diff --git a/doc/src/sgml/queries.sgml b/doc/src/sgml/queries.sgml index 372cce1a487..a326960ff4d 100644 --- a/doc/src/sgml/queries.sgml +++ b/doc/src/sgml/queries.sgml @@ -1461,10 +1461,10 @@ GROUP BY GROUPING SETS ( When multiple window functions are used, all the window functions having - syntactically equivalent PARTITION BY and ORDER BY - clauses in their window definitions are guaranteed to be evaluated in a - single pass over the data. Therefore they will see the same sort ordering, - even if the ORDER BY does not uniquely determine an ordering. + equivalent PARTITION BY and ORDER BY + clauses in their window definitions are guaranteed to see the same + ordering of the input rows, even if the ORDER BY does + not uniquely determine the ordering. However, no guarantees are made about the evaluation of functions having different PARTITION BY or ORDER BY specifications. (In such cases a sort step is typically required between the passes of