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bug #57006 "Deadlock between HANDLER and FLUSH TABLES WITH READ LOCK" and bug #54673 "It takes too long to get readlock for 'FLUSH TABLES WITH READ LOCK'". The first bug manifested itself as a deadlock which occurred when a connection, which had some table open through HANDLER statement, tried to update some data through DML statement while another connection tried to execute FLUSH TABLES WITH READ LOCK concurrently. What happened was that FTWRL in the second connection managed to perform first step of GRL acquisition and thus blocked all upcoming DML. After that it started to wait for table open through HANDLER statement to be flushed. When the first connection tried to execute DML it has started to wait for GRL/the second connection creating deadlock. The second bug manifested itself as starvation of FLUSH TABLES WITH READ LOCK statements in cases when there was a constant stream of concurrent DML statements (in two or more connections). This has happened because requests for protection against GRL which were acquired by DML statements were ignoring presence of pending GRL and thus the latter was starved. This patch solves both these problems by re-implementing GRL using metadata locks. Similar to the old implementation acquisition of GRL in new implementation is two-step. During the first step we block all concurrent DML and DDL statements by acquiring global S metadata lock (each DML and DDL statement acquires global IX lock for its duration). During the second step we block commits by acquiring global S lock in COMMIT namespace (commit code acquires global IX lock in this namespace). Note that unlike in old implementation acquisition of protection against GRL in DML and DDL is semi-automatic. We assume that any statement which should be blocked by GRL will either open and acquires write-lock on tables or acquires metadata locks on objects it is going to modify. For any such statement global IX metadata lock is automatically acquired for its duration. The first problem is solved because waits for GRL become visible to deadlock detector in metadata locking subsystem and thus deadlocks like one in the first bug become impossible. The second problem is solved because global S locks which are used for GRL implementation are given preference over IX locks which are acquired by concurrent DML (and we can switch to fair scheduling in future if needed). Important change: FTWRL/GRL no longer blocks DML and DDL on temporary tables. Before this patch behavior was not consistent in this respect: in some cases DML/DDL statements on temporary tables were blocked while in others they were not. Since the main use cases for FTWRL are various forms of backups and temporary tables are not preserved during backups we have opted for consistently allowing DML/DDL on temporary tables during FTWRL/GRL. Important change: This patch changes thread state names which are used when DML/DDL of FTWRL is waiting for global read lock. It is now either "Waiting for global read lock" or "Waiting for commit lock" depending on the stage on which FTWRL is. Incompatible change: To solve deadlock in events code which was exposed by this patch we have to replace LOCK_event_metadata mutex with metadata locks on events. As result we have to prohibit DDL on events under LOCK TABLES. This patch also adds extensive test coverage for interaction of DML/DDL and FTWRL. Performance of new and old global read lock implementations in sysbench tests were compared. There were no significant difference between new and old implementations. mysql-test/include/check_ftwrl_compatible.inc: Added helper script which allows to check that a statement is compatible with FLUSH TABLES WITH READ LOCK. mysql-test/include/check_ftwrl_incompatible.inc: Added helper script which allows to check that a statement is incompatible with FLUSH TABLES WITH READ LOCK. mysql-test/include/handler.inc: Adjusted test case to the fact that now DROP TABLE closes open HANDLERs for the table to be dropped before checking if there active FTWRL in this connection. mysql-test/include/wait_show_condition.inc: Fixed small error in the timeout message. The correct name of variable used as parameter for this script is "$condition" and not "$wait_condition". mysql-test/r/delayed.result: Added test coverage for scenario which triggered assert in metadata locking subsystem. mysql-test/r/events_2.result: Updated test results after prohibiting event DDL operations under LOCK TABLES. mysql-test/r/flush.result: Added test coverage for bug #57006 "Deadlock between HANDLER and FLUSH TABLES WITH READ LOCK". mysql-test/r/flush_read_lock.result: Added test coverage for various aspects of FLUSH TABLES WITH READ LOCK functionality. mysql-test/r/flush_read_lock_kill.result: Adjusted test case after replacing custom global read lock implementation with one based on metadata locks. Use new debug_sync point. Do not disable concurrent inserts as now InnoDB we always use InnoDB table. mysql-test/r/handler_innodb.result: Adjusted test case to the fact that now DROP TABLE closes open HANDLERs for the table to be dropped before checking if there active FTWRL in this connection. mysql-test/r/handler_myisam.result: Adjusted test case to the fact that now DROP TABLE closes open HANDLERs for the table to be dropped before checking if there active FTWRL in this connection. mysql-test/r/mdl_sync.result: Adjusted test case after replacing custom global read lock implementation with one based on metadata locks. Replaced usage of GRL-specific debug_sync's with appropriate sync points in MDL subsystem. mysql-test/suite/perfschema/r/dml_setup_instruments.result: Updated test results after removing global COND_global_read_lock condition variable. mysql-test/suite/perfschema/r/func_file_io.result: Ensure that this test doesn't affect subsequent tests. At the end of its execution enable back P_S instrumentation which this test disables at some point. mysql-test/suite/perfschema/r/func_mutex.result: Ensure that this test doesn't affect subsequent tests. At the end of its execution enable back P_S instrumentation which this test disables at some point. mysql-test/suite/perfschema/r/global_read_lock.result: Adjusted test case to take into account that new GRL implementation is based on MDL. mysql-test/suite/perfschema/r/server_init.result: Adjusted test case after replacing custom global read lock implementation with one based on MDL and replacing LOCK_event_metadata mutex with metadata lock. mysql-test/suite/perfschema/t/func_file_io.test: Ensure that this test doesn't affect subsequent tests. At the end of its execution enable back P_S instrumentation which this test disables at some point. mysql-test/suite/perfschema/t/func_mutex.test: Ensure that this test doesn't affect subsequent tests. At the end of its execution