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Major optimizer improvement for joining a large number of tables.

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This commit is contained in:
Bruce Momjian
1999-02-09 03:51:42 +00:00
parent be948af2e8
commit fe35ffe7e0
21 changed files with 277 additions and 139 deletions
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9
src/backend/optimizer/plan/createplan.c
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@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/plan/createplan.c,v 1.38 1999/02/08 04:29:17 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/plan/createplan.c,v 1.39 1999/02/09 03:51:21 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -529,14 +529,14 @@ create_mergejoin_node(MergePath *best_path,
outer_tlist,
inner_tlist));
opcode = get_opcode((best_path->jpath.path.path_order.ord.merge)->join_operator);
opcode = get_opcode((best_path->jpath.path.path_order->ord.merge)->join_operator);
outer_order = (Oid *) palloc(sizeof(Oid) * 2);
outer_order[0] = (best_path->jpath.path.path_order.ord.merge)->left_operator;
outer_order[0] = (best_path->jpath.path.path_order->ord.merge)->left_operator;
outer_order[1] = 0;
inner_order = (Oid *) palloc(sizeof(Oid) * 2);
inner_order[0] = (best_path->jpath.path.path_order.ord.merge)->right_operator;
inner_order[0] = (best_path->jpath.path.path_order->ord.merge)->right_operator;
inner_order[1] = 0;
/*
@ -825,7 +825,6 @@ set_temp_tlist_operators(List *tlist, List *pathkeys, Oid *operators)
resdom = tlist_member((Var *) keys, tlist);
if (resdom)
{
/*
* Order the resdom keys and replace the operator OID for each
* key with the regproc OID.