# name: test/sql/merge/merge_into_subquery.test
# description: Test MERGE INTO with subqueries
# group: [merge]

statement ok
PRAGMA enable_verification

statement ok
CREATE TABLE Totals(item_id int, balance int);

statement ok
CREATE TABLE Buy(item_id int, volume int);

statement ok
INSERT INTO Buy values(10, 1000), (30, 300), (20, 2000);

query I
MERGE INTO Totals USING (VALUES (10), (30)) Updates(item_id) ON Totals.item_id = Updates.item_id
WHEN MATCHED THEN UPDATE SET balance = (SELECT SUM(volume) FROM Buy WHERE item_id=Totals.item_id)
WHEN NOT MATCHED THEN INSERT VALUES (Updates.item_id, (SELECT SUM(volume) FROM Buy WHERE item_id=Updates.item_id));
----
2

query II
FROM Totals ORDER BY ALL
----
10	1000
30	300

statement ok
INSERT INTO Buy values(10, 2000)

query I
MERGE INTO Totals USING (VALUES (10), (20)) Updates(item_id) ON Totals.item_id = Updates.item_id
WHEN MATCHED THEN UPDATE SET balance = (SELECT SUM(volume) FROM Buy WHERE item_id=Totals.item_id)
WHEN NOT MATCHED THEN INSERT VALUES (Updates.item_id, (SELECT SUM(volume) FROM Buy WHERE item_id=Updates.item_id));
----
2

query II
FROM Totals ORDER BY ALL
----
10	3000
20	2000
30	300