--echo #
--echo # MDEV-21921 Make transaction_isolation and transaction_read_only into
--echo # system variables
--echo #

SET @saved_global_isolation= @@global.transaction_isolation;
SET @saved_global_read_only= @@global.transaction_read_only;

--echo # Case 1: Check the influence of --transaction_* on
--echo # @@session.transaction_* and @@global.transaction_*,
--echo # @@session.tx_*, @@global.tx_*.

SELECT @@session.transaction_isolation, @@global.transaction_isolation,
       @@session.tx_isolation, @@global.tx_isolation;
SHOW GLOBAL VARIABLES LIKE '%_isolation';
SHOW SESSION VARIABLES LIKE '%_isolation';

SELECT @@session.transaction_read_only, @@global.transaction_read_only,
       @@session.tx_read_only, @@global.tx_read_only;
SHOW GLOBAL VARIABLES LIKE '%_read_only';
SHOW SESSION VARIABLES LIKE '%_read_only';

--echo # Case 2: Check that the change to tx_* is reflected to transaction_*.

SET tx_isolation= 'REPEATABLE-READ';
SET @@global.tx_isolation= 'SERIALIZABLE';
SELECT @@session.tx_isolation, @@global.tx_isolation,
@@session.transaction_isolation, @@global.transaction_isolation;
SHOW GLOBAL VARIABLES LIKE '%_isolation';
SHOW SESSION VARIABLES LIKE '%_isolation';

SET STATEMENT tx_isolation= 'SERIALIZABLE' FOR SHOW SESSION VARIABLES LIKE '%_isolation';
SHOW SESSION VARIABLES LIKE '%_isolation';

SET tx_read_only= OFF;
SET @@global.tx_read_only= ON;
SELECT @@session.tx_read_only, @@global.tx_read_only,
@@session.transaction_read_only, @@global.transaction_read_only;
SHOW GLOBAL VARIABLES LIKE '%_read_only';
SHOW SESSION VARIABLES LIKE '%_read_only';

SET STATEMENT tx_read_only= ON FOR SHOW SESSION VARIABLES LIKE '%_read_only';
SHOW SESSION VARIABLES LIKE '%_read_only';

--echo # Case 3: Check that the change to transaction_* is reflected to tx_*.

SET transaction_isolation= 'SERIALIZABLE';
SET @@global.transaction_isolation= 'REPEATABLE-READ';
SELECT @@session.tx_isolation, @@global.tx_isolation,
@@session.transaction_isolation, @@global.transaction_isolation;
SHOW GLOBAL VARIABLES LIKE '%_isolation';
SHOW SESSION VARIABLES LIKE '%_isolation';

SET STATEMENT transaction_isolation= 'REPEATABLE-READ' FOR SHOW SESSION VARIABLES LIKE '%_isolation';
SHOW SESSION VARIABLES LIKE '%_isolation';

SET transaction_read_only= ON;
SET @@global.transaction_read_only= OFF;
SELECT @@session.tx_read_only, @@global.tx_read_only,
@@session.transaction_read_only, @@global.transaction_read_only;
SHOW GLOBAL VARIABLES LIKE '%_read_only';
SHOW SESSION VARIABLES LIKE '%_read_only';

SET STATEMENT transaction_read_only= OFF FOR SHOW SESSION VARIABLES LIKE '%_read_only';
SHOW SESSION VARIABLES LIKE '%_read_only';

SET @@global.transaction_isolation= @saved_global_isolation;
SET @@global.transaction_read_only= @saved_global_read_only;