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Repair for bug #691 --- CREATE TABLE AS column aliases fail to be

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applied when the select is a UNION (or other set-operation).

An alternative route to a fix would be to leave analyze.c alone and
change plan_set_operations in prepunion.c to take column names from
the topmost targetlist.  But I am not sure that would work in all
cases.  This patch seems the minimum-risk fix.
This commit is contained in:
Tom Lane 2002-06-13 02:04:46 +00:00
parent 2ed878d31d
commit 59c325bb73
1 changed files with 9 additions and 1 deletions
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10
src/backend/parser/analyze.c
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@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Header: /cvsroot/pgsql/src/backend/parser/analyze.c,v 1.235 2002/05/28 22:15:42 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/analyze.c,v 1.236 2002/06/13 02:04:46 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -2212,8 +2212,16 @@ transformSetOperationStmt(ParseState *pstate, SelectStmt *stmt)
qry->isBinary = FALSE;
}
/*
* Any column names from CREATE TABLE AS need to be attached to both the
* top level and the leftmost subquery. We do not do this earlier
* because we do *not* want the targetnames list to be affected.
*/
if (intoColNames)
{
applyColumnNames(qry->targetList, intoColNames);
applyColumnNames(leftmostQuery->targetList, intoColNames);
}
/*
* As a first step towards supporting sort clauses that are