/*------------------------------------------------------------------------- * * date.c * implements DATE and TIME data types specified in SQL standard * * Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group * Portions Copyright (c) 1994-5, Regents of the University of California * * * IDENTIFICATION * src/backend/utils/adt/date.c * *------------------------------------------------------------------------- */ #include "postgres.h" #include #include #include #include #include "access/hash.h" #include "access/xact.h" #include "libpq/pqformat.h" #include "miscadmin.h" #include "parser/scansup.h" #include "utils/array.h" #include "utils/builtins.h" #include "utils/date.h" #include "utils/datetime.h" #include "utils/nabstime.h" #include "utils/sortsupport.h" /* * gcc's -ffast-math switch breaks routines that expect exact results from * expressions like timeval / SECS_PER_HOUR, where timeval is double. */ #ifdef __FAST_MATH__ #error -ffast-math is known to break this code #endif static int time2tm(TimeADT time, struct pg_tm * tm, fsec_t *fsec); static int timetz2tm(TimeTzADT *time, struct pg_tm * tm, fsec_t *fsec, int *tzp); static int tm2time(struct pg_tm * tm, fsec_t fsec, TimeADT *result); static int tm2timetz(struct pg_tm * tm, fsec_t fsec, int tz, TimeTzADT *result); static void AdjustTimeForTypmod(TimeADT *time, int32 typmod); /* common code for timetypmodin and timetztypmodin */ static int32 anytime_typmodin(bool istz, ArrayType *ta) { int32 *tl; int n; tl = ArrayGetIntegerTypmods(ta, &n); /* * we're not too tense about good error message here because grammar * shouldn't allow wrong number of modifiers for TIME */ if (n != 1) ereport(ERROR, (errcode(ERRCODE_INVALID_PARAMETER_VALUE), errmsg("invalid type modifier"))); return anytime_typmod_check(istz, tl[0]); } /* exported so parse_expr.c can use it */ int32 anytime_typmod_check(bool istz, int32 typmod) { if (typmod < 0) ereport(ERROR, (errcode(ERRCODE_INVALID_PARAMETER_VALUE), errmsg("TIME(%d)%s precision must not be negative", typmod, (istz ? " WITH TIME ZONE" : "")))); if (typmod > MAX_TIME_PRECISION) { ereport(WARNING, (errcode(ERRCODE_INVALID_PARAMETER_VALUE), errmsg("TIME(%d)%s precision reduced to maximum allowed, %d", typmod, (istz ? " WITH TIME ZONE" : ""), MAX_TIME_PRECISION))); typmod = MAX_TIME_PRECISION; } return typmod; } /* common code for timetypmodout and timetztypmodout */ static char * anytime_typmodout(bool istz, int32 typmod) { const char *tz = istz ? " with time zone" : " without time zone"; if (typmod >= 0) return psprintf("(%d)%s", (int) typmod, tz); else return psprintf("%s", tz); } /***************************************************************************** * Date ADT *****************************************************************************/ /* date_in() * Given date text string, convert to internal date format. */ Datum date_in(PG_FUNCTION_ARGS) { char *str = PG_GETARG_CSTRING(0); DateADT date; fsec_t fsec; struct pg_tm tt, *tm = &tt; int tzp; int dtype; int nf; int dterr; char *field[MAXDATEFIELDS]; int ftype[MAXDATEFIELDS]; char workbuf[MAXDATELEN + 1]; dterr = ParseDateTime(str, workbuf, sizeof(workbuf), field, ftype, MAXDATEFIELDS, &nf); if (dterr == 0) dterr = DecodeDateTime(field, ftype, nf, &dtype, tm, &fsec, &tzp); if (dterr != 0) DateTimeParseError(dterr, str, "date"); switch (dtype) { case DTK_DATE: break; case DTK_CURRENT: ereport(ERROR, (errcode(ERRCODE_FEATURE_NOT_SUPPORTED), errmsg("date/time value \"current\" is no longer supported"))); GetCurrentDateTime(tm); break; case DTK_EPOCH: GetEpochTime(tm); break; case DTK_LATE: DATE_NOEND(date); PG_RETURN_DATEADT(date); case DTK_EARLY: DATE_NOBEGIN(date); PG_RETURN_DATEADT(date); default: DateTimeParseError(DTERR_BAD_FORMAT, str, "date"); break; } /* Prevent overflow in Julian-day routines */ if (!IS_VALID_JULIAN(tm->tm_year, tm->tm_mon, tm->tm_mday)) ereport(ERROR, (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE), errmsg("date out of range: \"%s\"", str))); date = date2j(tm->tm_year, tm->tm_mon, tm->tm_mday) - POSTGRES_EPOCH_JDATE; /* Now check for just-out-of-range dates */ if (!IS_VALID_DATE(date)) ereport(ERROR, (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE), errmsg("date out of range: \"%s\"", str))); PG_RETURN_DATEADT(date); } /* date_out() * Given internal format date, convert to text string. */ Datum date_out(PG_FUNCTION_ARGS) { DateADT date = PG_GETARG_DATEADT(0); char *result; struct pg_tm tt, *tm = &tt; char buf[MAXDATELEN + 1]; if (DATE_NOT_FINITE(date)) EncodeSpecialDate(date, buf); else { j2date(date + POSTGRES_EPOCH_JDATE, &(tm->tm_year), &(tm->tm_mon), &(tm->tm_mday)); EncodeDateOnly(tm, DateStyle, buf); } result = pstrdup(buf); PG_RETURN_CSTRING(result); } /* * date_recv - converts external binary format to date */ Datum date_recv(PG_FUNCTION_ARGS) { StringInfo buf = (StringInfo) PG_GETARG_POINTER(0); DateADT result; result = (DateADT) pq_getmsgint(buf, sizeof(DateADT)); /* Limit to the same range that date_in() accepts. */ if (DATE_NOT_FINITE(result)) /* ok */ ; else if (!IS_VALID_DATE(result)) ereport(ERROR, (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE), errmsg("date out of range"))); PG_RETURN_DATEADT(result); } /* * date_send - converts date to binary format */ Datum date_send(PG_FUNCTION_ARGS) { DateADT date = PG_GETARG_DATEADT(0); StringInfoData buf; pq_begintypsend(&buf); pq_sendint(&buf, date, sizeof(date)); PG_RETURN_BYTEA_P(pq_endtypsend(&buf)); } /* * make_date - date constructor */ Datum make_date(PG_FUNCTION_ARGS) { struct pg_tm tm; DateADT date; int dterr; tm.tm_year = PG_GETARG_INT32(0); tm.tm_mon = PG_GETARG_INT32(1); tm.tm_mday = PG_GETARG_INT32(2); /* * Note: we'll reject zero or negative year values. Perhaps negatives * should be allowed to represent BC years? */ dterr = ValidateDate(DTK_DATE_M, false, false, false, &tm); if (dterr != 0) ereport(ERROR, (errcode(ERRCODE_DATETIME_FIELD_OVERFLOW), errmsg("date field value out of range: %d-%02d-%02d", tm.tm_year, tm.tm_mon, tm.tm_mday))); /* Prevent overflow in Julian-day routines */ if (!IS_VALID_JULIAN(tm.tm_year, tm.tm_mon, tm.tm_mday)) ereport(ERROR, (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE), errmsg("date out of range: %d-%02d-%02d", tm.tm_year, tm.tm_mon, tm.tm_mday))); date = date2j(tm.tm_year, tm.tm_mon, tm.tm_mday) - POSTGRES_EPOCH_JDATE; /* Now check for just-out-of-range dates */ if (!IS_VALID_DATE(date)) ereport(ERROR, (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE), errmsg("date out of range: %d-%02d-%02d", tm.tm_year, tm.tm_mon, tm.tm_mday))); PG_RETURN_DATEADT(date); } /* * Convert reserved date values to string. */ void EncodeSpecialDate(DateADT dt, char *str) { if (DATE_IS_NOBEGIN(dt)) strcpy(str, EARLY); else if (DATE_IS_NOEND(dt)) strcpy(str, LATE); else /* shouldn't happen */ elog(ERROR, "invalid argument for EncodeSpecialDate"); } /* * GetSQLCurrentDate -- implements CURRENT_DATE */ DateADT GetSQLCurrentDate(void) { TimestampTz ts; struct pg_tm tt, *tm = &tt; fsec_t fsec; int tz; ts = GetCurrentTransactionStartTimestamp(); if (timestamp2tm(ts, &tz, tm, &fsec, NULL, NULL) != 0) ereport(ERROR, (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE), errmsg("timestamp out of range"))); return date2j(tm->tm_year, tm->tm_mon, tm->tm_mday) - POSTGRES_EPOCH_JDATE; } /* * GetSQLCurrentTime -- implements CURRENT_TIME, CURRENT_TIME(n) */ TimeTzADT * GetSQLCurrentTime(int32 typmod) { TimeTzADT *result; TimestampTz ts; struct pg_tm tt, *tm = &tt; fsec_t fsec; int tz; ts = GetCurrentTransactionStartTimestamp(); if (timestamp2tm(ts, &tz, tm, &fsec, NULL, NULL) != 0) ereport(ERROR, (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE), errmsg("timestamp out of range"))); result = (TimeTzADT *) palloc(sizeof(TimeTzADT)); tm2timetz(tm, fsec, tz, result); AdjustTimeForTypmod(&(result->time), typmod); return