mirror of
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6ddd01c27a
condition variable per context instead of one mutex and one conditional variable for the whole subsystem. This should increase concurrency in this subsystem. It also opens the way for further changes which are necessary to solve such bugs as bug #46272 "MySQL 5.4.4, new MDL: unnecessary deadlock" and bug #37346 "innodb does not detect deadlock between update and alter table". Two other notable changes done by this patch: - MDL subsystem no longer implicitly acquires global intention exclusive metadata lock when per-object metadata lock is acquired. Now this has to be done by explicit calls outside of MDL subsystem. - Instead of using separate MDL_context for opening system tables/tables for purposes of I_S we now create MDL savepoint in the main context before opening tables and rollback to this savepoint after closing them. This means that it is now possible to get ER_LOCK_DEADLOCK error even not inside a transaction. This might happen in unlikely case when one runs DDL on one of system tables while also running DDL on some other tables. Cases when this ER_LOCK_DEADLOCK error is not justified will be addressed by advanced deadlock detector for MDL subsystem which we plan to implement. mysql-test/include/handler.inc: Adjusted handler_myisam.test and handler_innodb.test to the fact that exclusive metadata locks on tables are now acquired according to alphabetical order of fully qualified table names instead of order in which tables are mentioned in statement. mysql-test/r/handler_innodb.result: Adjusted handler_myisam.test and handler_innodb.test to the fact that exclusive metadata locks on tables are now acquired according to alphabetical order of fully qualified table names instead of order in which tables are mentioned in statement. mysql-test/r/handler_myisam.result: Adjusted handler_myisam.test and handler_innodb.test to the fact that exclusive metadata locks on tables are now acquired according to alphabetical order of fully qualified table names instead of order in which tables are mentioned in statement. mysql-test/r/mdl_sync.result: Adjusted mdl_sync.test to the fact that exclusive metadata locks on tables are now acquired according to alphabetical order of fully qualified table names instead of order in which tables are mentioned in statement. mysql-test/t/mdl_sync.test: Adjusted mdl_sync.test to the fact that exclusive metadata locks on tables are now acquired according to alphabetical order of fully qualified table names instead of order in which tables are mentioned in statement. sql/events.cc: Instead of using separate MDL_context for opening system tables we now create MDL savepoint in the main context before opening such tables and rollback to this savepoint after closing them. To support this change methods of THD responsible for saving/restoring open table state were changed to use Open_tables_backup class which in addition to Open_table_state has a member for this savepoint. As result code opening/closing system tables was changed to use Open_tables_backup instead of Open_table_state class as well. sql/ha_ndbcluster.cc: Since manipulations with open table state no longer install proxy MDL_context it does not make sense to perform them in order to satisfy assert in mysql_rm_tables_part2(). Removed them per agreement with Cluster team. This has not broken test suite since scenario in which deadlock can occur and assertion fails is not covered by tests. sql/lock.cc: MDL subsystem no longer implicitly acquires global intention exclusive metadata lock when per-object exclusive metadata lock is acquired. Now this has to be done by explicit calls outside of MDL subsystem. sql/log.cc: Instead of using separate MDL_context for opening system tables we now create MDL savepoint in the main context before opening such tables and rollback to this savepoint after closing them. To support this change methods of THD responsible for saving/restoring open table state were changed to use Open_tables_backup class which in addition to Open_table_state has a member for this savepoint. As result code opening/closing system tables was changed to use Open_tables_backup instead of Open_table_state class as well. sql/mdl.cc: Changed metadata locking subsystem to use mutex per lock and condition variable per context instead of one mutex and one conditional variable for the whole subsystem. Changed approach to handling of global metadata locks. Instead of implicitly acquiring intention exclusive locks when user requests per-object upgradeable or exclusive locks now we require them to be acquired explicitly in the same way as ordinary metadata locks. In fact global lock are now ordinary metadata locks in new GLOBAL namespace. To implement these changes: - Removed LOCK_mdl mutex and COND_mdl condition variable. - Introduced MDL_lock::m_mutex mutexes which protect individual lock objects. - Replaced mdl_locks hash with MDL_map class, which has hash for MDL_lock objects as a member and separate mutex which protects this hash. Methods of this class allow to find(), find_or_create() or remove() MDL_lock objects in concurrency-friendly fashion (i.e. for most common operation, find_or_create(), we don't acquire MDL_lock::m_mutex while holding MDL_map::m_mutex. Thanks to MikaelR for this idea and benchmarks!). Added three auxiliary members to MDL_lock class (m_is_destroyed, m_ref_usage, m_ref_release) to support this concurrency-friendly behavior. - Introduced MDL_context::m_ctx_wakeup_cond condition variable to be used for waiting until this context's pending request can be satisfied or its thread has to perform actions to resolve potential deadlock. Context which want to wait add ticket corresponding to the request to an appropriate queue of waiters in MDL_lock object so they can be noticed when other contexts change state of lock and be awaken by them by signalling on MDL_context::m_ctx_wakeup_cond. As consequence MDL_ticket objects has to be used for any waiting in metadata locking subsystem including one which happens in MDL_context::wait_for_locks() method. Another consequence is that MDL_context is no longer copyable and can't be saved/restored when working with system tables. - Made MDL_lock an abstract class, which delegates specifying exact compatibility matrix to its descendants. Added MDL_global_lock child class for global lock (The old is_lock_type_compatible() method became can_grant_lock() method of this class). Added MDL_object_lock class to represent per-object lock (The old MDL_lock::can_grant_lock() became its method). Choice between two classes happens based on MDL namespace in MDL_lock::create() method. - Got rid of MDL_lock::type member as its meaning became ambigous for global locks. - To simplify waking up of contexts waiting for lock split waiting queue in MDL_lock class in two queues. One for pending requests for exclusive (including intention exclusive) locks and another for requests for shared locks. - Added virtual wake_up_waiters() method to MDL_lock, MDL_global_lock and MDL_object_lock classes which allows to wake up waiting contexts after state of lock changes. Replaced old duplicated code with calls to this method. - Adjusted MDL_context::try_acquire_shared_lock()/exclusive_lock()/ global_shared_lock(), MDL_ticket::upgrade_shared_lock_to_exclusive_lock() and MDL_context::release_ticket() methods to use MDL_map and MDL_lock::m_mutex instead of single LOCK_mdl mutex and wake up waiters according to the approach described above. The latter method also was renamed to MDL_context::release_lock(). - Changed MDL_context::try_acquire_shared_lock()/exclusive_lock() and release_lock() not to handle global locks. They are now supposed to be taken explicitly like ordinary metadata locks. - Added helper MDL_context::try_acquire_global_intention_exclusive_lock() and acquire_global_intention_exclusive_lock() methods. - Moved common code from MDL_context::acquire_global_shared_lock() and acquire_global_intention_exclusive_lock() to new method - MDL_context::acquire_lock_impl(). - Moved common code from MDL_context::try_acquire_shared_lock(), try_acquire_global_intention_exclusive_lock()/exclusive_lock() to MDL_context::try_acquire_lock_impl(). - Since acquiring of several exclusive locks can no longer happen under single LOCK_mdl mutex the approach to it had to be changed. Now we do it in one by one fashion. This is done in alphabetical order to avoid deadlocks. Changed MDL_context::acquire_exclusive_locks() accordingly (as part of this change moved code responsible for acquiring single exclusive lock to new MDL_context::acquire_exclusive_lock_impl() method). - Since we no longer have single LOCK_mdl mutex which protects all MDL_context::m_is_waiting_in_mdl members using these members to determine if we have really awaken context holding conflicting shared lock became inconvinient. Got rid of this member and changed notify_shared_lock() helper function and process of acquiring of/upgrading to exclusive lock not to rely on such information. Now in MDL_context::acquire_exclusive_lock_impl() and MDL_ticket::upgrade_shared_lock_to_exclusive_lock() we simply re-try to wake up threads holding conflicting shared locks after small time out. - Adjusted MDL_context::can_wait_lead_to_deadlock() and MDL_ticket::has_pending_conflicting_lock() to use per-lock mutexes instead of LOCK_mdl. To do this introduced MDL_lock::has_pending_exclusive_lock() method. sql/mdl.h: Changed metadata locking subsystem to use mutex per lock and condition variable per context instead of one mutex and one conditional variable for the whole subsystem. In order to implement this change: - Added MDL_key::cmp() method to be able to sort MDL_key objects alphabetically. Changed length fields in MDL_key class to uint16 as 16-bit is enough for length of any key. - Changed MDL_ticket::get_ctx() to return pointer to non-const object in order to be able to use MDL_context::awake() method for such contexts. - Got