 : case DTK_QUARTER:
4884 : case DTK_MONTH:
4885 : case DTK_DAY:
4886 : case DTK_HOUR:
4887 : case DTK_MINUTE:
4888 : case DTK_SECOND:
4889 : case DTK_MILLISEC:
4890 : case DTK_MICROSEC:
4891 0 : PG_RETURN_TIMESTAMPTZ(timestamp);
4892 : break;
4893 :
4894 0 : default:
4895 0 : ereport(ERROR,
4896 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
4897 : errmsg("unit \"%s\" not supported for type %s",
4898 : lowunits, format_type_be(TIMESTAMPTZOID))));
4899 : result = 0;
4900 : }
4901 : }
4902 :
4903 1308 : if (timestamp2tm(timestamp, &tz, tm, &fsec, NULL, tzp) != 0)
4904 0 : ereport(ERROR,
4905 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
4906 : errmsg("timestamp out of range")));
4907 :
4908 1308 : switch (val)
4909 : {
4910 6 : case DTK_WEEK:
4911 : {
4912 : int woy;
4913 :
4914 6 : woy = date2isoweek(tm->tm_year, tm->tm_mon, tm->tm_mday);
4915 :
4916 : /*
4917 : * If it is week 52/53 and the month is January, then the
4918 : * week must belong to the previous year. Also, some
4919 : * December dates belong to the next year.
4920 : */
4921 6 : if (woy >= 52 && tm->tm_mon == 1)
4922 0 : --tm->tm_year;
4923 6 : if (woy <= 1 && tm->tm_mon == MONTHS_PER_YEAR)
4924 0 : ++tm->tm_year;
4925 6 : isoweek2date(woy, &(tm->tm_year), &(tm->tm_mon), &(tm->tm_mday));
4926 6 : tm->tm_hour = 0;
4927 6 : tm->tm_min = 0;
4928 6 : tm->tm_sec = 0;
4929 6 : fsec = 0;
4930 6 : redotz = true;
4931 6 : break;
4932 : }
4933 : /* one may consider DTK_THOUSAND and DTK_HUNDRED... */
4934 6 : case DTK_MILLENNIUM:
4935 :
4936 : /*
4937 : * truncating to the millennium? what is this supposed to
4938 : * mean? let us put the first year of the millennium... i.e.
4939 : * -1000, 1, 1001, 2001...
4940 : */
4941 6 : if (tm->tm_year > 0)
4942 6 : tm->tm_year = ((tm->tm_year + 999) / 1000) * 1000 - 999;
4943 : else
4944 0 : tm->tm_year = -((999 - (tm->tm_year - 1)) / 1000) * 1000 + 1;
4945 : /* FALL THRU */
4946 : case DTK_CENTURY:
4947 : /* truncating to the century? as above: -100, 1, 101... */
4948 30 : if (tm->tm_year > 0)
4949 24 : tm->tm_year = ((tm->tm_year + 99) / 100) * 100 - 99;
4950 : else
4951 6 : tm->tm_year = -((99 - (tm->tm_year - 1)) / 100) * 100 + 1;
4952 : /* FALL THRU */
4953 : case DTK_DECADE:
4954 :
4955 : /*
4956 : * truncating to the decade? first year of the decade. must
4957 : * not be applied if year was truncated before!
4958 : */
4959 48 : if (val != DTK_MILLENNIUM && val != DTK_CENTURY)
4960 : {
4961 18 : if (tm->tm_year > 0)
4962 12 : tm->tm_year = (tm->tm_year / 10) * 10;
4963 : else
4964 6 : tm->tm_year = -((8 - (tm->tm_year - 1)) / 10) * 10;
4965 : }
4966 : /* FALL THRU */
4967 : case DTK_YEAR:
4968 48 : tm->tm_mon = 1;
4969 : /* FALL THRU */
4970 48 : case DTK_QUARTER:
4971 48 : tm->tm_mon = (3 * ((tm->tm_mon - 1) / 3)) + 1;
4972 : /* FALL THRU */
4973 48 : case DTK_MONTH:
4974 48 : tm->tm_mday = 1;
4975 : /* FALL THRU */
4976 1272 : case DTK_DAY:
4977 1272 : tm->tm_hour = 0;
4978 1272 : redotz = true; /* for all cases >= DAY */
4979 : /* FALL THRU */
4980 1278 : case DTK_HOUR:
4981 1278 : tm->tm_min = 0;
4982 : /* FALL THRU */
4983 1284 : case DTK_MINUTE:
4984 1284 : tm->tm_sec = 0;
4985 : /* FALL THRU */
4986 1290 : case DTK_SECOND:
4987 1290 : fsec = 0;
4988 1290 : break;
4989 6 : case DTK_MILLISEC:
4990 6 : fsec = (fsec / 1000) * 1000;
4991 6 : break;
4992 6 : case DTK_MICROSEC:
4993 6 : break;
4994 :
4995 0 : default:
4996 0 : ereport(ERROR,
4997 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
4998 : errmsg("unit \"%s\" not supported for type %s",
4999 : lowunits, format_type_be(TIMESTAMPTZOID))));
5000 : result = 0;
5001 : }
5002 :
5003 1308 : if (redotz)
5004 1278 : tz = DetermineTimeZoneOffset(tm, tzp);
5005 :
5006 1308 : if (tm2timestamp(tm, fsec, &tz, &result) != 0)
5007 0 : ereport(ERROR,
5008 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
5009 : errmsg("timestamp out of range")));
5010 : }
5011 : else
5012 : {
5013 12 : ereport(ERROR,
5014 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
5015 : errmsg("unit \"%s\" not recognized for type %s",
5016 : lowunits, format_type_be(TIMESTAMPTZOID))));
5017 : result = 0;
5018 : }
5019 :
5020 1308 : return result;
5021 : }
5022 :
5023 : /* timestamptz_trunc()
5024 : * Truncate timestamptz to specified units in session timezone.
5025 : */
5026 : Datum
5027 1260 : timestamptz_trunc(PG_FUNCTION_ARGS)
5028 : {
5029 1260 : text *units = PG_GETARG_TEXT_PP(0);
5030 1260 : TimestampTz timestamp = PG_GETARG_TIMESTAMPTZ(1);
5031 : TimestampTz result;
5032 :
5033 1260 : result = timestamptz_trunc_internal(units, timestamp, session_timezone);
5034 :
5035 1254 : PG_RETURN_TIMESTAMPTZ(result);
5036 : }
5037 :
5038 : /* timestamptz_trunc_zone()
5039 : * Truncate timestamptz to specified units in specified timezone.
5040 : */
5041 : Datum
5042 60 : timestamptz_trunc_zone(PG_FUNCTION_ARGS)
5043 : {
5044 60 : text *units = PG_GETARG_TEXT_PP(0);
5045 60 : TimestampTz timestamp = PG_GETARG_TIMESTAMPTZ(1);
5046 60 : text *zone = PG_GETARG_TEXT_PP(2);
5047 : TimestampTz result;
5048 : pg_tz *tzp;
5049 :
5050 : /*
5051 : * Look up the requested timezone.
5052 : */
5053 60 : tzp = lookup_timezone(zone);
5054 :
5055 60 : result = timestamptz_trunc_internal(units, timestamp, tzp);
5056 :
5057 54 : PG_RETURN_TIMESTAMPTZ(result);
5058 : }
5059 :
5060 : /* interval_trunc()
5061 : * Extract specified field from interval.
5062 : */
5063 : Datum
5064 24 : interval_trunc(PG_FUNCTION_ARGS)
5065 : {
5066 24 : text *units = PG_GETARG_TEXT_PP(0);
5067 24 : Interval *interval = PG_GETARG_INTERVAL_P(1);
5068 : Interval *result;
5069 : int type,
5070 : val;
5071 : char *lowunits;
5072 : struct pg_itm tt,
5073 24 : *tm = &tt;
5074 :
5075 24 : result = (Interval *) palloc(sizeof(Interval));
5076 :
5077 24 : lowunits = downcase_truncate_identifier(VARDATA_ANY(units),
5078 24 : VARSIZE_ANY_EXHDR(units),
5079 : false);
5080 :
5081 24 : type = DecodeUnits(0, lowunits, &val);
5082 :
5083 24 : if (type == UNITS)
5084 : {
5085 18 : if (INTERVAL_NOT_FINITE(interval))
5086 : {
5087 : /*
5088 : * Errors thrown here for invalid units should exactly match those
5089 : * below, else there will be unexpected discrepancies between
5090 : * finite- and infinite-input cases.
