Support full POSIX-style time zone: EST+3, PST-3, etc.
We probably support a superset of the spec, but I don't have the spec to confirm this. Update regression tests to include tests for this format.
This commit is contained in:
Thomas G. Lockhart
parent
90c4bab7ea
commit
9e7166096e
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@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/datetime.c,v 1.43 2000/03/14 23:06:36 thomas Exp $
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/datetime.c,v 1.44 2000/03/16 14:36:51 thomas Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -35,6 +35,8 @@
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#define USE_DATE_CACHE 1
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#define ROUND_ALL 0
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static int DecodePosixTimezone(char *str, int *val);
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int day_tab[2][13] = {
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{31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31, 0},
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{31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31, 0}};
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@ -47,15 +49,6 @@ char *days[] = {"Sunday", "Monday", "Tuesday", "Wednesday",
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"Thursday", "Friday", "Saturday", NULL};
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#if 0
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static void GetEpochTime(struct tm * tm);
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#endif
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#define UTIME_MINYEAR (1901)
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#define UTIME_MINMONTH (12)
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#define UTIME_MINDAY (14)
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@ -399,35 +392,6 @@ j2day(int date)
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} /* j2day() */
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#if 0
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static double
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time2t(const int hour, const int min, const double sec)
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{
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return (((hour * 60) + min) * 60) + sec;
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} /* time2t() */
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static void
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dt2time(Timestamp jd, int *hour, int *min, double *sec)
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{
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double time;
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time = jd;
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*hour = (time / 3600);
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time -= ((*hour) * 3600);
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*min = (time / 60);
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time -= ((*min) * 60);
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*sec = JROUND(time);
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return;
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} /* dt2time() */
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#endif
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/*
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* parse and convert date in timestr (the normal interface)
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*
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@ -493,9 +457,12 @@ ParseDateTime(char *timestr, char *lowstr,
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while (isalpha(*cp))
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*lp++ = tolower(*cp++);
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/* full date string with leading text month? */
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/* Full date string with leading text month?
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* Could also be a POSIX time zone...
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*/
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if ((*cp == '-') || (*cp == '/') || (*cp == '.'))
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{
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#if 0
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/*
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* special case of Posix timezone "GMT-0800"
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* Note that other sign (e.g. "GMT+0800"
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@ -512,6 +479,7 @@ ParseDateTime(char *timestr, char *lowstr,
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*cp = '+';
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continue;
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}
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#endif
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ftype[nf] = DTK_DATE;
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while (isdigit(*cp) || (*cp == '-') || (*cp == '/') || (*cp == '.'))
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@ -627,7 +595,21 @@ DecodeDateTime(char **field, int *ftype, int nf,
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switch (ftype[i])
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{
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case DTK_DATE:
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if (DecodeDate(field[i], fmask, &tmask, tm) != 0)
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/* Already have a date?
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* Then this might be a POSIX time zone
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* with an embedded dash (e.g. "PST-3" == "EST")
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* - thomas 2000-03-15
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*/
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if ((fmask & DTK_DATE_M) == DTK_DATE_M)
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{
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if ((tzp == NULL)
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|| (DecodePosixTimezone(field[i], tzp) != 0))
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return -1;
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ftype[i] = DTK_TZ;
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tmask = DTK_M(TZ);
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}
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else if (DecodeDate(field[i], fmask, &tmask, tm) != 0)
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return -1;
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break;
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@ -646,9 +628,29 @@ DecodeDateTime(char **field, int *ftype, int nf,
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case DTK_TZ:
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if (tzp == NULL)
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return -1;
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if (DecodeTimezone(field[i], tzp) != 0)
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return -1;
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tmask = DTK_M(TZ);
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{
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int tz;
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if (DecodeTimezone(field[i], &tz) != 0)
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return -1;
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/* Already have a time zone?
