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Allow float8, int8, and related datatypes to be passed by value on machines

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where Datum is 8 bytes wide.  Since this will break old-style C functions
(those still using version 0 calling convention) that have arguments or
results of these types, provide a configure option to disable it and retain
the old pass-by-reference behavior.  Likewise, provide a configure option
to disable the recently-committed float4 pass-by-value change.

Zoltan Boszormenyi, plus configurability stuff by me.
This commit is contained in:
Tom Lane
2008-04-21 00:26:47 +00:00
parent be939544a6
commit 8472bf7a73
36 changed files with 661 additions and 243 deletions
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6
src/backend/optimizer/plan/planagg.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/optimizer/plan/planagg.c,v 1.37 2008/03/31 16:59:26 tgl Exp $
* $PostgreSQL: pgsql/src/backend/optimizer/plan/planagg.c,v 1.38 2008/04/21 00:26:45 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -514,8 +514,8 @@ make_agg_subplan(PlannerInfo *root, MinMaxAggInfo *info)
/* set up LIMIT 1 */
subparse->limitOffset = NULL;
subparse->limitCount = (Node *) makeConst(INT8OID, -1, sizeof(int64),
Int64GetDatum(1),
false, false /* not by val */ );
Int64GetDatum(1), false,
FLOAT8PASSBYVAL);
/*
* Generate the plan for the subquery. We already have a Path for the