5091 : */
5092 18 : switch (val)
5093 : {
5094 12 : case DTK_MILLENNIUM:
5095 : case DTK_CENTURY:
5096 : case DTK_DECADE:
5097 : case DTK_YEAR:
5098 : case DTK_QUARTER:
5099 : case DTK_MONTH:
5100 : case DTK_DAY:
5101 : case DTK_HOUR:
5102 : case DTK_MINUTE:
5103 : case DTK_SECOND:
5104 : case DTK_MILLISEC:
5105 : case DTK_MICROSEC:
5106 12 : memcpy(result, interval, sizeof(Interval));
5107 12 : PG_RETURN_INTERVAL_P(result);
5108 : break;
5109 :
5110 6 : default:
5111 6 : ereport(ERROR,
5112 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
5113 : errmsg("unit \"%s\" not supported for type %s",
5114 : lowunits, format_type_be(INTERVALOID)),
5115 : (val == DTK_WEEK) ? errdetail("Months usually have fractional weeks.") : 0));
5116 : result = 0;
5117 : }
5118 : }
5119 :
5120 0 : interval2itm(*interval, tm);
5121 0 : switch (val)
5122 : {
5123 0 : case DTK_MILLENNIUM:
5124 : /* caution: C division may have negative remainder */
5125 0 : tm->tm_year = (tm->tm_year / 1000) * 1000;
5126 : /* FALL THRU */
5127 0 : case DTK_CENTURY:
5128 : /* caution: C division may have negative remainder */
5129 0 : tm->tm_year = (tm->tm_year / 100) * 100;
5130 : /* FALL THRU */
5131 0 : case DTK_DECADE:
5132 : /* caution: C division may have negative remainder */
5133 0 : tm->tm_year = (tm->tm_year / 10) * 10;
5134 : /* FALL THRU */
5135 0 : case DTK_YEAR:
5136 0 : tm->tm_mon = 0;
5137 : /* FALL THRU */
5138 0 : case DTK_QUARTER:
5139 0 : tm->tm_mon = 3 * (tm->tm_mon / 3);
5140 : /* FALL THRU */
5141 0 : case DTK_MONTH:
5142 0 : tm->tm_mday = 0;
5143 : /* FALL THRU */
5144 0 : case DTK_DAY:
5145 0 : tm->tm_hour = 0;
5146 : /* FALL THRU */
5147 0 : case DTK_HOUR:
5148 0 : tm->tm_min = 0;
5149 : /* FALL THRU */
5150 0 : case DTK_MINUTE:
5151 0 : tm->tm_sec = 0;
5152 : /* FALL THRU */
5153 0 : case DTK_SECOND:
5154 0 : tm->tm_usec = 0;
5155 0 : break;
5156 0 : case DTK_MILLISEC:
5157 0 : tm->tm_usec = (tm->tm_usec / 1000) * 1000;
5158 0 : break;
5159 0 : case DTK_MICROSEC:
5160 0 : break;
5161 :
5162 0 : default:
5163 0 : ereport(ERROR,
5164 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
5165 : errmsg("unit \"%s\" not supported for type %s",
5166 : lowunits, format_type_be(INTERVALOID)),
5167 : (val == DTK_WEEK) ? errdetail("Months usually have fractional weeks.") : 0));
5168 : }
5169 :
5170 0 : if (itm2interval(tm, result) != 0)
5171 0 : ereport(ERROR,
5172 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
5173 : errmsg("interval out of range")));
5174 : }
5175 : else
5176 : {
5177 6 : ereport(ERROR,
5178 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
5179 : errmsg("unit \"%s\" not recognized for type %s",
5180 : lowunits, format_type_be(INTERVALOID))));
5181 : }
5182 :
5183 0 : PG_RETURN_INTERVAL_P(result);
5184 : }
5185 :
5186 : /* isoweek2j()
5187 : *
5188 : * Return the Julian day which corresponds to the first day (Monday) of the given ISO 8601 year and week.
5189 : * Julian days are used to convert between ISO week dates and Gregorian dates.
5190 : *
5191 : * XXX: This function has integer overflow hazards, but restructuring it to
5192 : * work with the soft-error handling that its callers do is likely more
5193 : * trouble than it's worth.
5194 : */
5195 : int
5196 1590 : isoweek2j(int year, int week)
5197 : {
5198 : int day0,
5199 : day4;
5200 :
5201 : /* fourth day of current year */
5202 1590 : day4 = date2j(year, 1, 4);
5203 :
5204 : /* day0 == offset to first day of week (Monday) */
5205 1590 : day0 = j2day(day4 - 1);
5206 :
5207 1590 : return ((week - 1) * 7) + (day4 - day0);
5208 : }
5209 :
5210 : /* isoweek2date()
5211 : * Convert ISO week of year number to date.
5212 : * The year field must be specified with the ISO year!
5213 : * karel 2000/08/07
5214 : */
5215 : void
5216 36 : isoweek2date(int woy, int *year, int *mon, int *mday)
5217 : {
5218 36 : j2date(isoweek2j(*year, woy), year, mon, mday);
5219 36 : }
5220 :
5221 : /* isoweekdate2date()
5222 : *
5223 : * Convert an ISO 8601 week date (ISO year, ISO week) into a Gregorian date.
5224 : * Gregorian day of week sent so weekday strings can be supplied.
5225 : * Populates year, mon, and mday with the correct Gregorian values.
5226 : * year must be passed in as the ISO year.
5227 : */
5228 : void
5229 24 : isoweekdate2date(int isoweek, int wday, int *year, int *mon, int *mday)
5230 : {
5231 : int jday;
5232 :
5233 24 : jday = isoweek2j(*year, isoweek);
5234 : /* convert Gregorian week start (Sunday=1) to ISO week start (Monday=1) */
5235 24 : if (wday > 1)
5236 0 : jday += wday - 2;
5237 : else
5238 24 : jday += 6;
5239 24 : j2date(jday, year, mon, mday);
5240 24 : }
5241 :
5242 : /* date2isoweek()
5243 : *
5244 : * Returns ISO week number of year.
5245 : */
5246 : int
5247 2424 : date2isoweek(int year, int mon, int mday)
5248 : {
5249 : float8 result;
5250 : int day0,
5251 : day4,
5252 : dayn;
5253 :
5254 : /* current day */
5255 2424 : dayn = date2j(year, mon, mday);
5256 :
5257 : /* fourth day of current year */
5258 2424 : day4 = date2j(year, 1, 4);
5259 :
5260 : /* day0 == offset to first day of week (Monday) */
5261 2424 : day0 = j2day(day4 - 1);
5262 :
5263 : /*
5264 : * We need the first week containing a Thursday, otherwise this day falls
5265 : * into the previous year for purposes of counting weeks
5266 : */
5267 2424 : if (dayn < day4 - day0)
5268 : {
5269 36 : day4 = date2j(year - 1, 1, 4);
5270 :
5271 : /* day0 == offset to first day of week (Monday) */
5272 36 : day0 = j2day(day4 - 1);
5273 : }
5274 :
5275 2424 : result = (dayn - (day4 - day0)) / 7 + 1;
5276 :
5277 : /*
5278 : * Sometimes the last few days in a year will fall into the first week of
5279 : * the next year, so check for this.
5280 : */
5281 2424 : if (result >= 52)
5282 : {
5283 270 : day4 = date2j(year + 1, 1, 4);
5284 :
5285 : /* day0 == offset to first day of week (Monday) */
5286 270 : day0 = j2day(day4 - 1);
5287 :
5288 270 : if (dayn >= day4 - day0)
5289 162 : result = (dayn - (day4 - day0)) / 7 + 1;
5290 : }
5291 :
5292 2424 : return (int) result;
5293 : }
5294 :
5295 :
5296 : /* date2isoyear()
5297 : *
5298 : * Returns ISO 8601 year number.
5299 : * Note: zero or negative results follow the year-zero-exists convention.
5300 : */
5301 : int
5302 14586 : date2isoyear(int year, int mon, int mday)
5303 : {
5304 : float8 result;
5305 : int day0,
5306 : day4,
5307 : dayn;
5308 :
5309 : /* current day */
5310 14586 : dayn = date2j(year, mon, mday);
5311 :
5312 : /* fourth day of current year */
5313 14586 : day4 = date2j(year, 1, 4);
5314 :
5315 : /* day0 == offset to first day of week (Monday) */
5316 14586 : day0 = j2day(day4 - 1);
5317 :
5318 : /*
5319 : * We need the first week containing a Thursday, otherwise this day falls
5320 : * into the previous year for purposes of counting weeks
5321 : */
5322 14586 : if (dayn < day4 - day0)
5323 : {
5324 228 : day4 = date2j(year - 1, 1, 4);
5325 :
5326 : /* day0 == offset to first day of week (Monday) */
5327 228 : day0 = j2day(day4 - 1);
5328 :
5329 228 : year--;
5330 : }
5331 :
5332 14586 : result = (dayn - (day4 - day0)) / 7 + 1;
5333 :
5334 : /*
5335 : * Sometimes the last few days in a year will fall into the first week of
5336 : * the next year, so check for this.
5337 : */
5338 14586 : if (result >= 52)
5339 : {
5340 1710 : day4 = date2j(year + 1, 1, 4);
5341 :
5342 : /* day0 == offset to first day of week (Monday) */
5343 1710 : day0 = j2day(day4 - 1);
5344 :
5345 1710 : if (dayn >= day4 - day0)
5346 1026 : year++;
5347 : }
5348 :
5349 14586 : return year;
5350 : }
5351 :
5352 :
5353 : /* date2isoyearday()
5354 : *
5355 : * Returns the ISO 8601 day-of-year, given a Gregorian year, month and day.
5356 : * Possible return values are 1 through 371 (364 in non-leap years).
5357 : */
5358 : int
5359 1524 : date2isoyearday(int year, int mon, int mday)
5360 : {
5361 1524 : return date2j(year, mon, mday) - isoweek2j(date2isoyear(year, mon, mday), 1) + 1;
5362 : }
5363 :
5364 : /*
5365 : * NonFiniteTimestampTzPart
5366 : *
5367 : * Used by timestamp_part and timestamptz_part when extracting from infinite
5368 : * timestamp[tz]. Returns +/-Infinity if that is the appropriate result,
5369 : * otherwise returns zero (which should be taken as meaning to return NULL).
5370 : *
5371 : * Errors thrown here for invalid units should exactly match those that
5372 : * would be thrown in the calling functions, else there will be unexpected
5373 : * discrepancies between finite- and infinite-input cases.
5374 : */
5375 : static float8
5376 612 : NonFiniteTimestampTzPart(int type, int unit, char *lowunits,
5377 : bool isNegative, bool isTz)
5378 : {
5379 612 : if ((type != UNITS) && (type != RESERV))
5380 0 : ereport(ERROR,
5381 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
5382 : errmsg("unit \"%s\" not recognized for type %s",
5383 : lowunits,
5384 : format_type_be(isTz ? TIMESTAMPTZOID : TIMESTAMPOID))));
5385 :
5386 612 : switch (unit)
5387 : {
5388 : /* Oscillating units */
5389 396 : case DTK_MICROSEC:
5390 : case DTK_MILLISEC:
5391 : case DTK_SECOND:
5392 : case DTK_MINUTE:
5393 : case DTK_HOUR:
5394 : case DTK_DAY:
5395 : case DTK_MONTH:
5396 : case DTK_QUARTER:
5397 : case DTK_WEEK:
5398 : case DTK_DOW:
5399 : case DTK_ISODOW:
5400 : case DTK_DOY:
5401 : case DTK_TZ:
5402 : case DTK_TZ_MINUTE:
5403 : case DTK_TZ_HOUR:
5404 396 : return 0.0;
5405 :
5406 : /* Monotonically-increasing units */
5407 216 : case DTK_YEAR:
5408 : case DTK_DECADE:
5409 : case DTK_CENTURY:
5410 : case DTK_MILLENNIUM:
5411 : case DTK_JULIAN:
5412 : case DTK_ISOYEAR:
5413 : case DTK_EPOCH:
5414 216 : if (isNegative)
5415 108 : return -get_float8_infinity();
5416 : else
5417 108 : return get_float8_infinity();
5418 :
5419 0 : default:
5420 0 : ereport(ERROR,
5421 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
5422 : errmsg("unit \"%s\" not supported for type %s",
5423 : lowunits,
5424 : format_type_be(isTz ? TIMESTAMPTZOID : TIMESTAMPOID))));
5425 : return 0.0; /* keep compiler quiet */
5426 : }
5427 : }
5428 :
5429 : /* timestamp_part() and extract_timestamp()
5430 : * Extract specified field from timestamp.
