diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml index fab7cc4b0d..07d1a879b3 100644 --- a/doc/src/sgml/config.sgml +++ b/doc/src/sgml/config.sgml @@ -1,4 +1,4 @@ - + Server Configuration @@ -2140,13 +2140,7 @@ SELECT * FROM parent WHERE key = 2400; Currently, constraint_exclusion is disabled by - default because it risks incorrect results if query plans are - cached — if a table constraint is changed or dropped, - the previously generated plan might now be wrong, and there is - no built-in mechanism to force re-planning. (This deficiency - will probably be addressed in a future - PostgreSQL release.) Another reason for - keeping it off is that the constraint checks are relatively + default because the constraint checks are relatively expensive, and in many circumstances will yield no savings. It is recommended to turn this on only if you are actually using partitioned tables designed to take advantage of the