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Fixes from Janko Richter <jankorichter@yahoo.de>

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- Fix wrong index results on text, char, varchar for multibyte strings
- Fix some SIGFPE signals
- Add support for infinite timestamps
- Because of locale settings, btree_gist can not be a prefix index anymore (for text).
  Each node holds now just the lower and upper boundary.
This commit is contained in:
Teodor Sigaev
2005-07-01 13:44:56 +00:00
parent 8f6e8e8fed
commit ef770cbb69
27 changed files with 730 additions and 304 deletions
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62
contrib/btree_gist/btree_ts.c
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@ -114,7 +114,7 @@ tstz_to_ts_gmt(Timestamp *gmt, TimestampTz *ts)
*gmt = *ts;
DecodeSpecial(0, "gmt", &val);
if (!TIMESTAMP_NOT_FINITE(*ts))
if ( *ts < DT_NOEND && *ts > DT_NOBEGIN )
{
tz = val * 60;
@ -218,6 +218,14 @@ gbt_ts_union(PG_FUNCTION_ARGS)
}
#define penalty_check_max_float(val) do { \
if ( val > FLT_MAX ) \
val = FLT_MAX; \
if ( val < -FLT_MAX ) \
val = -FLT_MAX; \
} while(false);
Datum
gbt_ts_penalty(PG_FUNCTION_ARGS)
{
@ -225,48 +233,28 @@ gbt_ts_penalty(PG_FUNCTION_ARGS)
tsKEY *origentry = (tsKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
tsKEY *newentry = (tsKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);
float *result = (float *) PG_GETARG_POINTER(2);
Interval *intr;
#ifdef HAVE_INT64_TIMESTAMP
int64 res;
#else
double res;
#endif
double orgdbl[2],
newdbl[2];
intr = DatumGetIntervalP(DirectFunctionCall2(
timestamp_mi,
P_TimestampGetDatum(newentry->upper),
P_TimestampGetDatum(origentry->upper)
));
/*
We are allways using "double" timestamps here.
Precision should be good enough.
*/
orgdbl[0] = ( (double) origentry->lower ) ;
orgdbl[1] = ( (double) origentry->upper ) ;
newdbl[0] = ( (double) newentry->lower ) ;
newdbl[1] = ( (double) newentry->upper ) ;
/* see interval_larger */
penalty_check_max_float( orgdbl[0] );
penalty_check_max_float( orgdbl[1] );
penalty_check_max_float( newdbl[0] );
penalty_check_max_float( newdbl[1] );
res = Max(intr->time + intr->month * (30 * 86400), 0);
intr = DatumGetIntervalP(DirectFunctionCall2(
timestamp_mi,
P_TimestampGetDatum(origentry->lower),
P_TimestampGetDatum(newentry->lower)
));
/* see interval_larger */
res += Max(intr->time + intr->month * (30 * 86400), 0);
*result = 0.0;
if (res > 0)
{
intr = DatumGetIntervalP(DirectFunctionCall2(
timestamp_mi,
P_TimestampGetDatum(origentry->upper),
P_TimestampGetDatum(origentry->lower)
));
*result += FLT_MIN;
*result += (float) (res / ((double) (res + intr->time + intr->month * (30 * 86400))));
*result *= (FLT_MAX / (((GISTENTRY *) PG_GETARG_POINTER(0))->rel->rd_att->natts + 1));
}
penalty_num(result,orgdbl[0],orgdbl[1],newdbl[0],newdbl[1]);
PG_RETURN_POINTER(result);
}