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* Then maybe this is the second field of a POSIX time:
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* EST+3 (equivalent to PST)
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*/
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if ((i > 0) && ((fmask & DTK_M(TZ)) != 0)
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&& (ftype[i-1] == DTK_TZ) && (isalpha(*field[i-1])))
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{
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*tzp -= tz;
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tmask = 0;
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}
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else
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{
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*tzp = tz;
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tmask = DTK_M(TZ);
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}
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}
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break;
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case DTK_NUMBER:
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@ -779,6 +781,7 @@ DecodeDateTime(char **field, int *ftype, int nf,
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if (tzp == NULL)
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return -1;
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*tzp = val * 60;
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ftype[i] = DTK_TZ;
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break;
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case TZ:
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@ -786,25 +789,7 @@ DecodeDateTime(char **field, int *ftype, int nf,
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if (tzp == NULL)
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return -1;
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*tzp = val * 60;
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/* Swallow an immediately succeeding timezone if this is GMT
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* This handles the odd case in FreeBSD of "GMT+0800"
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* but note that we need to flip the sign on this too.
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* Claims to be some sort of POSIX standard format :(
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* - thomas 2000-01-20
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*/
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if ((i < (nf-1)) && (ftype[i+1] == DTK_TZ)
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&& (strcmp(field[i], "gmt") == 0))
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{
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i++;
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if (DecodeTimezone(field[i], tzp) != 0)
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return -1;
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/* flip the sign per POSIX standard */
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*tzp = -(*tzp);
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}
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ftype[i] = DTK_TZ;
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break;
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case IGNORE:
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@ -962,6 +947,19 @@ DecodeTimeOnly(char **field, int *ftype, int nf,
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{
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switch (ftype[i])
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{
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case DTK_DATE:
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/* This might be a POSIX time zone
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* with an embedded dash (e.g. "PST-3" == "EST")
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* - thomas 2000-03-15
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*/
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if ((tzp == NULL)
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|| (DecodePosixTimezone(field[i], tzp) != 0))
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return -1;
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ftype[i] = DTK_TZ;
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tmask = DTK_M(TZ);
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break;
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case DTK_TIME:
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if (DecodeTime(field[i], fmask, &tmask, tm, fsec) != 0)
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return -1;
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@ -970,9 +968,29 @@ DecodeTimeOnly(char **field, int *ftype, int nf,
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case DTK_TZ:
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if (tzp == NULL)
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return -1;
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if (DecodeTimezone(field[i], tzp) != 0)
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return -1;
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tmask = DTK_M(TZ);
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{
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int tz;
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if (DecodeTimezone(field[i], &tz) != 0)
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return -1;
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/* Already have a time zone?
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* Then maybe this is the second field of a POSIX time:
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* EST+3 (equivalent to PST)
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*/
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if ((i > 0) && ((fmask & DTK_M(TZ)) != 0)
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&& (ftype[i-1] == DTK_TZ) && (isalpha(*field[i-1])))
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{
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*tzp -= tz;
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tmask = 0;
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}
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else
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{
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*tzp = tz;
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tmask = DTK_M(TZ);
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}
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}
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break;
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case DTK_NUMBER:
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@ -1015,6 +1033,41 @@ DecodeTimeOnly(char **field, int *ftype, int nf,
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break;
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case DTZMOD:
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/*
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* daylight savings time modifier (solves "MET
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* DST" syntax)
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*/
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tmask |= DTK_M(DTZ);
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tm->tm_isdst = 1;
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if (tzp == NULL)
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return -1;
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*tzp += val * 60;
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break;
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case DTZ:
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/*
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* set mask for TZ here _or_ check for DTZ later
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* when getting default timezone
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*/
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tmask |= DTK_M(TZ);
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tm->tm_isdst = 1;
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if (tzp == NULL)
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return -1;
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*tzp = val * 60;
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ftype[i] = DTK_TZ;
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break;
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case TZ:
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tm->tm_isdst = 0;
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if (tzp == NULL)
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return -1;
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*tzp = val * 60;
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ftype[i] = DTK_TZ;
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break;
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case IGNORE:
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break;
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@ -1486,6 +1539,47 @@ DecodeTimezone(char *str, int *tzp)
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} /* DecodeTimezone() */
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/* DecodePosixTimezone()
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* Interpret string as a POSIX-compatible timezone:
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* PST-hh:mm
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* PST+h
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* - thomas 2000-03-15
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*/
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static int
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DecodePosixTimezone(char *str, int *tzp)
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{
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int val, tz;
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int type;
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char *cp;
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char delim;
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cp = str;
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while ((*cp != '\0') && isalpha(*cp))
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cp++;
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if (DecodeTimezone(cp, &tz) != 0)
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return -1;
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delim = *cp;
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*cp = '\0';
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type = DecodeSpecial(MAXDATEFIELDS-1, str, &val);
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*cp = delim;
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switch(type)
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{
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case DTZ:
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case TZ:
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*tzp = (val * 60) - tz;
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break;
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default:
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return -1;
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}
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return 0;
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} /* DecodePosixTimezone() */
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/* DecodeSpecial()
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* Decode text string using lookup table.