enable back P_S instrumentation which this test disables at some point. mysql-test/suite/perfschema/t/global_read_lock.test: Adjusted test case to take into account that new GRL implementation is based on MDL. mysql-test/suite/perfschema/t/server_init.test: Adjusted test case after replacing custom global read lock implementation with one based on MDL and replacing LOCK_event_metadata mutex with metadata lock. mysql-test/suite/rpl/r/rpl_tmp_table_and_DDL.result: Updated test results after prohibiting event DDL under LOCK TABLES. mysql-test/t/delayed.test: Added test coverage for scenario which triggered assert in metadata locking subsystem. mysql-test/t/events_2.test: Updated test case after prohibiting event DDL operations under LOCK TABLES. mysql-test/t/flush.test: Added test coverage for bug #57006 "Deadlock between HANDLER and FLUSH TABLES WITH READ LOCK". mysql-test/t/flush_block_commit.test: Adjusted test case after changing thread state name which is used when COMMIT waits for FLUSH TABLES WITH READ LOCK from "Waiting for release of readlock" to "Waiting for commit lock". mysql-test/t/flush_block_commit_notembedded.test: Adjusted test case after changing thread state name which is used when DML waits for FLUSH TABLES WITH READ LOCK. Now we use "Waiting for global read lock" in this case. mysql-test/t/flush_read_lock.test: Added test coverage for various aspects of FLUSH TABLES WITH READ LOCK functionality. mysql-test/t/flush_read_lock_kill-master.opt: We no longer need to use make_global_read_lock_block_commit_loop debug tag in this test. Instead we rely on an appropriate debug_sync point in MDL code. mysql-test/t/flush_read_lock_kill.test: Adjusted test case after replacing custom global read lock implementation with one based on metadata locks. Use new debug_sync point. Do not disable concurrent inserts as now InnoDB we always use InnoDB table. mysql-test/t/lock_multi.test: Adjusted test case after changing thread state names which are used when DML or DDL waits for FLUSH TABLES WITH READ LOCK to "Waiting for global read lock". mysql-test/t/mdl_sync.test: Adjusted test case after replacing custom global read lock implementation with one based on metadata locks. Replaced usage of GRL-specific debug_sync's with appropriate sync points in MDL subsystem. Updated thread state names which are used when DDL waits for FTWRL. mysql-test/t/trigger_notembedded.test: Adjusted test case after changing thread state names which are used when DML or DDL waits for FLUSH TABLES WITH READ LOCK to "Waiting for global read lock". sql/event_data_objects.cc: Removed Event_queue_element::status/last_executed_changed members and Event_queue_element::update_timing_fields() method. We no longer use this class for updating mysql.events once event is chosen for execution. Accesses to instances of this class in scheduler thread require protection by Event_queue::LOCK_event_queue mutex and we try to avoid updating table while holding this lock. sql/event_data_objects.h: Removed Event_queue_element::status/last_executed_changed members and Event_queue_element::update_timing_fields() method. We no longer use this class for updating mysql.events once event is chosen for execution. Accesses to instances of this class in scheduler thread require protection by Event_queue::LOCK_event_queue mutex and we try to avoid updating table while holding this lock. sql/event_db_repository.cc: - Changed Event_db_repository methods to not release all metadata locks once they are done updating mysql.events table. This allows to keep metadata lock protecting against GRL and lock protecting particular event around until corresponding DDL statement is written to the binary log. - Removed logic for conditional update of "status" and "last_executed" fields from update_timing_fields_for_event() method. In the only case when this method is called now "last_executed" is always modified and tracking change of "status" is too much hassle. sql/event_db_repository.h: Removed logic for conditional update of "status" and "last_executed" fields from Event_db_repository:: update_timing_fields_for_event() method. In the only case when this method is called now "last_executed" is always modified and tracking change of "status" field is too much hassle. sql/event_queue.cc: Changed event scheduler code not to update mysql.events table while holding Event_queue::LOCK_event_queue mutex. Doing so led to a deadlock with a new GRL implementation. This deadlock didn't occur with old implementation due to fact that code acquiring protection against GRL ignored pending GRL requests (which lead to GRL starvation). One of goals of new implementation is to disallow GRL starvation and so we have to solve problem with this deadlock in a different way. sql/events.cc: Changed methods of Events class to acquire protection against GRL while perfoming DDL statement and keep it until statement is written to the binary log. Unfortunately this step together with new GRL implementation exposed deadlock involving Events::LOCK_event_metadata and GRL. To solve it Events::LOCK_event_metadata mutex was replaced with a metadata lock on event. As a side-effect events DDL has to be prohibited under LOCK TABLES even in cases when mysql.events table was explicitly locked for write. sql/events.h: Replaced Events::LOCK_event_metadata mutex with a metadata lock on event. sql/ha_ndbcluster.cc: Updated code after replacing custom global read lock implementation with one based on MDL. Since MDL subsystem should now be able to detect deadlocks involving metadata locks and GRL there is no need for special handling of active GRL. sql/handler.cc: Replaced custom implementation of global read lock with one based on metadata locks. Consequently when doing commit instead of calling method of Global_read_lock class to acquire protection against GRL we simply acquire IX in COMMIT namespace. sql/lock.cc: Replaced custom implementation of global read lock with one based on metadata locks. This step allows to expose wait for GRL to deadlock detector of MDL subsystem and thus succesfully resolve deadlocks similar to one behind bug #57006 "Deadlock between HANDLER and FLUSH TABLES WITH READ LOCK". It also solves problem with GRL starvation described in bug #54673 "It takes too long to get readlock for 'FLUSH TABLES WITH READ LOCK'" since metadata locks used by GRL give preference to FTWRL statement instead of DML statements (if needed in future this can be changed to fair scheduling). Similar to old implementation of acquisition of GRL is two-step. During the first step we block all concurrent DML and DDL statements by acquiring global S metadata lock (each DML and DDL statement acquires global IX lock for its duration). During the second step we block commits by acquiring global S lock in COMMIT namespace (commit code acquires global IX lock in