5431 : */
5432 : static Datum
5433 10722 : timestamp_part_common(PG_FUNCTION_ARGS, bool retnumeric)
5434 : {
5435 10722 : text *units = PG_GETARG_TEXT_PP(0);
5436 10722 : Timestamp timestamp = PG_GETARG_TIMESTAMP(1);
5437 : int64 intresult;
5438 : Timestamp epoch;
5439 : int type,
5440 : val;
5441 : char *lowunits;
5442 : fsec_t fsec;
5443 : struct pg_tm tt,
5444 10722 : *tm = &tt;
5445 :
5446 10722 : lowunits = downcase_truncate_identifier(VARDATA_ANY(units),
5447 10722 : VARSIZE_ANY_EXHDR(units),
5448 : false);
5449 :
5450 10722 : type = DecodeUnits(0, lowunits, &val);
5451 10722 : if (type == UNKNOWN_FIELD)
5452 3714 : type = DecodeSpecial(0, lowunits, &val);
5453 :
5454 10722 : if (TIMESTAMP_NOT_FINITE(timestamp))
5455 : {
5456 288 : double r = NonFiniteTimestampTzPart(type, val, lowunits,
5457 : TIMESTAMP_IS_NOBEGIN(timestamp),
5458 : false);
5459 :
5460 288 : if (r != 0.0)
5461 : {
5462 108 : if (retnumeric)
5463 : {
5464 24 : if (r < 0)
5465 12 : return DirectFunctionCall3(numeric_in,
5466 : CStringGetDatum("-Infinity"),
5467 : ObjectIdGetDatum(InvalidOid),
5468 : Int32GetDatum(-1));
5469 12 : else if (r > 0)
5470 12 : return DirectFunctionCall3(numeric_in,
5471 : CStringGetDatum("Infinity"),
5472 : ObjectIdGetDatum(InvalidOid),
5473 : Int32GetDatum(-1));
5474 : }
5475 : else
5476 84 : PG_RETURN_FLOAT8(r);
5477 : }
5478 : else
5479 180 : PG_RETURN_NULL();
5480 : }
5481 :
5482 10434 : if (type == UNITS)
5483 : {
5484 9564 : if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL, NULL) != 0)
5485 0 : ereport(ERROR,
5486 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
5487 : errmsg("timestamp out of range")));
5488 :
5489 9564 : switch (val)
5490 : {
5491 756 : case DTK_MICROSEC:
5492 756 : intresult = tm->tm_sec * INT64CONST(1000000) + fsec;
5493 756 : break;
5494 :
5495 756 : case DTK_MILLISEC:
5496 756 : if (retnumeric)
5497 : /*---
5498 : * tm->tm_sec * 1000 + fsec / 1000
5499 : * = (tm->tm_sec * 1'000'000 + fsec) / 1000
5500 : */
5501 378 : PG_RETURN_NUMERIC(int64_div_fast_to_numeric(tm->tm_sec * INT64CONST(1000000) + fsec, 3));
5502 : else
5503 378 : PG_RETURN_FLOAT8(tm->tm_sec * 1000.0 + fsec / 1000.0);
5504 : break;
5505 :
5506 756 : case DTK_SECOND:
5507 756 : if (retnumeric)
5508 : /*---
5509 : * tm->tm_sec + fsec / 1'000'000
5510 : * = (tm->tm_sec * 1'000'000 + fsec) / 1'000'000
5511 : */
5512 378 : PG_RETURN_NUMERIC(int64_div_fast_to_numeric(tm->tm_sec * INT64CONST(1000000) + fsec, 6));
5513 : else
5514 378 : PG_RETURN_FLOAT8(tm->tm_sec + fsec / 1000000.0);
5515 : break;
5516 :
5517 378 : case DTK_MINUTE:
5518 378 : intresult = tm->tm_min;
5519 378 : break;
5520 :
5521 378 : case DTK_HOUR:
5522 378 : intresult = tm->tm_hour;
5523 378 : break;
5524 :
5525 474 : case DTK_DAY:
5526 474 : intresult = tm->tm_mday;
5527 474 : break;
5528 :
5529 474 : case DTK_MONTH:
5530 474 : intresult = tm->tm_mon;
5531 474 : break;
5532 :
5533 474 : case DTK_QUARTER:
5534 474 : intresult = (tm->tm_mon - 1) / 3 + 1;
5535 474 : break;
5536 :
5537 474 : case DTK_WEEK:
5538 474 : intresult = date2isoweek(tm->tm_year, tm->tm_mon, tm->tm_mday);
5539 474 : break;
5540 :
5541 474 : case DTK_YEAR:
5542 474 : if (tm->tm_year > 0)
5543 462 : intresult = tm->tm_year;
5544 : else
5545 : /* there is no year 0, just 1 BC and 1 AD */
5546 12 : intresult = tm->tm_year - 1;
5547 474 : break;
5548 :
5549 474 : case DTK_DECADE:
5550 :
5551 : /*
5552 : * what is a decade wrt dates? let us assume that decade 199
5553 : * is 1990 thru 1999... decade 0 starts on year 1 BC, and -1
5554 : * is 11 BC thru 2 BC...
5555 : */
5556 474 : if (tm->tm_year >= 0)
5557 462 : intresult = tm->tm_year / 10;
5558 : else
5559 12 : intresult = -((8 - (tm->tm_year - 1)) / 10);
5560 474 : break;
5561 :
5562 474 : case DTK_CENTURY:
5563 :
5564 : /* ----
5565 : * centuries AD, c>0: year in [ (c-1)* 100 + 1 : c*100 ]
5566 : * centuries BC, c<0: year in [ c*100 : (c+1) * 100 - 1]
5567 : * there is no number 0 century.
5568 : * ----
5569 : */
5570 474 : if (tm->tm_year > 0)
5571 462 : intresult = (tm->tm_year + 99) / 100;
5572 : else
5573 : /* caution: C division may have negative remainder */
5574 12 : intresult = -((99 - (tm->tm_year - 1)) / 100);
5575 474 : break;
5576 :
5577 474 : case DTK_MILLENNIUM:
5578 : /* see comments above. */
5579 474 : if (tm->tm_year > 0)
5580 462 : intresult = (tm->tm_year + 999) / 1000;
5581 : else
5582 12 : intresult = -((999 - (tm->tm_year - 1)) / 1000);
5583 474 : break;
5584 :
5585 852 : case DTK_JULIAN:
5586 852 : if (retnumeric)
5587 378 : PG_RETURN_NUMERIC(numeric_add_opt_error(int64_to_numeric(date2j(tm->tm_year, tm->tm_mon, tm->tm_mday)),
5588 : numeric_div_opt_error(int64_to_numeric(((((tm->tm_hour * MINS_PER_HOUR) + tm->tm_min) * SECS_PER_MINUTE) + tm->tm_sec) * INT64CONST(1000000) + fsec),
5589 : int64_to_numeric(SECS_PER_DAY * INT64CONST(1000000)),
5590 : NULL),
5591 : NULL));
5592 : else
5593 474 : PG_RETURN_FLOAT8(date2j(tm->tm_year, tm->tm_mon, tm->tm_mday) +
5594 : ((((tm->tm_hour * MINS_PER_HOUR) + tm->tm_min) * SECS_PER_MINUTE) +
5595 : tm->tm_sec + (fsec / 1000000.0)) / (double) SECS_PER_DAY);
5596 : break;
5597 :
5598 474 : case DTK_ISOYEAR:
5599 474 : intresult = date2isoyear(tm->tm_year, tm->tm_mon, tm->tm_mday);
5600 : /* Adjust BC years */
5601 474 : if (intresult <= 0)
5602 12 : intresult -= 1;
5603 474 : break;
5604 :
5605 948 : case DTK_DOW:
5606 : case DTK_ISODOW:
5607 948 : intresult = j2day(date2j(tm->tm_year, tm->tm_mon, tm->tm_mday));
5608 948 : if (val == DTK_ISODOW && intresult == 0)
5609 30 : intresult = 7;
5610 948 : break;
5611 :
5612 474 : case DTK_DOY:
5613 474 : intresult = (date2j(tm->tm_year, tm->tm_mon, tm->tm_mday)
5614 474 : - date2j(tm->tm_year, 1, 1) + 1);
5615 474 : break;
5616 :
5617 0 : case DTK_TZ:
5618 : case DTK_TZ_MINUTE:
5619 : case DTK_TZ_HOUR:
5620 : default:
5621 0 : ereport(ERROR,
5622 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
5623 : errmsg("unit \"%s\" not supported for type %s",
5624 : lowunits, format_type_be(TIMESTAMPOID))));
5625 : intresult = 0;
5626 : }
5627 : }
5628 870 : else if (type == RESERV)
5629 : {
5630 870 : switch (val)
5631 : {
5632 870 : case DTK_EPOCH:
5633 870 : epoch = SetEpochTimestamp();
5634 : /* (timestamp - epoch) / 1000000 */
5635 870 : if (retnumeric)
5636 : {
5637 : Numeric result;
5638 :
5639 390 : if (timestamp < (PG_INT64_MAX + epoch))
5640 384 : result = int64_div_fast_to_numeric(timestamp - epoch, 6);
5641 : else
5642 : {
5643 6 : result = numeric_div_opt_error(numeric_sub_opt_error(int64_to_numeric(timestamp),
5644 : int64_to_numeric(epoch),
5645 : NULL),
5646 : int64_to_numeric(1000000),
5647 : NULL);
5648 6 : result = DatumGetNumeric(DirectFunctionCall2(numeric_round,
5649 : NumericGetDatum(result),
5650 : Int32GetDatum(6)));
5651 : }
5652 390 : PG_RETURN_NUMERIC(result);
5653 : }
5654 : else
5655 : {
5656 : float8 result;
5657 :
5658 : /* try to avoid precision loss in subtraction */
5659 480 : if (timestamp < (PG_INT64_MAX + epoch))
5660 474 : result = (timestamp - epoch) / 1000000.0;
5661 : else
5662 6 : result = ((float8) timestamp - epoch) / 1000000.0;
5663 480 : PG_RETURN_FLOAT8(result);
5664 : }
5665 : break;
5666 :
5667 0 : default:
5668 0 : ereport(ERROR,
5669 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
5670 : errmsg("unit \"%s\" not supported for type %s",
5671 : lowunits, format_type_be(TIMESTAMPOID))));
5672 : intresult = 0;
5673 : }
5674 : }
5675 : else
5676 : {
5677 0 : ereport(ERROR,
5678 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
5679 : errmsg("unit \"%s\" not recognized for type %s",
5680 : lowunits, format_type_be(TIMESTAMPOID))));
5681 : intresult = 0;
5682 : }
5683 :
5684 7200 : if (retnumeric)
5685 378 : PG_RETURN_NUMERIC(int64_to_numeric(intresult));
5686 : else
5687 6822 : PG_RETURN_FLOAT8(intresult);
5688 : }
5689 :
5690 : Datum
5691 8760 : timestamp_part(PG_FUNCTION_ARGS)
5692 : {
5693 8760 : return timestamp_part_common(fcinfo, false);
5694 : }
5695 :
5696 : Datum
5697 1962 : extract_timestamp(PG_FUNCTION_ARGS)
5698 : {
5699 1962 : return timestamp_part_common(fcinfo, true);
5700 : }
5701 :
5702 : /* timestamptz_part() and extract_timestamptz()
5703 : * Extract specified field from timestamp with time zone.