rid of unlocked versions of can_wait_lead_to_deadlock()/ has_pending_conflicting_lock() methods in MDL_context and MDL_ticket. We no longer has single mutex which protects all locks. Thus one always has to use versions of these methods which acquire per-lock mutexes. - MDL_request_list type of list now counts its elements. - Added MDL_context::m_ctx_wakeup_cond condition variable to be used for waiting until this context's pending request can be satisfied or its thread has to perform actions to resolve potential deadlock. Added awake() method to wake up context from such wait. Addition of condition variable made MDL_context uncopyable. As result we no longer can save/restore MDL_context when working with system tables. Instead we create MDL savepoint before opening those tables and rollback to it once they are closed. - MDL_context::release_ticket() became release_lock() method. - Added auxiliary MDL_context::acquire_exclusive_lock_impl() method which does all necessary work to acquire exclusive lock on one object but should not be used directly as it does not enforce any asserts ensuring that no deadlocks are possible. - Since we no longer need to know if thread trying to acquire exclusive lock managed to wake up any threads having conflicting shared locks (as, anyway, we will try to wake up such threads again shortly) - MDL_context::m_is_waiting_in_mdl member became unnecessary and notify_shared_lock() no longer needs to be friend of MDL_context. Changed approach to handling of global metadata locks. Instead of implicitly acquiring intention exclusive locks when user requests per-object upgradeable or exclusive locks now we require them to be acquired explicitly in the same way as ordinary metadata locks. - Added new GLOBAL namespace for such locks. - Added new type of lock to be requested MDL_INTENTION_EXCLISIVE. - Added MDL_context::try_acquire_global_intention_exclusive_lock() and acquire_global_intention_exclusive_lock() methods. - Moved common code from MDL_context::acquire_global_shared_lock() and acquire_global_intention_exclusive_lock() to new method - MDL_context::acquire_lock_impl(). - Moved common code from MDL_context::try_acquire_shared_lock(), try_acquire_global_intention_exclusive_lock()/exclusive_lock() to MDL_context::try_acquire_lock_impl(). - Added helper MDL_context::is_global_lock_owner() method to be able easily to find what kind of global lock this context holds. - MDL_context::m_has_global_shared_lock became unnecessary as global read lock is now represented by ordinary ticket. - Removed assert in MDL_context::set_lt_or_ha_sentinel() which became false for cases when we execute LOCK TABLES under global read lock mode. sql/mysql_priv.h: Instead of using separate MDL_context for opening system tables we now create MDL savepoint in the main context before opening such tables and rollback to this savepoint after closing them. To support this change methods of THD responsible for saving/restoring open table state were changed to use Open_tables_backup class which in addition to Open_table_state has a member for this savepoint. As result calls opening/closing system tables were changed to use Open_tables_backup instead of Open_table_state class as well. sql/sp.cc: Instead of using separate MDL_context for opening system tables we now create MDL savepoint in the main context before opening such tables and rollback to this savepoint after closing them. To support this change methods of THD responsible for saving/restoring open table state were changed to use Open_tables_backup class which in addition to Open_table_state has a member for this savepoint. As result code opening/closing system tables was changed to use Open_tables_backup instead of Open_table_state class as well. sql/sp.h: Instead of using separate MDL_context for opening system tables we now create MDL savepoint in the main context before opening such tables and rollback to this savepoint after closing them. To support this change methods of THD responsible for saving/restoring open table state were changed to use Open_tables_backup class which in addition to Open_table_state has a member for this savepoint. As result code opening/closing system tables was changed to use Open_tables_backup instead of Open_table_state class as well. sql/sql_base.cc: close_thread_tables(): Since we no longer use separate MDL_context for opening system tables we need to avoid releasing all transaction locks when closing system table. Releasing metadata lock on system table is now responsibility of THD::restore_backup_open_tables_state(). open_table_get_mdl_lock(), Open_table_context::recover_from_failed_open(): MDL subsystem no longer implicitly acquires global intention exclusive metadata lock when per-object upgradable or exclusive metadata lock is acquired. So this have to be done explicitly from these calls. Changed Open_table_context class to store MDL_request object for global intention exclusive lock acquired when opening tables. open_table(): Do not release metadata lock if we have failed to open table as this lock might have been acquired by one of previous statements in transaction, and therefore should not be released. open_system_tables_for_read()/close_system_tables()/ open_performance_schema_table(): Instead of using separate MDL_context for opening system tables we now create MDL savepoint in the main context before opening such tables and rollback to this savepoint after closing them. To support this change methods of THD responsible for saving/restoring open table state were changed to use Open_tables_backup class which in addition to Open_table_state has a member for this savepoint. As result code opening/closing system tables was changed to use Open_tables_backup instead of Open_table_state class as well. close_performance_schema_table(): Got rid of duplicated code. sql/sql_class.cc: Instead of using separate MDL_context for opening system tables we now create MDL savepoint in the main context before opening such tables and rollback to this savepoint after closing them. To support this change methods of THD responsible for saving/restoring open table state were changed to use Open_tables_backup class which in addition to Open_table_state has a member for this savepoint. Also releasing metadata lock on system table is now responsibility of THD::restore_backup_open_tables_state(). Adjusted assert in THD::cleanup() to take into account fact that now we also use MDL sentinel for global read lock. sql/sql_class.h: Instead of using separate MDL_context for opening system tables we now create MDL savepoint in the main context before opening such tables and rollback to this savepoint after closing them. As result: - 'mdl_context' member was moved out of Open_tables_state to THD class. enter_locked_tables_mode()/leave_locked_tables_mode() had to follow. - Methods of THD responsible for saving/restoring open table state were changed to use Open_tables_backup class which in addition to Open_table_state has a member for this savepoint. Changed Open_table_context class to store MDL_request object for global intention exclusive lock acquired when opening tables. sql/sql_delete.cc: MDL subsystem no longer implicitly acquires global intention exclusive metadata lock when per-object exclusive metadata lock is acquired. Now this has to be done by explicit calls outside of MDL subsystem. sql/sql_help.cc: Instead of using separate MDL_context for opening system tables we now create MDL savepoint in the main context before opening such tables and rollback to this savepoint after closing them. To support this change methods of THD responsible for saving/restoring open table state were changed to use Open_tables_backup class which in addition to Open_table_state has a member for this savepoint. As result code opening/closing system tables was changed to use Open_tables_backup instead of Open_table_state class as well. sql/sql_parse.cc: Adjusted assert reload_acl_and_cache() to the fact that global read lock now takes full-blown metadata lock. sql/sql_plist.h: Added support for element counting to I_P_List list template. One can use policy classes to specify if such counting is needed or not needed for particular list. sql/sql_show.cc: Instead of using separate MDL_context for opening tables for I_S purposes we now create MDL savepoint in the main context before opening tables and rollback to this savepoint after closing them. To support this and similar change for system tables methods of THD responsible for saving/restoring open table state were changed to use Open_tables_backup class which in addition to Open_table_state has a member for this savepoint. As result code opening/closing tables for I_S purposes was changed to use Open_tables_backup instead of Open_table_state class as well. sql/sql_table.cc: mysql_rm_tables_part2(): Since now global intention exclusive metadata lock is ordinary metadata lock we no longer can rely that by releasing MDL locks on all tables we will release all locks acquired by this routine. So in non-LOCK-TABLES mode we have to release all locks acquired explicitly. prepare_for_repair(), mysql_alter_table(): MDL subsystem no longer implicitly acquires global intention exclusive metadata lock when per-object exclusive metadata lock is acquired. Now this has to be done by explicit calls outside of MDL subsystem. sql/tztime.cc: Instead of using separate MDL_context for opening system tables we now create MDL savepoint in the main context before opening such tables and rollback to this savepoint after closing them. To support this change methods of THD responsible for saving/restoring open table state were changed to use Open_tables_backup class which in addition to Open_table_state has a member for this savepoint. As result code opening/closing system tables was changed to use Open_tables_backup instead of Open_table_state class as well. Also changed code not to use special mechanism for open system tables when it is not really necessary.
