/*-------------------------------------------------------------------------
*
* timestamp.h
- * Definitions for the SQL92 "timestamp" and "interval" types.
+ * Definitions for the SQL "timestamp" and "interval" types.
*
- * Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2014, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $PostgreSQL: pgsql/src/include/utils/timestamp.h,v 1.78 2008/05/04 23:19:24 tgl Exp $
+ * src/include/utils/timestamp.h
*
*-------------------------------------------------------------------------
*/
#ifndef TIMESTAMP_H
#define TIMESTAMP_H
-#include <math.h>
-#include <limits.h>
-#include <float.h>
-
+#include "datatype/timestamp.h"
#include "fmgr.h"
#include "pgtime.h"
-#ifdef HAVE_INT64_TIMESTAMP
-#include "utils/int8.h"
-#endif
-/*
- * Timestamp represents absolute time.
- *
- * Interval represents delta time. Keep track of months (and years), days,
- * and hours/minutes/seconds 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
- *
- * We have two implementations, one that uses int64 values with units of
- * microseconds, and one that uses double values with units of seconds.
- *
- * TimeOffset and fsec_t are convenience typedefs for temporary variables
- * that are of different types in the two cases. Do not use fsec_t in values
- * stored on-disk, since it is not the same size in both implementations.
- */
-
-#ifdef HAVE_INT64_TIMESTAMP
-
-typedef int64 Timestamp;
-typedef int64 TimestampTz;
-typedef int64 TimeOffset;
-typedef int32 fsec_t; /* fractional seconds (in microseconds) */
-
-#else
-
-typedef double Timestamp;
-typedef double TimestampTz;
-typedef double TimeOffset;
-typedef double fsec_t; /* fractional seconds (in seconds) */
-
-#endif
-
-typedef struct
-{
- TimeOffset time; /* all time units other than days, months and
- * years */
- int32 day; /* days, after time for alignment */
- int32 month; /* months and years, after time for alignment */
-} Interval;
-
-
-#define MAX_TIMESTAMP_PRECISION 6
-#define MAX_INTERVAL_PRECISION 6
-
-/* in both timestamp.h and ecpg/dt.h */
-#define DAYS_PER_YEAR 365.25 /* assumes leap year every four years */
-#define MONTHS_PER_YEAR 12
-/*
- * DAYS_PER_MONTH is very imprecise. The more accurate value is
- * 365.2425/12 = 30.436875, or '30 days 10:29:06'. Right now we only
- * return an integral number of days, but someday perhaps we should
- * also return a 'time' value to be used as well. ISO 8601 suggests
- * 30 days.
- */
-#define DAYS_PER_MONTH 30 /* assumes exactly 30 days per month */
-#define HOURS_PER_DAY 24 /* assume no daylight savings time changes */
-
-/*
- * This doesn't adjust for uneven daylight savings time intervals or leap
- * seconds, and it crudely estimates leap years. A more accurate value
- * for days per years is 365.2422.
- */
-#define SECS_PER_YEAR (36525 * 864) /* avoid floating-point computation */
-#define SECS_PER_DAY 86400
-#define SECS_PER_HOUR 3600
-#define SECS_PER_MINUTE 60
-#define MINS_PER_HOUR 60
-
-#ifdef HAVE_INT64_TIMESTAMP
-#define USECS_PER_DAY INT64CONST(86400000000)
-#define USECS_PER_HOUR INT64CONST(3600000000)
-#define USECS_PER_MINUTE INT64CONST(60000000)
-#define USECS_PER_SEC INT64CONST(1000000)
-#endif
/*
* Macros for fmgr-callable functions.
#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 DT_NOBEGIN (-INT64CONST(0x7fffffffffffffff) - 1)
-#define DT_NOEND (INT64CONST(0x7fffffffffffffff))
-
-#else /* !HAVE_INT64_TIMESTAMP */
+#else /* !HAVE_INT64_TIMESTAMP */
#define DatumGetTimestamp(X) ((Timestamp) DatumGetFloat8(X))
#define DatumGetTimestampTz(X) ((TimestampTz) DatumGetFloat8(X))
#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
-
#endif /* HAVE_INT64_TIMESTAMP */
-#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))
-
-/*
- * Round off to MAX_TIMESTAMP_PRECISION decimal places.
