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Add comparision routines and catalog entries to support indices on

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datetime and timespan.
This commit is contained in:
Thomas G. Lockhart
1997-09-04 18:43:59 +00:00
parent bb77313a0a
commit 7c243f83e8
5 changed files with 219 additions and 134 deletions
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57
src/backend/utils/adt/dt.c
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@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/adt/Attic/dt.c,v 1.34 1997/09/01 06:13:21 thomas Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/adt/Attic/dt.c,v 1.35 1997/09/04 18:43:21 thomas Exp $
*
*-------------------------------------------------------------------------
*/
@ -473,6 +473,35 @@ datetime_ge(DateTime *datetime1, DateTime *datetime2)
} /* datetime_ge() */
/* datetime_cmp - 3-state comparison for datetime
* collate invalid datetime at the end
*/
int
datetime_cmp(DateTime *datetime1, DateTime *datetime2)
{
DateTime dt1, dt2;
if (!PointerIsValid(datetime1) || !PointerIsValid(datetime2))
return 0;
dt1 = *datetime1;
dt2 = *datetime2;
if (DATETIME_IS_INVALID(dt1)) {
return( (DATETIME_IS_INVALID(dt2)? 0: 1));
} else if (DATETIME_IS_INVALID(dt2)) {
return( -1);
} else {
if (DATETIME_IS_RELATIVE(dt1)) dt1 = SetDateTime(dt1);
if (DATETIME_IS_RELATIVE(dt2)) dt2 = SetDateTime(dt2);
};
return( ((dt1 < dt2)? -1: ((dt1 > dt2)? 1: 0)));
} /* datetime_cmp() */
/* timespan_relop - is timespan1 relop timespan2
*/
bool
@ -578,6 +607,32 @@ timespan_ge(TimeSpan *timespan1, TimeSpan *timespan2)
} /* timespan_ge() */
/* timespan_cmp - 3-state comparison for timespan
*/
int
timespan_cmp(TimeSpan *timespan1, TimeSpan *timespan2)
{
double span1, span2;
if (!PointerIsValid(timespan1) || !PointerIsValid(timespan2))
return 0;
if (TIMESPAN_IS_INVALID(*timespan1)) {
return( TIMESPAN_IS_INVALID(*timespan2)? 0: 1);
} else if (TIMESPAN_IS_INVALID(*timespan2)) {
return( -1);
};
span1 = timespan1->time;
if (timespan1->month != 0) span1 += (timespan1->month * (30.0*86400));
span2 = timespan2->time;
if (timespan2->month != 0) span2 += (timespan2->month * (30.0*86400));
return( (span1 < span2)? -1: (span1 > span2)? 1: 0);
} /* timespan_cmp() */
/*----------------------------------------------------------
* "Arithmetic" operators on date/times.
* datetime_foo returns foo as an object (pointer) that