1339 lines
30 KiB
Text
1339 lines
30 KiB
Text
SET SESSION STORAGE_ENGINE = MyISAM;
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drop table if exists t1,t3,t4,t5;
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create table t1 (a int, b char(10), key a(a), key b(a,b));
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insert into t1 values
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(17,"ddd"),(18,"eee"),(19,"fff"),(19,"yyy"),
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(14,"aaa"),(15,"bbb"),(16,"ccc"),(16,"xxx"),
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(20,"ggg"),(21,"hhh"),(22,"iii");
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handler t1 open as t2;
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handler t2 read a=(SELECT 1);
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ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'SELECT 1)' at line 1
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handler t2 read a first;
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a b
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14 aaa
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handler t2 read a next;
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a b
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15 bbb
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handler t2 read a next;
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a b
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16 ccc
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handler t2 read a prev;
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a b
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15 bbb
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handler t2 read a last;
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a b
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22 iii
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handler t2 read a prev;
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a b
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21 hhh
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handler t2 read a prev;
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a b
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20 ggg
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handler t2 read a first;
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a b
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14 aaa
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handler t2 read a prev;
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a b
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handler t2 read a last;
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a b
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22 iii
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handler t2 read a prev;
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a b
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21 hhh
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handler t2 read a next;
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a b
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22 iii
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handler t2 read a next;
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a b
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handler t2 read a=(15);
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a b
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15 bbb
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handler t2 read a=(16);
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a b
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16 ccc
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handler t2 read a=(19,"fff");
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ERROR 42000: Too many key parts specified; max 1 parts allowed
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handler t2 read b=(19,"fff");
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a b
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19 fff
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handler t2 read b=(19,"yyy");
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a b
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19 yyy
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handler t2 read b=(19);
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a b
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19 fff
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handler t1 read a last;
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ERROR 42S02: Unknown table 't1' in HANDLER
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handler t2 read a=(11);
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a b
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handler t2 read a>=(11);
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a b
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14 aaa
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handler t2 read a=(18);
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a b
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18 eee
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handler t2 read a>=(18);
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a b
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18 eee
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handler t2 read a>(18);
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a b
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19 fff
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handler t2 read a<=(18);
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a b
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18 eee
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handler t2 read a<(18);
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a b
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17 ddd
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handler t2 read a first limit 5;
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a b
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14 aaa
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15 bbb
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16 ccc
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16 xxx
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17 ddd
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handler t2 read a next limit 3;
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a b
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18 eee
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19 fff
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19 yyy
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handler t2 read a prev limit 10;
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a b
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19 fff
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18 eee
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17 ddd
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16 xxx
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16 ccc
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15 bbb
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14 aaa
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handler t2 read a>=(16) limit 4;
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a b
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16 ccc
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16 xxx
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17 ddd
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18 eee
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handler t2 read a>=(16) limit 2,2;
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a b
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17 ddd
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18 eee
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handler t2 read a last limit 3;
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a b
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22 iii
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21 hhh
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20 ggg
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handler t2 read a=(19);
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a b
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19 fff
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handler t2 read a=(19) where b="yyy";
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a b
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19 yyy
