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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/readfuncs.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/nodes/readfuncs.c,v 1.195 2006/08/12 02:52:04 tgl Exp $
* $PostgreSQL: pgsql/src/backend/nodes/readfuncs.c,v 1.196 2006/12/10 22:13:26 tgl Exp $
*
* NOTES
* Path and Plan nodes do not have any readfuncs support, because we
@ -337,6 +337,7 @@ _readParam(void)
READ_ENUM_FIELD(paramkind, ParamKind);
READ_INT_FIELD(paramid);
READ_OID_FIELD(paramtype);
READ_INT_FIELD(paramtypmod);
READ_DONE();
}