Line data Source code
1 : /*-------------------------------------------------------------------------
2 : *
3 : * heapfuncs.c
4 : * Functions to investigate heap pages
5 : *
6 : * We check the input to these functions for corrupt pointers etc. that
7 : * might cause crashes, but at the same time we try to print out as much
8 : * information as possible, even if it's nonsense. That's because if a
9 : * page is corrupt, we don't know why and how exactly it is corrupt, so we
10 : * let the user judge it.
11 : *
12 : * These functions are restricted to superusers for the fear of introducing
13 : * security holes if the input checking isn't as water-tight as it should be.
14 : * You'd need to be superuser to obtain a raw page image anyway, so
15 : * there's hardly any use case for using these without superuser-rights
16 : * anyway.
17 : *
18 : * Copyright (c) 2007-2026, PostgreSQL Global Development Group
19 : *
20 : * IDENTIFICATION
21 : * contrib/pageinspect/heapfuncs.c
22 : *
23 : *-------------------------------------------------------------------------
24 : */
25 :
26 : #include "postgres.h"
27 :
28 : #include "access/htup_details.h"
29 : #include "access/relation.h"
30 : #include "catalog/pg_am_d.h"
31 : #include "catalog/pg_type.h"
32 : #include "funcapi.h"
33 : #include "mb/pg_wchar.h"
34 : #include "miscadmin.h"
35 : #include "pageinspect.h"
36 : #include "port/pg_bitutils.h"
37 : #include "utils/array.h"
38 : #include "utils/builtins.h"
39 : #include "utils/rel.h"
40 :
41 : /*
42 : * It's not supported to create tuples with oids anymore, but when pg_upgrade
43 : * was used to upgrade from an older version, tuples might still have an
44 : * oid. Seems worthwhile to display that.
45 : */
46 : static inline Oid
47 0 : HeapTupleHeaderGetOidOld(const HeapTupleHeaderData *tup)
48 : {
49 0 : if (tup->t_infomask & HEAP_HASOID_OLD)
50 0 : return *((const Oid *) ((const char *) (tup) + (tup)->t_hoff - sizeof(Oid)));
51 : else
52 0 : return InvalidOid;
53 : }
54 :
55 :
56 : /*
57 : * bits_to_text
58 : *
59 : * Converts a uint8-array of 'len' bits to a human-readable
60 : * c-string representation.
61 : */
62 : static char *
63 4 : bits_to_text(uint8 *bits, int len)
64 : {
65 : int i;
66 : char *str;
67 :
68 4 : str = palloc(len + 1);
69 :
70 36 : for (i = 0; i < len; i++)
71 32 : str[i] = (bits[(i / 8)] & (1 << (i % 8))) ? '1' : '0';
72 :
73 4 : str[i] = '\0';
74 :
75 4 : return str;
76 : }
77 :
78 :
79 : /*
80 : * text_to_bits
81 : *
82 : * Converts a c-string representation of bits into a uint8-array. This is
83 : * the reverse operation of previous routine.
84 : */
85 : static uint8 *
86 2 : text_to_bits(char *str, int len)
87 : {
88 : uint8 *bits;
89 2 : int off = 0;
90 2 : char byte = 0;
91 :
92 2 : bits = palloc(len + 1);
93 :
94 18 : while (off < len)
95 : {
96 16 : if (off % 8 == 0)
97 2 : byte = 0;
98 :
99 16 : if ((str[off] == '0') || (str[off] == '1'))
100 16 : byte = byte | ((str[off] - '0') << off % 8);
101 : else
102 0 : ereport(ERROR,
103 : (errcode(ERRCODE_DATA_CORRUPTED),
104 : errmsg("invalid character \"%.*s\" in t_bits string",
105 : pg_mblen_cstr(str + off), str + off)));
106 :
107 16 : if (off % 8 == 7)
108 2 : bits[off / 8] = byte;
109 :
110 16 : off++;
111 : }
112 :
113 2 : return bits;
114 : }
115 :
116 : /*
117 : * heap_page_items
118 : *
119 : * Allows inspection of line pointers and tuple headers of a heap page.