5704 : */
5705 : static Datum
5706 37384 : timestamptz_part_common(PG_FUNCTION_ARGS, bool retnumeric)
5707 : {
5708 37384 : text *units = PG_GETARG_TEXT_PP(0);
5709 37384 : TimestampTz timestamp = PG_GETARG_TIMESTAMPTZ(1);
5710 : int64 intresult;
5711 : Timestamp epoch;
5712 : int tz;
5713 : int type,
5714 : val;
5715 : char *lowunits;
5716 : fsec_t fsec;
5717 : struct pg_tm tt,
5718 37384 : *tm = &tt;
5719 :
5720 37384 : lowunits = downcase_truncate_identifier(VARDATA_ANY(units),
5721 37384 : VARSIZE_ANY_EXHDR(units),
5722 : false);
5723 :
5724 37384 : type = DecodeUnits(0, lowunits, &val);
5725 37384 : if (type == UNKNOWN_FIELD)
5726 29860 : type = DecodeSpecial(0, lowunits, &val);
5727 :
5728 37384 : if (TIMESTAMP_NOT_FINITE(timestamp))
5729 : {
5730 324 : double r = NonFiniteTimestampTzPart(type, val, lowunits,
5731 : TIMESTAMP_IS_NOBEGIN(timestamp),
5732 : true);
5733 :
5734 324 : if (r != 0.0)
5735 : {
5736 108 : if (retnumeric)
5737 : {
5738 24 : if (r < 0)
5739 12 : return DirectFunctionCall3(numeric_in,
5740 : CStringGetDatum("-Infinity"),
5741 : ObjectIdGetDatum(InvalidOid),
5742 : Int32GetDatum(-1));
5743 12 : else if (r > 0)
5744 12 : return DirectFunctionCall3(numeric_in,
5745 : CStringGetDatum("Infinity"),
5746 : ObjectIdGetDatum(InvalidOid),
5747 : Int32GetDatum(-1));
5748 : }
5749 : else
5750 84 : PG_RETURN_FLOAT8(r);
5751 : }
5752 : else
5753 216 : PG_RETURN_NULL();
5754 : }
5755 :
5756 37060 : if (type == UNITS)
5757 : {
5758 9600 : if (timestamp2tm(timestamp, &tz, tm, &fsec, NULL, NULL) != 0)
5759 0 : ereport(ERROR,
5760 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
5761 : errmsg("timestamp out of range")));
5762 :
5763 9600 : switch (val)
5764 : {
5765 384 : case DTK_TZ:
5766 384 : intresult = -tz;
5767 384 : break;
5768 :
5769 384 : case DTK_TZ_MINUTE:
5770 384 : intresult = (-tz / SECS_PER_MINUTE) % MINS_PER_HOUR;
5771 384 : break;
5772 :
5773 384 : case DTK_TZ_HOUR:
5774 384 : intresult = -tz / SECS_PER_HOUR;
5775 384 : break;
5776 :
5777 768 : case DTK_MICROSEC:
5778 768 : intresult = tm->tm_sec * INT64CONST(1000000) + fsec;
5779 768 : break;
5780 :
5781 768 : case DTK_MILLISEC:
5782 768 : if (retnumeric)
5783 : /*---
5784 : * tm->tm_sec * 1000 + fsec / 1000
5785 : * = (tm->tm_sec * 1'000'000 + fsec) / 1000
5786 : */
5787 384 : PG_RETURN_NUMERIC(int64_div_fast_to_numeric(tm->tm_sec * INT64CONST(1000000) + fsec, 3));
5788 : else
5789 384 : PG_RETURN_FLOAT8(tm->tm_sec * 1000.0 + fsec / 1000.0);
5790 : break;
5791 :
5792 768 : case DTK_SECOND:
5793 768 : if (retnumeric)
5794 : /*---
5795 : * tm->tm_sec + fsec / 1'000'000
5796 : * = (tm->tm_sec * 1'000'000 + fsec) / 1'000'000
5797 : */
5798 384 : PG_RETURN_NUMERIC(int64_div_fast_to_numeric(tm->tm_sec * INT64CONST(1000000) + fsec, 6));
5799 : else
5800 384 : PG_RETURN_FLOAT8(tm->tm_sec + fsec / 1000000.0);
5801 : break;
5802 :
5803 384 : case DTK_MINUTE:
5804 384 : intresult = tm->tm_min;
5805 384 : break;
5806 :
5807 384 : case DTK_HOUR:
5808 384 : intresult = tm->tm_hour;
5809 384 : break;
5810 :
5811 384 : case DTK_DAY:
5812 384 : intresult = tm->tm_mday;
5813 384 : break;
5814 :
5815 384 : case DTK_MONTH:
5816 384 : intresult = tm->tm_mon;
5817 384 : break;
5818 :
5819 384 : case DTK_QUARTER:
5820 384 : intresult = (tm->tm_mon - 1) / 3 + 1;
5821 384 : break;
5822 :
5823 384 : case DTK_WEEK:
5824 384 : intresult = date2isoweek(tm->tm_year, tm->tm_mon, tm->tm_mday);
5825 384 : break;
5826 :
5827 384 : case DTK_YEAR:
5828 384 : if (tm->tm_year > 0)
5829 378 : intresult = tm->tm_year;
5830 : else
5831 : /* there is no year 0, just 1 BC and 1 AD */
5832 6 : intresult = tm->tm_year - 1;
5833 384 : break;
5834 :
5835 384 : case DTK_DECADE:
5836 : /* see comments in timestamp_part */
5837 384 : if (tm->tm_year > 0)
5838 378 : intresult = tm->tm_year / 10;
5839 : else
5840 6 : intresult = -((8 - (tm->tm_year - 1)) / 10);
5841 384 : break;
5842 :
5843 384 : case DTK_CENTURY:
5844 : /* see comments in timestamp_part */
5845 384 : if (tm->tm_year > 0)
5846 378 : intresult = (tm->tm_year + 99) / 100;
5847 : else
5848 6 : intresult = -((99 - (tm->tm_year - 1)) / 100);
5849 384 : break;
5850 :
5851 384 : case DTK_MILLENNIUM:
5852 : /* see comments in timestamp_part */
5853 384 : if (tm->tm_year > 0)
5854 378 : intresult = (tm->tm_year + 999) / 1000;
5855 : else
5856 6 : intresult = -((999 - (tm->tm_year - 1)) / 1000);
5857 384 : break;
5858 :
5859 768 : case DTK_JULIAN:
5860 768 : if (retnumeric)
5861 384 : PG_RETURN_NUMERIC(numeric_add_opt_error(int64_to_numeric(date2j(tm->tm_year, tm->tm_mon, tm->tm_mday)),
5862 : numeric_div_opt_error(int64_to_numeric(((((tm->tm_hour * MINS_PER_HOUR) + tm->tm_min) * SECS_PER_MINUTE) + tm->tm_sec) * INT64CONST(1000000) + fsec),
5863 : int64_to_numeric(SECS_PER_DAY * INT64CONST(1000000)),
5864 : NULL),
5865 : NULL));
5866 : else
5867 384 : PG_RETURN_FLOAT8(date2j(tm->tm_year, tm->tm_mon, tm->tm_mday) +
5868 : ((((tm->tm_hour * MINS_PER_HOUR) + tm->tm_min) * SECS_PER_MINUTE) +
5869 : tm->tm_sec + (fsec / 1000000.0)) / (double) SECS_PER_DAY);
5870 : break;
5871 :
5872 384 : case DTK_ISOYEAR:
5873 384 : intresult = date2isoyear(tm->tm_year, tm->tm_mon, tm->tm_mday);
5874 : /* Adjust BC years */
5875 384 : if (intresult <= 0)
5876 6 : intresult -= 1;
5877 384 : break;
5878 :
5879 768 : case DTK_DOW:
5880 : case DTK_ISODOW:
5881 768 : intresult = j2day(date2j(tm->tm_year, tm->tm_mon, tm->tm_mday));
5882 768 : if (val == DTK_ISODOW && intresult == 0)
5883 18 : intresult = 7;
5884 768 : break;
5885 :
5886 384 : case DTK_DOY:
5887 384 : intresult = (date2j(tm->tm_year, tm->tm_mon, tm->tm_mday)
5888 384 : - date2j(tm->tm_year, 1, 1) + 1);
5889 384 : break;
5890 :
5891 0 : default:
5892 0 : ereport(ERROR,
5893 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
5894 : errmsg("unit \"%s\" not supported for type %s",
5895 : lowunits, format_type_be(TIMESTAMPTZOID))));
5896 : intresult = 0;
5897 : }
5898 : }
5899 27460 : else if (type == RESERV)
5900 : {
5901 27460 : switch (val)
5902 : {
5903 27460 : case DTK_EPOCH:
5904 27460 : epoch = SetEpochTimestamp();
5905 : /* (timestamp - epoch) / 1000000 */
5906 27460 : if (retnumeric)
5907 : {
5908 : Numeric result;
5909 :
5910 27070 : if (timestamp < (PG_INT64_MAX + epoch))
5911 27064 : result = int64_div_fast_to_numeric(timestamp - epoch, 6);
5912 : else
5913 : {
5914 6 : result = numeric_div_opt_error(numeric_sub_opt_error(int64_to_numeric(timestamp),
5915 : int64_to_numeric(epoch),
5916 : NULL),
5917 : int64_to_numeric(1000000),
