[DOCS] Document support for the SQL QUALIFY clause

mihaibudiu · mihaibudiu · commit 03bc6b965def · 2026-02-03T18:10:18.000Z
diff --git a/docs.feldera.com/docs/sql/grammar.md b/docs.feldera.com/docs/sql/grammar.md
@@ -352,6 +352,7 @@ select
       [ WHERE booleanExpression ]
       [ GROUP BY [ ALL | DISTINCT ] { groupItem [, groupItem ]* } ]
       [ HAVING booleanExpression ]
+      [ QUALIFY booleanExpression ]
 ```
 
 <a id="lateral"></a>
@@ -586,6 +587,9 @@ Currently we require window ranges to have constant values.  This
 precludes ranges such as `INTERVAL 1 YEAR`, which have variable sizes.
 The window bounds must be non-negative constant values.
 
+The `QUALIFY` clause is applicable only to window aggregates, and it
+filters the result produced by the window aggregate.
+
 ## Table functions
 
 Table functions are invoked using the syntax `TABLE(function(arguments))`.