this namespace). Note that unlike in old implementation acquisition of protection against GRL in DML and DDL is semi-automatic. We assume that any statement which should be blocked by GRL will either open and acquires write-lock on tables or acquires metadata locks on objects it is going to modify. For any such statement global IX metadata lock is automatically acquired for its duration. To support this change: - Global_read_lock::lock/unlock_global_read_lock and make_global_read_lock_block_commit methods were changed accordingly. - Global_read_lock::wait_if_global_read_lock() and start_waiting_global_read_lock() methods were dropped. It is now responsibility of code acquiring metadata locks opening tables to acquire protection against GRL by explicitly taking global IX lock with statement duration. - Global variables, mutex and condition variable used by old implementation was removed. - lock_routine_name() was changed to use statement duration for its global IX lock. It was also renamed to lock_object_name() as it now also used to take metadata locks on events. - Global_read_lock::set_explicit_lock_duration() was added which allows not to release locks used for GRL when leaving prelocked mode. sql/lock.h: - Renamed lock_routine_name() to lock_object_name() and changed its signature to allow its usage for events. - Removed broadcast_refresh() function. It is no longer needed with new GRL implementation. sql/log_event.cc: Release metadata locks with statement duration at the end of processing legacy event for LOAD DATA. This ensures that replication thread processing such event properly releases its protection against global read lock. sql/mdl.cc: Changed MDL subsystem to support new MDL-based implementation of global read lock. Added COMMIT and EVENTS namespaces for metadata locks. Changed thread state name for GLOBAL namespace to "Waiting for global read lock". Optimized MDL_map::find_or_insert() method to avoid taking m_mutex mutex when looking up MDL_lock objects for GLOBAL or COMMIT namespaces. We keep pre-created MDL_lock objects for these namespaces around and simply return pointers to these global objects when needed. Changed MDL_lock/MDL_scoped_lock to properly handle notification of insert delayed handler threads when FTWRL takes global S lock. Introduced concept of lock duration. In addition to locks with transaction duration which work in the way which is similar to how locks worked before (i.e. they are released at the end of transaction), locks with statement and explicit duration were introduced. Locks with statement duration are automatically released at the end of statement. Locks with explicit duration require explicit release and obsolete concept of transactional sentinel. * Changed MDL_request and MDL_ticket classes to support notion of duration. * Changed MDL_context to keep locks with different duration in different lists. Changed code handling ticket list to take this into account. * Changed methods responsible for releasing locks to take into account duration of tickets. Particularly public MDL_context::release_lock() method now only can release tickets with explicit duration (there is still internal method which allows to specify duration). To release locks with statement or transaction duration one have to use release_statement/transactional_locks() methods. * Concept of savepoint for MDL subsystem now has to take into account locks with statement duration. Consequently MDL_savepoint class was introduced and methods working with savepoints were updated accordingly. * Added methods which allow to set duration for one or all locks in the context. sql/mdl.h: Changed MDL subsystem to support new MDL-based implementation of global read lock. Added COMMIT and EVENTS namespaces for metadata locks. Introduced concept of lock duration. In addition to locks with transaction duration which work in the way which is similar to how locks worked before (i.e. they are released at the end of transaction), locks with statement and explicit duration were introduced. Locks with statement duration are automatically released at the end of statement. Locks with explicit duration require explicit release and obsolete concept of transactional sentinel. * Changed MDL_request and MDL_ticket classes to support notion of duration. * Changed MDL_context to keep locks with different duration in different lists. Changed code handling ticket list to take this into account. * Changed methods responsible for releasing locks to take into account duration of tickets. Particularly public MDL_context::release_lock() method now only can release tickets with explicit duration (there is still internal method which allows to specify duration). To release locks with statement or transaction duration one have to use release_statement/transactional_locks() methods. * Concept of savepoint for MDL subsystem now has to take into account locks with statement duration. Consequently MDL_savepoint class was introduced and methods working with savepoints were updated accordingly. * Added methods which allow to set duration for one or all locks in the context. sql/mysqld.cc: Removed global mutex and condition variables which were used by old implementation of GRL. Also we no longer need to initialize Events::LOCK_event_metadata mutex as it was replaced with metadata locks on events. sql/mysqld.h: Removed global variable, mutex and condition variables which were used by old implementation of GRL. sql/rpl_rli.cc: When slave thread closes tables which were open for handling of RBR events ensure that it releases global IX lock which was acquired as protection against GRL. sql/sp.cc: Adjusted code to the new signature of lock_object/routine_name(), to the fact that one now needs specify duration of lock when initializing MDL_request and to the fact that savepoints for MDL subsystem are now represented by MDL_savepoint class. sql/sp_head.cc: Ensure that statements in stored procedures release statement metadata locks and thus release their protectiong against GRL in proper moment in time. Adjusted code to the fact that one now needs specify duration of lock when initializing MDL_request. sql/sql_admin.cc: Adjusted code to the fact that one now needs specify duration of lock when initializing MDL_request. sql/sql_base.cc: - Implemented support for new approach to acquiring protection against global read lock. We no longer acquire such protection explicitly on the basis of statement flags. Instead we always rely on code which is responsible for acquiring metadata locks on object to be changed acquiring this protection. This is achieved by acquiring global IX metadata lock with statement duration. Code doing this also responsible for checking that current connection has no active GRL by calling an Global_read_lock::can_acquire_protection() method. Changed code in open_table() and