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Add a paramtypmod field to Param nodes. This is dead weight for Params

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representing externally-supplied values, since the APIs that carry such
values only specify type not typmod.  However, for PARAM_SUBLINK Params
it is handy to carry the typmod of the sublink's output column.  This
is a much cleaner solution for the recently reported 'could not find
pathkey item to sort' and 'failed to find unique expression in subplan
tlist' bugs than my original 8.2-compatible patch.  Besides, someday we
might want to support typmods for external parameters ...
This commit is contained in:
Tom Lane
2006-12-10 22:13:27 +00:00
parent 314c7b642b
commit 9fa12ddda6
10 changed files with 50 additions and 47 deletions
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3
src/backend/nodes/equalfuncs.c
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@@ -18,7 +18,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/nodes/equalfuncs.c,v 1.287 2006/11/05 22:42:08 tgl Exp $
* $PostgreSQL: pgsql/src/backend/nodes/equalfuncs.c,v 1.288 2006/12/10 22:13:26 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -147,6 +147,7 @@ _equalParam(Param *a, Param *b)
COMPARE_SCALAR_FIELD(paramkind);
COMPARE_SCALAR_FIELD(paramid);
COMPARE_SCALAR_FIELD(paramtype);
COMPARE_SCALAR_FIELD(paramtypmod);
return true;
}