120 : */
121 9 : PG_FUNCTION_INFO_V1(heap_page_items);
122 :
123 : typedef struct heap_page_items_state
124 : {
125 : TupleDesc tupd;
126 : Page page;
127 : uint16 offset;
128 : } heap_page_items_state;
129 :
130 : Datum
131 63 : heap_page_items(PG_FUNCTION_ARGS)
132 : {
133 63 : bytea *raw_page = PG_GETARG_BYTEA_P(0);
134 63 : heap_page_items_state *inter_call_data = NULL;
135 : FuncCallContext *fctx;
136 :
137 63 : if (!superuser())
138 0 : ereport(ERROR,
139 : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
140 : errmsg("must be superuser to use raw page functions")));
141 :
142 63 : if (SRF_IS_FIRSTCALL())
143 : {
144 : TupleDesc tupdesc;
145 : MemoryContext mctx;
146 :
147 10 : fctx = SRF_FIRSTCALL_INIT();
148 10 : mctx = MemoryContextSwitchTo(fctx->multi_call_memory_ctx);
149 :
150 10 : inter_call_data = palloc_object(heap_page_items_state);
151 :
152 : /* Build a tuple descriptor for our result type */
153 10 : if (get_call_result_type(fcinfo, NULL, &tupdesc) != TYPEFUNC_COMPOSITE)
154 0 : elog(ERROR, "return type must be a row type");
155 :
156 10 : inter_call_data->tupd = tupdesc;
157 :
158 10 : inter_call_data->offset = FirstOffsetNumber;
159 10 : inter_call_data->page = get_page_from_raw(raw_page);
160 :
161 10 : fctx->max_calls = PageGetMaxOffsetNumber(inter_call_data->page);
162 10 : fctx->user_fctx = inter_call_data;
163 :
164 10 : MemoryContextSwitchTo(mctx);
165 : }
166 :
167 63 : fctx = SRF_PERCALL_SETUP();
168 63 : inter_call_data = fctx->user_fctx;
169 :
170 63 : if (fctx->call_cntr < fctx->max_calls)
171 : {
172 53 : Page page = inter_call_data->page;
173 : HeapTuple resultTuple;
174 : Datum result;
175 : ItemId id;
176 : Datum values[14];
177 : bool nulls[14];
178 : uint16 lp_offset;
179 : uint16 lp_flags;
180 : uint16 lp_len;
181 :
182 53 : memset(nulls, 0, sizeof(nulls));
183 :
184 : /* Extract information from the line pointer */
185 :
186 53 : id = PageGetItemId(page, inter_call_data->offset);
187 :
188 53 : lp_offset = ItemIdGetOffset(id);
189 53 : lp_flags = ItemIdGetFlags(id);
190 53 : lp_len = ItemIdGetLength(id);
191 :
192 53 : values[0] = UInt16GetDatum(inter_call_data->offset);
193 53 : values[1] = UInt16GetDatum(lp_offset);
194 53 : values[2] = UInt16GetDatum(lp_flags);
195 53 : values[3] = UInt16GetDatum(lp_len);
196 :
197 : /*
198 : * We do just enough validity checking to make sure we don't reference
199 : * data outside the page passed to us. The page could be corrupt in
200 : * many other ways, but at least we won't crash.
201 : */
202 53 : if (ItemIdHasStorage(id) &&
203 48 : lp_len >= MinHeapTupleSize &&
204 48 : lp_offset == MAXALIGN(lp_offset) &&
205 48 : lp_offset + lp_len <= BLCKSZ)
206 48 : {
207 : HeapTupleHeader tuphdr;
208 :
209 : /* Extract information from the tuple header */
210 48 : tuphdr = (HeapTupleHeader) PageGetItem(page, id);
211 :
212 48 : values[4] = UInt32GetDatum(HeapTupleHeaderGetRawXmin(tuphdr));
213 48 : values[5] = UInt32GetDatum(HeapTupleHeaderGetRawXmax(tuphdr));
214 : /* shared with xvac */
215 48 : values[6] = UInt32GetDatum(HeapTupleHeaderGetRawCommandId(tuphdr));
216 48 : values[7] = PointerGetDatum(&tuphdr->t_ctid);
217 48 : values[8] = UInt32GetDatum(tuphdr->t_infomask2);
218 48 : values[9] = UInt32GetDatum(tuphdr->t_infomask);
219 48 : values[10] = UInt8GetDatum(tuphdr->t_hoff);
220 :
221 : /*
222 : * We already checked that the item is completely within the raw
223 : * page passed to us, with the length given in the line pointer.