result; } /* * GetSQLLocalTime -- implements LOCALTIME, LOCALTIME(n) */ TimeADT GetSQLLocalTime(int32 typmod) { TimeADT result; TimestampTz ts; struct pg_tm tt, *tm = &tt; fsec_t fsec; int tz; ts = GetCurrentTransactionStartTimestamp(); if (timestamp2tm(ts, &tz, tm, &fsec, NULL, NULL) != 0) ereport(ERROR, (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE), errmsg("timestamp out of range"))); tm2time(tm, fsec, &result); AdjustTimeForTypmod(&result, typmod); return result; } /* * Comparison functions for dates */ Datum date_eq(PG_FUNCTION_ARGS) { DateADT dateVal1 = PG_GETARG_DATEADT(0); DateADT dateVal2 = PG_GETARG_DATEADT(1); PG_RETURN_BOOL(dateVal1 == dateVal2); } Datum date_ne(PG_FUNCTION_ARGS) { DateADT dateVal1 = PG_GETARG_DATEADT(0); DateADT dateVal2 = PG_GETARG_DATEADT(1); PG_RETURN_BOOL(dateVal1 != dateVal2); } Datum date_lt(PG_FUNCTION_ARGS) { DateADT dateVal1 = PG_GETARG_DATEADT(0); DateADT dateVal2 = PG_GETARG_DATEADT(1); PG_RETURN_BOOL(dateVal1 < dateVal2); } Datum date_le(PG_FUNCTION_ARGS) { DateADT dateVal1 = PG_GETARG_DATEADT(0); DateADT dateVal2 = PG_GETARG_DATEADT(1); PG_RETURN_BOOL(dateVal1 <= dateVal2); } Datum date_gt(PG_FUNCTION_ARGS) { DateADT dateVal1 = PG_GETARG_DATEADT(0); DateADT dateVal2 = PG_GETARG_DATEADT(1); PG_RETURN_BOOL(dateVal1 > dateVal2); } Datum date_ge(PG_FUNCTION_ARGS) { DateADT dateVal1 = PG_GETARG_DATEADT(0); DateADT dateVal2 = PG_GETARG_DATEADT(1); PG_RETURN_BOOL(dateVal1 >= dateVal2); } Datum date_cmp(PG_FUNCTION_ARGS) { DateADT dateVal1 = PG_GETARG_DATEADT(0); DateADT dateVal2 = PG_GETARG_DATEADT(1); if (dateVal1 < dateVal2) PG_RETURN_INT32(-1); else if (dateVal1 > dateVal2) PG_RETURN_INT32(1); PG_RETURN_INT32(0); } static int date_fastcmp(Datum x, Datum y, SortSupport ssup) { DateADT a = DatumGetDateADT(x); DateADT b = DatumGetDateADT(y); if (a < b) return -1; else if (a > b) return 1; return 0; } Datum date_sortsupport(PG_FUNCTION_ARGS) { SortSupport ssup = (SortSupport) PG_GETARG_POINTER(0); ssup->comparator = date_fastcmp; PG_RETURN_VOID(); } Datum date_finite(PG_FUNCTION_ARGS) { DateADT date = PG_GETARG_DATEADT(0); PG_RETURN_BOOL(!DATE_NOT_FINITE(date)); } Datum date_larger(PG_FUNCTION_ARGS) { DateADT dateVal1 = PG_GETARG_DATEADT(0); DateADT dateVal2 = PG_GETARG_DATEADT(1); PG_RETURN_DATEADT((dateVal1 > dateVal2) ? dateVal1 : dateVal2); } Datum date_smaller(PG_FUNCTION_ARGS) { DateADT dateVal1 = PG_GETARG_DATEADT(0); DateADT dateVal2 = PG_GETARG_DATEADT(1); PG_RETURN_DATEADT((dateVal1 < dateVal2) ? dateVal1 : dateVal2); } /* Compute difference between two dates in days. */ Datum date_mi(PG_FUNCTION_ARGS) { DateADT dateVal1 = PG_GETARG_DATEADT(0); DateADT dateVal2 = PG_GETARG_DATEADT(1); if (DATE_NOT_FINITE(dateVal1) || DATE_NOT_FINITE(dateVal2)) ereport(ERROR, (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE), errmsg("cannot subtract infinite dates"))); PG_RETURN_INT32((int32) (dateVal1 - dateVal2)); } /* Add a number of days to a date, giving a new date. * Must handle both positive and negative numbers of days. */ Datum date_pli(PG_FUNCTION_ARGS) { DateADT dateVal = PG_GETARG_DATEADT(0); int32 days = PG_GETARG_INT32(1); DateADT result; if (DATE_NOT_FINITE(dateVal)) PG_RETURN_DATEADT(dateVal); /* can't change infinity */ result = dateVal + days; /* Check for integer overflow and out-of-allowed-range */ if ((days >= 0 ? (result < dateVal) : (result > dateVal)) || !IS_VALID_DATE(result)) ereport(ERROR, (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE), errmsg("date out of range"))); PG_RETURN_DATEADT(result); } /* Subtract a number of days from a date, giving a new date. */ Datum date_mii(PG_FUNCTION_ARGS) { DateADT dateVal = PG_GETARG_DATEADT(0); int32 days = PG_GETARG_INT32(1); DateADT result; if (DATE_NOT_FINITE(dateVal)) PG_RETURN_DATEADT(dateVal); /* can't change infinity */ result = dateVal - days; /* Check for integer overflow and out-of-allowed-range */ if ((days >= 0 ? (result > dateVal) : (result < dateVal)) || !IS_VALID_DATE(result)) ereport(ERROR, (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE), errmsg("date out of range"))); PG_RETURN_DATEADT(result); } /* * Internal routines for promoting date to timestamp and timestamp with * time zone */ static Timestamp date2timestamp(DateADT dateVal) { Timestamp result; if (DATE_IS_NOBEGIN(dateVal)) TIMESTAMP_NOBEGIN(result); else if (DATE_IS_NOEND(dateVal)) TIMESTAMP_NOEND(result); else { /* * Date's range is wider than timestamp's, so check for boundaries. * Since dates have the same minimum values as timestamps, only upper * boundary need be checked for overflow. */ if (dateVal >= (TIMESTAMP_END_JULIAN - POSTGRES_EPOCH_JDATE)) ereport(ERROR, (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE), errmsg("date out of range for timestamp"))); #ifdef HAVE_INT64_TIMESTAMP /* date is days since 2000, timestamp is microseconds since same... */ result = dateVal * USECS_PER_DAY; #else /* date is days since 2000, timestamp is seconds since same... */ result = dateVal * (double) SECS_PER_DAY; #endif } return result; } static TimestampTz date2timestamptz(DateADT dateVal) { TimestampTz result; struct pg_tm tt, *tm = &tt; int tz; if (DATE_IS_NOBEGIN(dateVal)) TIMESTAMP_NOBEGIN(result); else if (DATE_IS_NOEND(dateVal)) TIMESTAMP_NOEND(result); else { /* * Date's range is wider than timestamp's, so check for boundaries. * Since dates have the same minimum values as timestamps, only upper * boundary need be checked for overflow. */ if (dateVal >= (TIMESTAMP_END_JULIAN - POSTGRES_EPOCH_JDATE)) ereport(ERROR, (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE), errmsg("date out of range for timestamp"))); j2date(dateVal + POSTGRES_EPOCH_JDATE, &(tm->tm_year), &(tm->tm_mon), &(tm->tm_mday)); tm->tm_hour = 0; tm->tm_min = 0; tm->tm_sec = 0; tz = DetermineTimeZoneOffset(tm, session_timezone); #ifdef HAVE_INT64_TIMESTAMP result = dateVal * USECS_PER_DAY + tz * USECS_PER_SEC; #else result = dateVal * (double) SECS_PER_DAY + tz; #endif /* * Since it is possible to go beyond allowed timestamptz range because * of time zone, check for allowed timestamp range after adding tz. */ if (!IS_VALID_TIMESTAMP(result)) ereport(ERROR, (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE), errmsg("date out of range for timestamp"))); } return result; } /* * date2timestamp_no_overflow * * This is chartered to produce a double value that is numerically * equivalent to the corresponding Timestamp value, if the date is in the * valid range of Timestamps, but in any case not throw an overflow error. * We can do this since the numerical range of double is greater than * that of non-erroneous timestamps. The results are currently only * used for statistical estimation purposes. */ double date2timestamp_no_overflow(DateADT dateVal) { double result; if (DATE_IS_NOBEGIN(dateVal)) result = -DBL_MAX; else if (DATE_IS_NOEND(dateVal)) result = DBL_MAX; else { #ifdef HAVE_INT64_TIMESTAMP /* date is days since 2000, timestamp is microseconds since same... */ result = dateVal * (double) USECS_PER_DAY; #else /* date is days since 2000, timestamp is seconds since same... */ result = dateVal * (double) SECS_PER_DAY; #endif } return result; } /* * Crosstype comparison functions for dates */ Datum date_eq_timestamp(PG_FUNCTION_ARGS) { DateADT dateVal = PG_GETARG_DATEADT(0); Timestamp dt2 = PG_GETARG_TIMESTAMP(1); Timestamp dt1; dt1 = date2timestamp(dateVal); PG_RETURN_BOOL(timestamp_cmp_internal(dt1, dt2) == 0); } Datum date_ne_timestamp(PG_FUNCTION_ARGS) { DateADT dateVal = PG_GETARG_DATEADT(0); Timestamp dt2 = PG_GETARG_TIMESTAMP(1); Timestamp dt1; dt1 = date2timestamp(dateVal); PG_RETURN_BOOL(timestamp_cmp_internal(dt1, dt2) != 0); } Datum date_lt_timestamp(PG_FUNCTION_ARGS) { DateADT dateVal = PG_GETARG_DATEADT(0); Timestamp