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# A field which is marked NOT NULL has no DEFAULT value should create an
# error.
CREATE TABLE t1 (A SERIAL);
INSERT INTO t1 VALUES (), (), ();
SELECT A from t1 ORDER BY A;
--error ER_INVALID_ALTER_TABLE_FOR_NOT_NULL
ALTER TABLE t1 ADD COLUMN b INT NOT NULL;
SELECT A from t1 ORDER BY A;
SHOW CREATE TABLE t1;
ALTER TABLE t1 ADD COLUMN b INT DEFAULT 1 NOT NULL;
SELECT A,B from t1 ORDER BY A;
DROP TABLE t1;
CREATE TABLE t1 (A SERIAL, b int);
INSERT INTO t1 VALUES (), (), ();
SELECT A,B from t1 ORDER BY A;
--error ER_WARN_DATA_TRUNCATED
ALTER TABLE t1 MODIFY COLUMN b int not null;
SELECT A,B from t1 ORDER BY A;
SHOW CREATE TABLE t1;
ALTER TABLE t1 MODIFY COLUMN b int DEFAULT 42 NOT NULL;
SELECT A,B from t1 ORDER BY A;
DROP TABLE t1;
CREATE TABLE t1 (col6 int not null);
INSERT INTO t1 VALUES (2);
SELECT * FROM t1;
alter table t1 modify column col6 int not null;
select * from t1;
drop table t1;
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