lock_table_names() accordingly. Note that as result of this change DDL and DML on temporary tables is always compatible with GRL (before it was incompatible in some cases and compatible in other cases). - To speed-up code acquiring protection against GRL introduced m_has_protection_against_grl member in Open_table_context class. It indicates that protection was already acquired sometime during open_tables() execution and new attempts can be skipped. - Thanks to new GRL implementation calls to broadcast_refresh() became unnecessary and were removed. - Adjusted code to the fact that one now needs specify duration of lock when initializing MDL_request and to the fact that savepoints for MDL subsystem are now represented by MDL_savepoint class. sql/sql_base.h: Adjusted code to the fact that savepoints for MDL subsystem are now represented by MDL_savepoint class. Also introduced Open_table_context::m_has_protection_against_grl member which allows to avoid acquiring protection against GRL while opening tables if such protection was already acquired. sql/sql_class.cc: Changed THD::leave_locked_tables_mode() after transactional sentinel for metadata locks was obsoleted by introduction of locks with explicit duration. sql/sql_class.h: - Adjusted code to the fact that savepoints for MDL subsystem are now represented by MDL_savepoint class. - Changed Global_read_lock class according to changes in global read lock implementation: * wait_if_global_read_lock and start_waiting_global_read_lock are now gone. Instead code needing protection against GRL has to acquire global IX metadata lock with statement duration itself. To help it new can_acquire_protection() was introduced. Also as result of the above change m_protection_count member is gone too. * Added m_mdl_blocks_commits_lock member to store metadata lock blocking commits. * Adjusted code to the fact that concept of transactional sentinel was obsoleted by concept of lock duration. - Removed CF_PROTECT_AGAINST_GRL flag as it is no longer necessary. New GRL implementation acquires protection against global read lock automagically when statement acquires metadata locks on tables or other objects it is going to change. sql/sql_db.cc: Adjusted code to the fact that one now needs specify duration of lock when initializing MDL_request. sql/sql_handler.cc: Removed call to broadcast_refresh() function. It is no longer needed with new GRL implementation. Adjusted code after introducing duration concept for metadata locks. Particularly to the fact transactional sentinel was replaced with explicit duration. sql/sql_handler.h: Renamed mysql_ha_move_tickets_after_trans_sentinel() to mysql_ha_set_explicit_lock_duration() after transactional sentinel was obsoleted by locks with explicit duration. sql/sql_insert.cc: Adjusted code handling delaying inserts after switching to new GRL implementation. Now connection thread initiating delayed insert has to acquire global IX lock in addition to metadata lock on table being inserted into. This IX lock protects against GRL and similarly to SW lock on table being inserted into has to be passed to handler thread in order to avoid deadlocks. sql/sql_lex.cc: LEX::protect_against_global_read_lock member is no longer necessary since protection against GRL is automatically taken by code acquiring metadata locks/opening tables. sql/sql_lex.h: LEX::protect_against_global_read_lock member is no longer necessary since protection against GRL is automatically taken by code acquiring metadata locks/opening tables. sql/sql_parse.cc: - Implemented support for new approach to acquiring protection against global read lock. We no longer acquire such protection explicitly on the basis of statement flags. Instead we always rely on code which is responsible for acquiring metadata locks on object to be changed acquiring this protection. This is achieved by acquiring global IX metadata lock with statement duration. This lock is automatically released at the end of statement execution. - Changed implementation of CREATE/DROP PROCEDURE/FUNCTION not to release metadata locks and thus protection against of GRL in the middle of statement execution. - Adjusted code to the fact that one now needs specify duration of lock when initializing MDL_request and to the fact that savepoints for MDL subsystem are now represented by MDL_savepoint class. sql/sql_prepare.cc: Adjusted code to the to the fact that savepoints for MDL subsystem are now represented by MDL_savepoint class. sql/sql_rename.cc: With new GRL implementation there is no need to explicitly acquire protection against GRL before renaming tables. This happens automatically in code which acquires metadata locks on tables being renamed. sql/sql_show.cc: Adjusted code to the fact that one now needs specify duration of lock when initializing MDL_request and to the fact that savepoints for MDL subsystem are now represented by MDL_savepoint class. sql/sql_table.cc: - With new GRL implementation there is no need to explicitly acquire protection against GRL before dropping tables. This happens automatically in code which acquires metadata locks on tables being dropped. - Changed mysql_alter_table() not to release lock on new table name explicitly and to rely on automatic release of locks at the end of statement instead. This was necessary since now MDL_context::release_lock() is supported only for locks for explicit duration. sql/sql_trigger.cc: With new GRL implementation there is no need to explicitly acquire protection against GRL before changing table triggers. This happens automatically in code which acquires metadata locks on tables which triggers are to be changed. sql/sql_update.cc: Fix bug exposed by GRL testing. During prepare phase acquire only S metadata locks instead of SW locks to keep prepare of multi-UPDATE compatible with concurrent LOCK TABLES WRITE and global read lock. sql/sql_view.cc: With new GRL implementation there is no need to explicitly acquire protection against GRL before creating view. This happens automatically in code which acquires metadata lock on view to be created. sql/sql_yacc.yy: LEX::protect_against_global_read_lock member is no longer necessary since protection against GRL is automatically taken by code acquiring metadata locks/opening tables. sql/table.cc: Adjusted code to the fact that one now needs specify duration of lock when initializing MDL_request. sql/table.h: Adjusted code to the fact that one now needs specify duration of lock when initializing MDL_request. sql/transaction.cc: Replaced custom implementation of global read lock with one based on metadata locks. Consequently when doing commit instead of calling method of Global_read_lock class to acquire protection against GRL we simply acquire IX in COMMIT namespace. Also adjusted code to the fact that MDL savepoint is now represented by MDL_savepoint class.