dt2 = PG_GETARG_TIMESTAMP(1); Timestamp dt1; dt1 = date2timestamp(dateVal); PG_RETURN_BOOL(timestamp_cmp_internal(dt1, dt2) < 0); } Datum date_gt_timestamp(PG_FUNCTION_ARGS) { DateADT dateVal = PG_GETARG_DATEADT(0); Timestamp dt2 = PG_GETARG_TIMESTAMP(1); Timestamp dt1; dt1 = date2timestamp(dateVal); PG_RETURN_BOOL(timestamp_cmp_internal(dt1, dt2) > 0); } Datum date_le_timestamp(PG_FUNCTION_ARGS) { DateADT dateVal = PG_GETARG_DATEADT(0); Timestamp dt2 = PG_GETARG_TIMESTAMP(1); Timestamp dt1; dt1 = date2timestamp(dateVal); PG_RETURN_BOOL(timestamp_cmp_internal(dt1, dt2) <= 0); } Datum date_ge_timestamp(PG_FUNCTION_ARGS) { DateADT dateVal = PG_GETARG_DATEADT(0); Timestamp dt2 = PG_GETARG_TIMESTAMP(1); Timestamp dt1; dt1 = date2timestamp(dateVal); PG_RETURN_BOOL(timestamp_cmp_internal(dt1, dt2) >= 0); } Datum date_cmp_timestamp(PG_FUNCTION_ARGS) { DateADT dateVal = PG_GETARG_DATEADT(0); Timestamp dt2 = PG_GETARG_TIMESTAMP(1); Timestamp dt1; dt1 = date2timestamp(dateVal); PG_RETURN_INT32(timestamp_cmp_internal(dt1, dt2)); } Datum date_eq_timestamptz(PG_FUNCTION_ARGS) { DateADT dateVal = PG_GETARG_DATEADT(0); TimestampTz dt2 = PG_GETARG_TIMESTAMPTZ(1); TimestampTz dt1; dt1 = date2timestamptz(dateVal); PG_RETURN_BOOL(timestamptz_cmp_internal(dt1, dt2) == 0); } Datum date_ne_timestamptz(PG_FUNCTION_ARGS) { DateADT dateVal = PG_GETARG_DATEADT(0); TimestampTz dt2 = PG_GETARG_TIMESTAMPTZ(1); TimestampTz dt1; dt1 = date2timestamptz(dateVal); PG_RETURN_BOOL(timestamptz_cmp_internal(dt1, dt2) != 0); } Datum date_lt_timestamptz(PG_FUNCTION_ARGS) { DateADT dateVal = PG_GETARG_DATEADT(0); TimestampTz dt2 = PG_GETARG_TIMESTAMPTZ(1); TimestampTz dt1; dt1 = date2timestamptz(dateVal); PG_RETURN_BOOL(timestamptz_cmp_internal(dt1, dt2) < 0); } Datum date_gt_timestamptz(PG_FUNCTION_ARGS) { DateADT dateVal = PG_GETARG_DATEADT(0); TimestampTz dt2 = PG_GETARG_TIMESTAMPTZ(1); TimestampTz dt1; dt1 = date2timestamptz(dateVal); PG_RETURN_BOOL(timestamptz_cmp_internal(dt1, dt2) > 0); } Datum date_le_timestamptz(PG_FUNCTION_ARGS) { DateADT dateVal = PG_GETARG_DATEADT(0); TimestampTz dt2 = PG_GETARG_TIMESTAMPTZ(1); TimestampTz dt1; dt1 = date2timestamptz(dateVal); PG_RETURN_BOOL(timestamptz_cmp_internal(dt1, dt2) <= 0); } Datum date_ge_timestamptz(PG_FUNCTION_ARGS) { DateADT dateVal = PG_GETARG_DATEADT(0); TimestampTz dt2 = PG_GETARG_TIMESTAMPTZ(1); TimestampTz dt1; dt1 = date2timestamptz(dateVal); PG_RETURN_BOOL(timestamptz_cmp_internal(dt1, dt2) >= 0); } Datum date_cmp_timestamptz(PG_FUNCTION_ARGS) { DateADT dateVal = PG_GETARG_DATEADT(0); TimestampTz dt2 = PG_GETARG_TIMESTAMPTZ(1); TimestampTz dt1; dt1 = date2timestamptz(dateVal); PG_RETURN_INT32(timestamptz_cmp_internal(dt1, dt2)); } Datum timestamp_eq_date(PG_FUNCTION_ARGS) { Timestamp dt1 = PG_GETARG_TIMESTAMP(0); DateADT dateVal = PG_GETARG_DATEADT(1); Timestamp dt2; dt2 = date2timestamp(dateVal); PG_RETURN_BOOL(timestamp_cmp_internal(dt1, dt2) == 0); } Datum timestamp_ne_date(PG_FUNCTION_ARGS) { Timestamp dt1 = PG_GETARG_TIMESTAMP(0); DateADT dateVal = PG_GETARG_DATEADT(1); Timestamp dt2; dt2 = date2timestamp(dateVal); PG_RETURN_BOOL(timestamp_cmp_internal(dt1, dt2) != 0); } Datum timestamp_lt_date(PG_FUNCTION_ARGS) { Timestamp dt1 = PG_GETARG_TIMESTAMP(0); DateADT dateVal = PG_GETARG_DATEADT(1); Timestamp dt2; dt2 = date2timestamp(dateVal); PG_RETURN_BOOL(timestamp_cmp_internal(dt1, dt2) < 0); } Datum timestamp_gt_date(PG_FUNCTION_ARGS) { Timestamp dt1 = PG_GETARG_TIMESTAMP(0); DateADT dateVal = PG_GETARG_DATEADT(1); Timestamp dt2; dt2 = date2timestamp(dateVal); PG_RETURN_BOOL(timestamp_cmp_internal(dt1, dt2) > 0); } Datum timestamp_le_date(PG_FUNCTION_ARGS) { Timestamp dt1 = PG_GETARG_TIMESTAMP(0); DateADT dateVal = PG_GETARG_DATEADT(1); Timestamp dt2; dt2 = date2timestamp(dateVal); PG_RETURN_BOOL(timestamp_cmp_internal(dt1, dt2) <= 0); } Datum timestamp_ge_date(PG_FUNCTION_ARGS) { Timestamp dt1 = PG_GETARG_TIMESTAMP(0); DateADT dateVal = PG_GETARG_DATEADT(1); Timestamp dt2; dt2 = date2timestamp(dateVal); PG_RETURN_BOOL(timestamp_cmp_internal(dt1, dt2) >= 0); } Datum timestamp_cmp_date(PG_FUNCTION_ARGS) { Timestamp dt1 = PG_GETARG_TIMESTAMP(0); DateADT dateVal = PG_GETARG_DATEADT(1); Timestamp dt2; dt2 = date2timestamp(dateVal); PG_RETURN_INT32(timestamp_cmp_internal(dt1, dt2)); } Datum timestamptz_eq_date(PG_FUNCTION_ARGS) { TimestampTz dt1 = PG_GETARG_TIMESTAMPTZ(0); DateADT dateVal = PG_GETARG_DATEADT(1); TimestampTz dt2; dt2 = date2timestamptz(dateVal); PG_RETURN_BOOL(timestamptz_cmp_internal(dt1, dt2) == 0); } Datum timestamptz_ne_date(PG_FUNCTION_ARGS) { TimestampTz dt1 = PG_GETARG_TIMESTAMPTZ(0); DateADT dateVal = PG_GETARG_DATEADT(1); TimestampTz dt2; dt2 = date2timestamptz(dateVal); PG_RETURN_BOOL(timestamptz_cmp_internal(dt1, dt2) != 0); } Datum timestamptz_lt_date(PG_FUNCTION_ARGS) { TimestampTz dt1 = PG_GETARG_TIMESTAMPTZ(0); DateADT dateVal = PG_GETARG_DATEADT(1); TimestampTz dt2; dt2 = date2timestamptz(dateVal); PG_RETURN_BOOL(timestamptz_cmp_internal(dt1, dt2) < 0); } Datum timestamptz_gt_date(PG_FUNCTION_ARGS) { TimestampTz dt1 = PG_GETARG_TIMESTAMPTZ(0); DateADT dateVal = PG_GETARG_DATEADT(1); TimestampTz dt2; dt2 = date2timestamptz(dateVal); PG_RETURN_BOOL(timestamptz_cmp_internal(dt1, dt2) > 0); } Datum timestamptz_le_date(PG_FUNCTION_ARGS) { TimestampTz dt1 = PG_GETARG_TIMESTAMPTZ(0); DateADT dateVal = PG_GETARG_DATEADT(1); TimestampTz dt2; dt2 = date2timestamptz(dateVal); PG_RETURN_BOOL(timestamptz_cmp_internal(dt1, dt2) <= 0); } Datum timestamptz_ge_date(PG_FUNCTION_ARGS) { TimestampTz dt1 = PG_GETARG_TIMESTAMPTZ(0); DateADT dateVal = PG_GETARG_DATEADT(1); TimestampTz dt2; dt2 = date2timestamptz(dateVal); PG_RETURN_BOOL(timestamptz_cmp_internal(dt1, dt2) >= 0); } Datum timestamptz_cmp_date(PG_FUNCTION_ARGS) { TimestampTz dt1 = PG_GETARG_TIMESTAMPTZ(0); DateADT dateVal = PG_GETARG_DATEADT(1); TimestampTz dt2; dt2 = date2timestamptz(dateVal); PG_RETURN_INT32(timestamptz_cmp_internal(dt1, dt2)); } /* Add an interval to a date, giving a new date. * Must handle both positive and negative intervals. * * We implement this by promoting the date to timestamp (without time zone) * and then using the timestamp plus interval function. */ Datum date_pl_interval(PG_FUNCTION_ARGS) { DateADT dateVal = PG_GETARG_DATEADT(0); Interval *span = PG_GETARG_INTERVAL_P(1); Timestamp dateStamp; dateStamp = date2timestamp(dateVal); return DirectFunctionCall2(timestamp_pl_interval, TimestampGetDatum(dateStamp), PointerGetDatum(span)); } /* Subtract an interval from a date, giving a new date. * Must handle both positive and negative intervals. * * We implement this by promoting the date to timestamp (without time zone) * and then using the timestamp minus interval function. */ Datum date_mi_interval(PG_FUNCTION_ARGS) { DateADT dateVal = PG_GETARG_DATEADT(0); Interval *span = PG_GETARG_INTERVAL_P(1); Timestamp dateStamp; dateStamp = date2timestamp(dateVal); return DirectFunctionCall2(timestamp_mi_interval, TimestampGetDatum(dateStamp), PointerGetDatum(span)); } /* date_timestamp() * Convert date to timestamp data type. */ Datum date_timestamp(PG_FUNCTION_ARGS) { DateADT dateVal = PG_GETARG_DATEADT(0); Timestamp result; result = date2timestamp(dateVal); PG_RETURN_TIMESTAMP(result); } /* timestamp_date() * Convert timestamp to date data type. */ Datum timestamp_date(PG_FUNCTION_ARGS) { Timestamp timestamp = PG_GETARG_TIMESTAMP(0); DateADT result; struct pg_tm tt, *tm = &tt; fsec_t fsec; if (TIMESTAMP_IS_NOBEGIN(timestamp)) DATE_NOBEGIN(result); else if (TIMESTAMP_IS_NOEND(timestamp)) DATE_NOEND(result); else { if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL, NULL) != 0) ereport(ERROR, (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE), errmsg("timestamp out of range"))); result = date2j(tm->tm_year, tm->tm_mon, tm->tm_mday) - POSTGRES_EPOCH_JDATE; } PG_RETURN_DATEADT(result); } /* date_timestamptz() * Convert date to timestamp with time zone data type. */ Datum date_timestamptz(PG_FUNCTION_ARGS) { DateADT dateVal = PG_GETARG_DATEADT(0); TimestampTz result; result = date2timestamptz(dateVal); PG_RETURN_TIMESTAMP(result); } /* timestamptz_date() * Convert timestamp with time zone to date data type. */ Datum timestamptz_date(PG_FUNCTION_ARGS) { TimestampTz timestamp = PG_GETARG_TIMESTAMP(0); DateADT result; struct pg_tm tt, *tm = &tt; fsec_t fsec; int tz; if (TIMESTAMP_IS_NOBEGIN(timestamp)) DATE_NOBEGIN(result); else if (TIMESTAMP_IS_NOEND(timestamp)) DATE_NOEND(result); else { if (timestamp2tm(timestamp, &tz, tm, &fsec, NULL, NULL) != 0) ereport(ERROR, (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE), errmsg("timestamp out of range"))); result = date2j(tm->tm_year, tm->tm_mon, tm->tm_mday) - POSTGRES_EPOCH_JDATE; } PG_RETURN_DATEADT(result); } /* abstime_date() * Convert abstime to date data type. */ Datum abstime_date(PG_FUNCTION_ARGS) { AbsoluteTime abstime = PG_GETARG_ABSOLUTETIME(0); DateADT result; struct pg_tm tt, *tm = &tt; int tz; switch (abstime) { case INVALID_ABSTIME: ereport(ERROR, (errcode(ERRCODE_FEATURE_NOT_SUPPORTED), errmsg("cannot convert reserved abstime value to date"))); result = 0; /* keep compiler quiet */ break; case NOSTART_ABSTIME: DATE_NOBEGIN(result); break; case NOEND_ABSTIME: DATE_NOEND(result); break; default: abstime2tm(abstime, &tz, tm, NULL); /* Prevent overflow in Julian-day routines */ if (!IS_VALID_JULIAN(tm->tm_year, tm->tm_mon, tm->tm_mday)) ereport(ERROR, (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE), errmsg("abstime out of range for date"))); result = date2j(tm->tm_year, tm->tm_mon, tm->tm_mday) - POSTGRES_EPOCH_JDATE; /* Now check for just-out-of-range dates */ if (!IS_VALID_DATE(result)) ereport(ERROR, (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE), errmsg("abstime out of range for date"))); break; } PG_RETURN_DATEADT(result); } /***************************************************************************** * Time ADT *****************************************************************************/ Datum time_in(PG_FUNCTION_ARGS) { char *str = PG_GETARG_CSTRING(0); #ifdef NOT_USED Oid typelem = PG_GETARG_OID(1); #endif int32 typmod = PG_GETARG_INT32(2); TimeADT result; fsec_t fsec; struct pg_tm tt, *tm = &tt; int tz; int nf; int dterr; char workbuf[MAXDATELEN + 1]; char *field[MAXDATEFIELDS]; int dtype; int ftype[MAXDATEFIELDS]; dterr = ParseDateTime(str, workbuf, sizeof(workbuf), field, ftype, MAXDATEFIELDS, &nf); if (dterr == 0) dterr = DecodeTimeOnly(field, ftype, nf, &dtype, tm, &fsec, &tz); if (dterr != 0) DateTimeParseError(dterr, str, "time"); tm2time(tm, fsec, &result); AdjustTimeForTypmod(&result, typmod); PG_RETURN_TIMEADT(result); } /* tm2time() * Convert a tm structure to a time data type. */ static int tm2time(struct pg_tm * tm, fsec_t fsec, TimeADT *result) { #ifdef HAVE_INT64_TIMESTAMP *result = ((((tm->tm_hour * MINS_PER_HOUR + tm->tm_min) * SECS_PER_MINUTE) + tm->tm_sec) * USECS_PER_SEC) + fsec; #else *result = ((tm->tm_hour * MINS_PER_HOUR + tm->tm_min) * SECS_PER_MINUTE) + tm->tm_sec + fsec; #endif return 0; } /* time2tm() * Convert time data type to POSIX time structure. * * For dates within the range of pg_time_t, convert to the local time zone. * If out of this range, leave as UTC (in practice that could only happen * if pg_time_t is just 32 bits) - thomas 97/05/27 */ static int time2tm(TimeADT time, struct pg_tm * tm, fsec_t *fsec) { #ifdef HAVE_INT64_TIMESTAMP tm->tm_hour = time / USECS_PER_HOUR; time -= tm->tm_hour * USECS_PER_HOUR; tm->tm_min = time / USECS_PER_MINUTE; time -= tm->tm_min * USECS_PER_MINUTE; tm->tm_sec = time / USECS_PER_SEC; time -= tm->tm_sec * USECS_PER_SEC; *fsec = time; #else double trem; recalc: trem = time; TMODULO(trem, tm->tm_hour, (double) SECS_PER_HOUR); TMODULO(trem, tm->tm_min, (double) SECS_PER_MINUTE); TMODULO(trem, tm->tm_sec, 1.0); trem = TIMEROUND(trem); /* roundoff may need to propagate to higher-order fields */ if (trem >= 1.0) { time = ceil(time); goto recalc; } *fsec = trem; #endif return 0; } Datum time_out(PG_FUNCTION_ARGS) { TimeADT time = PG_GETARG_TIMEADT(0); char *result; struct pg_tm tt, *tm = &tt; fsec_t fsec; char buf[MAXDATELEN + 1]; time2tm(time, tm, &fsec); EncodeTimeOnly(tm, fsec, false, 0, DateStyle, buf); result = pstrdup(buf); PG_RETURN_CSTRING(result); } /* * time_recv - converts external binary format to time * * We make no attempt to provide compatibility between int and float * time representations ... */ Datum time_recv(PG_FUNCTION_ARGS) { StringInfo buf = (StringInfo) PG_GETARG_POINTER(0); #ifdef NOT_USED Oid typelem = PG_GETARG_OID(1); #endif int32 typmod = PG_GETARG_INT32(2); TimeADT result; #ifdef HAVE_INT64_TIMESTAMP result = pq_getmsgint64(buf); if (result < INT64CONST(0) || result > USECS_PER_DAY) ereport(ERROR, (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE), errmsg("time out of range"))); #else result = pq_getmsgfloat8(buf); if (result < 0 || result > (double) SECS_PER_DAY) ereport(ERROR, (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE), errmsg("time out of range"))); #endif AdjustTimeForTypmod(&result, typmod); PG_RETURN_TIMEADT(result); } /* * time_send - converts time to binary format */ Datum time_send(PG_FUNCTION_ARGS) { TimeADT time = PG_GETARG_TIMEADT(0); StringInfoData buf; pq_begintypsend(&buf); #ifdef HAVE_INT64_TIMESTAMP pq_sendint64(&buf, time); #else pq_sendfloat8(&buf, time); #endif PG_RETURN_BYTEA_P(pq_endtypsend(&buf)); } Datum timetypmodin(PG_FUNCTION_ARGS) { ArrayType *ta = PG_GETARG_ARRAYTYPE_P(0); PG_RETURN_INT32(anytime_typmodin(false, ta)); } Datum timetypmodout(PG_FUNCTION_ARGS) { int32 typmod = PG_GETARG_INT32(0); PG_RETURN_CSTRING(anytime_typmodout(false, typmod)); } /* * make_time - time constructor */ Datum make_time(PG_FUNCTION_ARGS) { int tm_hour = PG_GETARG_INT32(0); int tm_min = PG_GETARG_INT32(1); double sec = PG_GETARG_FLOAT8(2); TimeADT time; /* This should match the checks in DecodeTimeOnly */ if (tm_hour < 0 || tm_min < 0 || tm_min > MINS_PER_HOUR - 1 || sec < 0 || sec > SECS_PER_MINUTE || tm_hour > HOURS_PER_DAY || /* test for > 24:00:00 */ (tm_hour == HOURS_PER_DAY && (tm_min > 0 || sec > 0))) ereport(ERROR, (errcode(ERRCODE_DATETIME_FIELD_OVERFLOW), errmsg("time field value out of range: %d:%02d:%02g", tm_hour, tm_min, sec))); /* This should match tm2time */ #ifdef HAVE_INT64_TIMESTAMP time = (((tm_hour * MINS_PER_HOUR + tm_min) * SECS_PER_MINUTE) * USECS_PER_SEC) + rint(sec * USECS_PER_SEC); #else time = ((tm_hour * MINS_PER_HOUR + tm_min) * SECS_PER_MINUTE) + sec; #endif PG_RETURN_TIMEADT(time); } /* time_transform() * Flatten calls to time_scale() and timetz_scale() that solely represent * increases in allowed precision. */ Datum time_transform(PG_FUNCTION_ARGS) { PG_RETURN_POINTER(TemporalTransform(MAX_TIME_PRECISION, (Node *) PG_GETARG_POINTER(0))); } /* time_scale() * Adjust time type for specified scale factor. * Used by PostgreSQL type system to stuff columns. */ Datum time_scale(PG_FUNCTION_ARGS) { TimeADT time = PG_GETARG_TIMEADT(0); int32 typmod = PG_GETARG_INT32(1); TimeADT result; result = time; AdjustTimeForTypmod(&result, typmod); PG_RETURN_TIMEADT(result); } /* AdjustTimeForTypmod() * Force the precision of the time value to a specified value. * Uses *exactly* the same code as in AdjustTimestampForTypemod() * but we make a separate copy because those types do not * have a fundamental tie together but rather a coincidence of * implementation. - thomas */ static void AdjustTimeForTypmod(TimeADT *time, int32 typmod) { #ifdef HAVE_INT64_TIMESTAMP static const int64 TimeScales[MAX_TIME_PRECISION + 