/*------------------------------------------------------------------------- * * timestamp.h * Definitions for the SQL92 "timestamp" and "interval" types. * * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * * $Id: timestamp.h,v 1.24 2001/11/05 17:46:36 momjian Exp $ * *------------------------------------------------------------------------- */ #ifndef TIMESTAMP_H #define TIMESTAMP_H #include #include #include #include #include "fmgr.h" /* * Timestamp represents absolute time. * Interval represents delta time. Keep track of months (and years) * separately since the elapsed time spanned is unknown until instantiated * relative to an absolute time. * * Note that Postgres uses "time interval" to mean a bounded interval, * consisting of a beginning and ending time, not a time span - thomas 97/03/20 */ typedef double Timestamp; typedef double TimestampTz; typedef struct { double time; /* all time units other than months and * years */ int32 month; /* months and years, after time for * alignment */ } Interval; /* * Macros for fmgr-callable functions. * * For Timestamp, we make use of the same support routines as for float8. * Therefore Timestamp is pass-by-reference if and only if float8 is! */ #define DatumGetTimestamp(X) ((Timestamp) DatumGetFloat8(X)) #define DatumGetTimestampTz(X) ((TimestampTz) DatumGetFloat8(X)) #define DatumGetIntervalP(X) ((Interval *) DatumGetPointer(X)) #define TimestampGetDatum(X) Float8GetDatum(X) #define TimestampTzGetDatum(X) Float8GetDatum(X) #define IntervalPGetDatum(X) PointerGetDatum(X) #define PG_GETARG_TIMESTAMP(n) DatumGetTimestamp(PG_GETARG_DATUM(n)) #define PG_GETARG_TIMESTAMPTZ(n) DatumGetTimestampTz(PG_GETARG_DATUM(n)) #define PG_GETARG_INTERVAL_P(n) DatumGetIntervalP(PG_GETARG_DATUM(n)) #define PG_RETURN_TIMESTAMP(x) return TimestampGetDatum(x) #define PG_RETURN_TIMESTAMPTZ(x) return TimestampTzGetDatum(x) #define PG_RETURN_INTERVAL_P(x) return IntervalPGetDatum(x) #ifdef HUGE_VAL #define DT_NOBEGIN (-HUGE_VAL) #define DT_NOEND (HUGE_VAL) #else #define DT_NOBEGIN (-DBL_MAX) #define DT_NOEND (DBL_MAX) #endif #define TIMESTAMP_NOBEGIN(j) do {j = DT_NOBEGIN;} while (0) #define TIMESTAMP_IS_NOBEGIN(j) ((j) == DT_NOBEGIN) #define TIMESTAMP_NOEND(j) do {j = DT_NOEND;} while (0) #define TIMESTAMP_IS_NOEND(j) ((j) == DT_NOEND) #define TIMESTAMP_NOT_FINITE(j) (TIMESTAMP_IS_NOBEGIN(j) || TIMESTAMP_IS_NOEND(j)) #define TIME_PREC_INV 1000000.0 #define JROUND(j) (rint(((double) (j))*TIME_PREC_INV)/TIME_PREC_INV) /* * timestamp.c prototypes */ extern Datum timestamp_in(PG_FUNCTION_ARGS); extern Datum timestamp_out(PG_FUNCTION_ARGS); extern Datum timestamp_scale(PG_FUNCTION_ARGS); extern Datum timestamp_eq(PG_FUNCTION_ARGS); extern Datum timestamp_ne(PG_FUNCTION_ARGS); extern Datum timestamp_lt(PG_FUNCTION_ARGS); extern Datum timestamp_le(PG_FUNCTION_ARGS); extern Datum timestamp_ge(PG_FUNCTION_ARGS); extern Datum timestamp_gt(PG_FUNCTION_ARGS); extern Datum timestamp_finite(PG_FUNCTION_ARGS); extern Datum timestamp_cmp(PG_FUNCTION_ARGS); extern Datum timestamp_smaller(PG_FUNCTION_ARGS); extern Datum timestamp_larger(PG_FUNCTION_ARGS); extern Datum