522 lines
16 KiB
Text
522 lines
16 KiB
Text
# changes 2008-02-20 hhunger splitted events.test into events_1 and events_2
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#
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# Can't test with embedded server that doesn't support grants
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-- source include/not_embedded.inc
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--disable_warnings
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drop database if exists events_test;
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--enable_warnings
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create database events_test;
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use events_test;
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#
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# mysql.event intact checking end
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#
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create event e_26 on schedule at '2017-01-01 00:00:00' disable do set @a = 5;
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select db, name, body, definer, convert_tz(execute_at, 'UTC', 'SYSTEM'), on_completion from mysql.event;
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drop event e_26;
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--error ER_WRONG_VALUE
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create event e_26 on schedule at NULL disable do set @a = 5;
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--error ER_WRONG_VALUE
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create event e_26 on schedule at 'definitely not a datetime' disable do set @a = 5;
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set names utf8;
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create event задачка on schedule every 123 minute starts now() ends now() + interval 1 month do select 1;
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drop event задачка;
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--echo "DISABLE the scheduler. Testing that it does not work when the variable is 0"
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set global event_scheduler=off;
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select definer, name, db from mysql.event;
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select get_lock("test_lock1", 20);
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create event закачка on schedule every 10 hour do select get_lock("test_lock1", 20);
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--echo "Should return 1 row"
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select definer, name, db from mysql.event;
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--echo "Should be only 0 process"
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select /*1*/ user, host, db, command, state, info
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from information_schema.processlist
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where (user='event_scheduler')
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order by info;
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select release_lock("test_lock1");
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drop event закачка;
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--echo "Should have 0 events"
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select count(*) from mysql.event;
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#
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#
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#
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--echo "ENABLE the scheduler and get a lock"
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set global event_scheduler=on;
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select get_lock("test_lock2", 20);
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--echo "Create an event which tries to acquire a mutex. The event locks on the mutex"
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create event закачка on schedule every 10 hour do select get_lock("test_lock2", 20);
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--echo "Should have only 2 processes: the scheduler and the locked event"
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let $wait_condition= select count(*) = 2 from information_schema.processlist
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where ( (state like 'User lock%' AND info like 'select get_lock%')
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OR (command='Daemon' AND user='event_scheduler' AND
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state = 'Waiting for next activation'));
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--source include/wait_condition.inc
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select /*2*/ user, host, db, command, state, info
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from information_schema.processlist
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where (info like "select get_lock%" OR user='event_scheduler')
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order by info;
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--echo "Release the mutex, the event worker should finish."
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select release_lock("test_lock2");
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drop event закачка;
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# Wait for release_lock("test_lock2") to complete,
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# to avoid polluting the next test information_schema.processlist
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let $wait_condition= select count(*) = 0 from information_schema.processlist
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where (state like 'User lock%' AND info like 'select get_lock%');
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--source include/wait_condition.inc
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##
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## 1. get a lock
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## 2. create an event
