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Create a standardized expression_tree_mutator support routine
to go along with expression_tree_walker. (_walker is not suitable for routines that need to alter the tree structure significantly.) Other minor cleanups in clauses.c.
1 parent f0b651a commit 6bc601b

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3 files changed

+281
-52
lines changed

3 files changed

+281
-52
lines changed

src/backend/optimizer/prep/preptlist.c

Lines changed: 4 additions & 12 deletions
Original file line numberDiff line numberDiff line change
@@ -7,7 +7,7 @@
77
*
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*
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* IDENTIFICATION
10-
* $Header: /cvsroot/pgsql/src/backend/optimizer/prep/preptlist.c,v 1.27 1999/07/17 20:17:16 momjian Exp $
10+
* $Header: /cvsroot/pgsql/src/backend/optimizer/prep/preptlist.c,v 1.28 1999/08/09 00:51:26 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
@@ -45,10 +45,9 @@ preprocess_targetlist(List *tlist,
4545
Index result_relation,
4646
List *range_table)
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{
48-
List *expanded_tlist = NIL;
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Oid relid = InvalidOid;
50-
List *t_list = NIL;
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List *temp = NIL;
49+
List *expanded_tlist;
50+
List *t_list;
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5352
if (result_relation >= 1 && command_type != CMD_SELECT)
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relid = getrelid(result_relation, range_table);
@@ -61,14 +60,7 @@ preprocess_targetlist(List *tlist,
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expanded_tlist = expand_targetlist(tlist, relid, command_type, result_relation);
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/* XXX should the fix-opids be this early?? */
64-
/* was mapCAR */
65-
foreach(temp, expanded_tlist)
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{
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TargetEntry *tle = lfirst(temp);
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69-
if (tle->expr)
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fix_opid(tle->expr);
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}
63+
fix_opids(expanded_tlist);
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t_list = copyObject(expanded_tlist);
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/* ------------------

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