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# name: test/sql/update/test_string_update_rollback_null.test
# description: Test rollback of string update with NULL
# group: [update]
statement ok
SET default_null_order='nulls_first';
# create a table
statement ok con1
CREATE TABLE test (a VARCHAR);
statement ok con1
INSERT INTO test VALUES ('test'), ('world')
# test rollback of value -> NULL update
statement ok con1
BEGIN TRANSACTION;
statement ok con1
UPDATE test SET a=NULL WHERE a='world';
query T con1
SELECT * FROM test ORDER BY a
----
NULL
test
query T con2
SELECT * FROM test ORDER BY a
----
test
world
statement ok con1
ROLLBACK;
query T con1
SELECT * FROM test ORDER BY a
----
test
world
query T con2
SELECT * FROM test ORDER BY a
----
test
world
# test rollback of NULL -> value update
statement ok con1
UPDATE test SET a=NULL WHERE a='world';
query T con1
SELECT * FROM test ORDER BY a
----
NULL
test
statement ok con1
BEGIN TRANSACTION;
statement ok con1
UPDATE test SET a='world' WHERE a IS NULL;
query T con1
SELECT * FROM test ORDER BY a
----
test
world
query T con2
SELECT * FROM test ORDER BY a
----
NULL
test
statement ok con1
ROLLBACK;
query T con1
SELECT * FROM test ORDER BY a
----
NULL
test
query T con2
SELECT * FROM test ORDER BY a
----
NULL
test
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