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9ff272fbbd
DATABASE with open HANDLER" Remove LOCK_create_db, database name locks, and use metadata locks instead. This exposes CREATE/DROP/ALTER DATABASE statements to the graph-based deadlock detector in MDL, and paves the way for a safe, deadlock-free implementation of RENAME DATABASE. Database DDL statements will now take exclusive metadata locks on the database name, while table/view/routine DDL statements take intention exclusive locks on the database name. This prevents race conditions between database DDL and table/view/routine DDL. (e.g. DROP DATABASE with concurrent CREATE/ALTER/DROP TABLE) By adding database name locks, this patch implements WL#4450 "DDL locking: CREATE/DROP DATABASE must use database locks" and WL#4985 "DDL locking: namespace/hierarchical locks". The patch also changes code to use init_one_table() where appropriate. The new lock_table_names() function requires TABLE_LIST::db_length to be set correctly, and this is taken care of by init_one_table(). This patch also adds a simple template to help work with the mysys HASH data structure. Most of the patch was written by Konstantin Osipov.
65 lines
2.4 KiB
Text
65 lines
2.4 KiB
Text
DROP TABLE IF EXISTS t1, t2;
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SET DEBUG_SYNC= 'RESET';
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#
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# Bug#42438: Crash ha_partition::change_table_ptr
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# Test when remove partitioning is done while drop table is waiting
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# for the table.
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# After MDL was introduced, there is no longer any race, so test is done
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# by adding a small sleep to verify that the delete waits.
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# Con 1
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SET DEBUG_SYNC= 'RESET';
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CREATE TABLE t1
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(a INTEGER,
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b INTEGER NOT NULL,
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KEY (b))
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ENGINE = MYISAM
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/*!50100 PARTITION BY RANGE (a)
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(PARTITION p0 VALUES LESS THAN (2),
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PARTITION p1 VALUES LESS THAN (20),
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PARTITION p2 VALUES LESS THAN (100),
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PARTITION p3 VALUES LESS THAN MAXVALUE ) */;
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SET SESSION debug= "+d,sleep_before_create_table_no_lock";
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SET DEBUG_SYNC= 'alter_table_before_create_table_no_lock SIGNAL removing_partitioning WAIT_FOR waiting_for_alter';
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SET DEBUG_SYNC= 'alter_table_before_main_binlog SIGNAL partitioning_removed';
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ALTER TABLE t1 REMOVE PARTITIONING;
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# Con default
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SET DEBUG_SYNC= 'now WAIT_FOR removing_partitioning';
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SET DEBUG_SYNC= 'mdl_acquire_lock_wait SIGNAL waiting_for_alter';
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SET DEBUG_SYNC= 'rm_table_part2_before_delete_table WAIT_FOR partitioning_removed';
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DROP TABLE IF EXISTS t1;
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# Con 1
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SET SESSION debug= "-d,sleep_before_create_table_no_lock";
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SET DEBUG_SYNC= 'RESET';
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SET DEBUG_SYNC= 'RESET';
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#
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# Bug#42438: Crash ha_partition::change_table_ptr
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# Test when remove partitioning is failing due to drop table is already
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# in progress.
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# After MDL was introduced, there is no longer any race, so test is done
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# by adding a small sleep to verify that the alter waits.
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CREATE TABLE t2
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(a INTEGER,
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b INTEGER NOT NULL,
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KEY (b))
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ENGINE = MYISAM
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/*!50100 PARTITION BY RANGE (a)
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(PARTITION p0 VALUES LESS THAN (2),
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PARTITION p1 VALUES LESS THAN (20),
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PARTITION p2 VALUES LESS THAN (100),
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PARTITION p3 VALUES LESS THAN MAXVALUE ) */;
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SET DEBUG_SYNC= 'alter_table_before_open_tables SIGNAL removing_partitions WAIT_FOR waiting_for_alter';
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SET DEBUG_SYNC= 'alter_table_before_rename_result_table WAIT_FOR delete_done';
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ALTER TABLE t2 REMOVE PARTITIONING;
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# Con default
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SET SESSION debug= "+d,sleep_before_part2_delete_table";
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SET DEBUG_SYNC= 'now WAIT_FOR removing_partitions';
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SET DEBUG_SYNC= 'rm_table_part2_before_delete_table SIGNAL waiting_for_alter';
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SET DEBUG_SYNC= 'rm_table_part2_before_binlog SIGNAL delete_done';
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DROP TABLE IF EXISTS t2;
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SET SESSION debug= "-d,sleep_before_part2_delete_table";
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# Con 1
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ERROR 42S02: Table 'test.t2' doesn't exist
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SET DEBUG_SYNC= 'RESET';
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# Con default
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SET DEBUG_SYNC= 'RESET';
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End of 5.1 tests
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