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* Implement a cache lookup since it is likely that dates
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@ -20,29 +20,29 @@ INSERT INTO TEMP_TIMESTAMP (f1)
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WHERE d1 BETWEEN '13-jun-1957' AND '1-jan-1997'
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OR d1 BETWEEN '1-jan-1999' AND '1-jan-2010';
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SELECT '' AS "11", f1 AS timestamp
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SELECT '' AS "15", f1 AS timestamp
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FROM TEMP_TIMESTAMP
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ORDER BY timestamp;
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SELECT '' AS "110", d.f1 AS timestamp, t.f1 AS interval, d.f1 + t.f1 AS plus
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SELECT '' AS "150", d.f1 AS timestamp, t.f1 AS interval, d.f1 + t.f1 AS plus
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FROM TEMP_TIMESTAMP d, INTERVAL_TBL t
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ORDER BY plus, timestamp, interval;
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SELECT '' AS "110", d.f1 AS timestamp, t.f1 AS interval, d.f1 - t.f1 AS minus
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SELECT '' AS "150", d.f1 AS timestamp, t.f1 AS interval, d.f1 - t.f1 AS minus
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FROM TEMP_TIMESTAMP d, INTERVAL_TBL t
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WHERE isfinite(d.f1)
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ORDER BY minus, timestamp, interval;
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SELECT '' AS "11", d.f1 AS timestamp, timestamp '1980-01-06 00:00 GMT' AS gpstime_zero,
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SELECT '' AS "15", d.f1 AS timestamp, timestamp '1980-01-06 00:00 GMT' AS gpstime_zero,
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d.f1 - timestamp '1980-01-06 00:00 GMT' AS difference
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FROM TEMP_TIMESTAMP d
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ORDER BY difference;
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SELECT '' AS "121", d1.f1 AS timestamp1, d2.f1 AS timestamp2, d1.f1 - d2.f1 AS difference
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SELECT '' AS "225", d1.f1 AS timestamp1, d2.f1 AS timestamp2, d1.f1 - d2.f1 AS difference
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FROM TEMP_TIMESTAMP d1, TEMP_TIMESTAMP d2
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ORDER BY timestamp1, timestamp2, difference;
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SELECT '' as fifty, d1 as timestamp,
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SELECT '' as "54", d1 as timestamp,
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date_part('year', d1) AS year, date_part('month', d1) AS month,
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date_part('day',d1) AS day, date_part('hour', d1) AS hour,
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date_part('minute', d1) AS minute, date_part('second', d1) AS second
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@ -66,12 +66,12 @@ SELECT '' AS four, f1 AS abstime,
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-- Conversions
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--
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SELECT '' AS "11", f1 AS timestamp, date( f1) AS date
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SELECT '' AS "15", f1 AS timestamp, date( f1) AS date
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FROM TEMP_TIMESTAMP
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WHERE f1 <> timestamp 'current'
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ORDER BY date;
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SELECT '' AS "11", f1 AS timestamp, abstime( f1) AS abstime
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SELECT '' AS "15", f1 AS timestamp, abstime( f1) AS abstime
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FROM TEMP_TIMESTAMP