1] = { INT64CONST(1000000), INT64CONST(100000), INT64CONST(10000), INT64CONST(1000), INT64CONST(100), INT64CONST(10), INT64CONST(1) }; static const int64 TimeOffsets[MAX_TIME_PRECISION + 1] = { INT64CONST(500000), INT64CONST(50000), INT64CONST(5000), INT64CONST(500), INT64CONST(50), INT64CONST(5), INT64CONST(0) }; #else /* note MAX_TIME_PRECISION differs in this case */ static const double TimeScales[MAX_TIME_PRECISION + 1] = { 1.0, 10.0, 100.0, 1000.0, 10000.0, 100000.0, 1000000.0, 10000000.0, 100000000.0, 1000000000.0, 10000000000.0 }; #endif if (typmod >= 0 && typmod <= MAX_TIME_PRECISION) { /* * Note: this round-to-nearest code is not completely consistent about * rounding values that are exactly halfway between integral values. * On most platforms, rint() will implement round-to-nearest-even, but * the integer code always rounds up (away from zero). Is it worth * trying to be consistent? */ #ifdef HAVE_INT64_TIMESTAMP if (*time >= INT64CONST(0)) *time = ((*time + TimeOffsets[typmod]) / TimeScales[typmod]) * TimeScales[typmod]; else *time = -((((-*time) + TimeOffsets[typmod]) / TimeScales[typmod]) * TimeScales[typmod]); #else *time = rint((double) *time * TimeScales[typmod]) / TimeScales[typmod]; #endif } } Datum time_eq(PG_FUNCTION_ARGS) { TimeADT time1 = PG_GETARG_TIMEADT(0); TimeADT time2 = PG_GETARG_TIMEADT(1); PG_RETURN_BOOL(time1 == time2); } Datum time_ne(PG_FUNCTION_ARGS) { TimeADT time1 = PG_GETARG_TIMEADT(0); TimeADT time2 = PG_GETARG_TIMEADT(1); PG_RETURN_BOOL(time1 != time2); } Datum time_lt(PG_FUNCTION_ARGS) { TimeADT time1 = PG_GETARG_TIMEADT(0); TimeADT time2 = PG_GETARG_TIMEADT(1); PG_RETURN_BOOL(time1 < time2); } Datum time_le(PG_FUNCTION_ARGS) { TimeADT time1 = PG_GETARG_TIMEADT(0); TimeADT time2 = PG_GETARG_TIMEADT(1); PG_RETURN_BOOL(time1 <= time2); } Datum time_gt(PG_FUNCTION_ARGS) { TimeADT time1 = PG_GETARG_TIMEADT(0); TimeADT time2 = PG_GETARG_TIMEADT(1); PG_RETURN_BOOL(time1 > time2); } Datum time_ge(PG_FUNCTION_ARGS) { TimeADT time1 = PG_GETARG_TIMEADT(0); TimeADT time2 = PG_GETARG_TIMEADT(1); PG_RETURN_BOOL(time1 >= time2); } Datum time_cmp(PG_FUNCTION_ARGS) { TimeADT time1 = PG_GETARG_TIMEADT(0); TimeADT time2 = PG_GETARG_TIMEADT(1); if (time1 < time2) PG_RETURN_INT32(-1); if (time1 > time2) PG_RETURN_INT32(1); PG_RETURN_INT32(0); } Datum time_hash(PG_FUNCTION_ARGS) { /* We can use either hashint8 or hashfloat8 directly */ #ifdef HAVE_INT64_TIMESTAMP return hashint8(fcinfo); #else return hashfloat8(fcinfo); #endif } Datum time_larger(PG_FUNCTION_ARGS) { TimeADT time1 = PG_GETARG_TIMEADT(0); TimeADT time2 = PG_GETARG_TIMEADT(1); PG_RETURN_TIMEADT((time1 > time2) ? time1 : time2); } Datum time_smaller(PG_FUNCTION_ARGS) { TimeADT time1 = PG_GETARG_TIMEADT(0); TimeADT time2 = PG_GETARG_TIMEADT(1); PG_RETURN_TIMEADT((time1 < time2) ? time1 : time2); } /* overlaps_time() --- implements the SQL OVERLAPS operator. * * Algorithm is per SQL spec. This is much harder than you'd think * because the spec requires us to deliver a non-null answer in some cases * where some of the inputs are null. */ Datum overlaps_time(PG_FUNCTION_ARGS) { /* * The arguments are TimeADT, but we leave them as generic Datums to avoid * dereferencing nulls (TimeADT is pass-by-reference!) */ Datum ts1 = PG_GETARG_DATUM(0); Datum te1 = PG_GETARG_DATUM(1); Datum ts2 = PG_GETARG_DATUM(2); Datum te2 = PG_GETARG_DATUM(3); bool ts1IsNull = PG_ARGISNULL(0); bool te1IsNull = PG_ARGISNULL(1); bool ts2IsNull = PG_ARGISNULL(2); bool te2IsNull = PG_ARGISNULL(3); #define TIMEADT_GT(t1,t2) \ (DatumGetTimeADT(t1) > DatumGetTimeADT(t2)) #define TIMEADT_LT(t1,t2) \ (DatumGetTimeADT(t1) < DatumGetTimeADT(t2)) /* * If both endpoints of interval 1 are null, the result is null (unknown). * If just one endpoint is null, take ts1 as the non-null one. Otherwise, * take ts1 as the lesser endpoint. */ if (ts1IsNull) { if (te1IsNull) PG_RETURN_NULL(); /* swap null for non-null */ ts1 = te1; te1IsNull = true; } else if (!te1IsNull) { if (TIMEADT_GT(ts1, te1)) { Datum tt = ts1; ts1 = te1; te1 = tt; } } /* Likewise for interval 2. */ if (ts2IsNull) { if (te2IsNull) PG_RETURN_NULL(); /* swap null for non-null */ ts2 = te2; te2IsNull = true; } else if (!te2IsNull) { if (TIMEADT_GT(ts2, te2)) { Datum tt = ts2; ts2 = te2; te2 = tt; } } /* * At this point neither ts1 nor ts2 is null, so we can consider three * cases: ts1 > ts2, ts1 < ts2, ts1 = ts2 */ if (TIMEADT_GT(ts1, ts2)) { /* * This case is ts1 < te2 OR te1 < te2, which may look redundant but * in the presence of nulls it's not quite completely so. */ if (te2IsNull) PG_RETURN_NULL(); if (TIMEADT_LT(ts1, te2)) PG_RETURN_BOOL(true); if (te1IsNull) PG_RETURN_NULL(); /* * If te1 is not null then we had ts1 <= te1 above, and we just found * ts1 >= te2, hence te1 >= te2. */ PG_RETURN_BOOL(false); } else if (TIMEADT_LT(ts1, ts2)) { /* This case is ts2 < te1 OR te2 < te1 */ if (te1IsNull) PG_RETURN_NULL(); if (TIMEADT_LT(ts2, te1)) PG_RETURN_BOOL(true); if (te2IsNull) PG_RETURN_NULL(); /* * If te2 is not null then we had ts2 <= te2 above, and we just found * ts2 >= te1, hence te2 >= te1. */ PG_RETURN_BOOL(false); } else { /* * For ts1 = ts2 the spec says te1 <> te2 OR te1 = te2, which is a * rather silly way of saying "true if both are nonnull, else null". */ if (te1IsNull || te2IsNull) PG_RETURN_NULL(); PG_RETURN_BOOL(true); } #undef TIMEADT_GT #undef TIMEADT_LT } /* timestamp_time() * Convert timestamp to time data type. */ Datum timestamp_time(PG_FUNCTION_ARGS) { Timestamp timestamp = PG_GETARG_TIMESTAMP(0); TimeADT result; struct pg_tm tt, *tm = &tt; fsec_t fsec; if (TIMESTAMP_NOT_FINITE(timestamp)) PG_RETURN_NULL(); if (timestamp2tm(timestamp, NULL, tm, &fsec, NULL, NULL) != 0) ereport(ERROR, (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE), errmsg("timestamp out of range"))); #ifdef HAVE_INT64_TIMESTAMP /* * Could also do this with time = (timestamp / USECS_PER_DAY * * USECS_PER_DAY) - timestamp; */ result = ((((tm->tm_hour * MINS_PER_HOUR + tm->tm_min) * SECS_PER_MINUTE) + tm->tm_sec) * USECS_PER_SEC) + fsec; #else result = ((tm->tm_hour * MINS_PER_HOUR + tm->tm_min) * SECS_PER_MINUTE) + tm->tm_sec + fsec; #endif PG_RETURN_TIMEADT(result); } /* timestamptz_time() * Convert timestamptz to time data type. */ Datum timestamptz_time(PG_FUNCTION_ARGS) { TimestampTz timestamp = PG_GETARG_TIMESTAMP(0); TimeADT result; struct pg_tm tt, *tm = &tt; int tz; fsec_t fsec; if (TIMESTAMP_NOT_FINITE(timestamp)) PG_RETURN_NULL(); if (timestamp2tm(timestamp, &tz, tm, &fsec, NULL, NULL) != 0) ereport(ERROR, (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE), errmsg("timestamp out of range"))); #ifdef HAVE_INT64_TIMESTAMP /* * Could also do this with time = (timestamp / USECS_PER_DAY * * USECS_PER_DAY) - timestamp; */ result = ((((tm->tm_hour * MINS_PER_HOUR + tm->tm_min) * SECS_PER_MINUTE) + tm->tm_sec) * USECS_PER_SEC) + fsec; #else result = ((tm->tm_hour * MINS_PER_HOUR + tm->tm_min) * SECS_PER_MINUTE) + tm->tm_sec + fsec; #endif PG_RETURN_TIMEADT(result); } /* datetime_timestamp() * Convert date and time to timestamp data type. */ Datum datetime_timestamp(PG_FUNCTION_ARGS) { DateADT date = PG_GETARG_DATEADT(0); TimeADT time = PG_GETARG_TIMEADT(1); Timestamp result; result = date2timestamp(date); if (!TIMESTAMP_NOT_FINITE(result)) { result += time; if (!IS_VALID_TIMESTAMP(result)) ereport(ERROR, (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE), errmsg("timestamp out of range"))); } PG_RETURN_TIMESTAMP(result); } /* time_interval() * Convert time to interval data type. */ Datum time_interval(PG_FUNCTION_ARGS) { TimeADT time = PG_GETARG_TIMEADT(0); Interval *result; result = (Interval *) palloc(sizeof(Interval)); result->time = time; result->day = 0; result->month = 0; PG_RETURN_INTERVAL_P(result); } /* interval_time() * Convert interval to time data type. * * This