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Pass collations to functions in FunctionCallInfoData, not FmgrInfo.

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Since collation is effectively an argument, not a property of the function,
FmgrInfo is really the wrong place for it; and this becomes critical in
cases where a cached FmgrInfo is used for varying purposes that might need
different collation settings.  Fix by passing it in FunctionCallInfoData
instead.  In particular this allows a clean fix for bug #5970 (record_cmp
not working).  This requires touching a bit more code than the original
method, but nobody ever thought that collations would not be an invasive
patch...
This commit is contained in:
Tom Lane
2011-04-12 19:19:24 -04:00
parent 88543ecfec
commit d64713df7e
49 changed files with 552 additions and 418 deletions
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11
src/backend/commands/analyze.c
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@ -1930,8 +1930,6 @@ compute_minimal_stats(VacAttrStatsP stats,
track_cnt = 0;
fmgr_info(mystats->eqfunc, &f_cmpeq);
/* We always use the default collation for statistics */
fmgr_info_set_collation(DEFAULT_COLLATION_OID, &f_cmpeq);
for (i = 0; i < samplerows; i++)
{
@ -1990,7 +1988,10 @@ compute_minimal_stats(VacAttrStatsP stats,
firstcount1 = track_cnt;
for (j = 0; j < track_cnt; j++)
{
if (DatumGetBool(FunctionCall2(&f_cmpeq, value, track[j].value)))
/* We always use the default collation for statistics */
if (DatumGetBool(FunctionCall2Coll(&f_cmpeq,
DEFAULT_COLLATION_OID,
value, track[j].value)))
{
match = true;
break;
@ -2253,8 +2254,6 @@ compute_scalar_stats(VacAttrStatsP stats,
SelectSortFunction(mystats->ltopr, false, &cmpFn, &cmpFlags);
fmgr_info(cmpFn, &f_cmpfn);
/* We always use the default collation for statistics */
fmgr_info_set_collation(DEFAULT_COLLATION_OID, &f_cmpfn);
/* Initial scan to find sortable values */
for (i = 0; i < samplerows; i++)
@ -2729,7 +2728,9 @@ compare_scalars(const void *a, const void *b, void *arg)
CompareScalarsContext *cxt = (CompareScalarsContext *) arg;
int32 compare;
/* We always use the default collation for statistics */
compare = ApplySortFunction(cxt->cmpFn, cxt->cmpFlags,
DEFAULT_COLLATION_OID,
da, false, db, false);
if (compare != 0)
return compare;