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https://github.com/MariaDB/server.git
synced 2025-11-10 23:02:54 +03:00
44 lines
1.8 KiB
Plaintext
44 lines
1.8 KiB
Plaintext
SET @save_freq=@@GLOBAL.innodb_purge_rseg_truncate_frequency;
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SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
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CREATE TABLE t (a int PRIMARY KEY, b int NOT NULL UNIQUE) engine = InnoDB, STATS_PERSISTENT=0;
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InnoDB 0 transactions not purged
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connect prevent_purge,localhost,root,,;
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start transaction with consistent snapshot;
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connect con_del_1,localhost,root,,;
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INSERT INTO t VALUES (20,20);
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SET DEBUG_SYNC = 'innodb_row_search_for_mysql_exit SIGNAL first_del_row_search_mvcc_finished WAIT_FOR first_del_cont';
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DELETE FROM t WHERE b = 20 # trx_1;
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connect con_ins_1,localhost,root,,;
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SET DEBUG_SYNC = 'now WAIT_FOR first_del_row_search_mvcc_finished';
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SET DEBUG_SYNC = 'lock_wait_start SIGNAL first_ins_locked';
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SET DEBUG_SYNC = 'ib_after_row_insert SIGNAL first_ins_row_inserted WAIT_FOR first_ins_cont';
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INSERT INTO t VALUES(10, 20) # trx_2;
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connect con_del_2,localhost,root,,;
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SET TRANSACTION ISOLATION LEVEL READ COMMITTED;
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SET DEBUG_SYNC = 'now WAIT_FOR first_ins_locked';
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SET DEBUG_SYNC = 'lock_wait_start SIGNAL second_del_locked';
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DELETE FROM t WHERE b = 20 # trx_3;
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connection default;
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SET DEBUG_SYNC = 'now WAIT_FOR second_del_locked';
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SET @saved_dbug = @@GLOBAL.debug_dbug;
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SET @@GLOBAL.debug_dbug="d,enable_row_purge_del_mark_exit_sync_point";
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SET DEBUG_SYNC = 'now SIGNAL first_del_cont';
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SET DEBUG_SYNC = 'now WAIT_FOR first_ins_row_inserted';
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connection con_del_1;
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connection default;
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disconnect prevent_purge;
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SET DEBUG_SYNC = 'now WAIT_FOR row_purge_del_mark_finished';
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SET @@GLOBAL.debug_dbug = @saved_dbug;
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SET DEBUG_SYNC = 'now SIGNAL first_ins_cont';
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connection con_del_2;
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connection con_ins_1;
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connection default;
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INSERT INTO t VALUES(30, 20);
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disconnect con_ins_1;
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disconnect con_del_1;
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disconnect con_del_2;
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connection default;
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SET DEBUG_SYNC = 'RESET';
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DROP TABLE t;
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SET GLOBAL innodb_purge_rseg_truncate_frequency=@save_freq;
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