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ORDER BY abstime;
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@ -102,13 +102,13 @@ SET DateStyle TO 'US,Postgres';
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SHOW DateStyle;
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SELECT '' AS sixty_two, d1 AS us_postgres FROM TIMESTAMP_TBL;
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SELECT '' AS "66", d1 AS us_postgres FROM TIMESTAMP_TBL;
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SELECT '' AS eight, f1 AS us_postgres FROM ABSTIME_TBL;
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SET DateStyle TO 'US,ISO';
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SELECT '' AS sixty_two, d1 AS us_iso FROM TIMESTAMP_TBL;
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SELECT '' AS "66", d1 AS us_iso FROM TIMESTAMP_TBL;
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SELECT '' AS eight, f1 AS us_iso FROM ABSTIME_TBL;
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@ -116,7 +116,7 @@ SET DateStyle TO 'US,SQL';
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SHOW DateStyle;
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SELECT '' AS sixty_two, d1 AS us_sql FROM TIMESTAMP_TBL;
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SELECT '' AS "66", d1 AS us_sql FROM TIMESTAMP_TBL;
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SELECT '' AS eight, f1 AS us_sql FROM ABSTIME_TBL;
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@ -128,7 +128,7 @@ INSERT INTO TIMESTAMP_TBL VALUES('13/06/1957');
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SELECT count(*) as one FROM TIMESTAMP_TBL WHERE d1 = 'Jun 13 1957';
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SELECT '' AS sixty_three, d1 AS european_postgres FROM TIMESTAMP_TBL;
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SELECT '' AS "67", d1 AS european_postgres FROM TIMESTAMP_TBL;
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SELECT '' AS eight, f1 AS european_postgres FROM ABSTIME_TBL;
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@ -136,7 +136,7 @@ SET DateStyle TO 'European,ISO';
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SHOW DateStyle;
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SELECT '' AS sixty_three, d1 AS european_iso FROM TIMESTAMP_TBL;
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SELECT '' AS "67", d1 AS european_iso FROM TIMESTAMP_TBL;
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SELECT '' AS eight, f1 AS european_iso FROM ABSTIME_TBL;
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@ -144,7 +144,7 @@ SET DateStyle TO 'European,SQL';
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SHOW DateStyle;
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SELECT '' AS sixty_three, d1 AS european_sql FROM TIMESTAMP_TBL;
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SELECT '' AS "67", d1 AS european_sql FROM TIMESTAMP_TBL;
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SELECT '' AS eight, f1 AS european_sql FROM ABSTIME_TBL;
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@ -72,8 +72,11 @@ INSERT INTO TIMESTAMP_TBL VALUES ('19970210 173201 -0800');
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INSERT INTO TIMESTAMP_TBL VALUES ('1997-06-10 17:32:01 -07:00');
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-- POSIX format
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INSERT INTO TIMESTAMP_TBL VALUES ('2000-02-15 23:14:30 GMT+8');
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INSERT INTO TIMESTAMP_TBL VALUES ('2000-02-15 23:14:30 EST+3');
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INSERT INTO TIMESTAMP_TBL VALUES ('2000-03-15 08:14:01 GMT+8');
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INSERT INTO TIMESTAMP_TBL VALUES ('2000-03-15 13:14:02 GMT-1');
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INSERT INTO TIMESTAMP_TBL VALUES ('2000-03-15 12:14:03 GMT -2');
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INSERT INTO TIMESTAMP_TBL VALUES ('2000-03-15 03:14:04 EST+3');
