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enable_constraint_exclusion => constraint_exclusion

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Also improve wording.
This commit is contained in:
Bruce Momjian
2005-08-22 17:35:03 +00:00
parent 8ad3965a11
commit a7f49252d2
8 changed files with 31 additions and 33 deletions
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6
src/backend/optimizer/path/allpaths.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/optimizer/path/allpaths.c,v 1.135 2005/07/23 21:05:46 tgl Exp $
* $PostgreSQL: pgsql/src/backend/optimizer/path/allpaths.c,v 1.136 2005/08/22 17:34:58 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@@ -36,7 +36,7 @@
/* These parameters are set by GUC */
bool enable_constraint_exclusion = false;
bool constraint_exclusion = false;
bool enable_geqo = false; /* just in case GUC doesn't set it */
int geqo_threshold;
@@ -318,7 +318,7 @@ set_inherited_rel_pathlist(PlannerInfo *root, RelOptInfo *rel,
* exclusion, just ignore it. (We have to have converted the
* baserestrictinfo Vars before we can make the test.)
*/
if (enable_constraint_exclusion)
if (constraint_exclusion)
{
List *constraint_pred;

13
src/backend/utils/misc/guc.c
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@@ -10,7 +10,7 @@
* Written by Peter Eisentraut <peter_e@gmx.net>.
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.285 2005/08/21 03:39:34 tgl Exp $
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.286 2005/08/22 17:34:59 momjian Exp $
*
*--------------------------------------------------------------------
*/
@@ -453,13 +453,12 @@ static struct config_bool ConfigureNamesBool[] =
true, NULL, NULL
},
{
{"enable_constraint_exclusion", PGC_USERSET, QUERY_TUNING_OTHER,
gettext_noop("Enables the planner's use of constraints in queries."),
gettext_noop("Constraints will be examined to exclude tables "
"that can be proven not to be required to produce "
"a correct result for the query.")
{"constraint_exclusion", PGC_USERSET, QUERY_TUNING_OTHER,
gettext_noop("Enables the planner to use constraints to limit table access."),
gettext_noop("This prevents table access if the table constraints "
"guarantee that table access is necessary.")
},
&enable_constraint_exclusion,
&constraint_exclusion,
false, NULL, NULL
},
{

2
src/backend/utils/misc/postgresql.conf.sample
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@@ -190,7 +190,7 @@
# - Other Planner Options -
#default_statistics_target = 10 # range 1-1000
#enable_constraint_exclusion = off
#constraint_exclusion = off
#from_collapse_limit = 8
#join_collapse_limit = 8 # 1 disables collapsing of explicit
# JOINs