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Added test for ALTERing Nullable columns [#CLICKHOUSE-4].

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This commit is contained in:
Alexey Milovidov 2017-04-23 10:27:31 +03:00
parent f32862be60
commit 69d7432f31
2 changed files with 28 additions and 0 deletions
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12
dbms/tests/queries/0_stateless/00456_alter_nullable.reference Normal file
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Hello
World
Hello
World
\N
Hello
World
xyz
\N
Hello
World
xyz\0\0

16
dbms/tests/queries/0_stateless/00456_alter_nullable.sql Normal file
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DROP TABLE IF EXISTS test.nullable_alter;
CREATE TABLE test.nullable_alter (d Date DEFAULT '2000-01-01', x String) ENGINE = MergeTree(d, d, 1);
INSERT INTO test.nullable_alter (x) VALUES ('Hello'), ('World');
SELECT x FROM test.nullable_alter ORDER BY x;
ALTER TABLE test.nullable_alter MODIFY COLUMN x Nullable(String);
SELECT x FROM test.nullable_alter ORDER BY x;
INSERT INTO test.nullable_alter (x) VALUES ('xyz'), (NULL);
SELECT x FROM test.nullable_alter ORDER BY x NULLS FIRST;
ALTER TABLE test.nullable_alter MODIFY COLUMN x Nullable(FixedString(5));
SELECT x FROM test.nullable_alter ORDER BY x NULLS FIRST;
DROP TABLE test.nullable_alter;