1 /*-------------------------------------------------------------------------
4 * Definitions for the SQL92 "timestamp" and "interval" types.
6 * Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
7 * Portions Copyright (c) 1994, Regents of the University of California
9 * $PostgreSQL: pgsql/src/include/utils/timestamp.h,v 1.49 2005/07/21 04:48:42 momjian Exp $
11 *-------------------------------------------------------------------------
22 #ifdef HAVE_INT64_TIMESTAMP
23 #include "utils/int8.h"
27 * Timestamp represents absolute time.
28 * Interval represents delta time. Keep track of months (and years), days,
29 * and time separately since the elapsed time spanned is unknown until
30 * instantiated relative to an absolute time.
32 * Note that Postgres uses "time interval" to mean a bounded interval,
33 * consisting of a beginning and ending time, not a time span - thomas 97/03/20
36 #ifdef HAVE_INT64_TIMESTAMP
37 typedef int64 Timestamp;
38 typedef int64 TimestampTz;
41 typedef double Timestamp;
42 typedef double TimestampTz;
47 #ifdef HAVE_INT64_TIMESTAMP
48 int64 time; /* all time units other than days,
51 double time; /* all time units other than days,
54 int32 day; /* days, after time for alignment */
55 int32 month; /* months and years, after time for
60 #define MAX_TIMESTAMP_PRECISION 6
61 #define MAX_INTERVAL_PRECISION 6
63 /* in both timestamp.h and ecpg/dt.h */
64 #define DAYS_PER_YEAR 365.25 /* assumes leap year every four years */
65 #define MONTHS_PER_YEAR 12
66 #define DAYS_PER_MONTH 30 /* assumes exactly 30 days per month */
67 #define HOURS_PER_DAY 24 /* assume no daylight savings time changes */
69 #define SECS_PER_DAY 86400 /* assumes no leap second */
70 #define SECS_PER_HOUR 3600
71 #define SECS_PER_MINUTE 60
73 #ifdef HAVE_INT64_TIMESTAMP
74 #define USECS_PER_DAY INT64CONST(86400000000)
75 #define USECS_PER_HOUR INT64CONST(3600000000)
76 #define USECS_PER_MINUTE INT64CONST(60000000)
77 #define USECS_PER_SEC INT64CONST(1000000)
81 * Macros for fmgr-callable functions.
83 * For Timestamp, we make use of the same support routines as for int64
84 * or float8. Therefore Timestamp is pass-by-reference if and only if
87 #ifdef HAVE_INT64_TIMESTAMP
89 #define DatumGetTimestamp(X) ((Timestamp) DatumGetInt64(X))
90 #define DatumGetTimestampTz(X) ((TimestampTz) DatumGetInt64(X))
91 #define DatumGetIntervalP(X) ((Interval *) DatumGetPointer(X))
93 #define TimestampGetDatum(X) Int64GetDatum(X)
94 #define TimestampTzGetDatum(X) Int64GetDatum(X)
95 #define IntervalPGetDatum(X) PointerGetDatum(X)
97 #define PG_GETARG_TIMESTAMP(n) PG_GETARG_INT64(n)
98 #define PG_GETARG_TIMESTAMPTZ(n) PG_GETARG_INT64(n)
99 #define PG_GETARG_INTERVAL_P(n) DatumGetIntervalP(PG_GETARG_DATUM(n))