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handler t2 read first;
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a b
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17 ddd
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handler t2 read next;
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a b
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18 eee
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handler t2 read next;
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a b
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19 fff
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handler t2 read last;
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ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1
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handler t2 close;
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handler t1 open;
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handler t1 read a next;
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a b
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14 aaa
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handler t1 read a next;
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a b
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15 bbb
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handler t1 close;
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handler t1 open;
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handler t1 read a prev;
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a b
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22 iii
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handler t1 read a prev;
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a b
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21 hhh
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handler t1 close;
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handler t1 open as t2;
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handler t2 read first;
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a b
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17 ddd
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alter table t1 engine = MyISAM;
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handler t2 read first;
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ERROR 42S02: Unknown table 't2' in HANDLER
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handler t1 open as t2;
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drop table t1;
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create table t1 (a int);
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insert into t1 values (17);
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handler t2 read first;
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ERROR 42S02: Unknown table 't2' in HANDLER
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handler t1 open as t2;
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alter table t1 engine=MEMORY;
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handler t2 read first;
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ERROR 42S02: Unknown table 't2' in HANDLER
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drop table t1;
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create table t1 (a int);
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insert into t1 values (1),(2),(3),(4),(5),(6);
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delete from t1 limit 2;
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handler t1 open;
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handler t1 read first;
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a
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3
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handler t1 read first limit 1,1;
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a
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4
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handler t1 read first limit 2,2;
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a
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5
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6
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delete from t1 limit 3;
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handler t1 read first;
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a
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6
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drop table t1;
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create table t1(a int, index(a));
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insert into t1 values (1), (2), (3);
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handler t1 open;
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handler t1 read a=(W);
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ERROR 42S22: Unknown column 'W' in 'field list'
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handler t1 read a=(a);
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ERROR HY000: Incorrect arguments to HANDLER ... READ
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drop table t1;
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create table t1 (a char(5));
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insert into t1 values ("Ok");
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handler t1 open as t;
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handler t read first;
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a
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Ok
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use mysql;
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handler t read first;
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a
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Ok
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handler t close;
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handler test.t1 open as t;
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handler t read first;
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a
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Ok
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handler t close;
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use test;
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drop table t1;
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create table t1 ( a int, b int, INDEX a (a) );
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insert into t1 values (1,2), (2,1);
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handler t1 open;
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handler t1 read a=(1) where b=2;
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a b
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1 2
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handler t1 read a=(1) where b=3;
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a b
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handler t1 read a=(1) where b=1;
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a b
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handler t1 close;
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drop table t1;
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drop database if exists test_test;
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create database test_test;
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use test_test;
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create table t1(table_id char(20) primary key);
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insert into t1 values ('test_test.t1');
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insert into t1 values ('');
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handler t1 open;
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handler t1 read first limit 9;
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table_id
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test_test.t1
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create table t2(table_id char(20) primary key);
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insert into t2 values ('test_test.t2');
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insert into t2 values ('');
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handler t2 open;
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handler t2 read first limit 9;
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table_id
|
|
test_test.t2
|
|
|
|
use test;
|
|
drop table if exists t1;
|
|
create table t1(table_id char(20) primary key);
