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eba5d30e67
Add a wait-for graph based deadlock detector to the MDL subsystem. Fixes bug #46272 "MySQL 5.4.4, new MDL: unnecessary deadlock" and bug #37346 "innodb does not detect deadlock between update and alter table". The first bug manifested itself as an unwarranted abort of a transaction with ER_LOCK_DEADLOCK error by a concurrent ALTER statement, when this transaction tried to repeat use of a table, which it has already used in a similar fashion before ALTER started. The second bug showed up as a deadlock between table-level locks and InnoDB row locks, which was "detected" only after innodb_lock_wait_timeout timeout. A transaction would start using the table and modify a few rows. Then ALTER TABLE would come in, and start copying rows into a temporary table. Eventually it would stumble on the modified records and get blocked on a row lock. The first transaction would try to do more updates, and get blocked on thr_lock.c lock. This situation of circular wait would only get resolved by a timeout. Both these bugs stemmed from inadequate solutions to the problem of deadlocks occurring between different locking subsystems. In the first case we tried to avoid deadlocks between metadata locking and table-level locking subsystems, when upgrading shared metadata lock to exclusive one. Transactions holding the shared lock on the table and waiting for some table-level lock used to be aborted too aggressively. We also allowed ALTER TABLE to start in presence of transactions that modify the subject table. ALTER TABLE acquires TL_WRITE_ALLOW_READ lock at start, and that block all writes against the table (naturally, we don't want any writes to be lost when switching the old and the new table). TL_WRITE_ALLOW_READ lock, in turn, would block the started transaction on thr_lock.c lock, should they do more updates. This, again, lead to the need to abort such transactions. The second bug occurred simply because we didn't have any mechanism to detect deadlocks between the table-level locks in thr_lock.c and row-level locks in InnoDB, other than innodb_lock_wait_timeout. This patch solves both these problems by moving lock conflicts which are causing these deadlocks into the metadata locking subsystem, thus making it possible to avoid or detect such deadlocks inside MDL. To do this we introduce new type-of-operation-aware metadata locks, which allow MDL subsystem to know not only the fact that transaction has used or is going to use some object but also what kind of operation it has carried out or going to carry out on the object. This, along with the addition of a special kind of upgradable metadata lock, allows ALTER TABLE to wait until all transactions which has updated the table to go away. This solves the second issue. Another special type of upgradable metadata lock is acquired by LOCK TABLE WRITE. This second lock type allows to solve the first issue, since abortion of table-level locks in event of DDL under LOCK TABLES becomes also unnecessary. Below follows the list of incompatible changes introduced by this patch: - From now on, ALTER TABLE and CREATE/DROP TRIGGER SQL (i.e. those statements that acquire TL_WRITE_ALLOW_READ lock) wait for all transactions which has *updated* the table to complete. - From now on, LOCK TABLES ... WRITE, REPAIR/OPTIMIZE TABLE (i.e. all statements which acquire TL_WRITE table-level lock) wait for all transaction which *updated or read* from the table to complete. As a consequence, innodb_table_locks=0 option no longer applies to LOCK TABLES ... WRITE. - DROP DATABASE, DROP TABLE, RENAME TABLE no longer abort statements or transactions which use tables being dropped or renamed, and instead wait for these transactions to complete. - Since LOCK TABLES WRITE now takes a special metadata lock, not compatible with with reads or writes against the subject table and transaction-wide, thr_lock.c deadlock avoidance algorithm that used to ensure absence of deadlocks between LOCK TABLES WRITE and other statements is no longer sufficient, even for MyISAM. The wait-for graph based deadlock detector of MDL subsystem may sometimes be necessary and is involved. This may lead to ER_LOCK_DEADLOCK error produced for multi-statement transactions even if these only use MyISAM: session 1: session 2: begin; update t1 ... lock table t2 write, t1 write; -- gets a lock on t2, blocks on t1 update t2 ... (ER_LOCK_DEADLOCK) - Finally, support of LOW_PRIORITY option for LOCK TABLES ... WRITE was abandoned. LOCK TABLE ... LOW_PRIORITY WRITE from now on has the same priority as the usual LOCK TABLE ... WRITE. SELECT HIGH PRIORITY no longer trumps LOCK TABLE ... WRITE in the wait queue. - We do not take upgradable metadata locks on implicitly locked tables. So if one has, say, a view v1 that uses table t1, and issues: LOCK TABLE v1 WRITE; FLUSH TABLE t1; -- (or just 'FLUSH TABLES'), an error is produced. In order to be able to perform DDL on a table under LOCK TABLES, the table must be locked explicitly in the LOCK TABLES list. mysql-test/include/handler.inc: Adjusted test case to trigger an execution path on which bug 41110 "crash with handler command