224 : * But t_hoff could be out of range, so check it before relying on
225 : * it to fetch additional info.
226 : */
227 48 : if (tuphdr->t_hoff >= SizeofHeapTupleHeader &&
228 48 : tuphdr->t_hoff <= lp_len &&
229 48 : tuphdr->t_hoff == MAXALIGN(tuphdr->t_hoff))
230 48 : {
231 : int tuple_data_len;
232 : bytea *tuple_data_bytea;
233 :
234 : /* Copy null bitmask and OID, if present */
235 48 : if (tuphdr->t_infomask & HEAP_HASNULL)
236 : {
237 : int bitmaplen;
238 :
239 4 : bitmaplen = BITMAPLEN(HeapTupleHeaderGetNatts(tuphdr));
240 : /* better range-check the attribute count, too */
241 4 : if (bitmaplen <= tuphdr->t_hoff - SizeofHeapTupleHeader)
242 4 : values[11] =
243 4 : CStringGetTextDatum(bits_to_text(tuphdr->t_bits,
244 : bitmaplen * BITS_PER_BYTE));
245 : else
246 0 : nulls[11] = true;
247 : }
248 : else
249 44 : nulls[11] = true;
250 :
251 48 : if (tuphdr->t_infomask & HEAP_HASOID_OLD)
252 0 : values[12] = ObjectIdGetDatum(HeapTupleHeaderGetOidOld(tuphdr));
253 : else
254 48 : nulls[12] = true;
255 :
256 : /* Copy raw tuple data into bytea attribute */
257 48 : tuple_data_len = lp_len - tuphdr->t_hoff;
258 48 : tuple_data_bytea = (bytea *) palloc(tuple_data_len + VARHDRSZ);
259 48 : SET_VARSIZE(tuple_data_bytea, tuple_data_len + VARHDRSZ);
260 48 : if (tuple_data_len > 0)
261 48 : memcpy(VARDATA(tuple_data_bytea),
262 48 : (char *) tuphdr + tuphdr->t_hoff,
263 : tuple_data_len);
264 48 : values[13] = PointerGetDatum(tuple_data_bytea);
265 : }
266 : else
267 : {
268 0 : nulls[11] = true;
269 0 : nulls[12] = true;
270 0 : nulls[13] = true;
271 : }
272 : }
273 : else
274 : {
275 : /*
276 : * The line pointer is not used, or it's invalid. Set the rest of
277 : * the fields to NULL
278 : */
279 : int i;
280 :
281 55 : for (i = 4; i <= 13; i++)
282 50 : nulls[i] = true;
283 : }
284 :
285 : /* Build and return the result tuple. */
286 53 : resultTuple = heap_form_tuple(inter_call_data->tupd, values, nulls);
287 53 : result = HeapTupleGetDatum(resultTuple);
288 :
289 53 : inter_call_data->offset++;
290 :
291 53 : SRF_RETURN_NEXT(fctx, result);
292 : }
293 : else
294 10 : SRF_RETURN_DONE(fctx);
295 : }
296 :
297 : /*
298 : * tuple_data_split_internal
299 : *
300 : * Split raw tuple data taken directly from a page into an array of bytea
301 : * elements. This routine does a lookup on NULL values and creates array
302 : * elements accordingly. This is a reimplementation of nocachegetattr()
303 : * in heaptuple.c simplified for educational purposes.
