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1 : /*-------------------------------------------------------------------------
2 : *
3 : * timestamp.h
4 : * Definitions for the SQL "timestamp" and "interval" types.
5 : *
6 : * Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
7 : * Portions Copyright (c) 1994, Regents of the University of California
8 : *
9 : * src/include/utils/timestamp.h
10 : *
11 : *-------------------------------------------------------------------------
12 : */
13 : #ifndef TIMESTAMP_H
14 : #define TIMESTAMP_H
15 :
16 : #include "datatype/timestamp.h"
17 : #include "fmgr.h"
18 : #include "pgtime.h"
19 :
20 :
21 : /*
22 : * Functions for fmgr-callable functions.
23 : *
24 : * For Timestamp, we make use of the same support routines as for int64.
25 : * Therefore Timestamp is pass-by-reference if and only if int64 is!
26 : */
27 : static inline Timestamp
28 981936 : DatumGetTimestamp(Datum X)
29 : {
30 981936 : return (Timestamp) DatumGetInt64(X);
31 : }
32 :
33 : static inline TimestampTz
34 350760 : DatumGetTimestampTz(Datum X)
35 : {
36 350760 : return (TimestampTz) DatumGetInt64(X);
37 : }
38 :
39 : static inline Interval *
40 518818 : DatumGetIntervalP(Datum X)
41 : {
42 518818 : return (Interval *) DatumGetPointer(X);
43 : }
44 :
45 : static inline Datum
46 477146 : TimestampGetDatum(Timestamp X)
47 : {
48 477146 : return Int64GetDatum(X);
49 : }
50 :
51 : static inline Datum
52 484166 : TimestampTzGetDatum(TimestampTz X)
53 : {
54 484166 : return Int64GetDatum(X);
55 : }
56 :
57 : static inline Datum
58 250552 : IntervalPGetDatum(const Interval *X)
59 : {
60 250552 : return PointerGetDatum(X);
61 : }
62 :
63 : #define PG_GETARG_TIMESTAMP(n) DatumGetTimestamp(PG_GETARG_DATUM(n))
64 : #define PG_GETARG_TIMESTAMPTZ(n) DatumGetTimestampTz(PG_GETARG_DATUM(n))
65 : #define PG_GETARG_INTERVAL_P(n) DatumGetIntervalP(PG_GETARG_DATUM(n))
66 :
67 : #define PG_RETURN_TIMESTAMP(x) return TimestampGetDatum(x)
68 : #define PG_RETURN_TIMESTAMPTZ(x) return TimestampTzGetDatum(x)
69 : #define PG_RETURN_INTERVAL_P(x) return IntervalPGetDatum(x)
70 :
71 :
72 : #define TIMESTAMP_MASK(b) (1 << (b))
73 : #define INTERVAL_MASK(b) (1 << (b))
74 :
75 : /* Macros to handle packing and unpacking the typmod field for intervals */
76 : #define INTERVAL_FULL_RANGE (0x7FFF)
77 : #define INTERVAL_RANGE_MASK (0x7FFF)
78 : #define INTERVAL_FULL_PRECISION (0xFFFF)
79 : #define INTERVAL_PRECISION_MASK (0xFFFF)
80 : #define INTERVAL_TYPMOD(p,r) ((((r) & INTERVAL_RANGE_MASK) << 16) | ((p) & INTERVAL_PRECISION_MASK))
81 : #define INTERVAL_PRECISION(t) ((t) & INTERVAL_PRECISION_MASK)
82 : #define INTERVAL_RANGE(t) (((t) >> 16) & INTERVAL_RANGE_MASK)
83 :
84 : /* Macros for doing timestamp arithmetic without assuming timestamp's units */
85 : #define TimestampTzPlusMilliseconds(tz,ms) ((tz) + ((ms) * (int64) 1000))
86 : #define TimestampTzPlusSeconds(tz,s) ((tz) + ((s) * (int64) 1000000))
87 :
88 : /* Helper for simple subtraction between two timestamps */
89 : static inline uint64
90 378 : TimestampDifferenceMicroseconds(TimestampTz start_time,
91 : TimestampTz stop_time)
92 : {
93 378 : if (start_time >= stop_time)
94 0 : return 0;
95 378 : return (uint64) stop_time - start_time;
96 : }
97 :
98 : /* Set at postmaster start */
99 : extern PGDLLIMPORT TimestampTz PgStartTime;
100 :
101 : /* Set at configuration reload */
102 : extern PGDLLIMPORT TimestampTz PgReloadTime;
103 :
104 :
105 : /* Internal routines (not fmgr-callable) */
106 :
107 : extern int32 anytimestamp_typmod_check(bool istz, int32 typmod);
108 :
109 : extern TimestampTz GetCurrentTimestamp(void);
110 : extern TimestampTz GetSQLCurrentTimestamp(int32 typmod);
111 : extern Timestamp GetSQLLocalTimestamp(int32 typmod);
112 : extern void TimestampDifference(TimestampTz start_time, TimestampTz stop_time,
113 : long *secs, int *microsecs);
114 : extern long TimestampDifferenceMilliseconds(TimestampTz start_time,
115 : TimestampTz stop_time);
116 : extern bool TimestampDifferenceExceeds(TimestampTz start_time,
117 : TimestampTz stop_time,
118 : int msec);
119 : extern bool TimestampDifferenceExceedsSeconds(TimestampTz start_time,
120 : TimestampTz stop_time,
121 : int threshold_sec);
122 :
123 : extern TimestampTz time_t_to_timestamptz(pg_time_t tm);
124 : extern pg_time_t timestamptz_to_time_t(TimestampTz t);
125 :
126 : extern const char *timestamptz_to_str(TimestampTz t);
127 :
128 : extern int tm2timestamp(struct pg_tm *tm, fsec_t fsec, int *tzp, Timestamp *result);
129 : extern int timestamp2tm(Timestamp dt, int *tzp, struct pg_tm *tm,
130 : fsec_t *fsec, const char **tzn, pg_tz *attimezone);
131 : extern void dt2time(Timestamp jd, int *hour, int *min, int *sec, fsec_t *fsec);
132 :
133 : extern void interval2itm(Interval span, struct pg_itm *itm);
134 : extern int itm2interval(struct pg_itm *itm, Interval *span);
135 : extern int itmin2interval(struct pg_itm_in *itm_in, Interval *span);
136 :
137 : extern Timestamp SetEpochTimestamp(void);
138 : extern void GetEpochTime(struct pg_tm *tm);
139 :
140 : extern int timestamp_cmp_internal(Timestamp dt1, Timestamp dt2);
141 :
142 : /* timestamp comparison works for timestamptz also */
143 : #define timestamptz_cmp_internal(dt1,dt2) timestamp_cmp_internal(dt1, dt2)
144 :
145 : extern TimestampTz timestamp2timestamptz_opt_overflow(Timestamp timestamp,
146 : int *overflow);
147 : extern int32 timestamp_cmp_timestamptz_internal(Timestamp timestampVal,
148 : TimestampTz dt2);
149 :
150 : extern int isoweek2j(int year, int week);
151 : extern void isoweek2date(int woy, int *year, int *mon, int *mday);
152 : extern void isoweekdate2date(int isoweek, int wday, int *year, int *mon, int *mday);
153 : extern int date2isoweek(int year, int mon, int mday);
154 : extern int date2isoyear(int year, int mon, int mday);
155 : extern int date2isoyearday(int year, int mon, int mday);
156 :
157 : extern bool TimestampTimestampTzRequiresRewrite(void);
158 :
159 : #endif /* TIMESTAMP_H */
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