when used concurrently with alter table" and bug 41112 "crash in mysql_ha_close_table/get_lock_data with alter table" were originally discovered. Left old test case which no longer triggers this execution path for the sake of coverage. Added test coverage for HANDLER SQL statements and type-aware metadata locks. Added a test for the global shared lock and HANDLER SQL. Updated tests to take into account that the old simple deadlock detection heuristics was replaced with a graph-based deadlock detector. mysql-test/r/debug_sync.result: Updated results (see debug_sync.test). mysql-test/r/handler_innodb.result: Updated results (see handler.inc test). mysql-test/r/handler_myisam.result: Updated results (see handler.inc test). mysql-test/r/innodb-lock.result: Updated results (see innodb-lock.test). mysql-test/r/innodb_mysql_lock.result: Updated results (see innodb_mysql_lock.test). mysql-test/r/lock.result: Updated results (see lock.test). mysql-test/r/lock_multi.result: Updated results (see lock_multi.test). mysql-test/r/lock_sync.result: Updated results (see lock_sync.test). mysql-test/r/mdl_sync.result: Updated results (see mdl_sync.test). mysql-test/r/sp-threads.result: SHOW PROCESSLIST output has changed due to the fact that waiting for LOCK TABLES WRITE now happens within metadata locking subsystem. mysql-test/r/truncate_coverage.result: Updated results (see truncate_coverage.test). mysql-test/suite/funcs_1/datadict/processlist_val.inc: SELECT FROM I_S.PROCESSLIST output has changed due to fact that waiting for LOCK TABLES WRITE now happens within metadata locking subsystem. mysql-test/suite/funcs_1/r/processlist_val_no_prot.result: SELECT FROM I_S.PROCESSLIST output has changed due to fact that waiting for LOCK TABLES WRITE now happens within metadata locking subsystem. mysql-test/suite/rpl/t/rpl_sp.test: Updated to a new SHOW PROCESSLIST state name. mysql-test/t/debug_sync.test: Use LOCK TABLES READ instead of LOCK TABLES WRITE as the latter no longer allows to trigger execution path involving waiting on thr_lock.c lock and therefore reaching debug sync-point covered by this test. mysql-test/t/innodb-lock.test: Adjusted test case to the fact that innodb_table_locks=0 option is no longer supported, since LOCK TABLES WRITE handles all its conflicts within MDL subsystem. mysql-test/t/innodb_mysql_lock.test: Added test for bug #37346 "innodb does not detect deadlock between update and alter table". mysql-test/t/lock.test: Added test coverage which checks the fact that we no longer support DDL under LOCK TABLES on tables which were locked implicitly. Adjusted existing test cases accordingly. mysql-test/t/lock_multi.test: Added test for bug #46272 "MySQL 5.4.4, new MDL: unnecessary deadlock". Adjusted other test cases to take into account the fact that waiting for LOCK TABLES ... WRITE now happens within MDL subsystem. mysql-test/t/lock_sync.test: Since LOCK TABLES ... WRITE now takes SNRW metadata lock for tables locked explicitly we have to implicitly lock InnoDB tables (through view) to trigger the table-level lock conflict between TL_WRITE and TL_WRITE_ALLOW_WRITE. mysql-test/t/mdl_sync.test: Added basic test coverage for type-of-operation-aware metadata locks. Also covered with tests some use cases involving HANDLER statements in which a deadlock could arise. Adjusted existing tests to take type-of-operation-aware MDL into account. mysql-test/t/multi_update.test: Update to a new SHOW PROCESSLIST state name. mysql-test/t/truncate_coverage.test: Adjusted test case after making LOCK TABLES WRITE to wait until transactions that use the table to be locked are completed. Updated to the changed name of DEBUG_SYNC point. sql/handler.cc: Global read lock functionality has been moved into a class. sql/lock.cc: Global read lock functionality has been moved into a class. Updated code to use the new MDL API. sql/mdl.cc: Introduced new type-of-operation aware metadata locks. To do this: - Changed MDL_lock to use one list for waiting requests and one list for granted requests. For each list, added a bitmap that holds information what lock types a list contains. Added a helper class MDL_lock::List to manipulate with granted and waited lists while keeping the bitmaps in sync with list contents. - Changed lock-compatibility functions to use bitmaps that define compatibility. - Introduced a graph based deadlock detector inspired by waiting_threads.c from Maria implementation. - Now that we have a deadlock detector, and no longer have a global lock to protect individual lock objects, but rather use an rw lock per object, removed redundant code for upgrade, and the global read lock. Changed the MDL API to no longer require the caller to acquire the global intention exclusive lock by means of a separate method. Removed a few more methods that became redundant. - Removed deadlock detection heuristic, it has been made obsolete by the deadlock detector. - With operation-type-aware metadata locks, MDL subsystem has become aware of potential conflicts between DDL and open transactions. This made it possible to remove calls to mysql_abort_transactions_with_shared_lock() from acquisition paths for exclusive lock and lock