304 : */
305 : static Datum
306 5 : tuple_data_split_internal(Oid relid, char *tupdata,
307 : uint16 tupdata_len, uint16 t_infomask,
308 : uint16 t_infomask2, uint8 *t_bits,
309 : bool do_detoast)
310 : {
311 : ArrayBuildState *raw_attrs;
312 : int nattrs;
313 : int i;
314 5 : int off = 0;
315 : Relation rel;
316 : TupleDesc tupdesc;
317 :
318 : /* Get tuple descriptor from relation OID */
319 5 : rel = relation_open(relid, AccessShareLock);
320 5 : tupdesc = RelationGetDescr(rel);
321 :
322 5 : raw_attrs = initArrayResult(BYTEAOID, CurrentMemoryContext, false);
323 5 : nattrs = tupdesc->natts;
324 :
325 : /*
326 : * Sequences always use heap AM, but they don't show that in the catalogs.
327 : */
328 5 : if (rel->rd_rel->relkind != RELKIND_SEQUENCE &&
329 4 : rel->rd_rel->relam != HEAP_TABLE_AM_OID)
330 0 : ereport(ERROR, (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
331 : errmsg("only heap AM is supported")));
332 :
333 5 : if (nattrs < (t_infomask2 & HEAP_NATTS_MASK))
334 0 : ereport(ERROR,
335 : (errcode(ERRCODE_DATA_CORRUPTED),
336 : errmsg("number of attributes in tuple header is greater than number of attributes in tuple descriptor")));
337 :
338 22 : for (i = 0; i < nattrs; i++)
339 : {
340 : CompactAttribute *attr;
341 : bool is_null;
342 17 : bytea *attr_data = NULL;
343 :
344 17 : attr = TupleDescCompactAttr(tupdesc, i);
345 :
346 : /*
347 : * Tuple header can specify fewer attributes than tuple descriptor as
348 : * ALTER TABLE ADD COLUMN without DEFAULT keyword does not actually
349 : * change tuples in pages, so attributes with numbers greater than
350 : * (t_infomask2 & HEAP_NATTS_MASK) should be treated as NULL.
351 : */
352 17 : if (i >= (t_infomask2 & HEAP_NATTS_MASK))
353 0 : is_null = true;
354 : else
355 17 : is_null = (t_infomask & HEAP_HASNULL) && att_isnull(i, t_bits);
356 :
357 17 : if (!is_null)
358 : {
359 : int len;
360 :
361 10 : if (attr->attlen == -1)
362 : {
363 0 : off = att_pointer_alignby(off, attr->attalignby, -1,
364 : tupdata + off);
365 :
366 : /*
367 : * As VARSIZE_ANY throws an exception if it can't properly
368 : * detect the type of external storage in macros VARTAG_SIZE,
369 : * this check is repeated to have a nicer error handling.
370 : */
371 0 : if (VARATT_IS_EXTERNAL(tupdata + off) &&
372 0 : !VARATT_IS_EXTERNAL_ONDISK(tupdata + off) &&
373 0 : !VARATT_IS_EXTERNAL_INDIRECT(tupdata + off))
374 0 : ereport(ERROR,
375 : (errcode(ERRCODE_DATA_CORRUPTED),
376 : errmsg("first byte of varlena attribute is incorrect for attribute %d", i)));
377 :
378 0 : len = VARSIZE_ANY(tupdata + off);
379 : }
380 : else
381 : {
382 10 : off = att_nominal_alignby(off, attr->attalignby);
383 10 : len = attr->attlen;
384 : }
385 :
386 10 : if (tupdata_len < off + len)
387 0 : ereport(ERROR,
388 : (errcode(ERRCODE_DATA_CORRUPTED),
389 : errmsg("unexpected end of tuple data")));
390 :
391 10 : if (attr->attlen == -1 && do_detoast)
392 0 : attr_data = pg_detoast_datum_copy((varlena *) (tupdata + off));
393 : else
394 : {
395 10 : attr_data = (bytea *) palloc(len + VARHDRSZ);
396 10 : SET_VARSIZE(attr_data, len + VARHDRSZ);
397 10 : memcpy(VARDATA(attr_data), tupdata + off, len);
398 : }
399 :
400 10 : off = att_addlength_pointer(off, attr->attlen,
401 : tupdata + off);
402 : }
403 :
404 17 : raw_attrs = accumArrayResult(raw_attrs, PointerGetDatum(attr_data),
405 : is_null, BYTEAOID, CurrentMemoryContext);
406 17 : if (attr_data)
407 10 : pfree(attr_data);
408 : }
409 :
410 5 : if (tupdata_len != off)
411 0 : ereport(ERROR,
412 : (errcode(ERRCODE_DATA_CORRUPTED),
413 : errmsg("end of tuple reached without looking at all its data")));
414 :
415 5 : relation_close(rel, AccessShareLock);
416 :
417 5 : return makeArrayResult(raw_attrs, CurrentMemoryContext);
418 : }
419 :
420 : /*
421 : * tuple_data_split
422 : *
423 : * Split raw tuple data taken directly from page into distinct elements
424 : * taking into account null values.