101 #define PG_RETURN_TIMESTAMP(x) PG_RETURN_INT64(x)
102 #define PG_RETURN_TIMESTAMPTZ(x) PG_RETURN_INT64(x)
103 #define PG_RETURN_INTERVAL_P(x) return IntervalPGetDatum(x)
105 #define DT_NOBEGIN (-INT64CONST(0x7fffffffffffffff) - 1)
106 #define DT_NOEND (INT64CONST(0x7fffffffffffffff))
110 #define DatumGetTimestamp(X) ((Timestamp) DatumGetFloat8(X))
111 #define DatumGetTimestampTz(X) ((TimestampTz) DatumGetFloat8(X))
112 #define DatumGetIntervalP(X) ((Interval *) DatumGetPointer(X))
114 #define TimestampGetDatum(X) Float8GetDatum(X)
115 #define TimestampTzGetDatum(X) Float8GetDatum(X)
116 #define IntervalPGetDatum(X) PointerGetDatum(X)
118 #define PG_GETARG_TIMESTAMP(n) DatumGetTimestamp(PG_GETARG_DATUM(n))
119 #define PG_GETARG_TIMESTAMPTZ(n) DatumGetTimestampTz(PG_GETARG_DATUM(n))
120 #define PG_GETARG_INTERVAL_P(n) DatumGetIntervalP(PG_GETARG_DATUM(n))
122 #define PG_RETURN_TIMESTAMP(x) return TimestampGetDatum(x)
123 #define PG_RETURN_TIMESTAMPTZ(x) return TimestampTzGetDatum(x)
124 #define PG_RETURN_INTERVAL_P(x) return IntervalPGetDatum(x)
127 #define DT_NOBEGIN (-HUGE_VAL)
128 #define DT_NOEND (HUGE_VAL)
130 #define DT_NOBEGIN (-DBL_MAX)
131 #define DT_NOEND (DBL_MAX)
133 #endif /* HAVE_INT64_TIMESTAMP */
136 #define TIMESTAMP_NOBEGIN(j) do {(j) = DT_NOBEGIN;} while (0)
137 #define TIMESTAMP_IS_NOBEGIN(j) ((j) == DT_NOBEGIN)
139 #define TIMESTAMP_NOEND(j) do {(j) = DT_NOEND;} while (0)
140 #define TIMESTAMP_IS_NOEND(j) ((j) == DT_NOEND)
142 #define TIMESTAMP_NOT_FINITE(j) (TIMESTAMP_IS_NOBEGIN(j) || TIMESTAMP_IS_NOEND(j))
144 #ifdef HAVE_INT64_TIMESTAMP
146 typedef int32 fsec_t;
150 typedef double fsec_t;
152 #define TIME_PREC_INV 1000000.0
153 #define JROUND(j) (rint(((double) (j))*TIME_PREC_INV)/TIME_PREC_INV)
156 #define TIMESTAMP_MASK(b) (1 << (b))
157 #define INTERVAL_MASK(b) (1 << (b))
159 /* Macros to handle packing and unpacking the typmod field for intervals */
160 #define INTERVAL_FULL_RANGE (0x7FFF)
161 #define INTERVAL_RANGE_MASK (0x7FFF)
162 #define INTERVAL_FULL_PRECISION (0xFFFF)
163 #define INTERVAL_PRECISION_MASK (0xFFFF)
164 #define INTERVAL_TYPMOD(p,r) ((((r) & INTERVAL_RANGE_MASK) << 16) | ((p) & INTERVAL_PRECISION_MASK))
165 #define INTERVAL_PRECISION(t) ((t) & INTERVAL_PRECISION_MASK)
166 #define INTERVAL_RANGE(t) (((t) >> 16) & INTERVAL_RANGE_MASK)
169 /* Set at postmaster start */
170 extern TimestampTz PgStartTime;
174 * timestamp.c prototypes
177 extern Datum timestamp_in(PG_FUNCTION_ARGS);
178 extern Datum timestamp_out(PG_FUNCTION_ARGS);
179 extern Datum timestamp_recv(PG_FUNCTION_ARGS);
180 extern Datum timestamp_send(PG_FUNCTION_ARGS);
181 extern Datum timestamp_scale(PG_FUNCTION_ARGS);
182 extern Datum timestamp_eq(PG_FUNCTION_ARGS);