upgrade. Now we can simply wait for these transactions to complete without fear of deadlock. Function mysql_lock_abort() has also become unnecessary for all conflicting cases except when a DDL conflicts with a connection that has an open HANDLER. sql/mdl.h: Introduced new type-of-operation aware metadata locks. Introduced a graph based deadlock detector and supporting methods. Added comments. God rid of redundant API calls. Renamed m_lt_or_ha_sentinel to m_trans_sentinel, since now it guards the global read lock as well as LOCK TABLES and HANDLER locks. sql/mysql_priv.h: Moved the global read lock functionality into a class. Added MYSQL_OPEN_FORCE_SHARED_MDL flag which forces open_tables() to take MDL_SHARED on tables instead of metadata locks specified in the parser. We use this to allow PREPARE run concurrently in presence of LOCK TABLES ... WRITE. Added signature for find_table_for_mdl_ugprade(). sql/set_var.cc: Global read lock functionality has been moved into a class. sql/sp_head.cc: When creating TABLE_LIST elements for prelocking or system tables set the type of request for metadata lock according to the operation that will be performed on the table. sql/sql_base.cc: - Updated code to use the new MDL API. - In order to avoid locks starvation we take upgradable locks all at once. As result implicitly locked tables no longer get an upgradable lock. Consequently DDL and FLUSH TABLES for such tables is prohibited. find_write_locked_table() was replaced by find_table_for_mdl_upgrade() function. open_table() was adjusted to return TABLE instance with upgradable ticket when necessary. - We no longer wait for all locks on OT_WAIT back off action -- only on the lock that caused the wait conflict. Moreover, now we distinguish cases when we have to wait due to conflict in MDL and old version of table in TDC. - Upate mysql_notify_threads_having_share_locks() to only abort thr_lock.c waits of threads that have open HANDLERs, since lock conflicts with only these threads now can lead to deadlocks not detectable by the MDL deadlock detector. - Remove mysql_abort_transactions_with_shared_locks() which is no longer needed. sql/sql_class.cc: Global read lock functionality has been moved into a class. Re-arranged code in THD::cleanup() to simplify assert. sql/sql_class.h: Introduced class to incapsulate global read lock functionality. Now sentinel in MDL subsystem guards the global read lock as well as LOCK TABLES and HANDLER locks. Adjusted code accordingly. sql/sql_db.cc: Global read lock functionality has been moved into a class. sql/sql_delete.cc: We no longer acquire upgradable metadata locks on tables which are locked by LOCK TABLES implicitly. As result TRUNCATE TABLE is no longer allowed for such tables. Updated code to use the new MDL API. sql/sql_handler.cc: Inform MDL_context about presence of open HANDLERs. Since HANLDERs break MDL protocol by acquiring table-level lock while holding only S metadata lock on a table MDL subsystem should take special care about such contexts (Now this is the only case when mysql_lock_abort() is used). sql/sql_parse.cc: Global read lock functionality has been moved into a class. Do not take upgradable metadata locks when opening tables for CREATE TABLE SELECT as it is not necessary and limits concurrency. When initializing TABLE_LIST objects before adding them to the table list set the type of request for metadata lock according to the operation that will be performed on the table. We no longer acquire upgradable metadata locks on tables which are locked by LOCK TABLES implicitly. As result FLUSH TABLES is no longer allowed for such tables. sql/sql_prepare.cc: Use MYSQL_OPEN_FORCE_SHARED_MDL flag when opening tables during PREPARE. This allows PREPARE to run concurrently in presence of LOCK TABLES ... WRITE. sql/sql_rename.cc: Global read lock functionality has been moved into a class. sql/sql_show.cc: Updated code to use the new MDL API. sql/sql_table.cc: Global read lock functionality has been moved into a class. We no longer acquire upgradable metadata locks on tables which are locked by LOCK TABLES implicitly. As result DROP TABLE is no longer allowed for such tables. Updated code to use the new MDL API. sql/sql_trigger.cc: Global read lock functionality has been moved into a class. We no longer acquire upgradable metadata locks on tables which are locked by LOCK TABLES implicitly. As result CREATE/DROP TRIGGER is no longer allowed for such tables. Updated code to use the new MDL API. sql/sql_view.cc: Global read lock functionality has been moved into a class. Fixed results of wrong merge that led to misuse of GLR API. CREATE VIEW statement is not a commit statement. sql/table.cc: When resetting TABLE_LIST objects for PS or SP re-execution set the type of request for metadata lock according to the operation that will be performed on the table. Do the same in auxiliary function initializing metadata lock requests in a table list. sql/table.h: When initializing TABLE_LIST objects set the type of request for metadata lock according to the operation that will be performed on the table. sql/transaction.cc: Global read lock functionality has been moved into a class.