is defined as producing the fractional-day portion of the interval. * Therefore, we can just ignore the months field. It is not real clear * what to do with negative intervals, but we choose to subtract the floor, * so that, say, '-2 hours' becomes '22:00:00'. */ Datum interval_time(PG_FUNCTION_ARGS) { Interval *span = PG_GETARG_INTERVAL_P(0); TimeADT result; #ifdef HAVE_INT64_TIMESTAMP int64 days; result = span->time; if (result >= USECS_PER_DAY) { days = result / USECS_PER_DAY; result -= days * USECS_PER_DAY; } else if (result < 0) { days = (-result + USECS_PER_DAY - 1) / USECS_PER_DAY; result += days * USECS_PER_DAY; } #else result = span->time; if (result >= (double) SECS_PER_DAY || result < 0) result -= floor(result / (double) SECS_PER_DAY) * (double) SECS_PER_DAY; #endif PG_RETURN_TIMEADT(result); } /* time_mi_time() * Subtract two times to produce an interval. */ Datum time_mi_time(PG_FUNCTION_ARGS) { TimeADT time1 = PG_GETARG_TIMEADT(0); TimeADT time2 = PG_GETARG_TIMEADT(1); Interval *result; result = (Interval *) palloc(sizeof(Interval)); result->month = 0; result->day = 0; result->time = time1 - time2; PG_RETURN_INTERVAL_P(result); } /* time_pl_interval() * Add interval to time. */ Datum time_pl_interval(PG_FUNCTION_ARGS) { TimeADT time = PG_GETARG_TIMEADT(0); Interval *span = PG_GETARG_INTERVAL_P(1); TimeADT result; #ifdef HAVE_INT64_TIMESTAMP result = time + span->time; result -= result / USECS_PER_DAY * USECS_PER_DAY; if (result < INT64CONST(0)) result += USECS_PER_DAY; #else TimeADT time1; result = time + span->time; TMODULO(result, time1, (double) SECS_PER_DAY); if (result < 0) result += SECS_PER_DAY; #endif PG_RETURN_TIMEADT(result); } /* time_mi_interval() * Subtract interval from time. */ Datum time_mi_interval(PG_FUNCTION_ARGS) { TimeADT time = PG_GETARG_TIMEADT(0); Interval *span = PG_GETARG_INTERVAL_P(1); TimeADT result; #ifdef HAVE_INT64_TIMESTAMP result = time - span->time; result -= result / USECS_PER_DAY * USECS_PER_DAY; if (result < INT64CONST(0)) result += USECS_PER_DAY; #else TimeADT time1; result = time - span->time; TMODULO(result, time1, (double) SECS_PER_DAY); if (result < 0) result += SECS_PER_DAY; #endif PG_RETURN_TIMEADT(result); } /* time_part() * Extract specified field from time type. */ Datum time_part(PG_FUNCTION_ARGS) { text *units = PG_GETARG_TEXT_PP(0); TimeADT time = PG_GETARG_TIMEADT(1); float8 result; int type, val; char *lowunits; lowunits = downcase_truncate_identifier(VARDATA_ANY(units), VARSIZE_ANY_EXHDR(units), false); type = DecodeUnits(0, lowunits, &val); if (type == UNKNOWN_FIELD) type = DecodeSpecial(0, lowunits, &val); if (type == UNITS) { fsec_t fsec; struct pg_tm tt, *tm = &tt; time2tm(time, tm, &fsec); switch (val) { case DTK_MICROSEC: #ifdef HAVE_INT64_TIMESTAMP result = tm->tm_sec * 1000000.0 + fsec; #else result = (tm->tm_sec + fsec) * 1000000; #endif break; case DTK_MILLISEC: #ifdef HAVE_INT64_TIMESTAMP result = tm->tm_sec * 1000.0 + fsec / 1000.0; #else result = (tm->tm_sec + fsec) * 1000; #endif break; case DTK_SECOND: #ifdef HAVE_INT64_TIMESTAMP result = tm->tm_sec + fsec / 1000000.0; #else result = tm->tm_sec + fsec; #endif break; case DTK_MINUTE: result = tm->tm_min; break; case DTK_HOUR: result = tm->tm_hour; break; case DTK_TZ: case DTK_TZ_MINUTE: case DTK_TZ_HOUR: case DTK_DAY: case DTK_MONTH: case DTK_QUARTER: case DTK_YEAR: case DTK_DECADE: case DTK_CENTURY: case DTK_MILLENNIUM: case DTK_ISOYEAR: default: ereport(ERROR, (errcode(ERRCODE_INVALID_PARAMETER_VALUE), errmsg("\"time\" units \"%s\" not recognized", lowunits))); result = 0; } } else if (type == RESERV && val == DTK_EPOCH) { #ifdef HAVE_INT64_TIMESTAMP result = time / 1000000.0; #else result = time; #endif } else { ereport(ERROR, (errcode(ERRCODE_INVALID_PARAMETER_VALUE), errmsg("\"time\" units \"%s\" not recognized", lowunits))); result = 0; } PG_RETURN_FLOAT8(result); } /***************************************************************************** * Time With Time Zone ADT *****************************************************************************/ /* tm2timetz() * Convert a tm structure to a time data type. */ static int tm2timetz(struct pg_tm * tm, fsec_t fsec, int tz, TimeTzADT *result) { #ifdef HAVE_INT64_TIMESTAMP result->time = ((((tm->tm_hour * MINS_PER_HOUR + tm->tm_min) * SECS_PER_MINUTE) + tm->tm_sec) * USECS_PER_SEC) + fsec; #else result->time = ((tm->tm_hour * MINS_PER_HOUR + tm->tm_min) * SECS_PER_MINUTE) + tm->tm_sec + fsec; #endif result->zone = tz; return 0; } Datum timetz_in(PG_FUNCTION_ARGS) { char *str = PG_GETARG_CSTRING(0); #ifdef NOT_USED Oid typelem = PG_GETARG_OID(1); #endif int32 typmod = PG_GETARG_INT32(2); TimeTzADT *result; fsec_t fsec; struct pg_tm tt, *tm = &tt; int tz; int nf; int dterr; char workbuf[MAXDATELEN + 1]; char *field[MAXDATEFIELDS]; int dtype; int ftype[MAXDATEFIELDS]; dterr = ParseDateTime(str, workbuf, sizeof(workbuf), field, ftype, MAXDATEFIELDS, &nf); if (dterr == 0) dterr = DecodeTimeOnly(field, ftype, nf, &dtype, tm, &fsec, &tz); if (dterr != 0) DateTimeParseError(dterr, str, "time with time zone"); result = (TimeTzADT *) palloc(sizeof(TimeTzADT)); tm2timetz(tm, fsec, tz, result); AdjustTimeForTypmod(&(result->time), typmod); PG_RETURN_TIMETZADT_P(result); } Datum timetz_out(PG_FUNCTION_ARGS) { TimeTzADT *time = PG_GETARG_TIMETZADT_P(0); char *result; struct pg_tm tt, *tm = &tt; fsec_t fsec; int tz; char buf[MAXDATELEN + 1]; timetz2tm(time, tm, &fsec, &tz); EncodeTimeOnly(tm, fsec, true, tz, DateStyle, buf); result = pstrdup(buf); PG_RETURN_CSTRING(result); } /* * timetz_recv - converts external binary format to timetz */ Datum timetz_recv(PG_FUNCTION_ARGS) { StringInfo buf = (StringInfo) PG_GETARG_POINTER(0); #ifdef NOT_USED Oid typelem = PG_GETARG_OID(1); #endif int32 typmod = PG_GETARG_INT32(2); TimeTzADT *result; result = (TimeTzADT *) palloc(sizeof(TimeTzADT)); #ifdef HAVE_INT64_TIMESTAMP result->time = pq_getmsgint64(buf); if (result->time < INT64CONST(0) || result->time > USECS_PER_DAY) ereport(ERROR, (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE), errmsg("time out of range"))); #else result->time = pq_getmsgfloat8(buf); if (result->time < 0 || result->time > (double) SECS_PER_DAY) ereport(ERROR, (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE), errmsg("time out of range"))); #endif result->zone = pq_getmsgint(buf, sizeof(result->zone)); /* Check for sane GMT displacement; see notes in datatype/timestamp.h */ if (result->zone <= -TZDISP_LIMIT || result->zone >= TZDISP_LIMIT) ereport(ERROR, (errcode(ERRCODE_INVALID_TIME_ZONE_DISPLACEMENT_VALUE), errmsg("time zone displacement out of range"))); AdjustTimeForTypmod(&(result->time), typmod); PG_RETURN_TIMETZADT_P(result); } /* * timetz_send - converts timetz to binary format */ Datum timetz_send(PG_FUNCTION_ARGS) { TimeTzADT *time = PG_GETARG_TIMETZADT_P(0); StringInfoData buf; pq_begintypsend(&buf); #ifdef HAVE_INT64_TIMESTAMP pq_sendint64(&buf, time->time); #else pq_sendfloat8(&buf, time->time); #endif pq_sendint(&buf, time->zone, sizeof(time->zone)); PG_RETURN_BYTEA_P(pq_endtypsend(&buf)); } Datum timetztypmodin(PG_FUNCTION_ARGS) { ArrayType *ta = PG_GETARG_ARRAYTYPE_P(0); PG_RETURN_INT32(anytime_typmodin(true, ta)); } Datum timetztypmodout(PG_FUNCTION_ARGS) { int32 typmod = PG_GETARG_INT32(0); PG_RETURN_CSTRING(anytime_typmodout(true, typmod)); } /* timetz2tm() * Convert TIME WITH TIME ZONE data type to POSIX time structure. */ static int timetz2tm(TimeTzADT *time, struct pg_tm * tm, fsec_t *fsec, int *tzp) { TimeOffset trem = time->time; #ifdef HAVE_INT64_TIMESTAMP tm->tm_hour = trem / USECS_PER_HOUR; trem -= tm->tm_hour * USECS_PER_HOUR; tm->tm_min = trem / USECS_PER_MINUTE; trem -= tm->tm_min * USECS_PER_MINUTE; tm->tm_sec = trem / USECS_PER_SEC; *fsec = trem - tm->tm_sec * USECS_PER_SEC; #else