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When expanding a whole-row Var into a RowExpr during ResolveNew(), attach

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the column alias names of the RTE referenced by the Var to the RowExpr.
This is needed to allow ruleutils.c to correctly deparse FieldSelect nodes
referencing such a construct.  Per my recent bug report.

Adding a field to RowExpr forces initdb (because of stored rules changes)
so this solution is not back-patchable; which is unfortunate because 8.2
and 8.3 have this issue.  But it only affects EXPLAIN for some pretty odd
corner cases, so we can probably live without a solution for the back
branches.
This commit is contained in:
Tom Lane
2008-10-06 17:39:26 +00:00
parent e64bb65aff
commit bf461538e1
13 changed files with 49 additions and 16 deletions
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3
src/backend/nodes/copyfuncs.c
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@@ -15,7 +15,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/nodes/copyfuncs.c,v 1.406 2008/10/04 21:56:53 tgl Exp $
* $PostgreSQL: pgsql/src/backend/nodes/copyfuncs.c,v 1.407 2008/10/06 17:39:25 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -1257,6 +1257,7 @@ _copyRowExpr(RowExpr *from)
COPY_NODE_FIELD(args);
COPY_SCALAR_FIELD(row_typeid);
COPY_SCALAR_FIELD(row_format);
COPY_NODE_FIELD(colnames);
COPY_LOCATION_FIELD(location);
return newnode;