5918 : NULL);
5919 6 : result = DatumGetNumeric(DirectFunctionCall2(numeric_round,
5920 : NumericGetDatum(result),
5921 : Int32GetDatum(6)));
5922 : }
5923 27070 : PG_RETURN_NUMERIC(result);
5924 : }
5925 : else
5926 : {
5927 : float8 result;
5928 :
5929 : /* try to avoid precision loss in subtraction */
5930 390 : if (timestamp < (PG_INT64_MAX + epoch))
5931 384 : result = (timestamp - epoch) / 1000000.0;
5932 : else
5933 6 : result = ((float8) timestamp - epoch) / 1000000.0;
5934 390 : PG_RETURN_FLOAT8(result);
5935 : }
5936 : break;
5937 :
5938 0 : default:
5939 0 : ereport(ERROR,
5940 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
5941 : errmsg("unit \"%s\" not supported for type %s",
5942 : lowunits, format_type_be(TIMESTAMPTZOID))));
5943 : intresult = 0;
5944 : }
5945 : }
5946 : else
5947 : {
5948 0 : ereport(ERROR,
5949 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
5950 : errmsg("unit \"%s\" not recognized for type %s",
5951 : lowunits, format_type_be(TIMESTAMPTZOID))));
5952 :
5953 : intresult = 0;
5954 : }
5955 :
5956 7296 : if (retnumeric)
5957 384 : PG_RETURN_NUMERIC(int64_to_numeric(intresult));
5958 : else
5959 6912 : PG_RETURN_FLOAT8(intresult);
5960 : }
5961 :
5962 : Datum
5963 8718 : timestamptz_part(PG_FUNCTION_ARGS)
5964 : {
5965 8718 : return timestamptz_part_common(fcinfo, false);
5966 : }
5967 :
5968 : Datum
5969 28666 : extract_timestamptz(PG_FUNCTION_ARGS)
5970 : {
5971 28666 : return timestamptz_part_common(fcinfo, true);
5972 : }
5973 :
5974 : /*
5975 : * NonFiniteIntervalPart
5976 : *
5977 : * Used by interval_part when extracting from infinite interval. Returns
5978 : * +/-Infinity if that is the appropriate result, otherwise returns zero
5979 : * (which should be taken as meaning to return NULL).
5980 : *
5981 : * Errors thrown here for invalid units should exactly match those that
5982 : * would be thrown in the calling functions, else there will be unexpected
5983 : * discrepancies between finite- and infinite-input cases.
5984 : */
5985 : static float8
5986 384 : NonFiniteIntervalPart(int type, int unit, char *lowunits, bool isNegative)
5987 : {
5988 384 : if ((type != UNITS) && (type != RESERV))
5989 0 : ereport(ERROR,
5990 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
5991 : errmsg("unit \"%s\" not recognized for type %s",
5992 : lowunits, format_type_be(INTERVALOID))));
5993 :
5994 384 : switch (unit)
5995 : {
5996 : /* Oscillating units */
5997 204 : case DTK_MICROSEC:
5998 : case DTK_MILLISEC:
5999 : case DTK_SECOND:
6000 : case DTK_MINUTE:
6001 : case DTK_WEEK:
6002 : case DTK_MONTH:
6003 : case DTK_QUARTER:
6004 204 : return 0.0;
6005 :
6006 : /* Monotonically-increasing units */
6007 180 : case DTK_HOUR:
6008 : case DTK_DAY:
6009 : case DTK_YEAR:
6010 : case DTK_DECADE:
6011 : case DTK_CENTURY:
6012 : case DTK_MILLENNIUM:
6013 : case DTK_EPOCH:
6014 180 : if (isNegative)
6015 90 : return -get_float8_infinity();
6016 : else
6017 90 : return get_float8_infinity();
6018 :
6019 0 : default:
6020 0 : ereport(ERROR,
6021 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
6022 : errmsg("unit \"%s\" not supported for type %s",
6023 : lowunits, format_type_be(INTERVALOID))));
6024 : return 0.0; /* keep compiler quiet */
6025 : }
6026 : }
6027 :
6028 : /* interval_part() and extract_interval()
6029 : * Extract specified field from interval.
6030 : */
6031 : static Datum
6032 2376 : interval_part_common(PG_FUNCTION_ARGS, bool retnumeric)
6033 : {
6034 2376 : text *units = PG_GETARG_TEXT_PP(0);
6035 2376 : Interval *interval = PG_GETARG_INTERVAL_P(1);
6036 : int64 intresult;
6037 : int type,
6038 : val;
6039 : char *lowunits;
6040 : struct pg_itm tt,
6041 2376 : *tm = &tt;
6042 :
6043 2376 : lowunits = downcase_truncate_identifier(VARDATA_ANY(units),
6044 2376 : VARSIZE_ANY_EXHDR(units),
6045 : false);
6046 :
6047 2376 : type = DecodeUnits(0, lowunits, &val);
6048 2376 : if (type == UNKNOWN_FIELD)
6049 234 : type = DecodeSpecial(0, lowunits, &val);
6050 :
6051 2376 : if (INTERVAL_NOT_FINITE(interval))
6052 : {
6053 384 : double r = NonFiniteIntervalPart(type, val, lowunits,
6054 384 : INTERVAL_IS_NOBEGIN(interval));
6055 :
6056 384 : if (r != 0.0)
6057 : {
6058 180 : if (retnumeric)
6059 : {
6060 168 : if (r < 0)
6061 84 : return DirectFunctionCall3(numeric_in,
6062 : CStringGetDatum("-Infinity"),
6063 : ObjectIdGetDatum(InvalidOid),
6064 : Int32GetDatum(-1));
6065 84 : else if (r > 0)
6066 84 : return DirectFunctionCall3(numeric_in,
6067 : CStringGetDatum("Infinity"),
6068 : ObjectIdGetDatum(InvalidOid),
6069 : Int32GetDatum(-1));
6070 : }
6071 : else
6072 12 : PG_RETURN_FLOAT8(r);
6073 : }
6074 : else
6075 204 : PG_RETURN_NULL();
6076 : }
6077 :
6078 1992 : if (type == UNITS)
6079 : {
6080 1794 : interval2itm(*interval, tm);
6081 1794 : switch (val)
6082 : {
6083 180 : case DTK_MICROSEC:
6084 180 : intresult = tm->tm_sec * INT64CONST(1000000) + tm->tm_usec;
6085 180 : break;
6086 :
6087 180 : case DTK_MILLISEC:
6088 180 : if (retnumeric)
6089 : /*---
6090 : * tm->tm_sec * 1000 + fsec / 1000
6091 : * = (tm->tm_sec * 1'000'000 + fsec) / 1000
6092 : */
6093 120 : PG_RETURN_NUMERIC(int64_div_fast_to_numeric(tm->tm_sec * INT64CONST(1000000) + tm->tm_usec, 3));
6094 : else
6095 60 : PG_RETURN_FLOAT8(tm->tm_sec * 1000.0 + tm->tm_usec / 1000.0);
6096 : break;
6097 :
6098 180 : case DTK_SECOND:
6099 180 : if (retnumeric)
6100 : /*---
6101 : * tm->tm_sec + fsec / 1'000'000
6102 : * = (tm->tm_sec * 1'000'000 + fsec) / 1'000'000
6103 : */
6104 120 : PG_RETURN_NUMERIC(int64_div_fast_to_numeric(tm->tm_sec * INT64CONST(1000000) + tm->tm_usec, 6));
6105 : else
6106 60 : PG_RETURN_FLOAT8(tm->tm_sec + tm->tm_usec / 1000000.0);
6107 : break;
6108 :
6109 120 : case DTK_MINUTE:
6110 120 : intresult = tm->tm_min;
6111 120 : break;
6112 :
6113 120 : case DTK_HOUR:
6114 120 : intresult = tm->tm_hour;
6115 120 : break;
6116 :
6117 120 : case DTK_DAY:
6118 120 : intresult = tm->tm_mday;
6119 120 : break;
6120 :
6121 120 : case DTK_WEEK:
6122 120 : intresult = tm->tm_mday / 7;
6123 120 : break;
6124 :
6125 120 : case DTK_MONTH:
6126 120 : intresult = tm->tm_mon;
6127 120 : break;
6128 :
6129 120 : case DTK_QUARTER:
6130 :
6131 : /*
6132 : * We want to maintain the rule that a field extracted from a
6133 : * negative interval is the negative of the field's value for
6134 : * the sign-reversed interval. The broken-down tm_year and
6135 : * tm_mon aren't very helpful for that, so work from
6136 : * interval->month.