425 : */
426 15 : PG_FUNCTION_INFO_V1(tuple_data_split);
427 :
428 : Datum
429 5 : tuple_data_split(PG_FUNCTION_ARGS)
430 : {
431 : Oid relid;
432 : bytea *raw_data;
433 : uint16 t_infomask;
434 : uint16 t_infomask2;
435 : char *t_bits_str;
436 5 : bool do_detoast = false;
437 5 : uint8 *t_bits = NULL;
438 : Datum res;
439 :
440 5 : relid = PG_GETARG_OID(0);
441 5 : raw_data = PG_ARGISNULL(1) ? NULL : PG_GETARG_BYTEA_P(1);
442 5 : t_infomask = PG_GETARG_INT16(2);
443 5 : t_infomask2 = PG_GETARG_INT16(3);
444 5 : t_bits_str = PG_ARGISNULL(4) ? NULL :
445 2 : text_to_cstring(PG_GETARG_TEXT_PP(4));
446 :
447 5 : if (PG_NARGS() >= 6)
448 0 : do_detoast = PG_GETARG_BOOL(5);
449 :
450 5 : if (!superuser())
451 0 : ereport(ERROR,
452 : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
453 : errmsg("must be superuser to use raw page functions")));
454 :
455 5 : if (!raw_data)
456 0 : PG_RETURN_NULL();
457 :
458 : /*
459 : * Convert t_bits string back to the uint8 array as represented in the
460 : * tuple header.
461 : */
462 5 : if (t_infomask & HEAP_HASNULL)
463 : {
464 : size_t bits_str_len;
465 : size_t bits_len;
466 :
467 2 : bits_len = BITMAPLEN(t_infomask2 & HEAP_NATTS_MASK) * BITS_PER_BYTE;
468 2 : if (!t_bits_str)
469 0 : ereport(ERROR,
470 : (errcode(ERRCODE_DATA_CORRUPTED),
471 : errmsg("t_bits string must not be NULL")));
472 :
473 2 : bits_str_len = strlen(t_bits_str);
474 2 : if (bits_len != bits_str_len)
475 0 : ereport(ERROR,
476 : (errcode(ERRCODE_DATA_CORRUPTED),
477 : errmsg("unexpected length of t_bits string: %zu, expected %zu",
478 : bits_str_len, bits_len)));
479 :
480 : /* do the conversion */
481 2 : t_bits = text_to_bits(t_bits_str, bits_str_len);
482 : }
483 : else
484 : {
485 3 : if (t_bits_str)
486 0 : ereport(ERROR,
487 : (errcode(ERRCODE_DATA_CORRUPTED),
488 : errmsg("t_bits string is expected to be NULL, but instead it is %zu bytes long",
489 : strlen(t_bits_str))));
490 : }
491 :
492 : /* Split tuple data */
493 10 : res = tuple_data_split_internal(relid, (char *) raw_data + VARHDRSZ,
494 5 : VARSIZE(raw_data) - VARHDRSZ,
495 : t_infomask, t_infomask2, t_bits,
496 : do_detoast);
497 :
498 5 : if (t_bits)
499 2 : pfree(t_bits);
500 :
501 5 : PG_RETURN_DATUM(res);
502 : }
503 :
504 : /*
505 : * heap_tuple_infomask_flags
506 : *
507 : * Decode into a human-readable format t_infomask and t_infomask2 associated
508 : * to a tuple. All the flags are described in access/htup_details.h.