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## 3. sleep so it has time to start
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## 4. should appear in processlist
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## 5. kill the scheduler, it will wait for the child to stop
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## 6. both processes should be there on show processlist
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## 7. release the lock and sleep, both scheduler and child should end
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set global event_scheduler=1;
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select get_lock("test_lock2_1", 20);
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create event закачка21 on schedule every 10 hour do select get_lock("test_lock2_1", 20);
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--echo "Should have only 2 processes: the scheduler and the locked event"
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let $wait_condition= select count(*) = 2 from information_schema.processlist
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where ( (state like 'User lock%' AND info like 'select get_lock%')
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OR (command='Daemon' AND user='event_scheduler' AND
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state = 'Waiting for next activation'));
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--source include/wait_condition.inc
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select /*3*/ user, host, db, command, state, info
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from information_schema.processlist
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where (info like "select get_lock%" OR user='event_scheduler')
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order by info;
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set global event_scheduler=off;
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let $wait_condition= select count(*) =1 from information_schema.processlist
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where (info like "select get_lock%" OR user='event_scheduler');
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--source include/wait_condition.inc
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--echo "Should have only our process now:"
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select /*4*/ user, host, db, command, state, info
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from information_schema.processlist
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where (info like "select get_lock%" OR user='event_scheduler')
|
||
order by info;
|
||
select release_lock("test_lock2_1");
|
||
drop event закачка21;
|
||
let $wait_condition=
|
||
select count(*) = 0 from information_schema.processlist
|
||
where db='events_test' and command = 'Connect' and user=current_user();
|
||
--source include/wait_condition.inc
|
||
|
||
####
|
||
# Bug #16410 Events: CREATE EVENT is legal in a CREATE TRIGGER statement
|
||
#
|
||
create table t_16 (s1 int);
|
||
--error ER_EVENT_RECURSION_FORBIDDEN
|
||
create trigger t_16_bi before insert on t_16 for each row create event e_16 on schedule every 1 second do set @a=5;
|
||
drop table t_16;
|
||
#
|
||
# end of test case
|
||
####
|
||
|
||
#
|
||
# START: BUG #17453: Creating Event crash the server
|
||
#
|
||
create event white_space
|
||
on schedule every 10 hour
|
||
disable
|
||
do
|
||
select 1;
|
||
select event_schema, event_name, definer, event_definition from information_schema.events where event_name='white_space';
|
||
drop event white_space;
|
||
create event white_space on schedule every 10 hour disable do
|
||
|
||
select 2;
|
||
select event_schema, event_name, definer, event_definition from information_schema.events where event_name='white_space';
|
||
drop event white_space;
|
||
create event white_space on schedule every 10 hour disable do select 3;
|
||
select event_schema, event_name, definer, event_definition from information_schema.events where event_name='white_space';
|
||
drop event white_space;
|
||
#
|
||
# END: BUG #17453: Creating Event crash the server
|
||
#
|
||
|
||
#
|
||
# Bug#17403 "Events: packets out of order with show create event"
|
||
#
|
||
create event e1 on schedule every 1 year do set @a = 5;
|
||
create table t1 (s1 int);
|
||
--error ER_SP_NO_RETSET
|
||
create trigger t1_ai after insert on t1 for each row show create event e1;
|
||
drop table t1;
|
||
drop event e1;
|
||
|
||
##set global event_scheduler=1;
|
||
##select get_lock("test_lock3", 20);
|
||
##create event закачка on schedule every 10 hour do select get_lock("test_lock3", 20);
|
||
##select sleep(2);
|
||
##select /*5*/ user, host, db, command, state, info from information_schema.processlist where info is null or info not like '%processlist%' order by info;
|
||
##drop event закачка;
|
||
##select release_lock("test_lock3");
|
||
|
||
#
|
||
# test with very often occuring event
|
||
# (disabled for now, locks)
|
||
##select get_lock("test_lock4", 20);
|
||
##create event закачка4 on schedule every 1 second do select get_lock("test_lock4", 20);
|
||
##select sleep(3);
|
||
##select /*6*/ user, host, db, command, state, info from information_schema.processlist where info is null or info not like '%processlist%' order by info;
|
||
##drop event закачка4;
|
||
##select release_lock("test_lock4");
|
||
|
||
##set global event_scheduler=off;
|
||
##select sleep(2);
|
||
##--replace_column 1 # 6 #
|
||
##show processlist;
|
||
##select count(*) from mysql.event;
|
||
|
||
#
|
||
# Test wrong syntax
|
||
#
|
||
|
||
--error ER_WRONG_DB_NAME
|
||
SHOW EVENTS FROM aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa;
|
||
--error ER_WRONG_DB_NAME
|
||
SHOW EVENTS FROM ``;
|
||
|
||
SHOW EVENTS FROM `events\\test`;
|
||
#
|
||
# A check for events SQL under LOCK TABLES and in pre-locked mode.
|
||
#
|
||
--echo
|
||
--echo LOCK TABLES mode.
|
||
--echo
|
||
#
|
||
# SHOW CREATE EVENT and INFORMATION_SCHEMA.events are available and
|
||
# cause an implicit lock/unlock of mysql.event table, regardless of the
|
||
# currently locked tables.
|
||
#
|
||
create table t1 (a int);
|
||
create event e1 on schedule every 10 hour do select 1;
|
||