|
|
insert into t1 values ('test.t1');
|
|
insert into t1 values ('');
|
|
handler t1 open;
|
|
ERROR 42000: Not unique table/alias: 't1'
|
|
use test;
|
|
handler test.t1 read first limit 9;
|
|
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'read first limit 9' at line 1
|
|
handler test_test.t1 read first limit 9;
|
|
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'read first limit 9' at line 1
|
|
handler t1 read first limit 9;
|
|
table_id
|
|
test_test.t1
|
|
|
|
handler test_test.t2 read first limit 9;
|
|
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'read first limit 9' at line 1
|
|
handler t2 read first limit 9;
|
|
table_id
|
|
test_test.t2
|
|
|
|
handler test_test.t1 close;
|
|
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'close' at line 1
|
|
handler t1 close;
|
|
drop table test_test.t1;
|
|
handler test_test.t2 close;
|
|
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'close' at line 1
|
|
handler t2 close;
|
|
drop table test_test.t2;
|
|
drop database test_test;
|
|
use test;
|
|
handler test.t1 close;
|
|
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'close' at line 1
|
|
handler t1 close;
|
|
ERROR 42S02: Unknown table 't1' in HANDLER
|
|
drop table test.t1;
|
|
drop database if exists test_test;
|
|
drop table if exists t1;
|
|
drop table if exists t2;
|
|
drop table if exists t3;
|
|
create database test_test;
|
|
use test_test;
|
|
create table t1 (c1 char(20));
|
|
insert into t1 values ('test_test.t1');
|
|
create table t3 (c1 char(20));
|
|
insert into t3 values ('test_test.t3');
|
|
handler t1 open;
|
|
handler t1 read first limit 9;
|
|
c1
|
|
test_test.t1
|
|
handler t1 open h1;
|
|
handler h1 read first limit 9;
|
|
c1
|
|
test_test.t1
|
|
use test;
|
|
create table t1 (c1 char(20));
|
|
create table t2 (c1 char(20));
|
|
create table t3 (c1 char(20));
|
|
insert into t1 values ('t1');
|
|
insert into t2 values ('t2');
|
|
insert into t3 values ('t3');
|
|
handler t1 open;
|
|
ERROR 42000: Not unique table/alias: 't1'
|
|
handler t2 open t1;
|
|
ERROR 42000: Not unique table/alias: 't1'
|
|
handler t3 open t1;
|
|
ERROR 42000: Not unique table/alias: 't1'
|
|
handler t1 read first limit 9;
|
|
c1
|
|
test_test.t1
|
|
handler test.t1 close;
|
|
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'close' at line 1
|
|
handler test.t1 open h1;
|
|
ERROR 42000: Not unique table/alias: 'h1'
|
|
handler test_test.t1 open h1;
|
|
ERROR 42000: Not unique table/alias: 'h1'
|
|
handler test_test.t3 open h3;
|
|
handler test.t1 open h2;
|
|
handler t1 read first limit 9;
|
|
c1
|
|
test_test.t1
|
|
handler h1 read first limit 9;
|
|
c1
|
|
test_test.t1
|
|
handler h2 read first limit 9;
|
|
c1
|
|
t1
|
|
handler h3 read first limit 9;
|
|
c1
|
|
test_test.t3
|
|
handler h2 read first limit 9;
|
|
c1
|
|
t1
|
|
handler test.h1 close;
|
|
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'close' at line 1
|
|
handler t1 close;
|
|
handler h1 close;
|
|
handler h2 close;
|
|
handler t1 read first limit 9;
|
|
ERROR 42S02: Unknown table 't1' in HANDLER
|
|
handler h1 read first limit 9;
|
|
ERROR 42S02: Unknown table 'h1' in HANDLER
|
|
handler h2 read first limit 9;
|
|
ERROR 42S02: Unknown table 'h2' in HANDLER
|
|
handler h3 read first limit 9;
|
|
c1
|
|
test_test.t3
|
|
handler h3 read first limit 9;
|
|
c1
|
|
test_test.t3
|
|
use test_test;
|
|
handler h3 read first limit 9;
|
|
c1
|
|
test_test.t3
|
|
handler test.h3 read first limit 9;
|
|
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'read first limit 9' at line 1
|
|
handler h3 close;
|
|
use test;
|
|
drop table t3;
|
|
drop table t2;
|
|
drop table t1;
|
|
drop database test_test;
|
|
create table t1 (c1 char(20));
|
|
insert into t1 values ("t1");
|
|
handler t1 open as h1;
|
|
handler h1 read first limit 9;
|
|
c1
|
|
t1
|
|
create table t2 (c1 char(20));
|
|
insert into t2 values ("t2");
|
|
handler t2 open as h2;
|
|
handler h2 read first limit 9;
|
|
c1
|
|
t2
|
|
create table t3 (c1 char(20));
|
|
insert into t3 values ("t3");
|
|
handler t3 open as h3;
|
|
handler h3 read first limit 9;
|
|
c1
|
|
t3
|
|
create table t4 (c1 char(20));
|
|
insert into t4 values ("t4");
|
|
handler t4 open as h4;
|
|
handler h4 read first limit 9;
|
|
c1
|
|
t4
|
|
create table t5 (c1 char(20));
|
|
insert into t5 values ("t5");
|
|
handler t5 open as h5;
|
|
handler h5 read first limit 9;
|
|
c1
|
|
t5
|
|
alter table t1 engine=MyISAM;
|
|
handler h1 read first limit 9;
|
|
ERROR 42S02: Unknown table 'h1' in HANDLER
|
|
handler h2 read first limit 9;
|
|
c1
|
|
t2
|
|
handler h3 read first limit 9;
|
|
c1
|
|
t3
|
|
handler h4 read first limit 9;
|
|
c1
|
|
t4
|
|
handler h5 read first limit 9;
|
|
c1
|
|
t5
|
|
alter table t5 engine=MyISAM;
|
|
handler h1 read first limit 9;
|
|
ERROR 42S02: Unknown table 'h1' in HANDLER
|
|
handler h2 read first limit 9;
|
|
c1
|
|
t2
|
|
handler h3 read first limit 9;
|
|
c1
|
|
t3
|
|
handler h4 read first limit 9;
|
|
c1
|
|
t4
|
|
handler h5 read first limit 9;
|
|
ERROR 42S02: Unknown table 'h5' in HANDLER
|
|
alter table t3 engine=MyISAM;
|
|
handler h1 read first limit 9;
|
|
ERROR 42S02: Unknown table 'h1' in HANDLER
|
|
handler h2 read first limit 9;
|
|
c1
|
|
t2
|
|
handler h3 read first limit 9;
|
|
ERROR 42S02: Unknown table 'h3' in HANDLER
|
|
handler h4 read first limit 9;
|
|
c1
|
|
t4
|
|
handler h5 read first limit 9;
|
|
ERROR 42S02: Unknown table 'h5' in HANDLER
|
|
handler h2 close;
|
|
handler h4 close;
|
|
handler t1 open as h1_1;
|
|
handler t1 open as h1_2;
|
|
handler t1 open as h1_3;
|
|
handler h1_1 read first limit 9;
|
|
c1
|
|
t1
|
|
handler h1_2 read first limit 9;
|
|
c1
|
|
t1
|
|
handler h1_3 read first limit 9;
|
|
c1
|
|
t1
|
|
alter table t1 engine=MyISAM;
|
|
handler h1_1 read first limit 9;
|
|
ERROR 42S02: Unknown table 'h1_1' in HANDLER
|
|
handler h1_2 read first limit 9;
|
|
ERROR 42S02: Unknown table 'h1_2' in HANDLER
|
|
handler h1_3 read first limit 9;
|
|
ERROR 42S02: Unknown table 'h1_3' in HANDLER
|
|
drop table t1;
|
|
drop table t2;
|
|
drop table t3;
|
|
drop table t4;
|
|
drop table t5;
|
|
create table t1 (c1 int);
|
|
insert into t1 values (1);
|
|
handler t1 open;
|
|
handler t1 read first;
|
|
c1
|
|
1
|
|
send the below to another connection, do not wait for the result
|
|
optimize table t1;
|
|
proceed with the normal connection
|
|
handler t1 read next;
|
|
c1
|
|
1
|
|
handler t1 close;
|
|
read the result from the other connection
|
|
Table Op Msg_type Msg_text
|
|
test.t1 optimize status OK
|
|
proceed with the normal connection
|
|
drop table t1;
|
|
CREATE TABLE t1 ( no1 smallint(5) NOT NULL default '0', no2 int(10) NOT NULL default '0', PRIMARY KEY (no1,no2));
|
|
INSERT INTO t1 VALUES (1,274),(1,275),(2,6),(2,8),(4,1),(4,2);
|
|
HANDLER t1 OPEN;
|
|
HANDLER t1 READ `primary` = (1, 1000);
|
|
no1 no2
|
|
HANDLER t1 READ `primary` PREV;
|
|
no1 no2
|
|
1 275
|
|
DROP TABLE t1;
|
|
create table t1 (c1 int);
|
|
insert into t1 values (14397);
|
|
flush tables with read lock;
|
|
drop table t1;
|
|
ERROR HY000: Can't execute the query because you have a conflicting read lock
|
|
send the below to another connection, do not wait for the result
|
|
drop table t1;
|
|
proceed with the normal connection
|
|
select * from t1;
|
|
c1
|
|
14397
|
|
unlock tables;
|
|
read the result from the other connection
|
|
proceed with the normal connection
|
|
select * from t1;
|
|
ERROR 42S02: Table 'test.t1' doesn't exist
|
|
drop table if exists t1;
|
|
Warnings:
|
|
Note 1051 Unknown table 't1'
|
|
drop table if exists t1;
|
|
create table t1 (a int) ENGINE=MEMORY;
|
|
--> client 2
|
|
handler t1 open;
|
|
ERROR HY000: Table storage engine for 't1' doesn't have this option
|
|
--> client 1
|
|
drop table t1;
|
|
drop table if exists t1;
|
|
create table t1 (a int);
|
|
handler t1 open as t1_alias;
|
|
handler t1_alias read a next;
|
|
ERROR 42000: Key 'a' doesn't exist in table 't1_alias'
|
|
handler t1_alias READ a next where inexistent > 0;
|
|
ERROR 42S22: Unknown column 'inexistent' in 'field list'
|
|
handler t1_alias read a next;
|
|
ERROR 42000: Key 'a' doesn't exist in table 't1_alias'
|
|
handler t1_alias READ a next where inexistent > 0;
|
|
ERROR 42S22: Unknown column 'inexistent' in 'field list'
|
|
handler t1_alias close;
|
|
drop table t1;
|
|
drop table if exists t1,t2;
|
|
create table t1 (c1 int);
|
|
create table t2 (c1 int);
|
|
insert into t1 values (1);
|
|
insert into t2 values (2);
|
|
connection: default
|
|
handler t1 open;
|
|
handler t1 read first;
|
|
c1
|
|
1
|
|
connection: flush
|
|
flush tables;;
|
|
connection: waiter
|
|
connection: default
|
|
handler t2 open;
|
|
handler t2 read first;
|
|
c1
|
|
2
|
|
handler t1 read next;