509 : */
510 8 : PG_FUNCTION_INFO_V1(heap_tuple_infomask_flags);
511 :
512 : Datum
513 11 : heap_tuple_infomask_flags(PG_FUNCTION_ARGS)
514 : {
515 : #define HEAP_TUPLE_INFOMASK_COLS 2
516 11 : Datum values[HEAP_TUPLE_INFOMASK_COLS] = {0};
517 11 : bool nulls[HEAP_TUPLE_INFOMASK_COLS] = {0};
518 11 : uint16 t_infomask = PG_GETARG_INT16(0);
519 11 : uint16 t_infomask2 = PG_GETARG_INT16(1);
520 11 : int cnt = 0;
521 : ArrayType *a;
522 : int bitcnt;
523 : Datum *flags;
524 : TupleDesc tupdesc;
525 : HeapTuple tuple;
526 :
527 11 : if (!superuser())
528 0 : ereport(ERROR,
529 : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
530 : errmsg("must be superuser to use raw page functions")));
531 :
532 : /* Build a tuple descriptor for our result type */
533 11 : if (get_call_result_type(fcinfo, NULL, &tupdesc) != TYPEFUNC_COMPOSITE)
534 0 : elog(ERROR, "return type must be a row type");
535 :
536 11 : bitcnt = pg_popcount((const char *) &t_infomask, sizeof(uint16)) +
537 11 : pg_popcount((const char *) &t_infomask2, sizeof(uint16));
538 :
539 : /* If no flags, return a set of empty arrays */
540 11 : if (bitcnt <= 0)
541 : {
542 1 : values[0] = PointerGetDatum(construct_empty_array(TEXTOID));
543 1 : values[1] = PointerGetDatum(construct_empty_array(TEXTOID));
544 1 : tuple = heap_form_tuple(tupdesc, values, nulls);
545 1 : PG_RETURN_DATUM(HeapTupleGetDatum(tuple));
546 : }
547 :
548 : /* build set of raw flags */
549 10 : flags = palloc0_array(Datum, bitcnt);
550 :
551 : /* decode t_infomask */
552 10 : if ((t_infomask & HEAP_HASNULL) != 0)
553 3 : flags[cnt++] = CStringGetTextDatum("HEAP_HASNULL");
554 10 : if ((t_infomask & HEAP_HASVARWIDTH) != 0)
555 2 : flags[cnt++] = CStringGetTextDatum("HEAP_HASVARWIDTH");
556 10 : if ((t_infomask & HEAP_HASEXTERNAL) != 0)
557 2 : flags[cnt++] = CStringGetTextDatum("HEAP_HASEXTERNAL");
558 10 : if ((t_infomask & HEAP_HASOID_OLD) != 0)
559 2 : flags[cnt++] = CStringGetTextDatum("HEAP_HASOID_OLD");
560 10 : if ((t_infomask & HEAP_XMAX_KEYSHR_LOCK) != 0)
561 4 : flags[cnt++] = CStringGetTextDatum("HEAP_XMAX_KEYSHR_LOCK");
562 10 : if ((t_infomask & HEAP_COMBOCID) != 0)
563 2 : flags[cnt++] = CStringGetTextDatum("HEAP_COMBOCID");
564 10 : if ((t_infomask & HEAP_XMAX_EXCL_LOCK) != 0)
565 3 : flags[cnt++] = CStringGetTextDatum("HEAP_XMAX_EXCL_LOCK");
566 10 : if ((t_infomask & HEAP_XMAX_LOCK_ONLY) != 0)
567 2 : flags[cnt++] = CStringGetTextDatum("HEAP_XMAX_LOCK_ONLY");
568 10 : if ((t_infomask & HEAP_XMIN_COMMITTED) != 0)
