should be it

external/duckdb/test/sql/attach/attach_lambda_view.test

@@ -0,0 +1,42 @@
+# name: test/sql/attach/attach_lambda_view.test
+# description: Test lambdas in attached databases
+# group: [attach]
+
+foreach i 2 3
+
+statement ok
+ATTACH '__TEST_DIR__/version_1_${i}_0.db' (STORAGE_VERSION 'v1.${i}.0');
+
+statement ok
+CREATE TABLE version_1_${i}_0.lists(l integer[], initial integer);
+
+statement ok
+INSERT INTO version_1_${i}_0.lists VALUES ([1], -1), ([1, 2, 3], -2), (NULL, -3), ([-1, NULL, 2], -3);
+
+statement ok
+CREATE VIEW version_1_${i}_0.reduced_lists AS
+	SELECT list_reduce(l, LAMBDA x, y : x + y, initial) AS r FROM version_1_${i}_0.lists;
+
+query I
+FROM version_1_${i}_0.reduced_lists;
+----
+0
+4
+NULL
+NULL
+
+statement ok
+DETACH version_1_${i}_0
+
+statement ok
+ATTACH '__TEST_DIR__/version_1_${i}_0.db'
+
+query I
+FROM version_1_${i}_0.reduced_lists;
+----
+0
+4
+NULL
+NULL
+
+endloop