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INSERT INTO TIMESTAMP_TBL VALUES ('2000-03-15 02:14:05 EST +2:00');
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-- Variations for acceptable input formats
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INSERT INTO TIMESTAMP_TBL VALUES ('Feb 10 17:32:01 1997 -0800');
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@ -129,43 +132,45 @@ INSERT INTO TIMESTAMP_TBL VALUES ('Jan 01 17:32:01 2001');
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INSERT INTO TIMESTAMP_TBL VALUES ('Feb 16 17:32:01 -0097');
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INSERT INTO TIMESTAMP_TBL VALUES ('Feb 16 17:32:01 5097 BC');
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SELECT '' AS sixtythree, d1 FROM TIMESTAMP_TBL;
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SELECT '' AS "66", d1 FROM TIMESTAMP_TBL;
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-- Demonstrate functions and operators
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SELECT '' AS fortythree, d1 FROM TIMESTAMP_TBL
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SELECT '' AS "47", d1 FROM TIMESTAMP_TBL
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WHERE d1 > timestamp '1997-01-02' and d1 != timestamp 'current';
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SELECT '' AS fifteen, d1 FROM TIMESTAMP_TBL
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SELECT '' AS "15", d1 FROM TIMESTAMP_TBL
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WHERE d1 < timestamp '1997-01-02' and d1 != timestamp 'current';
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SELECT '' AS one, d1 FROM TIMESTAMP_TBL
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WHERE d1 = timestamp '1997-01-02' and d1 != timestamp 'current';
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||||
|
||||
SELECT '' AS fiftyeight, d1 FROM TIMESTAMP_TBL
|
||||
SELECT '' AS "62", d1 FROM TIMESTAMP_TBL
|
||||
WHERE d1 != timestamp '1997-01-02' and d1 != timestamp 'current';
|
||||
|
||||
SELECT '' AS sixteen, d1 FROM TIMESTAMP_TBL
|
||||
SELECT '' AS "16", d1 FROM TIMESTAMP_TBL
|
||||
WHERE d1 <= timestamp '1997-01-02' and d1 != timestamp 'current';
|
||||
|
||||
SELECT '' AS fortyfour, d1 FROM TIMESTAMP_TBL
|
||||
SELECT '' AS "48", d1 FROM TIMESTAMP_TBL
|
||||
WHERE d1 >= timestamp '1997-01-02' and d1 != timestamp 'current';
|
||||
|
||||
SELECT '' AS sixtythree, d1 + interval '1 year' AS one_year FROM TIMESTAMP_TBL;
|
||||
SELECT '' AS "66", d1 + interval '1 year' AS one_year FROM TIMESTAMP_TBL;
|
||||
|
||||
SELECT '' AS sixtythree, d1 - interval '1 year' AS one_year FROM TIMESTAMP_TBL;
|
||||
SELECT '' AS "66", d1 - interval '1 year' AS one_year FROM TIMESTAMP_TBL;
|
||||
|
||||
-- Casting within a BETWEEN qualifier should probably be allowed by the parser. - tgl 97/04/26
|
||||
--SELECT '' AS fifty, d1 - timestamp '1997-01-02' AS diff
|
||||
-- FROM TIMESTAMP_TBL WHERE d1 BETWEEN timestamp '1902-01-01' AND timestamp '2038-01-01';
|
||||
SELECT '' AS fifty, d1 - timestamp '1997-01-02' AS diff
|
||||
SELECT '' AS "53", d1 - timestamp '1997-01-02' AS diff
|
||||
FROM TIMESTAMP_TBL WHERE d1 BETWEEN '1902-01-01' AND '2038-01-01';
|
||||
|
||||
SELECT '' AS fortynine, date_part( 'year', d1) AS year, date_part( 'month', d1) AS month,
|
||||
-- Test casting within a BETWEEN qualifier
|
||||
SELECT '' AS "53", d1 - timestamp '1997-01-02' AS diff
|
||||
FROM TIMESTAMP_TBL
|
||||
WHERE d1 BETWEEN timestamp '1902-01-01' AND timestamp '2038-01-01';
|
||||
|
||||
SELECT '' AS "53", date_part( 'year', d1) AS year, date_part( 'month', d1) AS month,
|
||||
date_part( 'day', d1) AS day, date_part( 'hour', d1) AS hour,
|
||||
date_part( 'minute', d1) AS minute, date_part( 'second', d1) AS second
|
||||
FROM TIMESTAMP_TBL WHERE d1 BETWEEN '1902-01-01' AND '2038-01-01';
|
||||
|
||||
SELECT '' AS fortynine, date_part( 'quarter', d1) AS quarter, date_part( 'msec', d1) AS msec,
|
||||
SELECT '' AS "53", date_part( 'quarter', d1) AS quarter, date_part( 'msec', d1) AS msec,
|
||||
date_part( 'usec', d1) AS usec
|
||||
FROM TIMESTAMP_TBL WHERE d1 BETWEEN '1902-01-01' AND '2038-01-01';
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue