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88aaf590ac
NULL values when there is no DEFAULT Copy and inplace algorithm works similarly for NULL to NOT NULL conversion for the following cases: (1) strict sql mode - Should give error. (2) non-strict sql mode - Should give warnings alone (3) alter ignore table command. - Should give warnings alone.
122 lines
4.1 KiB
Plaintext
122 lines
4.1 KiB
Plaintext
CREATE TABLE t1 (i1 INT UNSIGNED NULL DEFAULT 42) ENGINE=innodb;
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INSERT INTO t1 VALUES(NULL);
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ALTER TABLE t1 CHANGE i1 i1 INT UNSIGNED NOT NULL DEFAULT rand(),
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ALGORITHM=INPLACE;
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ERROR 01000: Data truncated for column 'i1' at row 1
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ALTER TABLE t1 CHANGE i1 i1 INT UNSIGNED NOT NULL DEFAULT rand(),
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ALGORITHM=COPY;
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ERROR 01000: Data truncated for column 'i1' at row 1
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ALTER TABLE t1 CHANGE i1 id INT UNSIGNED NOT NULL AUTO_INCREMENT,
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ADD PRIMARY KEY(id), ALGORITHM=INPLACE;
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ERROR 0A000: ALGORITHM=INPLACE is not supported. Reason: Cannot change column type INPLACE. Try ALGORITHM=COPY
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ALTER IGNORE TABLE t1 ADD PRIMARY KEY(i1), ALGORITHM=INPLACE;
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affected rows: 0
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info: Records: 0 Duplicates: 0 Warnings: 1
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Warnings:
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Warning 1265 Data truncated for column 'i1' at row 1
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ALTER TABLE t1 CHANGE i1 id INT UNSIGNED NOT NULL AUTO_INCREMENT;
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affected rows: 1
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info: Records: 1 Duplicates: 0 Warnings: 0
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SELECT * FROM t1;
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id
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42
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SHOW CREATE TABLE t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
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PRIMARY KEY (`id`)
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) ENGINE=InnoDB AUTO_INCREMENT=43 DEFAULT CHARSET=latin1
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DROP TABLE t1;
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CREATE TABLE t1 (i1 INT UNSIGNED NOT NULL, d1 TIMESTAMP NULL) ENGINE=InnoDB;
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SHOW CREATE TABLE t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`i1` int(10) unsigned NOT NULL,
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`d1` timestamp NULL DEFAULT NULL
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) ENGINE=InnoDB DEFAULT CHARSET=latin1
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INSERT INTO t1 (i1) VALUES (1), (2), (3), (4), (5);
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select * from t1;
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i1 d1
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1 NULL
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2 NULL
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3 NULL
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4 NULL
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5 NULL
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set sql_mode = 'STRICT_ALL_TABLES,NO_ZERO_DATE';
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ALTER TABLE t1 CHANGE d1 d1 TIMESTAMP NULL DEFAULT '2017-05-08 16:23:45',
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ALGORITHM=INPLACE;
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SELECT DISTINCT d1 FROM t1;
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d1
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NULL
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ALTER TABLE t1 CHANGE d1 d1 TIMESTAMP NULL DEFAULT '2017-05-08 16:32:45',
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ALGORITHM=COPY;
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SELECT DISTINCT d1 FROM t1;
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d1
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NULL
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ALTER TABLE t1 CHANGE d1 d1 TIMESTAMP DEFAULT '2017-05-08 16:32:54';
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affected rows: 5
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info: Records: 5 Duplicates: 0 Warnings: 0
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# Note: NULL was changed to CURRENT_TIMESTAMP(),
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# not the specified constant DEFAULT value!
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SELECT COUNT(DISTINCT d1),COUNT(d1),COUNT(*) FROM t1;
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COUNT(DISTINCT d1) COUNT(d1) COUNT(*)
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1 5 5
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SELECT DISTINCT (CURRENT_TIMESTAMP()-d1) <= 60 FROM t1;
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(CURRENT_TIMESTAMP()-d1) <= 60
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1
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drop table t1;
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CREATE TABLE t1 (
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`i1` INT(10) UNSIGNED NOT NULL,
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`d1` TIMESTAMP NULL DEFAULT NULL
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) ENGINE=innodb;
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INSERT INTO t1 (i1) VALUES (1), (2), (3), (4), (5);
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ALTER TABLE t1 CHANGE d1 d1 TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP;
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affected rows: 5
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info: Records: 5 Duplicates: 0 Warnings: 0
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ALTER TABLE t1 ADD COLUMN w1 varchar(20) NULL DEFAULT USER();
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affected rows: 0
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info: Records: 0 Duplicates: 0 Warnings: 0
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ALTER TABLE t1 CHANGE w1 u1 varchar(30) NULL DEFAULT substr(USER(),1);
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affected rows: 0
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info: Records: 0 Duplicates: 0 Warnings: 0
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SELECT u1, COUNT(DISTINCT d1) FROM t1 GROUP BY u1;
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u1 COUNT(DISTINCT d1)
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root@localhost 1
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ALTER TABLE t1 ADD COLUMN d2 TIMESTAMP DEFAULT '2017-05-08 16:23:45',
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LOCK=NONE;
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affected rows: 0
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info: Records: 0 Duplicates: 0 Warnings: 0
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ALTER TABLE t1 ADD COLUMN d3 TIMESTAMP DEFAULT d1, LOCK=NONE;
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ERROR 0A000: LOCK=NONE is not supported for this operation. Try LOCK=SHARED
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ALTER TABLE t1 ADD COLUMN d3 TIMESTAMP DEFAULT d1, ALGORITHM=INPLACE;
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ERROR 0A000: ALGORITHM=INPLACE is not supported for this operation. Try ALGORITHM=COPY
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ALTER TABLE t1 ADD COLUMN d3 TIMESTAMP DEFAULT d1;
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affected rows: 5
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info: Records: 5 Duplicates: 0 Warnings: 0
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SELECT d1-d3, d2 FROM t1;
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d1-d3 d2
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0 2017-05-08 16:23:45
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0 2017-05-08 16:23:45
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0 2017-05-08 16:23:45
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0 2017-05-08 16:23:45
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0 2017-05-08 16:23:45
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SHOW CREATE TABLE t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`i1` int(10) unsigned NOT NULL,
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`d1` timestamp NOT NULL DEFAULT current_timestamp(),
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`u1` varchar(30) DEFAULT substr(user(),1),
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`d2` timestamp NOT NULL DEFAULT '2017-05-08 16:23:45',
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`d3` timestamp NOT NULL DEFAULT `d1`
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) ENGINE=InnoDB DEFAULT CHARSET=latin1
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ALTER TABLE t1 ADD COLUMN d4 TIMESTAMP DEFAULT CURRENT_TIMESTAMP;
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affected rows: 0
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info: Records: 0 Duplicates: 0 Warnings: 0
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SELECT COUNT(DISTINCT d4),COUNT(d4),COUNT(*) FROM t1;
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COUNT(DISTINCT d4) COUNT(d4) COUNT(*)
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1 5 5
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SELECT DISTINCT (CURRENT_TIMESTAMP()-d4) <= 60 FROM t1;
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(CURRENT_TIMESTAMP()-d4) <= 60
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1
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DROP TABLE t1;
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