#
|
||
lock table t1 read;
|
||
#
|
||
--replace_regex /STARTS '[^']+'/STARTS '#'/
|
||
show create event e1;
|
||
select event_name from information_schema.events;
|
||
--error ER_LOCK_OR_ACTIVE_TRANSACTION
|
||
create event e2 on schedule every 10 hour do select 1;
|
||
--error ER_LOCK_OR_ACTIVE_TRANSACTION
|
||
alter event e2 disable;
|
||
--error ER_LOCK_OR_ACTIVE_TRANSACTION
|
||
alter event e2 rename to e3;
|
||
--error ER_LOCK_OR_ACTIVE_TRANSACTION
|
||
drop event e2;
|
||
--error ER_LOCK_OR_ACTIVE_TRANSACTION
|
||
drop event e1;
|
||
unlock tables;
|
||
#
|
||
lock table t1 write;
|
||
#
|
||
--replace_regex /STARTS '[^']+'/STARTS '#'/
|
||
show create event e1;
|
||
select event_name from information_schema.events;
|
||
--error ER_LOCK_OR_ACTIVE_TRANSACTION
|
||
create event e2 on schedule every 10 hour do select 1;
|
||
--error ER_LOCK_OR_ACTIVE_TRANSACTION
|
||
alter event e2 disable;
|
||
--error ER_LOCK_OR_ACTIVE_TRANSACTION
|
||
alter event e2 rename to e3;
|
||
--error ER_LOCK_OR_ACTIVE_TRANSACTION
|
||
drop event e2;
|
||
--error ER_LOCK_OR_ACTIVE_TRANSACTION
|
||
drop event e1;
|
||
unlock tables;
|
||
#
|
||
lock table t1 read, mysql.event read;
|
||
#
|
||
--replace_regex /STARTS '[^']+'/STARTS '#'/
|
||
show create event e1;
|
||
select event_name from information_schema.events;
|
||
--error ER_LOCK_OR_ACTIVE_TRANSACTION
|
||
create event e2 on schedule every 10 hour do select 1;
|
||
--error ER_LOCK_OR_ACTIVE_TRANSACTION
|
||
alter event e2 disable;
|
||
--error ER_LOCK_OR_ACTIVE_TRANSACTION
|
||
alter event e2 rename to e3;
|
||
--error ER_LOCK_OR_ACTIVE_TRANSACTION
|
||
drop event e2;
|
||
--error ER_LOCK_OR_ACTIVE_TRANSACTION
|
||
drop event e1;
|
||
unlock tables;
|
||
#
|
||
lock table t1 write, mysql.event read;
|
||
#
|
||
--replace_regex /STARTS '[^']+'/STARTS '#'/
|
||
show create event e1;
|
||
select event_name from information_schema.events;
|
||
--error ER_LOCK_OR_ACTIVE_TRANSACTION
|
||
create event e2 on schedule every 10 hour do select 1;
|
||
--error ER_LOCK_OR_ACTIVE_TRANSACTION
|
||
alter event e2 disable;
|
||
--error ER_LOCK_OR_ACTIVE_TRANSACTION
|
||
alter event e2 rename to e3;
|
||
--error ER_LOCK_OR_ACTIVE_TRANSACTION
|
||
drop event e2;
|
||
--error ER_LOCK_OR_ACTIVE_TRANSACTION
|
||
drop event e1;
|
||
unlock tables;
|
||
#
|
||
--error ER_WRONG_LOCK_OF_SYSTEM_TABLE
|
||
lock table t1 read, mysql.event write;
|
||
#
|
||
--error ER_WRONG_LOCK_OF_SYSTEM_TABLE
|
||
lock table t1 write, mysql.event write;
|
||
#
|
||
lock table mysql.event write;
|
||
--replace_regex /STARTS '[^']+'/STARTS '#'/
|
||
show create event e1;
|
||
select event_name from information_schema.events;
|
||
--error ER_LOCK_OR_ACTIVE_TRANSACTION
|
||
create event e2 on schedule every 10 hour do select 1;
|
||
--error ER_LOCK_OR_ACTIVE_TRANSACTION
|
||
alter event e2 disable;
|
||
--error ER_LOCK_OR_ACTIVE_TRANSACTION
|
||
alter event e2 rename to e3;
|
||
--error ER_LOCK_OR_ACTIVE_TRANSACTION
|
||
drop event e3;
|
||
--error ER_LOCK_OR_ACTIVE_TRANSACTION
|
||
drop event e1;
|
||
unlock tables;
|
||
drop event e1;
|
||
--echo Make sure we have left no events
|
||
select event_name from information_schema.events;
|
||
--echo
|
||
--echo Events in sub-statements, events and prelocking
|
||
--echo
|
||
--echo
|
||
create event e1 on schedule every 10 hour do select 1;
|
||
delimiter |;
|
||
--error ER_SP_NO_RETSET
|
||
create function f1() returns int
|
||
begin
|
||
show create event e1;
|
||
return 1;
|
||
end|
|
||
--error ER_SP_NO_RETSET
|
||
create trigger trg before insert on t1 for each row
|
||
begin
|
||
show create event e1;
|
||
end|
|
||
--error ER_SP_NO_RETSET
|
||
create function f1() returns int
|
||
begin
|
||
select event_name from information_schema.events;
|
||
return 1;
|
||
end|
|
||
--error ER_SP_NO_RETSET
|
||
create trigger trg before insert on t1 for each row
|
||
begin
|
||
select event_name from information_schema.events;
|
||
end|
|
||
--error ER_EVENT_RECURSION_FORBIDDEN
|
||
create function f1() returns int
|
||
begin
|
||
create event e2 on schedule every 10 hour do select 1;
|
||
return 1;
|
||
end|
|
||
--error ER_COMMIT_NOT_ALLOWED_IN_SF_OR_TRG
|
||
create function f1() returns int
|
||
begin
|
||
alter event e1 rename to e2;
|
||
return 1;
|
||
end|
|
||
--error ER_COMMIT_NOT_ALLOWED_IN_SF_OR_TRG
|
||
create function f1() returns int
|
||
begin
|
||
drop event e2;
|
||
return 1;
|
||
end|
|
||
--echo ----------------------------------------------------------------------
|
||
create trigger trg before insert on t1 for each row
|
||
begin
|
||
set new.a= f1();
|
||
end|
|
||
create function f1() returns int
|
||
begin
|
||
call p1();
|
||
return 0;
|
||
end|
|
||
create procedure p1()
|
||
begin
|
||
select event_name from information_schema.events;
|
||
end|
|
||
--error ER_SP_NO_RETSET
|
||
insert into t1 (a) values (1)|
|
||
drop procedure p1|
|
||
create procedure p1()
|
||
begin
|
||
show create event e1;
|
||
end|
|
||
--error ER_SP_NO_RETSET
|
||
insert into t1 (a) values (1)|
|
||
drop procedure p1|
|
||
create procedure p1()
|
||
begin
|
||
create temporary table tmp select event_name from information_schema.events;
|
||
end|
|
||
--echo expected to work, since we redirect the output into a tmp table
|
||
insert into t1 (a) values (1)|
|
||
select * from tmp|
|
||
drop temporary table tmp|
|
||
drop procedure p1|
|
||
create procedure p1()
|
||
begin
|
||
alter event e1 rename to e2;
|
||
end|
|
||
--error ER_COMMIT_NOT_ALLOWED_IN_SF_OR_TRG
|
||
insert into t1 (a) values (1)|
|
||
drop procedure p1|
|
||
create procedure p1()
|
||
begin
|
||
drop event e1;
|
||
end|
|
||
--error ER_COMMIT_NOT_ALLOWED_IN_SF_OR_TRG
|
||
insert into t1 (a) values (1)|
|
||
drop table t1|
|
||
drop event e1|
|
||
delimiter ;|
|
||
|
||
#
|
||
# Bug#21432 Database/Table name limited to 64 bytes, not chars, problems with multi-byte
|
||
#
|
||
set names utf8;
|
||
create event имя_события_в_кодировке_утф8_длиной_больше_чем_48 on schedule every 2 year do select 1;
|
||
select EVENT_NAME from information_schema.events
|
||
where event_schema='test';
|
||
drop event имя_события_в_кодировке_утф8_длиной_больше_чем_48;
|
||
--error 1059
|
||
create event
|
||
очень_очень_очень_очень_очень_очень_очень_очень_длинная_строка_66
|
||
on schedule every 2 year do select 1;
