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Diffstat (limited to 'src/include/utils/timestamp.h')
| -rw-r--r-- | src/include/utils/timestamp.h | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/src/include/utils/timestamp.h b/src/include/utils/timestamp.h new file mode 100644 index 0000000..d45bf2b --- /dev/null +++ b/src/include/utils/timestamp.h @@ -0,0 +1,116 @@ +/*------------------------------------------------------------------------- + * + * timestamp.h + * Definitions for the SQL "timestamp" and "interval" types. + * + * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group + * Portions Copyright (c) 1994, Regents of the University of California + * + * src/include/utils/timestamp.h + * + *------------------------------------------------------------------------- + */ +#ifndef TIMESTAMP_H +#define TIMESTAMP_H + +#include "datatype/timestamp.h" +#include "fmgr.h" +#include "pgtime.h" + + +/* + * Macros for fmgr-callable functions. + * + * For Timestamp, we make use of the same support routines as for int64. + * Therefore Timestamp is pass-by-reference if and only if int64 is! + */ +#define DatumGetTimestamp(X) ((Timestamp) DatumGetInt64(X)) +#define DatumGetTimestampTz(X) ((TimestampTz) DatumGetInt64(X)) +#define DatumGetIntervalP(X) ((Interval *) DatumGetPointer(X)) + +#define TimestampGetDatum(X) Int64GetDatum(X) +#define TimestampTzGetDatum(X) Int64GetDatum(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) + + +#define TIMESTAMP_MASK(b) (1 << (b)) +#define INTERVAL_MASK(b) (1 << (b)) + +/* Macros to handle packing and unpacking the typmod field for intervals */ +#define INTERVAL_FULL_RANGE (0x7FFF) +#define INTERVAL_RANGE_MASK (0x7FFF) +#define INTERVAL_FULL_PRECISION (0xFFFF) +#define INTERVAL_PRECISION_MASK (0xFFFF) +#define INTERVAL_TYPMOD(p,r) ((((r) & INTERVAL_RANGE_MASK) << 16) | ((p) & INTERVAL_PRECISION_MASK)) +#define INTERVAL_PRECISION(t) ((t) & INTERVAL_PRECISION_MASK) +#define INTERVAL_RANGE(t) (((t) >> 16) & INTERVAL_RANGE_MASK) + +#define TimestampTzPlusMilliseconds(tz,ms) ((tz) + ((ms) * (int64) 1000)) + + +/* Set at postmaster start */ +extern TimestampTz PgStartTime; + +/* Set at configuration reload */ +extern TimestampTz PgReloadTime; + + +/* Internal routines (not fmgr-callable) */ + +extern int32 anytimestamp_typmod_check(bool istz, int32 typmod); + +extern TimestampTz GetCurrentTimestamp(void); +extern TimestampTz GetSQLCurrentTimestamp(int32 typmod); +extern Timestamp GetSQLLocalTimestamp(int32 typmod); +extern void TimestampDifference(TimestampTz start_time, TimestampTz stop_time, + long *secs, int *microsecs); +extern long TimestampDifferenceMilliseconds(TimestampTz start_time, + TimestampTz stop_time); +extern bool TimestampDifferenceExceeds(TimestampTz start_time, + TimestampTz stop_time, + int msec); + +extern TimestampTz time_t_to_timestamptz(pg_time_t tm); +extern pg_time_t timestamptz_to_time_t(TimestampTz t); + +extern const char *timestamptz_to_str(TimestampTz t); + +extern int tm2timestamp(struct pg_tm *tm, fsec_t fsec, int *tzp, Timestamp *dt); +extern int timestamp2tm(Timestamp dt, int *tzp, struct pg_tm *tm, + fsec_t *fsec, const char **tzn, pg_tz *attimezone); +extern void dt2time(Timestamp dt, int *hour, int *min, int *sec, fsec_t *fsec); + +extern int interval2tm(Interval span, struct pg_tm *tm, fsec_t *fsec); +extern int tm2interval(struct pg_tm *tm, fsec_t fsec, Interval *span); + +extern Timestamp SetEpochTimestamp(void); +extern void GetEpochTime(struct pg_tm *tm); + +extern int timestamp_cmp_internal(Timestamp dt1, Timestamp dt2); + +/* timestamp comparison works for timestamptz also */ +#define timestamptz_cmp_internal(dt1,dt2) timestamp_cmp_internal(dt1, dt2) + +extern TimestampTz timestamp2timestamptz_opt_overflow(Timestamp timestamp, + int *overflow); +extern int32 timestamp_cmp_timestamptz_internal(Timestamp timestampVal, + TimestampTz dt2); + +extern int isoweek2j(int year, int week); +extern void isoweek2date(int woy, int *year, int *mon, int *mday); +extern void isoweekdate2date(int isoweek, int wday, int *year, int *mon, int *mday); +extern int date2isoweek(int year, int mon, int mday); +extern int date2isoyear(int year, int mon, int mday); +extern int date2isoyearday(int year, int mon, int mday); + +extern bool TimestampTimestampTzRequiresRewrite(void); + +#endif /* TIMESTAMP_H */ |