6137 : */
6138 120 : if (interval->month >= 0)
6139 90 : intresult = (tm->tm_mon / 3) + 1;
6140 : else
6141 30 : intresult = -(((-interval->month % MONTHS_PER_YEAR) / 3) + 1);
6142 120 : break;
6143 :
6144 120 : case DTK_YEAR:
6145 120 : intresult = tm->tm_year;
6146 120 : break;
6147 :
6148 144 : case DTK_DECADE:
6149 : /* caution: C division may have negative remainder */
6150 144 : intresult = tm->tm_year / 10;
6151 144 : break;
6152 :
6153 144 : case DTK_CENTURY:
6154 : /* caution: C division may have negative remainder */
6155 144 : intresult = tm->tm_year / 100;
6156 144 : break;
6157 :
6158 120 : case DTK_MILLENNIUM:
6159 : /* caution: C division may have negative remainder */
6160 120 : intresult = tm->tm_year / 1000;
6161 120 : break;
6162 :
6163 6 : default:
6164 6 : ereport(ERROR,
6165 : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
6166 : errmsg("unit \"%s\" not supported for type %s",
6167 : lowunits, format_type_be(INTERVALOID))));
6168 : intresult = 0;
6169 : }
6170 : }
6171 198 : else if (type == RESERV && val == DTK_EPOCH)
6172 : {
6173 192 : if (retnumeric)
6174 : {
6175 : Numeric result;
6176 : int64 secs_from_day_month;
6177 : int64 val;
6178 :
6179 : /*
6180 : * To do this calculation in integer arithmetic even though
6181 : * DAYS_PER_YEAR is fractional, multiply everything by 4 and then
6182 : * divide by 4 again at the end. This relies on DAYS_PER_YEAR
6183 : * being a multiple of 0.25 and on SECS_PER_DAY being a multiple
6184 : * of 4.
6185 : */
6186 132 : secs_from_day_month = ((int64) (4 * DAYS_PER_YEAR) * (interval->month / MONTHS_PER_YEAR) +
6187 132 : (int64) (4 * DAYS_PER_MONTH) * (interval->month % MONTHS_PER_YEAR) +
6188 132 : (int64) 4 * interval->day) * (SECS_PER_DAY / 4);
6189 :
6190 : /*---
6191 : * result = secs_from_day_month + interval->time / 1'000'000
6192 : * = (secs_from_day_month * 1'000'000 + interval->time) / 1'000'000
6193 : */
6194 :
6195 : /*
6196 : * Try the computation inside int64; if it overflows, do it in
6197 : * numeric (slower). This overflow happens around 10^9 days, so
6198 : * not common in practice.
6199 : */
6200 132 : if (!pg_mul_s64_overflow(secs_from_day_month, 1000000, &val) &&
6201 126 : !pg_add_s64_overflow(val, interval->time, &val))
6202 126 : result = int64_div_fast_to_numeric(val, 6);
6203 : else
6204 : result =
6205 6 : numeric_add_opt_error(int64_div_fast_to_numeric(interval->time, 6),
6206 : int64_to_numeric(secs_from_day_month),
6207 : NULL);
6208 :
6209 132 : PG_RETURN_NUMERIC(result);
6210 : }
6211 : else
6212 : {
6213 : float8 result;
6214 :
6215 60 : result = interval->time / 1000000.0;
6216 60 : result += ((double) DAYS_PER_YEAR * SECS_PER_DAY) * (interval->month / MONTHS_PER_YEAR);
6217 60 : result += ((double) DAYS_PER_MONTH * SECS_PER_DAY) * (interval->month % MONTHS_PER_YEAR);
6218 60 : result += ((double) SECS_PER_DAY) * interval->day;
6219 :
6220 60 : PG_RETURN_FLOAT8(result);
6221 : }
6222 : }
6223 : else
6224 : {
6225 6 : ereport(ERROR,
6226 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
6227 : errmsg("unit \"%s\" not recognized for type %s",
6228 : lowunits, format_type_be(INTERVALOID))));
6229 : intresult = 0;
6230 : }
6231 :
6232 1428 : if (retnumeric)
6233 1368 : PG_RETURN_NUMERIC(int64_to_numeric(intresult));
6234 : else
6235 60 : PG_RETURN_FLOAT8(intresult);
6236 : }
6237 :
6238 : Datum
6239 288 : interval_part(PG_FUNCTION_ARGS)
6240 : {
6241 288 : return interval_part_common(fcinfo, false);
6242 : }
6243 :
6244 : Datum
6245 2088 : extract_interval(PG_FUNCTION_ARGS)
6246 : {
6247 2088 : return interval_part_common(fcinfo, true);
6248 : }
6249 :
6250 :
6251 : /* timestamp_zone()
6252 : * Encode timestamp type with specified time zone.
6253 : * This function is just timestamp2timestamptz() except instead of
6254 : * shifting to the global timezone, we shift to the specified timezone.
6255 : * This is different from the other AT TIME ZONE cases because instead
6256 : * of shifting _to_ a new time zone, it sets the time to _be_ the
6257 : * specified timezone.
6258 : */
6259 : Datum
6260 168 : timestamp_zone(PG_FUNCTION_ARGS)
6261 : {
6262 168 : text *zone = PG_GETARG_TEXT_PP(0);
6263 168 : Timestamp timestamp = PG_GETARG_TIMESTAMP(1);
6264 : TimestampTz result;
6265 : int tz;
6266 : char tzname[TZ_STRLEN_MAX + 1];
6267 : int type,
6268 : val;
6269 : pg_tz *tzp;
6270 : struct pg_tm tm;
6271 : fsec_t fsec;
6272 :
6273 168 : if (TIMESTAMP_NOT_FINITE(timestamp))
6274 0 : PG_RETURN_TIMESTAMPTZ(timestamp);
6275 :
6276 : /*
6277 : * Look up the requested timezone.
6278 : */
6279 168 : text_to_cstring_buffer(zone, tzname, sizeof(tzname));
6280 :
6281 168 : type = DecodeTimezoneName(tzname, &val, &tzp);
6282 :
6283 168 : if (type == TZNAME_FIXED_OFFSET)
6284 : {
6285 : /* fixed-offset abbreviation */
6286 0 : tz = val;
6287 0 : result = dt2local(timestamp, tz);
6288 : }
6289 168 : else if (type == TZNAME_DYNTZ)
6290 : {
6291 : /* dynamic-offset abbreviation, resolve using specified time */
6292 84 : if (timestamp2tm(timestamp, NULL, &tm, &fsec, NULL, tzp) != 0)
6293 0 : ereport(ERROR,
6294 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
6295 : errmsg("timestamp out of range")));
6296 84 : tz = -DetermineTimeZoneAbbrevOffset(&tm, tzname, tzp);
6297 84 : result = dt2local(timestamp, tz);
6298 : }
6299 : else
6300 : {
6301 : /* full zone name, rotate to that zone */
6302 84 : if (timestamp2tm(timestamp, NULL, &tm, &fsec, NULL, tzp) != 0)
6303 0 : ereport(ERROR,
6304 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
6305 : errmsg("timestamp out of range")));
6306 84 : tz = DetermineTimeZoneOffset(&tm, tzp);
6307 84 : if (tm2timestamp(&tm, fsec, &tz, &result) != 0)
6308 0 : ereport(ERROR,
6309 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
6310 : errmsg("timestamp out of range")));
6311 : }
6312 :
6313 168 : if (!IS_VALID_TIMESTAMP(result))
6314 0 : ereport(ERROR,
6315 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
6316 : errmsg("timestamp out of range")));
6317 :
6318 168 : PG_RETURN_TIMESTAMPTZ(result);
6319 : }
6320 :
6321 : /* timestamp_izone()
6322 : * Encode timestamp type with specified time interval as time zone.
6323 : */
6324 : Datum
6325 12 : timestamp_izone(PG_FUNCTION_ARGS)
6326 : {
6327 12 : Interval *zone = PG_GETARG_INTERVAL_P(0);
6328 12 : Timestamp timestamp = PG_GETARG_TIMESTAMP(1);
6329 : TimestampTz result;
6330 : int tz;
6331 :
6332 12 : if (TIMESTAMP_NOT_FINITE(timestamp))
6333 0 : PG_RETURN_TIMESTAMPTZ(timestamp);
6334 :
6335 12 : if (INTERVAL_NOT_FINITE(zone))
6336 12 : ereport(ERROR,
6337 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
6338 : errmsg("interval time zone \"%s\" must be finite",
6339 : DatumGetCString(DirectFunctionCall1(interval_out,
6340 : PointerGetDatum(zone))))));
6341 :
6342 0 : if (zone->month != 0 || zone->day != 0)
6343 0 : ereport(ERROR,
6344 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
6345 : errmsg("interval time zone \"%s\" must not include months or days",
6346 : DatumGetCString(DirectFunctionCall1(interval_out,
6347 : PointerGetDatum(zone))))));
6348 :
6349 0 : tz = zone->time / USECS_PER_SEC;
6350 :
6351 0 : result = dt2local(timestamp, tz);
6352 :
6353 0 : if (!IS_VALID_TIMESTAMP(result))
6354 0 : ereport(ERROR,
6355 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
6356 : errmsg("timestamp out of range")));
6357 :
6358 0 : PG_RETURN_TIMESTAMPTZ(result);
6359 : } /* timestamp_izone() */
6360 :
6361 : /* TimestampTimestampTzRequiresRewrite()
6362 : *
6363 : * Returns false if the TimeZone GUC setting causes timestamp_timestamptz and
6364 : * timestamptz_timestamp to be no-ops, where the return value has the same
6365 : * bits as the argument. Since project convention is to assume a GUC changes
6366 : * no more often than STABLE functions change, the answer is valid that long.
6367 : */
6368 : bool
6369 18 : TimestampTimestampTzRequiresRewrite(void)
6370 : {
6371 : long offset;
6372 :
6373 18 : if (pg_get_timezone_offset(session_timezone, &offset) && offset == 0)
6374 12 : return false;
6375 6 : return true;
6376 : }
6377 :
6378 : /* timestamp_timestamptz()
6379 : * Convert local timestamp to timestamp at GMT
6380 : */
6381 : Datum
6382 222 : timestamp_timestamptz(PG_FUNCTION_ARGS)
6383 : {
6384 222 : Timestamp timestamp = PG_GETARG_TIMESTAMP(0);
6385 :
6386 222 : PG_RETURN_TIMESTAMPTZ(timestamp2timestamptz(timestamp));
6387 : }
6388 :
6389 : /*
6390 : * Convert timestamp to timestamp with time zone.