|
||
|
||
#
|
||
# Bug#35981: ALTER EVENT causes the server to change the PRESERVE option.
|
||
#
|
||
|
||
create event event_35981 on schedule every 6 month on completion preserve
|
||
disable
|
||
do
|
||
select 1;
|
||
|
||
echo The following SELECTs should all give 1;
|
||
|
||
# show current ON_COMPLETION
|
||
select count(*) from information_schema.events
|
||
where event_schema = database() and event_name = 'event_35981' and
|
||
on_completion = 'PRESERVE';
|
||
|
||
# show ON_COMPLETION remains "PRESERVE" when not given in ALTER EVENT
|
||
alter event event_35981 enable;
|
||
select count(*) from information_schema.events
|
||
where event_schema = database() and event_name = 'event_35981' and
|
||
on_completion = 'PRESERVE';
|
||
|
||
# show we can change ON_COMPLETION
|
||
alter event event_35981 on completion not preserve;
|
||
select count(*) from information_schema.events
|
||
where event_schema = database() and event_name = 'event_35981' and
|
||
on_completion = 'NOT PRESERVE';
|
||
|
||
# show ON_COMPLETION remains "NOT PRESERVE" when not given in ALTER EVENT
|
||
alter event event_35981 disable;
|
||
select count(*) from information_schema.events
|
||
where event_schema = database() and event_name = 'event_35981' and
|
||
on_completion = 'NOT PRESERVE';
|
||
|
||
# show we can change ON_COMPLETION
|
||
alter event event_35981 on completion preserve;
|
||
select count(*) from information_schema.events
|
||
where event_schema = database() and event_name = 'event_35981' and
|
||
on_completion = 'PRESERVE';
|
||
|
||
|
||
drop event event_35981;
|
||
|
||
create event event_35981 on schedule every 6 month disable
|
||
do
|
||
select 1;
|
||
|
||
# show that the defaults for CREATE EVENT are still correct (NOT PRESERVE)
|
||
select count(*) from information_schema.events
|
||
where event_schema = database() and event_name = 'event_35981' and
|
||
on_completion = 'NOT PRESERVE';
|
||
|
||
drop event event_35981;
|
||
|
||
|
||
# show that backdating doesn't break
|
||
|
||
create event event_35981 on schedule every 1 hour starts current_timestamp
|
||
on completion not preserve
|
||
do
|
||
select 1;
|
||
|
||
# should fail thanks to above's NOT PRESERVE
|
||
--error ER_EVENT_CANNOT_ALTER_IN_THE_PAST
|
||
alter event event_35981 on schedule every 1 hour starts '1999-01-01 00:00:00'
|
||
ends '1999-01-02 00:00:00';
|
||
|
||
drop event event_35981;
|
||
|
||
create event event_35981 on schedule every 1 hour starts current_timestamp
|
||
on completion not preserve
|
||
do
|
||
select 1;
|
||
|
||
# succeed with warning
|
||
alter event event_35981 on schedule every 1 hour starts '1999-01-01 00:00:00'
|
||
ends '1999-01-02 00:00:00' on completion preserve;
|
||
|
||
drop event event_35981;
|
||
|
||
|
||
|
||
create event event_35981 on schedule every 1 hour starts current_timestamp
|
||
on completion preserve
|
||
do
|
||
select 1;
|
||
|
||
# this should succeed thanks to above PRESERVE! give a warning though.
|
||
alter event event_35981 on schedule every 1 hour starts '1999-01-01 00:00:00'
|
||
ends '1999-01-02 00:00:00';
|
||
|
||
# this should fail, as the event would have passed already
|
||
--error ER_EVENT_CANNOT_ALTER_IN_THE_PAST
|
||
alter event event_35981 on schedule every 1 hour starts '1999-01-01 00:00:00'
|
||
ends '1999-01-02 00:00:00' on completion not preserve;
|
||
|
||
# should succeed giving a warning
|
||
alter event event_35981 on schedule every 1 hour starts '1999-01-01 00:00:00'
|
||
ends '1999-01-02 00:00:00' on completion preserve;
|
||
|
||
drop event event_35981;
|
||
|
||
#
|
||
# End of tests
|
||
#
|
||
|
||
let $wait_condition=
|
||
select count(*) = 0 from information_schema.processlist
|
||
where db='events_test' and command = 'Connect' and user=current_user();
|
||
--source include/wait_condition.inc
|
||
|
||
drop database events_test;
|