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Clarify docs about limitations of constraint exclusion with partitions

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The current wording can confuse the reader about constraint exclusion
being available at query execution, but this only applies to partition
pruning.

Reported-by: Shouyu Luo
Author: David Rowley
Reviewed-by: Chapman Flack, Amit Langote
Discussion: https://postgr.es/m/15629-2ef8b22e61f8333f@postgresql.org
This commit is contained in:
Michael Paquier 2019-02-12 12:01:56 +09:00
parent 74dfe58a59
commit ea05b221c2
1 changed files with 2 additions and 2 deletions
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doc/src/sgml/ddl.sgml
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@ -4511,8 +4511,8 @@ EXPLAIN SELECT count(*) FROM measurement WHERE logdate >= DATE '2008-01-01';
<itemizedlist>
<listitem>
<para>
Constraint exclusion is only applied during query planning; unlike
partition pruning, it cannot be applied during query execution.
Constraint exclusion is only applied during query planning, unlike
partition pruning, which can also be applied during query execution.
</para>
</listitem>