183 extern Datum timestamp_ne(PG_FUNCTION_ARGS);
184 extern Datum timestamp_lt(PG_FUNCTION_ARGS);
185 extern Datum timestamp_le(PG_FUNCTION_ARGS);
186 extern Datum timestamp_ge(PG_FUNCTION_ARGS);
187 extern Datum timestamp_gt(PG_FUNCTION_ARGS);
188 extern Datum timestamp_finite(PG_FUNCTION_ARGS);
189 extern Datum timestamp_cmp(PG_FUNCTION_ARGS);
190 extern Datum timestamp_smaller(PG_FUNCTION_ARGS);
191 extern Datum timestamp_larger(PG_FUNCTION_ARGS);
193 extern Datum timestamp_eq_timestamptz(PG_FUNCTION_ARGS);
194 extern Datum timestamp_ne_timestamptz(PG_FUNCTION_ARGS);
195 extern Datum timestamp_lt_timestamptz(PG_FUNCTION_ARGS);
196 extern Datum timestamp_le_timestamptz(PG_FUNCTION_ARGS);
197 extern Datum timestamp_gt_timestamptz(PG_FUNCTION_ARGS);
198 extern Datum timestamp_ge_timestamptz(PG_FUNCTION_ARGS);
199 extern Datum timestamp_cmp_timestamptz(PG_FUNCTION_ARGS);
201 extern Datum timestamptz_eq_timestamp(PG_FUNCTION_ARGS);
202 extern Datum timestamptz_ne_timestamp(PG_FUNCTION_ARGS);
203 extern Datum timestamptz_lt_timestamp(PG_FUNCTION_ARGS);
204 extern Datum timestamptz_le_timestamp(PG_FUNCTION_ARGS);
205 extern Datum timestamptz_gt_timestamp(PG_FUNCTION_ARGS);
206 extern Datum timestamptz_ge_timestamp(PG_FUNCTION_ARGS);
207 extern Datum timestamptz_cmp_timestamp(PG_FUNCTION_ARGS);
209 extern Datum interval_in(PG_FUNCTION_ARGS);
210 extern Datum interval_out(PG_FUNCTION_ARGS);
211 extern Datum interval_recv(PG_FUNCTION_ARGS);
212 extern Datum interval_send(PG_FUNCTION_ARGS);
213 extern Datum interval_scale(PG_FUNCTION_ARGS);
214 extern Datum interval_eq(PG_FUNCTION_ARGS);
215 extern Datum interval_ne(PG_FUNCTION_ARGS);
216 extern Datum interval_lt(PG_FUNCTION_ARGS);
217 extern Datum interval_le(PG_FUNCTION_ARGS);
218 extern Datum interval_ge(PG_FUNCTION_ARGS);
219 extern Datum interval_gt(PG_FUNCTION_ARGS);
220 extern Datum interval_finite(PG_FUNCTION_ARGS);
221 extern Datum interval_cmp(PG_FUNCTION_ARGS);
222 extern Datum interval_hash(PG_FUNCTION_ARGS);
223 extern Datum interval_smaller(PG_FUNCTION_ARGS);
224 extern Datum interval_larger(PG_FUNCTION_ARGS);
225 extern Datum interval_justify_hours(PG_FUNCTION_ARGS);
226 extern Datum interval_justify_days(PG_FUNCTION_ARGS);
228 extern Datum timestamp_text(PG_FUNCTION_ARGS);
229 extern Datum text_timestamp(PG_FUNCTION_ARGS);
230 extern Datum interval_text(PG_FUNCTION_ARGS);
231 extern Datum text_interval(PG_FUNCTION_ARGS);
232 extern Datum timestamp_trunc(PG_FUNCTION_ARGS);
233 extern Datum interval_trunc(PG_FUNCTION_ARGS);
234 extern Datum timestamp_part(PG_FUNCTION_ARGS);
235 extern Datum interval_part(PG_FUNCTION_ARGS);
236 extern Datum timestamp_zone(PG_FUNCTION_ARGS);
237 extern Datum timestamp_izone(PG_FUNCTION_ARGS);
