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MDEV-13301 Optimize DROP INDEX, ADD INDEX into RENAME INDEX

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Just rename index in data dictionary and in InnoDB cache when it's possible.
Introduce ALTER_INDEX_RENAME for that purpose so that engines can optimize
such operation.

Unused code between macro MYSQL_RENAME_INDEX was removed.

compare_keys_but_name(): compare index definitions except for index names

Alter_inplace_info::rename_keys:
ha_innobase_inplace_ctx::rename_keys: vector of rename indexes

fill_alter_inplace_info():: fills Alter_inplace_info::rename_keys
This commit is contained in:
Eugene Kosov
2019-03-14 17:28:20 +03:00
committed by Sergei Golubchik
parent 5d8ca98997
commit 3a3d5ba235
13 changed files with 820 additions and 170 deletions
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4
mysql-test/suite/innodb/r/innodb-index-online.result
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@ -236,8 +236,7 @@ WHERE variable_name = 'innodb_encryption_n_rowlog_blocks_encrypted');
connection con1;
SET DEBUG_SYNC = 'row_log_apply_before SIGNAL c2e_created WAIT_FOR dml2_done';
SET lock_wait_timeout = 10;
ALTER TABLE t1 DROP INDEX c2d, ADD INDEX c2e(c2),
ALGORITHM = INPLACE;
ALTER TABLE t1 CHANGE c2 c22 INT, DROP INDEX c2d, ADD INDEX c2e(c22, c3(10)), ALGORITHM = NOCOPY;
connection default;
INSERT INTO t1 SELECT 80 + c1, c2, c3 FROM t1;
INSERT INTO t1 SELECT 160 + c1, c2, c3 FROM t1;
@ -295,6 +294,7 @@ INNER JOIN INFORMATION_SCHEMA.INNODB_SYS_FIELDS sf
ON si.index_id = sf.index_id WHERE si.name = '?c2e';
name pos
c2 0
c3 1
SET @merge_encrypt_1=
(SELECT variable_value FROM information_schema.global_status
WHERE variable_name = 'innodb_encryption_n_merge_blocks_encrypted');