diff options
Diffstat (limited to 'doc/src')
| -rw-r--r-- | doc/src/sgml/perform.sgml | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/doc/src/sgml/perform.sgml b/doc/src/sgml/perform.sgml index 0f61b0995d3..ab090441cfe 100644 --- a/doc/src/sgml/perform.sgml +++ b/doc/src/sgml/perform.sgml @@ -1203,7 +1203,8 @@ SELECT stxname, stxkeys, stxddependencies <para> Functional dependencies are currently only applied when considering - simple equality conditions that compare columns to constant values. + simple equality conditions that compare columns to constant values, + and <literal>IN</literal> clauses with constant values. They are not used to improve estimates for equality conditions comparing two columns or comparing a column to an expression, nor for range clauses, <literal>LIKE</literal> or any other type of condition. |