|
|
c1
|
|
1
|
|
handler t1 close;
|
|
handler t2 close;
|
|
drop table t1,t2;
|
|
drop table if exists t1, t0;
|
|
create table t1 (c1 int);
|
|
connection: default
|
|
handler t1 open;
|
|
handler t1 read first;
|
|
c1
|
|
connection: flush
|
|
rename table t1 to t0;;
|
|
connection: waiter
|
|
connection: default
|
|
#
|
|
# RENAME placed two pending locks and waits.
|
|
# When HANDLER t0 OPEN does open_tables(), it calls
|
|
# mysql_ha_flush(), which in turn closes the open HANDLER for t1.
|
|
# RENAME TABLE gets unblocked. If it gets scheduled quickly
|
|
# and manages to complete before open_tables()
|
|
# of HANDLER t0 OPEN, open_tables() and therefore the whole
|
|
# HANDLER t0 OPEN succeeds. Otherwise open_tables()
|
|
# notices a pending or active exclusive metadata lock on t2
|
|
# and the whole HANDLER t0 OPEN fails with ER_LOCK_DEADLOCK
|
|
# error.
|
|
#
|
|
handler t0 open;
|
|
handler t0 close;
|
|
connection: flush
|
|
handler t1 read next;
|
|
ERROR 42S02: Unknown table 't1' in HANDLER
|
|
handler t1 close;
|
|
ERROR 42S02: Unknown table 't1' in HANDLER
|
|
drop table t0;
|
|
drop table if exists t1;
|
|
create temporary table t1 (a int, b char(1), key a(a), key b(a,b));
|
|
insert into t1 values (0,"a"),(1,"b"),(2,"c"),(3,"d"),(4,"e"),
|
|
(5,"f"),(6,"g"),(7,"h"),(8,"i"),(9,"j");
|
|
select a,b from t1;
|
|
a b
|
|
0 a
|
|
1 b
|
|
2 c
|
|
3 d
|
|
4 e
|
|
5 f
|
|
6 g
|
|
7 h
|
|
8 i
|
|
9 j
|
|
handler t1 open as a1;
|
|
handler a1 read a first;
|
|
a b
|
|
0 a
|
|
handler a1 read a next;
|
|
a b
|
|
1 b
|
|
handler a1 read a next;
|
|
a b
|
|
2 c
|
|
select a,b from t1;
|
|
ERROR HY000: Can't reopen table: 'a1'
|
|
handler a1 read a prev;
|
|
a b
|
|
1 b
|
|
handler a1 read a prev;
|
|
a b
|
|
0 a
|
|
handler a1 read a=(6) where b="g";
|
|
a b
|
|
6 g
|
|
handler a1 close;
|
|
select a,b from t1;
|
|
a b
|
|
0 a
|
|
1 b
|
|
2 c
|
|
3 d
|
|
4 e
|
|
5 f
|
|
6 g
|
|
7 h
|
|
8 i
|
|
9 j
|
|
handler t1 open as a2;
|
|
handler a2 read a first;
|
|
a b
|
|
0 a
|
|
handler a2 read a last;
|
|
a b
|
|
9 j
|
|
handler a2 read a prev;
|
|
a b
|
|
8 i
|
|
handler a2 close;
|
|
drop table t1;
|
|
drop table if exists t1,t2;
|
|
create table t1 (a int);
|
|
handler t1 open as t1_alias;
|
|
drop table t1;
|
|
create table t1 (a int);
|
|
handler t1 open as t1_alias;
|
|
flush tables;
|
|
drop table t1;
|
|
create table t1 (a int);
|
|
handler t1 open as t1_alias;
|
|
handler t1_alias close;
|
|
drop table t1;
|
|
create table t1 (a int);
|
|
handler t1 open as t1_alias;
|
|
handler t1_alias read first;
|
|
a
|
|
drop table t1;
|
|
handler t1_alias read next;
|
|
ERROR 42S02: Unknown table 't1_alias' in HANDLER
|
|
create table t1 (a int);
|
|
create temporary table t2 (a int, key(a));
|
|
handler t1 open as a1;
|
|
handler t2 open as a2;
|
|
handler a2 read a first;
|
|
a
|
|
drop table t1, t2;
|
|
handler a2 read a next;
|
|
ERROR 42S02: Unknown table 'a2' in HANDLER
|
|
handler a1 close;
|
|
ERROR 42S02: Unknown table 'a1' in HANDLER
|
|
create table t1 (a int, key(a));
|
|
create table t2 like t1;
|
|
handler t1 open as a1;
|
|
handler t2 open as a2;
|
|
handler a1 read a first;
|
|
a
|
|
handler a2 read a first;
|
|
a
|
|
alter table t1 add b int;
|
|
handler a1 close;
|
|
ERROR 42S02: Unknown table 'a1' in HANDLER
|
|
handler a2 close;
|
|
drop table t1, t2;
|
|
create table t1 (a int, key(a));
|
|
handler t1 open as a1;
|
|
handler a1 read a first;
|
|
a
|
|
rename table t1 to t2;
|
|
handler a1 read a first;
|
|
ERROR 42S02: Unknown table 'a1' in HANDLER
|
|
drop table t2;
|
|
create table t1 (a int, key(a));
|
|
create table t2 like t1;
|
|
handler t1 open as a1;
|
|
handler t2 open as a2;
|
|
handler a1 read a first;
|
|
a
|
|
handler a2 read a first;
|
|
a
|
|
optimize table t1;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 optimize status Table is already up to date
|
|
handler a1 close;
|
|
ERROR 42S02: Unknown table 'a1' in HANDLER
|
|
handler a2 close;
|
|
drop table t1, t2;
|
|
create table t1 (a int, b char(1), key a(a), key b(a,b));
|
|
insert into t1 values (0,"a"),(1,"b"),(2,"c"),(3,"d"),(4,"e"),
|
|
(5,"f"),(6,"g"),(7,"h"),(8,"i"),(9,"j");
|
|
handler t1 open;
|
|
handler t1 read a first;
|
|
a b
|
|
0 a
|
|
handler t1 read a next;
|
|
a b
|
|
1 b
|
|
flush tables;
|
|
handler t1 read a next;
|
|
a b
|
|
0 a
|
|
handler t1 read a next;
|
|
a b
|
|
1 b
|
|
flush tables with read lock;
|
|
handler t1 read a next;
|
|
a b
|
|
0 a
|
|
unlock tables;
|
|
drop table t1;
|
|
handler t1 read a next;
|
|
ERROR 42S02: Unknown table 't1' in HANDLER
|
|
drop table if exists t1;
|
|
create table t1 (a int, key a (a));
|
|
insert into t1 values (1);
|
|
handler t1 open;
|
|
alter table t1 engine=memory;
|
|
handler t1 read a next;
|
|
a
|
|
1
|
|
handler t1 close;
|
|
drop table t1;
|
|
USE information_schema;
|
|
HANDLER COLUMNS OPEN;
|
|
ERROR HY000: Incorrect usage of HANDLER OPEN and information_schema
|
|
USE test;
|
|
#
|
|
# Add test coverage for HANDLER and LOCK TABLES, HANDLER and DDL.
|
|
#
|
|
drop table if exists t1, t2, t3;
|
|
create table t1 (a int, key a (a));
|
|
insert into t1 (a) values (1), (2), (3), (4), (5);
|
|
create table t2 (a int, key a (a)) select * from t1;
|
|
create temporary table t3 (a int, key a (a)) select * from t2;
|
|
handler t1 open;
|
|
handler t2 open;
|
|
handler t3 open;
|
|
#
|
|
# LOCK TABLES implicitly closes all handlers.
|
|
#
|
|
lock table t3 read;
|
|
#
|
|
# No HANDLER sql is available under lock tables anyway.
|
|
#
|
|
handler t1 open;
|
|
ERROR HY000: Can't execute the given command because you have active locked tables or an active transaction
|
|
handler t1 read next;
|
|
ERROR HY000: Can't execute the given command because you have active locked tables or an active transaction
|
|
handler t2 close;
|
|
ERROR HY000: Can't execute the given command because you have active locked tables or an active transaction
|
|
handler t3 open;
|
|
ERROR HY000: Can't execute the given command because you have active locked tables or an active transaction
|
|
# After UNLOCK TABLES no handlers are around, they were
|
|
# implicitly closed.
|
|
unlock tables;
|
|
drop temporary table t3;
|
|
handler t1 read next;
|
|
ERROR 42S02: Unknown table 't1' in HANDLER
|
|
handler t2 close;
|
|
ERROR 42S02: Unknown table 't2' in HANDLER
|
|
handler t3 read next;
|
|
ERROR 42S02: Unknown table 't3' in HANDLER
|
|
#
|
|
# Other operations also implicitly close handler:
|
|
#
|
|
# TRUNCATE
|
|
#
|
|
handler t1 open;
|
|
truncate table t1;
|
|
handler t1 read next;
|
|
ERROR 42S02: Unknown table 't1' in HANDLER
|
|
handler t1 open;
|
|
#
|
|
# CREATE TRIGGER
|
|
#
|
|
create trigger t1_ai after insert on t1 for each row set @a=1;
|
|
handler t1 read next;
|
|
ERROR 42S02: Unknown table 't1' in HANDLER
|
|
#
|
|
# DROP TRIGGER
|
|
#
|
|
handler t1 open;
|
|
drop trigger t1_ai;
|
|
handler t1 read next;
|
|
ERROR 42S02: Unknown table 't1' in HANDLER
|
|
#
|
|
# ALTER TABLE
|
|
#
|
|
handler t1 open;
|
|
alter table t1 add column b int;
|
|
handler t1 read next;
|
|
ERROR 42S02: Unknown table 't1' in HANDLER
|
|
#
|
|
# ANALYZE TABLE
|
|
#
|
|
handler t1 open;
|
|
analyze table t1;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 analyze status Table is already up to date
|
|
handler t1 read next;
|
|
ERROR 42S02: Unknown table 't1' in HANDLER
|
|
#
|
|
# OPTIMIZE TABLE
|
|
#
|
|
handler t1 open;
|
|
optimize table t1;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 optimize status OK
|
|
handler t1 read next;
|
|
ERROR 42S02: Unknown table 't1' in HANDLER
|
|
#
|
|
# REPAIR TABLE
|
|
#
|
|
handler t1 open;
|
|
repair table t1;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 repair status OK
|
|
handler t1 read next;
|
|
ERROR 42S02: Unknown table 't1' in HANDLER
|
|
#
|
|
# DROP TABLE, naturally.
|
|
#
|
|
handler t1 open;
|
|
drop table t1;
|
|
handler t1 read next;
|
|
ERROR 42S02: Unknown table 't1' in HANDLER
|
|
create table t1 (a int, b int, key a (a)) select a from t2;
|
|
#
|
|
# RENAME TABLE, naturally
|
|
#
|
|
handler t1 open;
|
|
rename table t1 to t3;
|
|
handler t1 read next;
|
|
ERROR 42S02: Unknown table 't1' in HANDLER
|
|
#
|
|
# CREATE TABLE (even with IF NOT EXISTS clause,
|
|
# and the table exists).
|
|
#
|
|
handler t2 open;
|
|
create table if not exists t2 (a int);
|
|
Warnings:
|
|
Note 1050 Table 't2' already exists
|
|
handler t2 read next;
|
|
ERROR 42S02: Unknown table 't2' in HANDLER
|
|
rename table t3 to t1;
|
|
drop table t2;
|
|
#
|
|
# FLUSH TABLE doesn't close the table but loses the position
|
|
#
|
|
handler t1 open;
|
|
handler t1 read a prev;
|
|
b a
|
|
NULL 5
|
|
flush table t1;
|
|
handler t1 read a prev;
|
|
b a
|
|
NULL 5
|
|
handler t1 close;