238 extern Datum timestamp_timestamptz(PG_FUNCTION_ARGS);
240 extern Datum timestamptz_in(PG_FUNCTION_ARGS);
241 extern Datum timestamptz_out(PG_FUNCTION_ARGS);
242 extern Datum timestamptz_recv(PG_FUNCTION_ARGS);
243 extern Datum timestamptz_send(PG_FUNCTION_ARGS);
244 extern Datum timestamptz_scale(PG_FUNCTION_ARGS);
245 extern Datum timestamptz_timestamp(PG_FUNCTION_ARGS);
246 extern Datum timestamptz_zone(PG_FUNCTION_ARGS);
247 extern Datum timestamptz_izone(PG_FUNCTION_ARGS);
248 extern Datum timestamptz_timestamptz(PG_FUNCTION_ARGS);
250 extern Datum interval_um(PG_FUNCTION_ARGS);
251 extern Datum interval_pl(PG_FUNCTION_ARGS);
252 extern Datum interval_mi(PG_FUNCTION_ARGS);
253 extern Datum interval_mul(PG_FUNCTION_ARGS);
254 extern Datum mul_d_interval(PG_FUNCTION_ARGS);
255 extern Datum interval_div(PG_FUNCTION_ARGS);
256 extern Datum interval_accum(PG_FUNCTION_ARGS);
257 extern Datum interval_avg(PG_FUNCTION_ARGS);
259 extern Datum timestamp_mi(PG_FUNCTION_ARGS);
260 extern Datum timestamp_pl_interval(PG_FUNCTION_ARGS);
261 extern Datum timestamp_mi_interval(PG_FUNCTION_ARGS);
262 extern Datum timestamp_age(PG_FUNCTION_ARGS);
263 extern Datum overlaps_timestamp(PG_FUNCTION_ARGS);
265 extern Datum timestamptz_text(PG_FUNCTION_ARGS);
266 extern Datum text_timestamptz(PG_FUNCTION_ARGS);
267 extern Datum timestamptz_pl_interval(PG_FUNCTION_ARGS);
268 extern Datum timestamptz_mi_interval(PG_FUNCTION_ARGS);
269 extern Datum timestamptz_age(PG_FUNCTION_ARGS);
270 extern Datum timestamptz_trunc(PG_FUNCTION_ARGS);
271 extern Datum timestamptz_part(PG_FUNCTION_ARGS);
273 extern Datum now(PG_FUNCTION_ARGS);
275 extern Datum pgsql_postmaster_start_time(PG_FUNCTION_ARGS);
277 /* Internal routines (not fmgr-callable) */
279 extern TimestampTz GetCurrentTimestamp(void);
281 extern int tm2timestamp(struct pg_tm *tm, fsec_t fsec, int *tzp, Timestamp *dt);
282 extern int timestamp2tm(Timestamp dt, int *tzp, struct pg_tm *tm,
283 fsec_t *fsec, char **tzn, pg_tz *attimezone);
284 extern void dt2time(Timestamp dt, int *hour, int *min, int *sec, fsec_t *fsec);
286 extern int interval2tm(Interval span, struct pg_tm *tm, fsec_t *fsec);
287 extern int tm2interval(struct pg_tm *tm, fsec_t fsec, Interval *span);
289 extern Timestamp SetEpochTimestamp(void);
290 extern void GetEpochTime(struct pg_tm *tm);
292 extern int timestamp_cmp_internal(Timestamp dt1, Timestamp dt2);
294 /* timestamp comparison works for timestamptz also */
295 #define timestamptz_cmp_internal(dt1,dt2) timestamp_cmp_internal(dt1, dt2)
297 extern void isoweek2date(int woy, int *year, int *mon, int *mday);
298 extern int date2isoweek(int year, int mon, int mday);
299 extern int date2isoyear(int year, int mon, int mday);
301 #endif /* TIMESTAMP_H */