diff options
| author | Bruce Momjian <bruce@momjian.us> | 2006-01-20 16:42:02 +0000 |
|---|---|---|
| committer | Bruce Momjian <bruce@momjian.us> | 2006-01-20 16:42:02 +0000 |
| commit | 4a651c97055c700259965f6aa71da68440a48663 (patch) | |
| tree | 61cb09e8bf9a532259c9f28744f89b59328a538b | |
| parent | 517056bd08e6f0b12151d6ee68de56ca7aa2c36a (diff) | |
| download | postgresql-4a651c97055c700259965f6aa71da68440a48663.tar.gz postgresql-4a651c97055c700259965f6aa71da68440a48663.zip | |
Update EXPLAIN wording for GEQO usage.
| -rw-r--r-- | doc/src/sgml/ref/explain.sgml | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/doc/src/sgml/ref/explain.sgml b/doc/src/sgml/ref/explain.sgml index 748e7e16ae2..dd1f07b40df 100644 --- a/doc/src/sgml/ref/explain.sgml +++ b/doc/src/sgml/ref/explain.sgml @@ -1,5 +1,5 @@ <!-- -$PostgreSQL: pgsql/doc/src/sgml/ref/explain.sgml,v 1.35 2005/01/04 00:39:53 tgl Exp $ +$PostgreSQL: pgsql/doc/src/sgml/ref/explain.sgml,v 1.35.6.1 2006/01/20 16:42:02 momjian Exp $ PostgreSQL documentation --> @@ -151,6 +151,14 @@ ROLLBACK; </para> <para> + Genetic query optimization (<acronym>GEQO</acronym>) randomly + tests execution plans. Therefore, when the number of tables exceeds + <varname>geqo_threshold</> causing genetic query optimization to be + used, the execution plan is likely to change each time the statement + is executed. + </para> + + <para> Prior to <productname>PostgreSQL</productname> 7.3, the plan was emitted in the form of a <literal>NOTICE</literal> message. Now it appears as a query result (formatted like a table with a single |