recalc: TMODULO(trem, tm->tm_hour, (double) SECS_PER_HOUR); TMODULO(trem, tm->tm_min, (double) SECS_PER_MINUTE); TMODULO(trem, tm->tm_sec, 1.0); trem = TIMEROUND(trem); /* roundoff may need to propagate to higher-order fields */ if (trem >= 1.0) { trem = ceil(time->time); goto recalc; } *fsec = trem; #endif if (tzp != NULL) *tzp = time->zone; return 0; } /* timetz_scale() * Adjust time type for specified scale factor. * Used by PostgreSQL type system to stuff columns. */ Datum timetz_scale(PG_FUNCTION_ARGS) { TimeTzADT *time = PG_GETARG_TIMETZADT_P(0); int32 typmod = PG_GETARG_INT32(1); TimeTzADT *result; result = (TimeTzADT *) palloc(sizeof(TimeTzADT)); result->time = time->time; result->zone = time->zone; AdjustTimeForTypmod(&(result->time), typmod); PG_RETURN_TIMETZADT_P(result); } static int timetz_cmp_internal(TimeTzADT *time1, TimeTzADT *time2) { TimeOffset t1, t2; /* Primary sort is by true (GMT-equivalent) time */ #ifdef HAVE_INT64_TIMESTAMP t1 = time1->time + (time1->zone * USECS_PER_SEC); t2 = time2->time + (time2->zone * USECS_PER_SEC); #else t1 = time1->time + time1->zone; t2 = time2->time + time2->zone; #endif if (t1 > t2) return 1; if (t1 < t2) return -1; /* * If same GMT time, sort by timezone; we only want to say that two * timetz's are equal if both the time and zone parts are equal. */ if (time1->zone > time2->zone) return 1; if (time1->zone < time2->zone) return -1; return 0; } Datum timetz_eq(PG_FUNCTION_ARGS) { TimeTzADT *time1 = PG_GETARG_TIMETZADT_P(0); TimeTzADT *time2 = PG_GETARG_TIMETZADT_P(1); PG_RETURN_BOOL(timetz_cmp_internal(time1, time2) == 0); } Datum timetz_ne(PG_FUNCTION_ARGS) { TimeTzADT *time1 = PG_GETARG_TIMETZADT_P(0); TimeTzADT *time2 = PG_GETARG_TIMETZADT_P(1); PG_RETURN_BOOL(timetz_cmp_internal(time1, time2) != 0); } Datum timetz_lt(PG_FUNCTION_ARGS) { TimeTzADT *time1 = PG_GETARG_TIMETZADT_P(0); TimeTzADT *time2 = PG_GETARG_TIMETZADT_P(1); PG_RETURN_BOOL(timetz_cmp_internal(time1, time2) < 0); } Datum timetz_le(PG_FUNCTION_ARGS) { TimeTzADT *time1 = PG_GETARG_TIMETZADT_P(0); TimeTzADT *time2 = PG_GETARG_TIMETZADT_P(1); PG_RETURN_BOOL(timetz_cmp_internal(time1, time2) <= 0); } Datum timetz_gt(PG_FUNCTION_ARGS) { TimeTzADT *time1 = PG_GETARG_TIMETZADT_P(0); TimeTzADT *time2 = PG_GETARG_TIMETZADT_P(1); PG_RETURN_BOOL(timetz_cmp_internal(time1, time2) > 0); } Datum timetz_ge(PG_FUNCTION_ARGS) { TimeTzADT *time1 = PG_GETARG_TIMETZADT_P(0); TimeTzADT *time2 = PG_GETARG_TIMETZADT_P(1); PG_RETURN_BOOL(timetz_cmp_internal(time1, time2) >= 0); } Datum timetz_cmp(PG_FUNCTION_ARGS) { TimeTzADT *time1 = PG_GETARG_TIMETZADT_P(0); TimeTzADT *time2 = PG_GETARG_TIMETZADT_P(1); PG_RETURN_INT32(timetz_cmp_internal(time1, time2)); } Datum timetz_hash(PG_FUNCTION_ARGS) { TimeTzADT *key = PG_GETARG_TIMETZADT_P(0); uint32 thash; /* * To avoid any problems with padding bytes in the struct, we figure the * field hashes separately and XOR them. This also provides a convenient * framework for dealing with the fact that the time field might be either * double or int64. */ #ifdef HAVE_INT64_TIMESTAMP thash = DatumGetUInt32(DirectFunctionCall1(hashint8, Int64GetDatumFast(key->time))); #else thash = DatumGetUInt32(DirectFunctionCall1(hashfloat8, Float8GetDatumFast(key->time))); #endif thash ^= DatumGetUInt32(hash_uint32(key->zone)); PG_RETURN_UINT32(thash); } Datum timetz_larger(PG_FUNCTION_ARGS) { TimeTzADT *time1 = PG_GETARG_TIMETZADT_P(0); TimeTzADT *time2 = PG_GETARG_TIMETZADT_P(1); TimeTzADT *result; if (timetz_cmp_internal(time1, time2) > 0) result = time1; else result = time2; PG_RETURN_TIMETZADT_P(result); } Datum timetz_smaller(PG_FUNCTION_ARGS) { TimeTzADT *time1 = PG_GETARG_TIMETZADT_P(0); TimeTzADT *time2 = PG_GETARG_TIMETZADT_P(1); TimeTzADT *result; if (timetz_cmp_internal(time1, time2) < 0) result = time1; else result = time2; PG_RETURN_TIMETZADT_P(result); } /* timetz_pl_interval() * Add interval to timetz. */ Datum timetz_pl_interval(PG_FUNCTION_ARGS) { TimeTzADT *time = PG_GETARG_TIMETZADT_P(0); Interval *span = PG_GETARG_INTERVAL_P(1); TimeTzADT *result; #ifndef HAVE_INT64_TIMESTAMP TimeTzADT time1; #endif result = (TimeTzADT *) palloc(sizeof(TimeTzADT)); #ifdef HAVE_INT64_TIMESTAMP result->time = time->time + span->time; result->time -= result->time / USECS_PER_DAY * USECS_PER_DAY; if (result->time < INT64CONST(0)) result->time += USECS_PER_DAY; #else result->time = time->time + span->time; TMODULO(result->time, time1.time, (double) SECS_PER_DAY); if (result->time < 0) result->time += SECS_PER_DAY; #endif result->zone = time->zone; PG_RETURN_TIMETZADT_P(result); } /* timetz_mi_interval() * Subtract interval from timetz. */ Datum timetz_mi_interval(PG_FUNCTION_ARGS) { TimeTzADT *time = PG_GETARG_TIMETZADT_P(0); Interval *span = PG_GETARG_INTERVAL_P(1); TimeTzADT *result; #ifndef HAVE_INT64_TIMESTAMP TimeTzADT time1; #endif result = (TimeTzADT *) palloc(sizeof(TimeTzADT)); #ifdef HAVE_INT64_TIMESTAMP result->time = time->time - span->time; result->time -= result->time / USECS_PER_DAY * USECS_PER_DAY; if (result->time < INT64CONST(0)) result->time += USECS_PER_DAY; #else result->time = time->time - span->time; TMODULO(result->time, time1.time, (double) SECS_PER_DAY); if (result->time < 0) result->time += SECS_PER_DAY; #endif result->zone = time->zone; PG_RETURN_TIMETZADT_P(result); } /* overlaps_timetz() --- implements the SQL OVERLAPS operator. * * Algorithm is per SQL spec. This is much harder than you'd think * because the spec requires us to deliver a non-null answer in some cases * where some of the inputs are null. */ Datum overlaps_timetz(PG_FUNCTION_ARGS) { /* * The arguments are TimeTzADT *, but we leave them as generic Datums for * convenience of notation --- and to avoid dereferencing nulls. */ Datum ts1 = PG_GETARG_DATUM(0); Datum te1 = PG_GETARG_DATUM(1); Datum ts2 = PG_GETARG_DATUM(2); Datum te2 = PG_GETARG_DATUM(3); bool ts1IsNull = PG_ARGISNULL(0); bool te1IsNull = PG_ARGISNULL(1); bool ts2IsNull = PG_ARGISNULL(2); bool te2IsNull = PG_ARGISNULL(3); #define TIMETZ_GT(t1,t2) \ DatumGetBool(DirectFunctionCall2(timetz_gt,t1,t2)) #define TIMETZ_LT(t1,t2) \ DatumGetBool(DirectFunctionCall2(timetz_lt,t1,t2)) /* * If both endpoints of interval 1 are null, the result is null (unknown). * If just one endpoint is null, take ts1 as the non-null one. Otherwise, * take ts1 as the lesser endpoint. */ if (ts1IsNull) { if (te1IsNull) PG_RETURN_NULL(); /* swap null for non-null */ ts1 = te1; te1IsNull = true; } else if (!te1IsNull) { if (TIMETZ_GT(ts1, te1)) { Datum tt = ts1; ts1 = te1; te1 = tt; } } /* Likewise for interval 2. */ if (ts2IsNull) { if (te2IsNull) PG_RETURN_NULL(); /* swap null for non-null */ ts2 = te2; te2IsNull = true; } else if (!te2IsNull) { if (TIMETZ_GT(ts2, te2)) { Datum tt = ts2; ts2 = te2; te2 = tt; } } /* * At this point neither ts1 nor ts2 is null, so we can consider three * cases: ts1 > ts2, ts1 < ts2, ts1 = ts2 */ if (TIMETZ_GT(ts1, ts2)) { /* * This case is ts1 < te2 OR te1 < te2, which may look redundant but * in the presence of nulls it's not quite completely so. */ if (te2IsNull) PG_RETURN_NULL(); if (TIMETZ_LT(ts1, te2)) PG_RETURN_BOOL(true); if (te1IsNull) PG_RETURN_NULL(); /* * If te1 is not null then we had ts1 <= te1 above, and we just found * ts1 >= te2, hence te1 >= te2. */ PG_RETURN_BOOL(false); } else if (TIMETZ_LT(ts1, ts2)) { /* This case is ts2 < te1 OR te2 < te1 */ if (te1IsNull) PG_RETURN_NULL(); if (TIMETZ_LT(ts2, te1)) PG_RETURN_BOOL(true); if (te2IsNull) PG_RETURN_NULL(); /* * If te2 is not null then we had ts2 <= te2 above, and we just found * ts2 >= te1, hence te2 >= te1. */ PG_RETURN_BOOL(false); } else { /* * For ts1 = ts2 the spec says te1 <> te2 OR te1 = te2, which is a * rather silly way of saying "true if both are nonnull, else null". */ if (te1IsNull || te2IsNull) PG_RETURN_NULL(); PG_RETURN_BOOL(true); } #undef TIMETZ_GT #undef TIMETZ_LT } Datum timetz_time(PG_FUNCTION_ARGS) { TimeTzADT *timetz = PG_GETARG_TIMETZADT_P(0); TimeADT result; /* swallow the time zone and just return the time */ result = timetz->time; PG_RETURN_TIMEADT(result); } Datum time_timetz(PG_FUNCTION_ARGS) { TimeADT time = PG_GETARG_TIMEADT(0); TimeTzADT *result; struct pg_tm tt, *tm = &tt; fsec_t fsec; int tz; GetCurrentDateTime(tm); time2tm(time, tm, &fsec); tz = DetermineTimeZoneOffset(tm, session_timezone); result = (TimeTzADT *) palloc(sizeof(TimeTzADT)); result->time = time; result->zone = tz; PG_RETURN_TIMETZADT_P(result); } /* timestamptz_timetz() * Convert timestamp to timetz data type. */ Datum timestamptz_timetz(PG_FUNCTION_ARGS) { TimestampTz timestamp = PG_GETARG_TIMESTAMP(0); TimeTzADT *result; struct pg_tm tt, *tm = &tt; int tz; fsec_t fsec; if (TIMESTAMP_NOT_FINITE(timestamp)) PG_RETURN_NULL(); if (timestamp2tm(timestamp, &tz, tm, &fsec, NULL, NULL) != 0) ereport(ERROR, (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE), errmsg("timestamp out of range"))); result = (TimeTzADT *) palloc(sizeof(TimeTzADT)); tm2timetz(tm, fsec, tz, result); PG_RETURN_TIMETZADT_P(result); } /* datetimetz_timestamptz() * Convert date and timetz to timestamp with time zone data type. * Timestamp is stored in GMT, so add the time zone * stored with the timetz to the result. * - thomas 2000-03-10 */ Datum datetimetz_timestamptz(PG_FUNCTION_ARGS) { DateADT date = PG_GETARG_DATEADT(0); TimeTzADT *time = PG_GETARG_TIMETZADT_P(1); TimestampTz result; if (DATE_IS_NOBEGIN(date)) TIMESTAMP_NOBEGIN(result); else if (DATE_IS_NOEND(date)) TIMESTAMP_NOEND(result); else { /* * Date's range is wider than timestamp's, so check for boundaries. * Since dates have the same minimum values as timestamps, only upper * boundary need be checked for overflow. */ if (date >= (TIMESTAMP_END_JULIAN - POSTGRES_EPOCH_JDATE)) ereport(ERROR, (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE), errmsg("date out of range for timestamp"))); #ifdef HAVE_INT64_TIMESTAMP result = date * USECS_PER_DAY + time->time + time->zone * USECS_PER_SEC; #else result = date * (double) SECS_PER_DAY + time->time + time->zone; #endif /* * Since it is possible to go beyond allowed timestamptz range because * of time zone, check for allowed timestamp range after adding tz. */ if (!IS_VALID_TIMESTAMP(result)) ereport(ERROR, (errcode(ERRCODE_DATETIME_VALUE_OUT_OF_RANGE), errmsg("date out of range for timestamp"))); } PG_RETURN_TIMESTAMP(result); } /* timetz_part() * Extract specified field from time type. */ Datum timetz_part(PG_FUNCTION_ARGS) { text *units = PG_GETARG_TEXT_PP(0); TimeTzADT *time = PG_GETARG_TIMETZADT_P(1); float8 result; int type, val; char *lowunits; lowunits = downcase_truncate_identifier(VARDATA_ANY(units), VARSIZE_ANY_EXHDR(units), false); type = DecodeUnits(0, lowunits, &val); if (type == UNKNOWN_FIELD) type = DecodeSpecial(0, lowunits, &val); if (type == UNITS) { double dummy; int tz; fsec_t fsec; struct pg_tm tt, *tm = &tt; timetz2tm(time, tm, &fsec, &tz); switch (val) { case DTK_TZ: result = -tz; break; case DTK_TZ_MINUTE: result = -tz; result /= SECS_PER_MINUTE; FMODULO(result, dummy, (double) SECS_PER_MINUTE); break; case DTK_TZ_HOUR: dummy = -tz; FMODULO(dummy, result, (double) SECS_PER_HOUR); break; case DTK_MICROSEC: #ifdef HAVE_INT64_TIMESTAMP result = tm->tm_sec * 1000000.0 + fsec; #else result = (tm->tm_sec + fsec) * 1000000; #endif break; case DTK_MILLISEC: #ifdef HAVE_INT64_TIMESTAMP result = tm->tm_sec * 1000.0 + fsec / 1000.0; #else result = (tm->tm_sec + fsec) * 1000; #endif break; case DTK_SECOND: #ifdef HAVE_INT64_TIMESTAMP result = tm->tm_sec + fsec / 1000000.0; #else result = tm->tm_sec + fsec; #endif break; case DTK_MINUTE: result = tm->tm_min; break; case DTK_HOUR: result = tm->tm_hour; break; case DTK_DAY: case DTK_MONTH: case DTK_QUARTER: case DTK_YEAR: case DTK_DECADE: case DTK_CENTURY: case DTK_MILLENNIUM: default: ereport(ERROR, (errcode(ERRCODE_INVALID_PARAMETER_VALUE), errmsg("\"time with time zone\" units \"%s\" not recognized", lowunits))); result = 0; } } else if (type == RESERV && val == DTK_EPOCH) { #ifdef HAVE_INT64_TIMESTAMP result = time->time / 1000000.0 + time->zone; #else result = time->time + time->zone; #endif } else { ereport(ERROR, (errcode(ERRCODE_INVALID_PARAMETER_VALUE), errmsg("\"time with time zone\" units \"%s\" not recognized", lowunits))); result = 0; } PG_RETURN_FLOAT8(result); } /* timetz_zone() * Encode time with time zone type with specified time zone. * Applies DST rules as of the current date. */ Datum timetz_zone(PG_FUNCTION_ARGS) { text *zone = PG_GETARG_TEXT_PP(0); TimeTzADT *t = PG_GETARG_TIMETZADT_P(1); TimeTzADT *result; int tz; char tzname[TZ_STRLEN_MAX + 1]; char *lowzone; int type, val; pg_tz *tzp; /* * Look up the requested timezone. First we look in the timezone * abbreviation table (to handle cases like "EST"), and if that fails, we * look in the timezone database (to handle cases like * "America/New_York"). (This matches the order in which timestamp input * checks the cases; it's important because the timezone database unwisely * uses a few zone names that are identical to offset abbreviations.) */ text_to_cstring_buffer(zone, tzname, sizeof(tzname)); /* DecodeTimezoneAbbrev requires lowercase input */ lowzone = downcase_truncate_identifier(tzname, strlen(tzname), false); type = DecodeTimezoneAbbrev(0, lowzone, &val, &tzp); if (type == TZ || type == DTZ) { /* fixed-offset abbreviation */ tz = -val; } else if (type == DYNTZ) { /* dynamic-offset abbreviation, resolve using current time */ pg_time_t now = (pg_time_t) time(NULL); struct pg_tm *tm; tm = pg_localtime(&now, tzp); tz = DetermineTimeZoneAbbrevOffset(tm, tzname, tzp); } else { /* try it as a full zone name */ tzp = pg_tzset(tzname); if (tzp) { /* Get the offset-from-GMT that is valid today for the zone */ pg_time_t now = (pg_time_t) time(NULL); struct pg_tm *tm; tm = pg_localtime(&now, tzp); tz = -tm->tm_gmtoff; } else { ereport(ERROR, (errcode(ERRCODE_INVALID_PARAMETER_VALUE), errmsg("time zone \"%s\" not recognized", tzname))); tz = 0; /* keep compiler quiet */ } } result = (TimeTzADT *) palloc(sizeof(TimeTzADT)); #ifdef HAVE_INT64_TIMESTAMP result->time = t->time + (t->zone - tz) * USECS_PER_SEC; while (result->time < INT64CONST(0)) result->time += USECS_PER_DAY; while (result->time >= USECS_PER_DAY) result->time -= USECS_PER_DAY; #else result->time = t->time + (t->zone - tz); while (result->time < 0) result->time += SECS_PER_DAY; while (result->time >= SECS_PER_DAY) result->time -= SECS_PER_DAY; #endif result->zone = tz; PG_RETURN_TIMETZADT_P(result); } /* timetz_izone() * Encode time with time zone type with specified time interval as time zone. */ Datum timetz_izone(PG_FUNCTION_ARGS) { Interval *zone = PG_GETARG_INTERVAL_P(0); TimeTzADT *time = PG_GETARG_TIMETZADT_P(1); TimeTzADT *result; int tz; if (zone->month != 0 || zone->day != 0) ereport(ERROR, (errcode(ERRCODE_INVALID_PARAMETER_VALUE), errmsg("interval time zone \"%s\" must not include months or days", DatumGetCString(DirectFunctionCall1(interval_out, PointerGetDatum(zone)))))); #ifdef HAVE_INT64_TIMESTAMP tz = -(zone->time / USECS_PER_SEC); #else tz = -(zone->time); #endif result = (TimeTzADT *) palloc(sizeof(TimeTzADT)); #ifdef HAVE_INT64_TIMESTAMP result->time = time->time + (time->zone - tz) * USECS_PER_SEC; while (result->time < INT64CONST(0)) result->time += USECS_PER_DAY; while (result->time >= USECS_PER_DAY) result->time -= USECS_PER_DAY; #else result->time = time->time + (time->zone - tz); while (result->time < 0) result->time += SECS_PER_DAY; while (result->time >= SECS_PER_DAY) result->time -= SECS_PER_DAY; #endif result->zone = tz; PG_RETURN_TIMETZADT_P(result); }