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| -rw-r--r-- | doc/src/sgml/maintenance.sgml | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/doc/src/sgml/maintenance.sgml b/doc/src/sgml/maintenance.sgml index ee6113926ac..de7fd75e1c6 100644 --- a/doc/src/sgml/maintenance.sgml +++ b/doc/src/sgml/maintenance.sgml @@ -330,7 +330,8 @@ <para> Also, by default there is limited information available about - the selectivity of functions. However, if you create an expression + the selectivity of functions. However, if you create a statistics + object or an expression index that uses a function call, useful statistics will be gathered about the function, which can greatly improve query plans that use the expression index. |