6391 : *
6392 : * On successful conversion, *overflow is set to zero if it's not NULL.
6393 : *
6394 : * If the timestamp is finite but out of the valid range for timestamptz, then:
6395 : * if overflow is NULL, we throw an out-of-range error.
6396 : * if overflow is not NULL, we store +1 or -1 there to indicate the sign
6397 : * of the overflow, and return the appropriate timestamptz infinity.
6398 : */
6399 : TimestampTz
6400 16140 : timestamp2timestamptz_opt_overflow(Timestamp timestamp, int *overflow)
6401 : {
6402 : TimestampTz result;
6403 : struct pg_tm tt,
6404 16140 : *tm = &tt;
6405 : fsec_t fsec;
6406 : int tz;
6407 :
6408 16140 : if (overflow)
6409 15906 : *overflow = 0;
6410 :
6411 16140 : if (TIMESTAMP_NOT_FINITE(timestamp))
6412 0 : return timestamp;
6413 :
6414 : /* We don't expect this to fail, but check it pro forma */
6415 16140 : if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL, NULL) == 0)
6416 : {
6417 16140 : tz = DetermineTimeZoneOffset(tm, session_timezone);
6418 :
6419 16140 : result = dt2local(timestamp, -tz);
6420 :
6421 16140 : if (IS_VALID_TIMESTAMP(result))
6422 : {
6423 16128 : return result;
6424 : }
6425 12 : else if (overflow)
6426 : {
6427 12 : if (result < MIN_TIMESTAMP)
6428 : {
6429 12 : *overflow = -1;
6430 12 : TIMESTAMP_NOBEGIN(result);
6431 : }
6432 : else
6433 : {
6434 0 : *overflow = 1;
6435 0 : TIMESTAMP_NOEND(result);
6436 : }
6437 12 : return result;
6438 : }
6439 : }
6440 :
6441 0 : ereport(ERROR,
6442 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
6443 : errmsg("timestamp out of range")));
6444 :
6445 : return 0;
6446 : }
6447 :
6448 : /*
6449 : * Promote timestamp to timestamptz, throwing error for overflow.
6450 : */
6451 : static TimestampTz
6452 234 : timestamp2timestamptz(Timestamp timestamp)
6453 : {
6454 234 : return timestamp2timestamptz_opt_overflow(timestamp, NULL);
6455 : }
6456 :
6457 : /* timestamptz_timestamp()
6458 : * Convert timestamp at GMT to local timestamp
6459 : */
6460 : Datum
6461 62104 : timestamptz_timestamp(PG_FUNCTION_ARGS)
6462 : {
6463 62104 : TimestampTz timestamp = PG_GETARG_TIMESTAMPTZ(0);
6464 :
6465 62104 : PG_RETURN_TIMESTAMP(timestamptz2timestamp(timestamp));
6466 : }
6467 :
6468 : static Timestamp
6469 62170 : timestamptz2timestamp(TimestampTz timestamp)
6470 : {
6471 : Timestamp result;
6472 : struct pg_tm tt,
6473 62170 : *tm = &tt;
6474 : fsec_t fsec;
6475 : int tz;
6476 :
6477 62170 : if (TIMESTAMP_NOT_FINITE(timestamp))
6478 0 : result = timestamp;
6479 : else
6480 : {
6481 62170 : if (timestamp2tm(timestamp, &tz, tm, &fsec, NULL, NULL) != 0)
6482 0 : ereport(ERROR,
6483 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
6484 : errmsg("timestamp out of range")));
6485 62170 : if (tm2timestamp(tm, fsec, NULL, &result) != 0)
6486 0 : ereport(ERROR,
6487 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
6488 : errmsg("timestamp out of range")));
6489 : }
6490 62170 : return result;
6491 : }
6492 :
6493 : /* timestamptz_zone()
6494 : * Evaluate timestamp with time zone type at the specified time zone.
6495 : * Returns a timestamp without time zone.
6496 : */
6497 : Datum
6498 228 : timestamptz_zone(PG_FUNCTION_ARGS)
6499 : {
6500 228 : text *zone = PG_GETARG_TEXT_PP(0);
6501 228 : TimestampTz timestamp = PG_GETARG_TIMESTAMPTZ(1);
6502 : Timestamp result;
6503 : int tz;
6504 : char tzname[TZ_STRLEN_MAX + 1];
6505 : int type,
6506 : val;
6507 : pg_tz *tzp;
6508 :
6509 228 : if (TIMESTAMP_NOT_FINITE(timestamp))
6510 24 : PG_RETURN_TIMESTAMP(timestamp);
6511 :
6512 : /*
6513 : * Look up the requested timezone.
6514 : */
6515 204 : text_to_cstring_buffer(zone, tzname, sizeof(tzname));
6516 :
6517 204 : type = DecodeTimezoneName(tzname, &val, &tzp);
6518 :
6519 198 : if (type == TZNAME_FIXED_OFFSET)
6520 : {
6521 : /* fixed-offset abbreviation */
6522 42 : tz = -val;
6523 42 : result = dt2local(timestamp, tz);
6524 : }
6525 156 : else if (type == TZNAME_DYNTZ)
6526 : {
6527 : /* dynamic-offset abbreviation, resolve using specified time */
6528 : int isdst;
6529 :
6530 72 : tz = DetermineTimeZoneAbbrevOffsetTS(timestamp, tzname, tzp, &isdst);
6531 72 : result = dt2local(timestamp, tz);
6532 : }
6533 : else
6534 : {
6535 : /* full zone name, rotate from that zone */
6536 : struct pg_tm tm;
6537 : fsec_t fsec;
6538 :
6539 84 : if (timestamp2tm(timestamp, &tz, &tm, &fsec, NULL, tzp) != 0)
6540 0 : ereport(ERROR,
6541 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
6542 : errmsg("timestamp out of range")));
6543 84 : if (tm2timestamp(&tm, fsec, NULL, &result) != 0)
6544 0 : ereport(ERROR,
6545 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
6546 : errmsg("timestamp out of range")));
6547 : }
6548 :
6549 198 : if (!IS_VALID_TIMESTAMP(result))
6550 0 : ereport(ERROR,
6551 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
6552 : errmsg("timestamp out of range")));
6553 :
6554 198 : PG_RETURN_TIMESTAMP(result);
6555 : }
6556 :
6557 : /* timestamptz_izone()
6558 : * Encode timestamp with time zone type with specified time interval as time zone.
6559 : * Returns a timestamp without time zone.
6560 : */
6561 : Datum
6562 12 : timestamptz_izone(PG_FUNCTION_ARGS)
6563 : {
6564 12 : Interval *zone = PG_GETARG_INTERVAL_P(0);
6565 12 : TimestampTz timestamp = PG_GETARG_TIMESTAMPTZ(1);
6566 : Timestamp result;
6567 : int tz;
6568 :
6569 12 : if (TIMESTAMP_NOT_FINITE(timestamp))
6570 0 : PG_RETURN_TIMESTAMP(timestamp);
6571 :
6572 12 : if (INTERVAL_NOT_FINITE(zone))
6573 12 : ereport(ERROR,
6574 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
6575 : errmsg("interval time zone \"%s\" must be finite",
6576 : DatumGetCString(DirectFunctionCall1(interval_out,
6577 : PointerGetDatum(zone))))));
6578 :
6579 0 : if (zone->month != 0 || zone->day != 0)
6580 0 : ereport(ERROR,
6581 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
6582 : errmsg("interval time zone \"%s\" must not include months or days",
6583 : DatumGetCString(DirectFunctionCall1(interval_out,
6584 : PointerGetDatum(zone))))));
6585 :
6586 0 : tz = -(zone->time / USECS_PER_SEC);
6587 :
6588 0 : result = dt2local(timestamp, tz);
6589 :
6590 0 : if (!IS_VALID_TIMESTAMP(result))
6591 0 : ereport(ERROR,
6592 : (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE),
6593 : errmsg("timestamp out of range")));
6594 :
6595 0 : PG_RETURN_TIMESTAMP(result);
6596 : }
6597 :
6598 : /* generate_series_timestamp()
6599 : * Generate the set of timestamps from start to finish by step
6600 : */
6601 : Datum
6602 684 : generate_series_timestamp(PG_FUNCTION_ARGS)
6603 : {
6604 : FuncCallContext *funcctx;
6605 : generate_series_timestamp_fctx *fctx;
6606 : Timestamp result;
6607 :
6608 : /* stuff done only on the first call of the function */
6609 684 : if (SRF_IS_FIRSTCALL())
6610 : {
6611 42 : Timestamp start = PG_GETARG_TIMESTAMP(0);
6612 42 : Timestamp finish = PG_GETARG_TIMESTAMP(1);
6613 42 : Interval *step = PG_GETARG_INTERVAL_P(2);
6614 : MemoryContext oldcontext;
6615 :
6616 : /* create a function context for cross-call persistence */
6617 42 : funcctx = SRF_FIRSTCALL_INIT();
6618 :
6619 : /*
6620 : * switch to memory context appropriate for multiple function calls
6621 : */
6622 42 : oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx);
6623 :
6624 : /* allocate memory for user context */
6625 : fctx = (generate_series_timestamp_fctx *)
6626 42 : palloc(sizeof(generate_series_timestamp_fctx));
6627 :
6628 : /*
6629 : * Use fctx to keep state from call to call. Seed current with the
6630 : * original start value
6631 : */
6632 42 : fctx->current = start;
6633 42 : fctx->finish = finish;
6634 42 : fctx->step = *step;
6635 :
6636 : /* Determine sign of the interval */
6637 42 : fctx->step_sign = interval_sign(&fctx->step);
6638 :
6639 42 : if (fctx->step_sign == 0)
6640 6 : ereport(ERROR,
6641 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
6642 : errmsg("step size cannot equal zero")));
6643 :
6644 36 : if (INTERVAL_NOT_FINITE((&fctx->step)))
6645 12 : ereport(ERROR,
6646 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
6647 : errmsg("step size cannot be infinite")));
6648 :
6649 24 : funcctx->user_fctx = fctx;
6650 24 : MemoryContextSwitchTo(oldcontext);
6651 : }
6652 :
6653 : /* stuff done on every call of the function */
6654 666 : funcctx = SRF_PERCALL_SETUP();
6655 :
6656 : /*
6657 : * get the saved state and use current as the result for this iteration
6658 : */
6659 666 : fctx = funcctx->user_fctx;
6660 666 : result = fctx->current;
6661 :
6662 1332 : if (fctx->step_sign > 0 ?
