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Diffstat (limited to 'doc/src/sgml/gist.sgml')
| -rw-r--r-- | doc/src/sgml/gist.sgml | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/doc/src/sgml/gist.sgml b/doc/src/sgml/gist.sgml index 5757ce80025..65084842d49 100644 --- a/doc/src/sgml/gist.sgml +++ b/doc/src/sgml/gist.sgml @@ -374,6 +374,8 @@ my_decompress(PG_FUNCTION_ARGS) Returns a value indicating the <quote>cost</quote> of inserting the new entry into a particular branch of the tree. Items will be inserted down the path of least <function>penalty</function> in the tree. + Values returned by <function>penalty</function> should be non-negative. + If a negative value is returned, it will be treated as zero. </para> <para> |