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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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9
mysql-test/suite/innodb/r/instant_alter_debug.result
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@ -36,14 +36,7 @@ SELECT COUNT(*)>0 FROM INFORMATION_SCHEMA.COLUMNS
LEFT JOIN t4 ON (NUMERIC_SCALE = pk);
COUNT(*)>0
1
SET DEBUG_SYNC='innodb_inplace_alter_table_enter SIGNAL enter WAIT_FOR delete';
ALTER TABLE t4 ADD COLUMN c INT;
connect dml,localhost,root,,;
SET DEBUG_SYNC='now WAIT_FOR enter';
DELETE FROM t4;
InnoDB 0 transactions not purged
SET DEBUG_SYNC='now SIGNAL delete';
connection default;
CREATE TABLE t5 (i INT, KEY(i)) ENGINE=InnoDB;
INSERT INTO t5 VALUES (-42);
ALTER TABLE t5 ADD UNIQUE ui(i);
@ -61,7 +54,7 @@ INSERT INTO t8 VALUES (NULL);
ALTER TABLE t8 ADD c CHAR(3);
SET DEBUG_SYNC='row_log_table_apply1_before SIGNAL rebuilt WAIT_FOR dml';
ALTER TABLE t8 FORCE;
connection dml;
connect dml,localhost,root,,;
SET DEBUG_SYNC='now WAIT_FOR rebuilt';
BEGIN;
INSERT INTO t8 SET i=1;