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Allow the planner to collapse explicit inner JOINs together, rather than

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necessarily following the JOIN syntax to develop the query plan.  The old
behavior is still available by setting GUC variable JOIN_COLLAPSE_LIMIT
to 1.  Also create a GUC variable FROM_COLLAPSE_LIMIT to control the
similar decision about when to collapse sub-SELECT lists into their parent
lists.  (This behavior existed already, but the limit was always
GEQO_THRESHOLD/2; now it's separately adjustable.)
This commit is contained in:
Tom Lane
2003-01-25 23:10:30 +00:00
parent 15ab7a8720
commit 9f5f212475
12 changed files with 1035 additions and 873 deletions
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4
src/bin/psql/tab-complete.c
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@@ -3,7 +3,7 @@
*
* Copyright 2000-2002 by PostgreSQL Global Development Group
*
* $Header: /cvsroot/pgsql/src/bin/psql/tab-complete.c,v 1.71 2003/01/10 22:03:30 petere Exp $
* $Header: /cvsroot/pgsql/src/bin/psql/tab-complete.c,v 1.72 2003/01/25 23:10:30 tgl Exp $
*/
/*----------------------------------------------------------------------
@@ -252,6 +252,7 @@ psql_completion(char *text, int start, int end)
"explain_pretty_print",
"extra_float_digits",
"fixbtree",
"from_collapse_limit",
"fsync",
"geqo",
"geqo_effort",
@@ -260,6 +261,7 @@ psql_completion(char *text, int start, int end)
"geqo_random_seed",
"geqo_selection_bias",
"geqo_threshold",
"join_collapse_limit",
"log_hostname",
"krb_server_keyfile",
"lc_messages",