|
|
#
|
|
# FLUSH TABLES WITH READ LOCK behaves like FLUSH TABLE.
|
|
#
|
|
handler t1 open;
|
|
handler t1 read a prev;
|
|
b a
|
|
NULL 5
|
|
flush tables with read lock;
|
|
handler t1 read a prev;
|
|
b a
|
|
NULL 5
|
|
handler t1 close;
|
|
unlock tables;
|
|
#
|
|
# Explore the effect of HANDLER locks on concurrent DDL
|
|
#
|
|
handler t1 open;
|
|
# Establishing auxiliary connections con1, con2, con3
|
|
# --> connection con1;
|
|
# Sending:
|
|
drop table t1 ;
|
|
# We can't use connection 'default' as wait_condition will
|
|
# autoclose handlers.
|
|
# --> connection con2
|
|
# Waitng for 'drop table t1' to get blocked...
|
|
# --> connection default
|
|
handler t1 read a prev;
|
|
b a
|
|
NULL 5
|
|
handler t1 read a prev;
|
|
b a
|
|
NULL 4
|
|
handler t1 close;
|
|
# --> connection con1
|
|
# Reaping 'drop table t1'...
|
|
# --> connection default
|
|
#
|
|
# Explore the effect of HANDLER locks in parallel with SELECT
|
|
#
|
|
create table t1 (a int, key a (a));
|
|
insert into t1 (a) values (1), (2), (3), (4), (5);
|
|
begin;
|
|
select * from t1;
|
|
a
|
|
1
|
|
2
|
|
3
|
|
4
|
|
5
|
|
handler t1 open;
|
|
handler t1 read a prev;
|
|
a
|
|
5
|
|
handler t1 read a prev;
|
|
a
|
|
4
|
|
handler t1 close;
|
|
# --> connection con1;
|
|
# Sending:
|
|
drop table t1 ;
|
|
# --> connection con2
|
|
# Waiting for 'drop table t1' to get blocked...
|
|
# --> connection default
|
|
# We can still use the table, it's part of the transaction
|
|
select * from t1;
|
|
a
|
|
1
|
|
2
|
|
3
|
|
4
|
|
5
|
|
# Such are the circumstances that t1 is a part of transaction,
|
|
# thus we can reopen it in the handler
|
|
handler t1 open;
|
|
# We can commit the transaction, it doesn't close the handler
|
|
# and doesn't let DROP to proceed.
|
|
commit;
|
|
handler t1 read a prev;
|
|
a
|
|
5
|
|
handler t1 read a prev;
|
|
a
|
|
4
|
|
handler t1 read a prev;
|
|
a
|
|
3
|
|
handler t1 close;
|
|
# --> connection con1
|
|
# Now drop can proceed
|
|
# Reaping 'drop table t1'...
|
|
# --> connection default
|
|
#
|
|
# Demonstrate that HANDLER locks and transaction locks
|
|
# reside in the same context, and we don't back-off
|
|
# when have transaction or handler locks.
|
|
#
|
|
create table t1 (a int, key a (a));
|
|
insert into t1 (a) values (1), (2), (3), (4), (5);
|
|
create table t0 (a int, key a (a));
|
|
insert into t0 (a) values (1), (2), (3), (4), (5);
|
|
begin;
|
|
select * from t1;
|
|
a
|
|
1
|
|
2
|
|
3
|
|
4
|
|
5
|
|
# --> connection con2
|
|
# Sending:
|
|
rename table t0 to t3, t1 to t0, t3 to t1;
|
|
# --> connection con1
|
|
# Waiting for 'rename table ...' to get blocked...
|
|
# --> connection default
|
|
handler t0 open;
|
|
ERROR 40001: Deadlock found when trying to get lock; try restarting transaction
|
|
select * from t0;
|
|
ERROR 40001: Deadlock found when trying to get lock; try restarting transaction
|
|
handler t1 open;
|
|
commit;
|
|
handler t1 close;
|
|
# --> connection con2
|
|
# Reaping 'rename table ...'...
|
|
# --> connection default
|
|
handler t1 open;
|
|
handler t1 read a prev;
|
|
a
|
|
5
|
|
handler t1 close;
|
|
drop table t0;
|
|
#
|
|
# Originally there was a deadlock error in this test.
|
|
# With implementation of deadlock detector
|
|
# we no longer deadlock, but block and wait on a lock.
|
|
# The HANDLER is auto-closed as soon as the connection
|
|
# sees a pending conflicting lock against it.
|
|
#
|
|
create table t2 (a int, key a (a));
|
|
handler t1 open;
|
|
# --> connection con1
|
|
lock tables t2 read;
|
|
# --> connection con2
|
|
# Sending 'drop table t2'...
|
|
drop table t2;
|
|
# --> connection con1
|
|
# Waiting for 'drop table t2' to get blocked...
|
|
# --> connection default
|
|
# Sending 'select * from t2'
|
|
select * from t2;
|
|
# --> connection con1
|
|
# Waiting for 'select * from t2' to get blocked...
|
|
unlock tables;
|
|
# --> connection con2
|
|
# Reaping 'drop table t2'...
|
|
# --> connection default
|
|
# Reaping 'select * from t2'
|
|
ERROR 42S02: Table 'test.t2' doesn't exist
|
|
handler t1 close;
|
|
#
|
|
# ROLLBACK TO SAVEPOINT releases transactional locks,
|
|
# but has no effect on open HANDLERs
|
|
#
|
|
create table t2 like t1;
|
|
create table t3 like t1;
|
|
begin;
|
|
# Have something before the savepoint
|
|
select * from t3;
|
|
a
|
|
savepoint sv;
|
|
handler t1 open;
|
|
handler t1 read a first;
|
|
a
|
|
1
|
|
handler t1 read a next;
|
|
a
|
|
2
|
|
select * from t2;
|
|
a
|
|
# --> connection con1
|
|
# Sending:
|
|
drop table t1;
|
|
# --> connection con2
|
|
# Sending:
|
|
drop table t2;
|
|
# --> connection default
|
|
# Let DROP TABLE statements sync in. We must use
|
|
# a separate connection for that, because otherwise SELECT
|
|
# will auto-close the HANDLERs, becaues there are pending
|
|
# exclusive locks against them.
|
|
# --> connection con3
|
|
# Waiting for 'drop table t1' to get blocked...
|
|
# Waiting for 'drop table t2' to get blocked...
|
|
# Demonstrate that t2 lock was released and t2 was dropped
|
|
# after ROLLBACK TO SAVEPOINT
|
|
# --> connection default
|
|
rollback to savepoint sv;
|
|
# --> connection con2
|
|
# Reaping 'drop table t2'...
|
|
# Demonstrate that ROLLBACK TO SAVEPOINT didn't release the handler
|
|
# lock.
|
|
# --> connection default
|
|
handler t1 read a next;
|
|
a
|
|
3
|
|
handler t1 read a next;
|
|
a
|
|
4
|
|
# Demonstrate that the drop will go through as soon as we close the
|
|
# HANDLER
|
|
handler t1 close;
|
|
# connection con1
|
|
# Reaping 'drop table t1'...
|
|
# --> connection default
|
|
commit;
|
|
drop table t3;
|
|
#
|
|
# A few special cases when using SAVEPOINT/ROLLBACK TO
|
|
# SAVEPOINT and HANDLER.
|
|
#
|
|
# Show that rollback to the savepoint taken in the beginning
|
|
# of the transaction doesn't release mdl lock on
|
|
# the HANDLER that was opened later.
|
|
#
|
|
create table t1 (a int, key a(a));
|
|
insert into t1 (a) values (1), (2), (3), (4), (5);
|
|
create table t2 like t1;
|
|
begin;
|
|
savepoint sv;
|
|
handler t1 open;
|
|
handler t1 read a first;
|
|
a
|
|
1
|
|
handler t1 read a next;
|
|
a
|
|
2
|
|
select * from t2;
|
|
a
|
|
# --> connection con1
|
|
# Sending:
|
|
drop table t1;
|
|
# --> connection con2
|
|
# Sending:
|
|
drop table t2;
