should be it

external/duckdb/test/sql/function/autocomplete/window.test

@@ -0,0 +1,57 @@
+# name: test/sql/function/autocomplete/window.test
+# description: Test sql_auto_complete
+# group: [autocomplete]
+
+require autocomplete
+
+# literal
+query II
+FROM sql_auto_complete('SELECT row_number() OVER (RANG') LIMIT 1;
+----
+RANGE 	26
+
+query II
+FROM sql_auto_complete('SELECT row_number() OVER (RANGE BETWE') LIMIT 1;
+----
+BETWEEN 	32
+
+query II
+FROM sql_auto_complete('SELECT row_number() OVER (RANGE BETWEEN UNBOU') LIMIT 1;
+----
+UNBOUNDED 	40
+
+query II
+FROM sql_auto_complete('SELECT row_number() OVER (RANGE BETWEEN UNBOUNDED PREC') LIMIT 1;
+----
+PRECEDING 	50
+
+query II
+FROM sql_auto_complete('SELECT row_number() OVER (RANGE BETWEEN CURRENT ROW AND 5 PREC') LIMIT 1;
+----
+PRECEDING 	58
+
+query II
+FROM sql_auto_complete('SELECT row_number() OVER (PART') LIMIT 1;
+----
+PARTITION 	26
+
+query II
+FROM sql_auto_complete('SELECT lag(col1) OVER (PARTITION BY col1, col2 ORD') LIMIT 1;
+----
+ORDER 	47
+
+query II
+FROM sql_auto_complete('SELECT sum(42) OVER (PARTITION BY col1, col2 ORDER BY col3 ROW') LIMIT 1;
+----
+ROWS 	59
+
+# window clause
+query II
+FROM sql_auto_complete('SELECT lead(l_orderkey) OVER win FR') LIMIT 1;
+----
+FROM 	33
+
+query II
+FROM sql_auto_complete('SELECT lead(l_orderkey) OVER (win) FROM tbl WINDOW win AS (PART') LIMIT 1;
+----
+PARTITION 	59