beliefer commented on a change in pull request #35079:
URL: https://github.com/apache/spark/pull/35079#discussion_r778049940



##########
File path: docs/sql-ref-syntax-qry-select-window.md
##########
@@ -39,17 +39,21 @@ window_function OVER
     * Ranking Functions
 
       **Syntax:** `RANK | DENSE_RANK | PERCENT_RANK | NTILE | ROW_NUMBER`
+      
+      Note: Cannot append `[ { IGNORE | RESPECT } NULLS ]`
 
     * Analytic Functions
 
-      **Syntax:** `CUME_DIST | LAG | LEAD`
+      **Syntax:** `[ CUME_DIST | [ LAG | LEAD | NTH_VALUE | FIRST_VALUE | 
LAST_VALUE ] [ { IGNORE | RESPECT } NULLS ] ]`
 
     * Aggregate Functions
 
       **Syntax:** `MAX | MIN | COUNT | SUM | AVG | ...`
 
       Please refer to the [Built-in Aggregation 
Functions](sql-ref-functions-builtin.html#aggregate-functions) document for a 
complete list of Spark aggregate functions.
 
+      Note: Cannot append `[ { IGNORE | RESPECT } NULLS ]`
+
 * **window_frame**

Review comment:
       OK




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