6663 666 : timestamp_cmp_internal(result, fctx->finish) <= 0 :
6664 0 : timestamp_cmp_internal(result, fctx->finish) >= 0)
6665 : {
6666 : /* increment current in preparation for next iteration */
6667 648 : fctx->current = DatumGetTimestamp(DirectFunctionCall2(timestamp_pl_interval,
6668 : TimestampGetDatum(fctx->current),
6669 : PointerGetDatum(&fctx->step)));
6670 :
6671 : /* do when there is more left to send */
6672 648 : SRF_RETURN_NEXT(funcctx, TimestampGetDatum(result));
6673 : }
6674 : else
6675 : {
6676 : /* do when there is no more left */
6677 18 : SRF_RETURN_DONE(funcctx);
6678 : }
6679 : }
6680 :
6681 : /* generate_series_timestamptz()
6682 : * Generate the set of timestamps from start to finish by step,
6683 : * doing arithmetic in the specified or session timezone.
6684 : */
6685 : static Datum
6686 62682 : generate_series_timestamptz_internal(FunctionCallInfo fcinfo)
6687 : {
6688 : FuncCallContext *funcctx;
6689 : generate_series_timestamptz_fctx *fctx;
6690 : TimestampTz result;
6691 :
6692 : /* stuff done only on the first call of the function */
6693 62682 : if (SRF_IS_FIRSTCALL())
6694 : {
6695 92 : TimestampTz start = PG_GETARG_TIMESTAMPTZ(0);
6696 92 : TimestampTz finish = PG_GETARG_TIMESTAMPTZ(1);
6697 92 : Interval *step = PG_GETARG_INTERVAL_P(2);
6698 92 : text *zone = (PG_NARGS() == 4) ? PG_GETARG_TEXT_PP(3) : NULL;
6699 : MemoryContext oldcontext;
6700 :
6701 : /* create a function context for cross-call persistence */
6702 92 : funcctx = SRF_FIRSTCALL_INIT();
6703 :
6704 : /*
6705 : * switch to memory context appropriate for multiple function calls
6706 : */
6707 92 : oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx);
6708 :
6709 : /* allocate memory for user context */
6710 : fctx = (generate_series_timestamptz_fctx *)
6711 92 : palloc(sizeof(generate_series_timestamptz_fctx));
6712 :
6713 : /*
6714 : * Use fctx to keep state from call to call. Seed current with the
6715 : * original start value
6716 : */
6717 92 : fctx->current = start;
6718 92 : fctx->finish = finish;
6719 92 : fctx->step = *step;
6720 92 : fctx->attimezone = zone ? lookup_timezone(zone) : session_timezone;
6721 :
6722 : /* Determine sign of the interval */
6723 92 : fctx->step_sign = interval_sign(&fctx->step);
6724 :
6725 92 : if (fctx->step_sign == 0)
6726 12 : ereport(ERROR,
6727 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
6728 : errmsg("step size cannot equal zero")));
6729 :
6730 80 : if (INTERVAL_NOT_FINITE((&fctx->step)))
6731 12 : ereport(ERROR,
6732 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
6733 : errmsg("step size cannot be infinite")));
6734 :
6735 68 : funcctx->user_fctx = fctx;
6736 68 : MemoryContextSwitchTo(oldcontext);
6737 : }
6738 :
6739 : /* stuff done on every call of the function */
6740 62658 : funcctx = SRF_PERCALL_SETUP();
6741 :
6742 : /*
6743 : * get the saved state and use current as the result for this iteration
6744 : */
6745 62658 : fctx = funcctx->user_fctx;
6746 62658 : result = fctx->current;
6747 :
6748 125316 : if (fctx->step_sign > 0 ?
6749 62388 : timestamp_cmp_internal(result, fctx->finish) <= 0 :
6750 270 : timestamp_cmp_internal(result, fctx->finish) >= 0)
6751 : {
6752 : /* increment current in preparation for next iteration */
6753 62596 : fctx->current = timestamptz_pl_interval_internal(fctx->current,
6754 : &fctx->step,
6755 : fctx->attimezone);
6756 :
6757 : /* do when there is more left to send */
6758 62596 : SRF_RETURN_NEXT(funcctx, TimestampTzGetDatum(result));
6759 : }
6760 : else
6761 : {
6762 : /* do when there is no more left */
6763 62 : SRF_RETURN_DONE(funcctx);
6764 : }
6765 : }
6766 :
6767 : Datum
6768 62412 : generate_series_timestamptz(PG_FUNCTION_ARGS)
6769 : {
6770 62412 : return generate_series_timestamptz_internal(fcinfo);
6771 : }
6772 :
6773 : Datum
6774 270 : generate_series_timestamptz_at_zone(PG_FUNCTION_ARGS)
6775 : {
6776 270 : return generate_series_timestamptz_internal(fcinfo);
6777 : }
6778 :
6779 : /*
6780 : * Planner support function for generate_series(timestamp, timestamp, interval)
6781 : */
6782 : Datum
6783 396 : generate_series_timestamp_support(PG_FUNCTION_ARGS)
6784 : {
6785 396 : Node *rawreq = (Node *) PG_GETARG_POINTER(0);
6786 396 : Node *ret = NULL;
6787 :
6788 396 : if (IsA(rawreq, SupportRequestRows))
6789 : {
6790 : /* Try to estimate the number of rows returned */
6791 132 : SupportRequestRows *req = (SupportRequestRows *) rawreq;
6792 :
6793 132 : if (is_funcclause(req->node)) /* be paranoid */
6794 : {
6795 132 : List *args = ((FuncExpr *) req->node)->args;
6796 : Node *arg1,
6797 : *arg2,
6798 : *arg3;
6799 :
6800 : /* We can use estimated argument values here */
6801 132 : arg1 = estimate_expression_value(req->root, linitial(args));
6802 132 : arg2 = estimate_expression_value(req->root, lsecond(args));
6803 132 : arg3 = estimate_expression_value(req->root, lthird(args));
6804 :
6805 : /*
6806 : * If any argument is constant NULL, we can safely assume that
6807 : * zero rows are returned. Otherwise, if they're all non-NULL
6808 : * constants, we can calculate the number of rows that will be
6809 : * returned.
6810 : */
6811 132 : if ((IsA(arg1, Const) && ((Const *) arg1)->constisnull) ||
6812 132 : (IsA(arg2, Const) && ((Const *) arg2)->constisnull) ||
6813 132 : (IsA(arg3, Const) && ((Const *) arg3)->constisnull))
6814 : {
6815 0 : req->rows = 0;
6816 0 : ret = (Node *) req;
6817 : }
6818 132 : else if (IsA(arg1, Const) && IsA(arg2, Const) && IsA(arg3, Const))
6819 : {
6820 : Timestamp start,
6821 : finish;
6822 : Interval *step;
6823 : Datum diff;
6824 : double dstep;
6825 : int64 dummy;
6826 :
6827 130 : start = DatumGetTimestamp(((Const *) arg1)->constvalue);
6828 130 : finish = DatumGetTimestamp(((Const *) arg2)->constvalue);
6829 130 : step = DatumGetIntervalP(((Const *) arg3)->constvalue);
6830 :
6831 : /*
6832 : * Perform some prechecks which could cause timestamp_mi to
6833 : * raise an ERROR. It's much better to just return some
6834 : * default estimate than error out in a support function.
6835 : */
6836 130 : if (!TIMESTAMP_NOT_FINITE(start) && !TIMESTAMP_NOT_FINITE(finish) &&
6837 112 : !pg_sub_s64_overflow(finish, start, &dummy))
6838 : {
6839 112 : diff = DirectFunctionCall2(timestamp_mi,
6840 : TimestampGetDatum(finish),
6841 : TimestampGetDatum(start));
6842 :
6843 : #define INTERVAL_TO_MICROSECONDS(i) ((((double) (i)->month * DAYS_PER_MONTH + (i)->day)) * USECS_PER_DAY + (i)->time)
6844 :
6845 112 : dstep = INTERVAL_TO_MICROSECONDS(step);
6846 :
6847 : /* This equation works for either sign of step */
6848 112 : if (dstep != 0.0)
6849 : {
6850 94 : Interval *idiff = DatumGetIntervalP(diff);
6851 94 : double ddiff = INTERVAL_TO_MICROSECONDS(idiff);
6852 :
6853 94 : req->rows = floor(ddiff / dstep + 1.0);
6854 94 : ret = (Node *) req;
6855 : }
6856 : #undef INTERVAL_TO_MICROSECONDS
6857 : }
6858 : }
6859 : }
6860 : }
6861 :
6862 396 : PG_RETURN_POINTER(ret);
6863 : }
6864 :
6865 :
6866 : /* timestamp_at_local()
6867 : * timestamptz_at_local()
6868 : *
6869 : * The regression tests do not like two functions with the same proargs and
6870 : * prosrc but different proname, but the grammar for AT LOCAL needs an
6871 : * overloaded name to handle both types of timestamp, so we make simple
6872 : * wrappers for it.
6873 : */
6874 : Datum
6875 24 : timestamp_at_local(PG_FUNCTION_ARGS)
6876 : {
6877 24 : return timestamp_timestamptz(fcinfo);
6878 : }
6879 :
6880 : Datum
6881 24 : timestamptz_at_local(PG_FUNCTION_ARGS)
6882 : {
6883 24 : return timestamptz_timestamp(fcinfo);
6884 : }
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