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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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10
src/backend/access/gist/gistscan.c
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@ -169,8 +169,7 @@ gistrescan(PG_FUNCTION_ARGS)
* comparisons. The original operator is passed to the Consistent
* function in the form of its strategy number, which is available
* from the sk_strategy field, and its subtype from the sk_subtype
* field. Also, preserve sk_func.fn_collation which is the input
* collation for the operator.
* field.
*
* Next, if any of keys is a NULL and that key is not marked with
* SK_SEARCHNULL/SK_SEARCHNOTNULL then nothing can be found (ie, we
@ -181,10 +180,8 @@ gistrescan(PG_FUNCTION_ARGS)
for (i = 0; i < scan->numberOfKeys; i++)
{
ScanKey skey = scan->keyData + i;
Oid collation = skey->sk_func.fn_collation;
skey->sk_func = so->giststate->consistentFn[skey->sk_attno - 1];
skey->sk_func.fn_collation = collation;
if (skey->sk_flags & SK_ISNULL)
{
@ -205,16 +202,13 @@ gistrescan(PG_FUNCTION_ARGS)
* all comparisons. The original operator is passed to the Distance
* function in the form of its strategy number, which is available
* from the sk_strategy field, and its subtype from the sk_subtype
* field. Also, preserve sk_func.fn_collation which is the input
* collation for the operator.
* field.
*/
for (i = 0; i < scan->numberOfOrderBys; i++)
{
ScanKey skey = scan->orderByData + i;
Oid collation = skey->sk_func.fn_collation;
skey->sk_func = so->giststate->distanceFn[skey->sk_attno - 1];
skey->sk_func.fn_collation = collation;
/* Check we actually have a distance function ... */
if (!OidIsValid(skey->sk_func.fn_oid))