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Implementation of UNIONs.

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This commit is contained in:
Bruce Momjian
1997-12-24 06:06:58 +00:00
parent 18adbd9aed
commit 6231e161c9
7 changed files with 95 additions and 91 deletions
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15
src/backend/nodes/copyfuncs.c
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@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/nodes/copyfuncs.c,v 1.25 1997/12/23 21:49:03 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/nodes/copyfuncs.c,v 1.26 1997/12/24 06:05:52 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -1566,7 +1566,18 @@ _copyQuery(Query *from)
}
else
newnode->qry_aggs = NULL;
if (from->unionClause)
{
List *ulist, *temp_list = NIL;
foreach(ulist, from->unionClause)
temp_list = lappend(temp_list,copyObject(lfirst(ulist)));
newnode->unionClause = temp_list;
}
else
newnode->unionClause = NULL;
return newnode;
}