should be it

external/duckdb/test/sql/generated_columns/virtual/null.test

@@ -0,0 +1,32 @@
+# name: test/sql/generated_columns/virtual/null.test
+# description: Test generated columns with the NOT NULL constraint
+# group: [virtual]
+
+statement ok
+PRAGMA enable_verification
+
+# Not supported appended to the column definition
+statement error
+CREATE TABLE unit (
+	price INTEGER,
+	amount_sold AS (price) NOT NULL,
+);
+----
+<REGEX>:.*Binder Error.*not supported yet.*
+
+# Show that proper NOT NULL constraints still work when mixed in when generated columns
+statement ok
+CREATE TABLE tbl (
+	gen1 AS (price),
+	gen2 AS (price),
+	price INTEGER NOT NULL
+);
+
+statement ok
+INSERT INTO tbl VALUES (5);
+
+# Violates not null constraint
+statement error
+INSERT INTO tbl VALUES (null);
+----
+<REGEX>:.*Constraint Error.*constraint failed.*