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1 | 1 | <!-- |
2 | | -$Header: /cvsroot/pgsql/doc/src/sgml/runtime.sgml,v 1.89 2001/10/09 18:46:00 petere Exp $ |
| 2 | +$Header: /cvsroot/pgsql/doc/src/sgml/runtime.sgml,v 1.90 2001/10/11 21:16:26 momjian Exp $ |
3 | 3 | --> |
4 | 4 |
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5 | 5 | <Chapter Id="runtime"> |
@@ -719,7 +719,9 @@ env PGOPTIONS='-c geqo=off' psql |
719 | 719 | this many FROM items involved. (Note that a JOIN construct |
720 | 720 | counts as only one FROM item.) The default is 11. For simpler |
721 | 721 | queries it is usually best to use the |
722 | | - deterministic, exhaustive planner. |
| 722 | + deterministic, exhaustive planner. This parameter also controls |
| 723 | + how hard the optimizer will try to merge subquery |
| 724 | + <literal>FROM</literal> clauses into the upper query. |
723 | 725 | </para> |
724 | 726 | </listitem> |
725 | 727 | </varlistentry> |
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