interval_in(PG_FUNCTION_ARGS); extern Datum interval_out(PG_FUNCTION_ARGS); extern Datum interval_scale(PG_FUNCTION_ARGS); extern Datum interval_eq(PG_FUNCTION_ARGS); extern Datum interval_ne(PG_FUNCTION_ARGS); extern Datum interval_lt(PG_FUNCTION_ARGS); extern Datum interval_le(PG_FUNCTION_ARGS); extern Datum interval_ge(PG_FUNCTION_ARGS); extern Datum interval_gt(PG_FUNCTION_ARGS); extern Datum interval_finite(PG_FUNCTION_ARGS); extern Datum interval_cmp(PG_FUNCTION_ARGS); extern Datum interval_hash(PG_FUNCTION_ARGS); extern Datum interval_smaller(PG_FUNCTION_ARGS); extern Datum interval_larger(PG_FUNCTION_ARGS); extern Datum timestamp_text(PG_FUNCTION_ARGS); extern Datum text_timestamp(PG_FUNCTION_ARGS); extern Datum interval_text(PG_FUNCTION_ARGS); extern Datum text_interval(PG_FUNCTION_ARGS); extern Datum timestamp_trunc(PG_FUNCTION_ARGS); extern Datum interval_trunc(PG_FUNCTION_ARGS); extern Datum timestamp_part(PG_FUNCTION_ARGS); extern Datum interval_part(PG_FUNCTION_ARGS); extern Datum timestamp_zone(PG_FUNCTION_ARGS); extern Datum timestamp_izone(PG_FUNCTION_ARGS); extern Datum timestamp_timestamptz(PG_FUNCTION_ARGS); extern Datum timestamptz_in(PG_FUNCTION_ARGS); extern Datum timestamptz_out(PG_FUNCTION_ARGS); extern Datum timestamptz_scale(PG_FUNCTION_ARGS); extern Datum timestamptz_timestamp(PG_FUNCTION_ARGS); extern Datum timestamptz_zone(PG_FUNCTION_ARGS); extern Datum timestamptz_izone(PG_FUNCTION_ARGS); extern Datum timestamptz_timestamptz(PG_FUNCTION_ARGS); extern Datum interval_um(PG_FUNCTION_ARGS); extern Datum interval_pl(PG_FUNCTION_ARGS); extern Datum interval_mi(PG_FUNCTION_ARGS); extern Datum interval_mul(PG_FUNCTION_ARGS); extern Datum mul_d_interval(PG_FUNCTION_ARGS); extern Datum interval_div(PG_FUNCTION_ARGS); extern Datum interval_accum(PG_FUNCTION_ARGS); extern Datum interval_avg(PG_FUNCTION_ARGS); extern Datum timestamp_mi(PG_FUNCTION_ARGS); extern Datum timestamp_pl_span(PG_FUNCTION_ARGS); extern Datum timestamp_mi_span(PG_FUNCTION_ARGS); extern Datum timestamp_age(PG_FUNCTION_ARGS); extern Datum overlaps_timestamp(PG_FUNCTION_ARGS); extern Datum timestamptz_text(PG_FUNCTION_ARGS); extern Datum text_timestamptz(PG_FUNCTION_ARGS); extern Datum timestamptz_pl_span(PG_FUNCTION_ARGS); extern Datum timestamptz_mi_span(PG_FUNCTION_ARGS); extern Datum timestamptz_age(PG_FUNCTION_ARGS); extern Datum timestamptz_trunc(PG_FUNCTION_ARGS); extern Datum timestamptz_part(PG_FUNCTION_ARGS); extern Datum now(PG_FUNCTION_ARGS); /* Internal routines (not fmgr-callable) */ extern int tm2timestamp(struct tm * tm, double fsec, int *tzp, Timestamp *dt); extern int timestamp2tm(Timestamp dt, int *tzp, struct tm * tm, double *fsec, char **tzn); extern void dt2time(Timestamp dt, int *hour, int *min, double *sec); extern int interval2tm(Interval span, struct tm * tm, float8 *fsec); extern int tm2interval(struct tm * tm, double fsec, Interval *span); extern Timestamp SetEpochTimestamp(void); extern void GetEpochTime(struct tm * tm); extern void isoweek2date(int woy, int *year, int *mon, int *mday); extern int date2isoweek(int year, int mon, int mday); #endif /* TIMESTAMP_H */