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Fix UNION/INTERSECT/EXCEPT so that when two inputs being merged have

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same data type and same typmod, we show that typmod as the output
typmod, rather than generic -1.  This responds to several complaints
over the past few years about UNIONs unexpectedly dropping length or
precision info.
This commit is contained in:
Tom Lane
2006-08-10 02:36:29 +00:00
parent e860e746e1
commit 0ee26100b6
11 changed files with 79 additions and 35 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 1.279 2006/08/02 01:59:45 joe Exp $
* $PostgreSQL: pgsql/src/backend/nodes/equalfuncs.c,v 1.280 2006/08/10 02:36:28 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -743,6 +743,7 @@ _equalSetOperationStmt(SetOperationStmt *a, SetOperationStmt *b)
COMPARE_NODE_FIELD(larg);
COMPARE_NODE_FIELD(rarg);
COMPARE_NODE_FIELD(colTypes);
COMPARE_NODE_FIELD(colTypmods);
return true;
}