- * Note: this is also used for rounding off intervals.
- */
-#define TS_PREC_INV 1000000.0
-#define TSROUND(j) (rint(((double) (j)) * TS_PREC_INV) / TS_PREC_INV)
-
#define TIMESTAMP_MASK(b) (1 << (b))
#define INTERVAL_MASK(b) (1 << (b))
/* Set at postmaster start */
extern TimestampTz PgStartTime;
+
/* Set at configuration reload */
extern TimestampTz PgReloadTime;
extern Datum timestamp_send(PG_FUNCTION_ARGS);
extern Datum timestamptypmodin(PG_FUNCTION_ARGS);
extern Datum timestamptypmodout(PG_FUNCTION_ARGS);
+extern Datum timestamp_transform(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_gt(PG_FUNCTION_ARGS);
extern Datum timestamp_finite(PG_FUNCTION_ARGS);
extern Datum timestamp_cmp(PG_FUNCTION_ARGS);
+extern Datum timestamp_sortsupport(PG_FUNCTION_ARGS);
extern Datum timestamp_hash(PG_FUNCTION_ARGS);
extern Datum timestamp_smaller(PG_FUNCTION_ARGS);
extern Datum timestamp_larger(PG_FUNCTION_ARGS);
extern Datum timestamp_ge_timestamptz(PG_FUNCTION_ARGS);
extern Datum timestamp_cmp_timestamptz(PG_FUNCTION_ARGS);
+extern Datum make_timestamp(PG_FUNCTION_ARGS);
+extern Datum make_timestamptz(PG_FUNCTION_ARGS);
+extern Datum make_timestamptz_at_timezone(PG_FUNCTION_ARGS);
+
extern Datum timestamptz_eq_timestamp(PG_FUNCTION_ARGS);
extern Datum timestamptz_ne_timestamp(PG_FUNCTION_ARGS);
extern Datum timestamptz_lt_timestamp(PG_FUNCTION_ARGS);
extern Datum interval_send(PG_FUNCTION_ARGS);
extern Datum intervaltypmodin(PG_FUNCTION_ARGS);
extern Datum intervaltypmodout(PG_FUNCTION_ARGS);
+extern Datum interval_transform(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_justify_interval(PG_FUNCTION_ARGS);
extern Datum interval_justify_hours(PG_FUNCTION_ARGS);
extern Datum interval_justify_days(PG_FUNCTION_ARGS);
+extern Datum make_interval(PG_FUNCTION_ARGS);
extern Datum timestamp_trunc(PG_FUNCTION_ARGS);
extern Datum interval_trunc(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_accum_inv(PG_FUNCTION_ARGS);
extern Datum interval_avg(PG_FUNCTION_ARGS);
extern Datum timestamp_mi(PG_FUNCTION_ARGS);
/* Internal routines (not fmgr-callable) */
extern TimestampTz GetCurrentTimestamp(void);
-
extern void TimestampDifference(TimestampTz start_time, TimestampTz stop_time,
long *secs, int *microsecs);
extern bool TimestampDifferenceExceeds(TimestampTz start_time,
TimestampTz stop_time,
int msec);
+/*
+ * Prototypes for functions to deal with integer timestamps, when the native
+ * format is float timestamps.
+ */
+#ifndef HAVE_INT64_TIMESTAMP
+extern int64 GetCurrentIntegerTimestamp(void);
+extern TimestampTz IntegerTimestampToTimestampTz(int64 timestamp);
+#else
+#define GetCurrentIntegerTimestamp() GetCurrentTimestamp()
+#define IntegerTimestampToTimestampTz(timestamp) (timestamp)
+#endif
+
extern TimestampTz time_t_to_timestamptz(pg_time_t tm);
extern pg_time_t timestamptz_to_time_t(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, char **tzn, pg_tz *attimezone);
+ 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 isoweek2j(int year, int week);
extern void isoweek2date(int woy, int *year, int *mon, int *mday);
-extern void isoweekdate2date(int isoweek, int isowday, 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);
projects / postgresql / blobdiff