|
|
# --> connection default
|
|
# Let DROP TABLE statements sync in. We must use
|
|
# a separate connection for that, because otherwise SELECT
|
|
# will auto-close the HANDLERs, becaues there are pending
|
|
# exclusive locks against them.
|
|
# --> connection con3
|
|
# Waiting for 'drop table t1' to get blocked...
|
|
# Waiting for 'drop table t2' to get blocked...
|
|
# Demonstrate that t2 lock was released and t2 was dropped
|
|
# after ROLLBACK TO SAVEPOINT
|
|
# --> connection default
|
|
rollback to savepoint sv;
|
|
# --> connection con2
|
|
# Reaping 'drop table t2'...
|
|
# Demonstrate that ROLLBACK TO SAVEPOINT didn't release the handler
|
|
# lock.
|
|
# --> connection default
|
|
handler t1 read a next;
|
|
a
|
|
3
|
|
handler t1 read a next;
|
|
a
|
|
4
|
|
# Demonstrate that the drop will go through as soon as we close the
|
|
# HANDLER
|
|
handler t1 close;
|
|
# connection con1
|
|
# Reaping 'drop table t1'...
|
|
# --> connection default
|
|
commit;
|
|
#
|
|
# Show that rollback to the savepoint taken in the beginning
|
|
# of the transaction works properly (no valgrind warnins, etc),
|
|
# even though it's done after the HANDLER mdl lock that was there
|
|
# at the beginning is released and added again.
|
|
#
|
|
create table t1 (a int, key a(a));
|
|
insert into t1 (a) values (1), (2), (3), (4), (5);
|
|
create table t2 like t1;
|
|
create table t3 like t1;
|
|
insert into t3 (a) select a from t1;
|
|
begin;
|
|
handler t1 open;
|
|
savepoint sv;
|
|
handler t1 read a first;
|
|
a
|
|
1
|
|
select * from t2;
|
|
a
|
|
handler t1 close;
|
|
handler t3 open;
|
|
handler t3 read a first;
|
|
a
|
|
1
|
|
rollback to savepoint sv;
|
|
# --> connection con1
|
|
drop table t1, t2;
|
|
# Sending:
|
|
drop table t3;
|
|
# Let DROP TABLE statement sync in.
|
|
# --> connection con2
|
|
# Waiting for 'drop table t3' to get blocked...
|
|
# Demonstrate that ROLLBACK TO SAVEPOINT didn't release the handler
|
|
# lock.
|
|
# --> connection default
|
|
handler t3 read a next;
|
|
a
|
|
2
|
|
# Demonstrate that the drop will go through as soon as we close the
|
|
# HANDLER
|
|
handler t3 close;
|
|
# connection con1
|
|
# Reaping 'drop table t3'...
|
|
# --> connection default
|
|
commit;
|
|
#
|
|
# If we have to wait on an exclusive locks while having
|
|
# an open HANDLER, ER_LOCK_DEADLOCK is reported.
|
|
#
|
|
create table t1 (a int, key a(a));
|
|
create table t2 like t1;
|
|
handler t1 open;
|
|
# --> connection con1
|
|
lock table t2 read;
|
|
# --> connection default
|
|
drop table t2;
|
|
ERROR 40001: Deadlock found when trying to get lock; try restarting transaction
|
|
rename table t2 to t3;
|
|
ERROR 40001: Deadlock found when trying to get lock; try restarting transaction
|
|
# Demonstrate that there is no deadlock with FLUSH TABLE,
|
|
# even though it is waiting for the other table to go away
|
|
# Sending:
|
|
flush table t2;
|
|
# --> connection con2
|
|
drop table t1;
|
|
# --> connection con1
|
|
unlock tables;
|
|
# --> connection default
|
|
# Reaping 'flush table t2'...
|
|
drop table t2;
|
|
#
|
|
# Bug #46224 HANDLER statements within a transaction might
|
|
# lead to deadlocks
|
|
#
|
|
create table t1 (a int, key a(a));
|
|
# --> connection default
|
|
begin;
|
|
select * from t1;
|
|
a
|
|
handler t1 open;
|
|
# --> connection con1
|
|
lock tables t1 write;
|
|
# --> connection default
|
|
# Sending:
|
|
handler t1 read a next;
|
|
# --> connection con1
|
|
# Waiting for 'handler t1 read a next' to get blocked...
|
|
# Sending:
|
|
drop table t1;
|
|
# --> connection con2
|
|
# Waiting for 'drop table t1' to get blocked...
|
|
# --> connection default
|
|
# Reaping 'handler t1 read a next'...
|
|
ERROR 40001: Deadlock found when trying to get lock; try restarting transaction
|
|
handler t1 close;
|
|
commit;
|
|
# --> connection con1
|
|
# Reaping 'drop table t1'...
|
|
# --> connection con1
|
|
# --> connection con2
|
|
# --> connection con3
|
|
#
|
|
# A temporary table test.
|
|
# Check that we don't loose positions of HANDLER opened
|
|
# against a temporary table.
|
|
#
|
|
create table t1 (a int, b int, key a (a));
|
|
insert into t1 (a) values (1), (2), (3), (4), (5);
|
|
create temporary table t2 (a int, b int, key a (a));
|
|
insert into t2 (a) select a from t1;
|
|
handler t1 open;
|
|
handler t1 read a next;
|
|
a b
|
|
1 NULL
|
|
handler t2 open;
|
|
handler t2 read a next;
|
|
a b
|
|
1 NULL
|
|
flush table t1;
|
|
handler t2 read a next;
|
|
a b
|
|
2 NULL
|
|
# Sic: the position is lost
|
|
handler t1 read a next;
|
|
a b
|
|
1 NULL
|
|
select * from t1;
|
|
a b
|
|
1 NULL
|
|
2 NULL
|
|
3 NULL
|
|
4 NULL
|
|
5 NULL
|
|
# Sic: the position is not lost
|
|
handler t2 read a next;
|
|
a b
|
|
3 NULL
|
|
select * from t2;
|
|
ERROR HY000: Can't reopen table: 't2'
|
|
handler t2 read a next;
|
|
a b
|
|
4 NULL
|
|
drop table t1;
|
|
drop temporary table t2;
|
|
#
|
|
# A test for lock_table_names()/unlock_table_names() function.
|
|
# It should work properly in presence of open HANDLER.
|
|
#
|
|
create table t1 (a int, b int, key a (a));
|
|
create table t2 like t1;
|
|
create table t3 like t1;
|
|
create table t4 like t1;
|
|
handler t1 open;
|
|
handler t2 open;
|
|
rename table t4 to t5, t3 to t4, t5 to t3;
|
|
handler t1 read first;
|
|
a b
|
|
handler t2 read first;
|
|
a b
|
|
drop table t1, t2, t3, t4;
|
|
#
|
|
# BUG #46456: HANDLER OPEN + TRUNCATE + DROP (temporary) TABLE, crash
|
|
#
|
|
CREATE TABLE t1 AS SELECT 1 AS f1;
|
|
HANDLER t1 OPEN;
|
|
TRUNCATE t1;
|
|
HANDLER t1 READ FIRST;
|
|
ERROR 42S02: Unknown table 't1' in HANDLER
|
|
DROP TABLE t1;
|
|
CREATE TEMPORARY TABLE t1 AS SELECT 1 AS f1;
|
|
HANDLER t1 OPEN;
|
|
TRUNCATE t1;
|
|
HANDLER t1 READ FIRST;
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ERROR 42S02: Unknown table 't1' in HANDLER
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DROP TABLE t1;
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End of 5.1 tests
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