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
COPY
# 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);
affected rows: 1
info: Records: 1  Duplicates: 0  Warnings: 0
# Make existing column NULLABLE
ALTER TABLE t1 MODIFY f2 INT;
affected rows: 1
info: Records: 1  Duplicates: 0  Warnings: 0
# Make existing column NON-NULLABLE
ALTER TABLE t1 MODIFY f3 INT NOT NULL;
affected rows: 1
info: Records: 1  Duplicates: 0  Warnings: 0
# Drop Stored Column
ALTER TABLE t1 DROP COLUMN f5;
affected rows: 1
info: Records: 1  Duplicates: 0  Warnings: 0
# Add base non-generated column as a last column in the compressed table
ALTER TABLE t1 ADD COLUMN f6 INT NOT NULL;
affected rows: 1
info: Records: 1  Duplicates: 0  Warnings: 0
# Add base non-generated column but not in the last position
ALTER TABLE t1 ADD COLUMN f7 INT NOT NULL after f3;
affected rows: 1
info: Records: 1  Duplicates: 0  Warnings: 0
# Force the table to rebuild
ALTER TABLE t1 FORCE;
affected rows: 1
info: Records: 1  Duplicates: 0  Warnings: 0
# Row format changes
ALTER TABLE t1 ROW_FORMAT=COMPRESSED;
affected rows: 1
info: Records: 1  Duplicates: 0  Warnings: 0
# Engine table
ALTER TABLE t1 ENGINE=INNODB;
affected rows: 1
info: Records: 1  Duplicates: 0  Warnings: 0
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
COPY
ALTER TABLE t1 ADD INDEX idx1(f4), page_compressed=1;
affected rows: 1
info: Records: 1  Duplicates: 0  Warnings: 0
ALTER TABLE t1 DROP INDEX idx, page_compression_level=5;
affected rows: 1
info: Records: 1  Duplicates: 0  Warnings: 0
ALTER TABLE t1 ADD UNIQUE INDEX u1(f2);
affected rows: 1
info: Records: 1  Duplicates: 0  Warnings: 0
ALTER TABLE t1 DROP INDEX f4, page_compression_level=9;
affected rows: 1
info: Records: 1  Duplicates: 0  Warnings: 0
SET foreign_key_checks = 0;
affected rows: 0
ALTER TABLE t1 ADD FOREIGN KEY(f5) REFERENCES t2(f1);
affected rows: 1
info: Records: 1  Duplicates: 0  Warnings: 0
DROP TABLE t2, t1;
affected rows: 0