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mariadb/mysql-test/suite/gcol/t/virtual_index_drop.test
Thirunarayanan Balathandayuthapani d270525dfd MDEV-23805 Make Online DDL to Instant DDL when table is empty
- In ha_innobase::prepare_inplace_alter_table(), InnoDB should
check whether the table is empty. If the table is empty then
server should avoid downgrading the MDL after prepare phase.
It is more like instant alter, does change only in dicationary
and metadata.

- Changed few debug test case to make non-empty DDL table
2021-11-12 17:46:35 +05:30

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--source include/have_innodb.inc
--source include/have_debug.inc
--echo #
--echo # MDEV-24971 InnoDB access freed virtual column
--echo # after rollback of secondary index
--echo #
# Exclusive lock must not defer the index removal
CREATE TABLE t1(f1 INT, f2 INT AS (f1 + 2) VIRTUAL)ENGINE=InnoDB;
INSERT INTO t1(f1) VALUES(1), (1);
--error ER_DUP_ENTRY
ALTER TABLE t1 ADD UNIQUE INDEX(f2), ALGORITHM=INPLACE, LOCK=EXCLUSIVE;
SHOW CREATE TABLE t1;
DROP TABLE t1;
# If Shared lock and table doesn't have any other open handle
# then InnoDB must not defer the index removal
CREATE TABLE t1(f1 INT, f2 INT AS (f1 + 2) VIRTUAL)ENGINE=InnoDB;
INSERT INTO t1(f1) VALUES(1), (1);
--error ER_DUP_ENTRY
ALTER TABLE t1 ADD UNIQUE INDEX(f2), ALGORITHM=INPLACE, LOCK=SHARED;
SHOW CREATE TABLE t1;
DROP TABLE t1;
# InnoDB should store the newly dropped virtual column into
# new_vcol_info in index when rollback of alter happens
CREATE TABLE t1(f1 INT, f2 INT AS (f1) VIRTUAL)ENGINE=InnoDB;
INSERT INTO t1(f1) VALUES(1);
SET DEBUG_DBUG="+d,create_index_fail";
SET DEBUG_SYNC="innodb_inplace_alter_table_enter SIGNAL con1_go WAIT_FOR alter_signal";
SEND ALTER TABLE t1 ADD COLUMN f3 INT AS (f1) VIRTUAL, ADD INDEX(f2, f3);
connect(con1,localhost,root,,,);
SET DEBUG_SYNC="now WAIT_FOR con1_go";
BEGIN;
SELECT * FROM t1;
SET DEBUG_SYNC="now SIGNAL alter_signal";
connection default;
--error ER_DUP_ENTRY
reap;
connection con1;
rollback;
connection default;
SHOW CREATE TABLE t1;
DROP TABLE t1;
CREATE TABLE t1(f1 INT, f2 INT AS (f1) VIRTUAL)ENGINE=InnoDB;
INSERT INTO t1(f1) VALUES(1);
SET DEBUG_DBUG="+d,create_index_fail";
SET DEBUG_SYNC="innodb_inplace_alter_table_enter SIGNAL con1_go WAIT_FOR alter_signal";
send ALTER TABLE t1 ADD INDEX(f2);
connection con1;
SET DEBUG_SYNC="now WAIT_FOR con1_go";
BEGIN;
INSERT INTO t1(f1) VALUES(1);
SET DEBUG_SYNC="now SIGNAL alter_signal";
connection default;
--error ER_DUP_ENTRY
reap;
connection con1;
rollback;
connection default;
disconnect con1;
DROP TABLE t1;
CREATE TABLE t1(f1 CHAR(100), f2 CHAR(100) as (f1) VIRTUAL)ENGINE=InnoDB;
--error ER_DUP_FIELDNAME
ALTER TABLE t1 ADD COLUMN f3 CHAR(100) AS (f2) VIRTUAL, ADD INDEX(f3(10), f1, f3(12));
DROP TABLE t1;
SET DEBUG_SYNC=RESET;