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MDEV-13134 Introduce ALTER TABLE attributes ALGORITHM=NOCOPY and ALGORITHM=INSTANT

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Introduced new alter algorithm type called NOCOPY & INSTANT for
inplace alter operation.

NOCOPY - Algorithm refuses any alter operation that would
rebuild the clustered index. It is a subset of INPLACE algorithm.

INSTANT - Algorithm allow any alter operation that would
modify only meta data. It is a subset of NOCOPY algorithm.

Introduce new variable called alter_algorithm. The values are
DEFAULT(0), COPY(1), INPLACE(2), NOCOPY(3), INSTANT(4)

Message to deprecate old_alter_table variable and make it alias
for alter_algorithm variable.

alter_algorithm variable for slave is always set to default.
This commit is contained in:
Thirunarayanan Balathandayuthapani
2018-05-07 14:54:58 +05:30
parent a0bc3b7eee
commit 85cc6b70bd
44 changed files with 1337 additions and 342 deletions
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71
mysql-test/suite/innodb/r/alter_algorithm.result Normal file
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CREATE TABLE t1(f1 INT NOT NULL,
f2 INT NOT NULL,
f3 INT NULL,
f4 INT as (f2) STORED,
f5 INT as (f3) STORED,
PRIMARY KEY(f1))ROW_FORMAT=COMPRESSED, ENGINE=INNODB;
INSERT INTO t1(f1, f2, f3) VALUES(1, 1, 1);
SELECT @@alter_algorithm;
@@alter_algorithm
NOCOPY
# All the following cases needs table rebuild
# Add and Drop primary key
ALTER TABLE t1 ADD COLUMN col1 INT NOT NULL,DROP PRIMARY KEY,ADD PRIMARY KEY(col1);
ERROR 0A000: ALGORITHM=NOCOPY is not supported for this operation. Try ALGORITHM=INPLACE
# Make existing column NULLABLE
ALTER TABLE t1 MODIFY f2 INT;
ERROR 0A000: ALGORITHM=NOCOPY is not supported for this operation. Try ALGORITHM=INPLACE
# Make existing column NON-NULLABLE
ALTER TABLE t1 MODIFY f3 INT NOT NULL;
ERROR 0A000: ALGORITHM=NOCOPY is not supported for this operation. Try ALGORITHM=INPLACE
# Drop Stored Column
ALTER TABLE t1 DROP COLUMN f5;
ERROR 0A000: ALGORITHM=NOCOPY is not supported for this operation. Try ALGORITHM=INPLACE
# Add base non-generated column as a last column in the compressed table
ALTER TABLE t1 ADD COLUMN f6 INT NOT NULL;
ERROR 0A000: ALGORITHM=NOCOPY is not supported for this operation. Try ALGORITHM=INPLACE
# Add base non-generated column but not in the last position
ALTER TABLE t1 ADD COLUMN f7 INT NOT NULL after f3;
ERROR 0A000: ALGORITHM=NOCOPY is not supported for this operation. Try ALGORITHM=INPLACE
# Force the table to rebuild
ALTER TABLE t1 FORCE;
ERROR 0A000: ALGORITHM=NOCOPY is not supported for this operation. Try ALGORITHM=INPLACE
# Row format changes
ALTER TABLE t1 ROW_FORMAT=COMPRESSED;
ERROR 0A000: ALGORITHM=NOCOPY is not supported for this operation. Try ALGORITHM=INPLACE
# Engine table
ALTER TABLE t1 ENGINE=INNODB;
ERROR 0A000: ALGORITHM=NOCOPY is not supported for this operation. Try ALGORITHM=INPLACE
DROP TABLE t1;
affected rows: 0
CREATE TABLE t1(f1 INT PRIMARY KEY, f2 INT NOT NULL,
f3 INT AS (f2 * f2) VIRTUAL,
f4 INT NOT NULL UNIQUE,
f5 INT NOT NULL,
INDEX`idx`(f2))ENGINE=INNODB;
CREATE TABLE t2(f1 INT NOT NULL, f2 INT NOT NULL,
INDEX(f1),
FOREIGN KEY `fidx` (f1) REFERENCES t1(f1))ENGINE=INNODB;
INSERT INTO t1(f1, f2, f4, f5) VALUES(1, 2, 3, 4);
SELECT @@alter_algorithm;
@@alter_algorithm
NOCOPY
ALTER TABLE t1 ADD INDEX idx1(f4);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
ALTER TABLE t1 DROP INDEX idx;
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
ALTER TABLE t1 ADD UNIQUE INDEX u1(f2);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
ALTER TABLE t1 DROP INDEX f4;
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
SET foreign_key_checks = 0;
affected rows: 0
ALTER TABLE t1 ADD FOREIGN KEY(f5) REFERENCES t2(f1);
affected rows: 0
info: Records: 0 Duplicates: 0 Warnings: 0
DROP TABLE t2, t1;
affected rows: 0