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include/master-slave.inc
Warnings:
Note #### Sending passwords in plain text without SSL/TLS is extremely insecure.
Note #### Storing MySQL user name or password information in the connection metadata repository is not secure and is therefore not recommended. Please consider using the USER and PASSWORD connection options for START REPLICA; see the 'START REPLICA Syntax' in the MySQL Manual for more information.
[connection master]
# Create a table with an index
CREATE TABLE t1 ( i INT , KEY (i));
INSERT INTO t1 VALUES (2),(3),(5),(7),(11),(13);
ANALYZE TABLE t1;
Table Op Msg_type Msg_text
test.t1 analyze status OK
include/sync_slave_sql_with_master.inc
[Connection Slave]
# Check that the index is on the slave
SHOW INDEXES FROM t1;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment Visible Expression
t1 1 i 1 i A 6 NULL NULL YES BTREE YES NULL
[Connection Master]
# Make the index invisible
ALTER TABLE t1 ALTER INDEX i INVISIBLE;
ANALYZE TABLE t1;
Table Op Msg_type Msg_text
test.t1 analyze status OK
include/sync_slave_sql_with_master.inc
[Connection Slave]
# Verify that the index is invisible on the slave
SHOW INDEXES FROM t1;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment Visible Expression
t1 1 i 1 i A 6 NULL NULL YES BTREE NO NULL
EXPLAIN SELECT * FROM t1 WHERE i=3;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 6 16.67 Using where
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`i` AS `i` from `test`.`t1` where (`test`.`t1`.`i` = 3)
[Connection Master]
ALTER TABLE t1 ALTER INDEX i VISIBLE;
ANALYZE TABLE t1;
Table Op Msg_type Msg_text
test.t1 analyze status OK
include/sync_slave_sql_with_master.inc
[Connection Slave]
# Verify that the index is visible on the slave
SHOW INDEXES FROM t1;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment Visible Expression
t1 1 i 1 i A 6 NULL NULL YES BTREE YES NULL
EXPLAIN SELECT * FROM t1 WHERE i=3;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ref i i 5 const 1 100.00 Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`i` AS `i` from `test`.`t1` where (`test`.`t1`.`i` = 3)
[Connection Master]
# Create an invisible index on the table
CREATE UNIQUE INDEX idx ON t1(i) INVISIBLE;
include/sync_slave_sql_with_master.inc
[Connection Slave]
# Verify that the invisible is created on the slave
SHOW INDEXES FROM t1;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment Visible Expression
t1 0 idx 1 i A 6 NULL NULL YES BTREE NO NULL
t1 1 i 1 i A 6 NULL NULL YES BTREE YES NULL
[Connection Master]
ALTER TABLE t1 DROP INDEX i, ALTER INDEX idx VISIBLE, ALTER INDEX idx INVISIBLE, ALTER INDEX idx VISIBLE;
ANALYZE TABLE t1;
Table Op Msg_type Msg_text
test.t1 analyze status OK
include/sync_slave_sql_with_master.inc
[Connection Slave]
SHOW INDEXES FROM t1;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment Visible Expression
t1 0 idx 1 i A 6 NULL NULL YES BTREE YES NULL
[Connection Master]
# Alter the engine
ALTER TABLE t1 ALTER INDEX idx INVISIBLE, ALTER INDEX idx VISIBLE;
ANALYZE TABLE t1;
Table Op Msg_type Msg_text
test.t1 analyze status OK
include/sync_slave_sql_with_master.inc
[Connection Slave]
SHOW INDEXES FROM t1;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment Visible Expression
t1 0 idx 1 i A 6 NULL NULL YES BTREE YES NULL
[Connection Master]
# Clean up
DROP TABLE t1;
include/sync_slave_sql_with_master.inc
[Connection Slave]
SELECT * FROM t1;
ERROR 42S02: Table 'test.t1' doesn't exist
include/rpl_end.inc
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