569 4 : flags[cnt++] = CStringGetTextDatum("HEAP_XMIN_COMMITTED");
570 10 : if ((t_infomask & HEAP_XMIN_INVALID) != 0)
571 4 : flags[cnt++] = CStringGetTextDatum("HEAP_XMIN_INVALID");
572 10 : if ((t_infomask & HEAP_XMAX_COMMITTED) != 0)
573 2 : flags[cnt++] = CStringGetTextDatum("HEAP_XMAX_COMMITTED");
574 10 : if ((t_infomask & HEAP_XMAX_INVALID) != 0)
575 5 : flags[cnt++] = CStringGetTextDatum("HEAP_XMAX_INVALID");
576 10 : if ((t_infomask & HEAP_XMAX_IS_MULTI) != 0)
577 2 : flags[cnt++] = CStringGetTextDatum("HEAP_XMAX_IS_MULTI");
578 10 : if ((t_infomask & HEAP_UPDATED) != 0)
579 2 : flags[cnt++] = CStringGetTextDatum("HEAP_UPDATED");
580 10 : if ((t_infomask & HEAP_MOVED_OFF) != 0)
581 4 : flags[cnt++] = CStringGetTextDatum("HEAP_MOVED_OFF");
582 10 : if ((t_infomask & HEAP_MOVED_IN) != 0)
583 4 : flags[cnt++] = CStringGetTextDatum("HEAP_MOVED_IN");
584 :
585 : /* decode t_infomask2 */
586 10 : if ((t_infomask2 & HEAP_KEYS_UPDATED) != 0)
587 2 : flags[cnt++] = CStringGetTextDatum("HEAP_KEYS_UPDATED");
588 10 : if ((t_infomask2 & HEAP_HOT_UPDATED) != 0)
589 2 : flags[cnt++] = CStringGetTextDatum("HEAP_HOT_UPDATED");
590 10 : if ((t_infomask2 & HEAP_ONLY_TUPLE) != 0)
591 2 : flags[cnt++] = CStringGetTextDatum("HEAP_ONLY_TUPLE");
592 :
593 : /* build value */
594 : Assert(cnt <= bitcnt);
595 10 : a = construct_array_builtin(flags, cnt, TEXTOID);
596 10 : values[0] = PointerGetDatum(a);
597 :
598 : /*
599 : * Build set of combined flags. Use the same array as previously, this
600 : * keeps the code simple.
601 : */
602 10 : cnt = 0;
603 92 : MemSet(flags, 0, sizeof(Datum) * bitcnt);
604 :
605 : /* decode combined masks of t_infomask */
606 10 : if ((t_infomask & HEAP_XMAX_SHR_LOCK) == HEAP_XMAX_SHR_LOCK)
607 3 : flags[cnt++] = CStringGetTextDatum("HEAP_XMAX_SHR_LOCK");
608 10 : if ((t_infomask & HEAP_XMIN_FROZEN) == HEAP_XMIN_FROZEN)
609 4 : flags[cnt++] = CStringGetTextDatum("HEAP_XMIN_FROZEN");
610 10 : if ((t_infomask & HEAP_MOVED) == HEAP_MOVED)
611 4 : flags[cnt++] = CStringGetTextDatum("HEAP_MOVED");
612 :
613 : /* Build an empty array if there are no combined flags */
614 10 : if (cnt == 0)
615 3 : a = construct_empty_array(TEXTOID);
616 : else
617 7 : a = construct_array_builtin(flags, cnt, TEXTOID);
618 10 : pfree(flags);
619 10 : values[1] = PointerGetDatum(a);
620 :
621 : /* Returns the record as Datum */
622 10 : tuple = heap_form_tuple(tupdesc, values, nulls);
623 10 : PG_RETURN_DATUM(HeapTupleGetDatum(tuple));
624 : }
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