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# name: test/sql/update/null_update_merge_transaction.test
# description: Test repeated updates that change the nullness of values
# group: [update]
# create a table
statement ok
CREATE TABLE test (id INTEGER, a INTEGER);
statement ok
INSERT INTO test VALUES (1, 1), (2, 2), (3, 3), (4, NULL);
query II
SELECT * FROM test ORDER BY id;
----
1 1
2 2
3 3
4 NULL
statement ok
BEGIN TRANSACTION
statement ok
UPDATE test SET a=CASE WHEN a IS NULL THEN 1 ELSE NULL END
query II
SELECT * FROM test ORDER BY id;
----
1 NULL
2 NULL
3 NULL
4 1
statement ok
UPDATE test SET a=2 WHERE id >= 2 AND id <= 3
query II
SELECT * FROM test ORDER BY id;
----
1 NULL
2 2
3 2
4 1
statement ok
UPDATE test SET a=NULL WHERE id >= 3
query II
SELECT * FROM test ORDER BY id;
----
1 NULL
2 2
3 NULL
4 NULL
statement ok
UPDATE test SET a=id WHERE id != 3
query II
SELECT * FROM test ORDER BY id;
----
1 1
2 2
3 NULL
4 4
statement ok
UPDATE test SET a=NULL WHERE id != 3
query II
SELECT * FROM test ORDER BY id;
----
1 NULL
2 NULL
3 NULL
4 NULL
statement ok
UPDATE test SET a=3 WHERE id != 2
query II
SELECT * FROM test ORDER BY id;
----
1 3
2 NULL
3 3
4 3
statement ok
UPDATE test SET a=7 WHERE id != 3
query II
SELECT * FROM test ORDER BY id;
----
1 7
2 7
3 3
4 7
statement ok
UPDATE test SET a=NULL
query II
SELECT * FROM test ORDER BY id;
----
1 NULL
2 NULL
3 NULL
4 NULL
statement ok
COMMIT
query II
SELECT * FROM test ORDER BY id;
----
1 NULL
2 NULL
3 NULL
4 NULL
|
