SET @old_innodb_enable_xap_unlock_unmodified_for_primary_debug=
@@GLOBAL.innodb_enable_xap_unlock_unmodified_for_primary_debug;
SET GLOBAL innodb_enable_xap_unlock_unmodified_for_primary_debug= 1;
SET @saved_dbug = @@GLOBAL.debug_dbug;
CREATE TABLE t(id INT PRIMARY KEY) ENGINE=InnoDB STATS_PERSISTENT=0;
InnoDB		0 transactions not purged
INSERT INTO t VALUES (10), (20), (30);
connect prevent_purge,localhost,root,,;
start transaction with consistent snapshot;
connection default;
DELETE FROM t WHERE id = 20;
SET @@GLOBAL.debug_dbug=
"+d,enable_row_purge_remove_clust_if_poss_low_sync_point";
XA START '1';
UPDATE t SET id=40 WHERE id=30;
XA END '1';
connection prevent_purge;
COMMIT;
SET DEBUG_SYNC=
'now WAIT_FOR row_purge_remove_clust_if_poss_low_before_delete';
SET @@GLOBAL.debug_dbug=
"-d,enable_row_purge_remove_clust_if_poss_low_sync_point";
connection default;
SET DEBUG_SYNC=
"lock_rec_unlock_unmodified_start SIGNAL lock_sys_latched WAIT_FOR cont";
XA PREPARE '1';
connection prevent_purge;
SET DEBUG_SYNC= 'now SIGNAL row_purge_remove_clust_if_poss_low_cont';
SET DEBUG_SYNC= 'now SIGNAL cont';
disconnect prevent_purge;
connection default;
XA COMMIT '1';
SET DEBUG_SYNC="RESET";
TRUNCATE TABLE t;
InnoDB		0 transactions not purged
INSERT INTO t VALUES (10), (20), (30);
connect prevent_purge,localhost,root,,;
start transaction with consistent snapshot;
connection default;
DELETE FROM t WHERE id = 20;
SET @@GLOBAL.debug_dbug=
"+d,enable_row_purge_remove_clust_if_poss_low_sync_point";
SET @@GLOBAL.debug_dbug="+d,skip_lock_release_on_prepare_try";
XA START '1';
UPDATE t SET id=40 WHERE id=30;
XA END '1';
connection prevent_purge;
COMMIT;
SET DEBUG_SYNC=
'now WAIT_FOR row_purge_remove_clust_if_poss_low_before_delete';
SET @@GLOBAL.debug_dbug=
"-d,enable_row_purge_remove_clust_if_poss_low_sync_point";
connection default;
SET DEBUG_SYNC=
"lock_rec_unlock_unmodified_start SIGNAL lock_sys_latched WAIT_FOR cont";
XA PREPARE '1';
connection prevent_purge;
SET DEBUG_SYNC= 'now SIGNAL row_purge_remove_clust_if_poss_low_cont';
SET DEBUG_SYNC= 'now SIGNAL cont';
disconnect prevent_purge;
connection default;
XA COMMIT '1';
SET DEBUG_SYNC="RESET";
TRUNCATE TABLE t;
SET @@GLOBAL.debug_dbug = @saved_dbug;
DROP TABLE t;
SET GLOBAL innodb_enable_xap_unlock_unmodified_for_primary_debug=
@old_innodb_enable_xap_unlock_unmodified_for_primary_debug;
