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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/parser/parse_expr.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/parser/parse_expr.c,v 1.234 2008/09/01 20:42:44 tgl Exp $
* $PostgreSQL: pgsql/src/backend/parser/parse_expr.c,v 1.235 2008/10/06 17:39:26 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -1534,6 +1534,7 @@ transformRowExpr(ParseState *pstate, RowExpr *r)
/* Barring later casting, we consider the type RECORD */
newr->row_typeid = RECORDOID;
newr->row_format = COERCE_IMPLICIT_CAST;
newr->colnames = NIL; /* ROW() has anonymous columns */
newr->location = r->location;
return (Node *) newr;