3215 lines
97 KiB
Text
3215 lines
97 KiB
Text
#
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# We need the Debug Sync Facility.
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#
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--source include/have_debug_sync.inc
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# Save the initial number of concurrent sessions.
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--source include/count_sessions.inc
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# Clean up resources used in this test case.
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--disable_warnings
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SET DEBUG_SYNC= 'RESET';
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--enable_warnings
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#
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# Test the case of when a exclusive lock request waits for a
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# shared lock being upgraded to a exclusive lock.
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#
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connect (con1,localhost,root,,test,,);
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connect (con2,localhost,root,,test,,);
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connect (con3,localhost,root,,test,,);
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connection default;
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--disable_warnings
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drop table if exists t1,t2,t3;
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--enable_warnings
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create table t1 (i int);
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create table t2 (i int);
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--echo connection: default
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lock tables t2 read;
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connection con1;
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--echo connection: con1
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set debug_sync='mdl_upgrade_shared_lock_to_exclusive SIGNAL parked WAIT_FOR go';
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--send alter table t1 rename t3
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connection default;
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--echo connection: default
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set debug_sync= 'now WAIT_FOR parked';
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connection con2;
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--echo connection: con2
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set debug_sync='mdl_acquire_lock_wait SIGNAL go';
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--send drop table t1,t2
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connection con1;
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--echo connection: con1
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--reap
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connection default;
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--echo connection: default
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unlock tables;
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connection con2;
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--echo connection: con2
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--error ER_BAD_TABLE_ERROR
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--reap
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connection default;
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drop table t3;
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disconnect con1;
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disconnect con2;
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disconnect con3;
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# Clean up resources used in this test case.
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--disable_warnings
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SET DEBUG_SYNC= 'RESET';
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--enable_warnings
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--echo #
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--echo # Basic test coverage for type-of-operation aware metadata locks.
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--echo #
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--disable_warnings
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drop table if exists t1, t2, t3;
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--enable_warnings
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connect(mdl_con1,localhost,root,,);
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connect(mdl_con2,localhost,root,,);
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connect(mdl_con3,localhost,root,,);
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connection default;
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set debug_sync= 'RESET';
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create table t1 (c1 int);
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--echo #
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--echo # A) First let us check compatibility rules between differend kinds of
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--echo # type-of-operation aware metadata locks.
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--echo # Of course, these rules are already covered by the tests scattered
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--echo # across the test suite. But it still makes sense to have one place
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--echo # which covers all of them.
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--echo #
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--echo # 1) Acquire S (simple shared) lock on the table (by using HANDLER):
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--echo #
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handler t1 open;
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--echo #
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--echo # Switching to connection 'mdl_con1'.
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connection mdl_con1;
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--echo # Check that S, SH, SR and SW locks are compatible with it.
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handler t1 open t;
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handler t close;
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select column_name from information_schema.columns where
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table_schema='test' and table_name='t1';
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select count(*) from t1;
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insert into t1 values (1), (1);
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--echo # Check that SNW lock is compatible with it. To do this use ALTER TABLE
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--echo # which will fail after opening the table and thus obtaining SNW metadata
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--echo # lock.
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--error ER_DUP_ENTRY
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alter table t1 add primary key (c1);
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--echo # Check that SNRW lock is compatible with S lock.
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lock table t1 write;
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insert into t1 values (1);
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unlock tables;
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--echo # Check that X lock is incompatible with S lock.
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--echo # Sending:
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--send rename table t1 to t2;
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--echo #
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--echo # Switching to connection 'mdl_con2'.
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connection mdl_con2;
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--echo # Check that the above RENAME is blocked because of S lock.
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let $wait_condition=
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select count(*) = 1 from information_schema.processlist
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where state = "Waiting for table" and info = "rename table t1 to t2";
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--source include/wait_condition.inc
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--echo #
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--echo # Switching to connection 'default'.
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connection default;
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--echo # Unblock RENAME TABLE.
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handler t1 close;
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--echo #
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--echo # Switching to connection 'mdl_con1'.
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connection mdl_con1;
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--echo # Reaping RENAME TABLE.
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--reap
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--echo # Restore the original state of the things.
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rename table t2 to t1;
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--echo #
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--echo # Switching to connection 'default'.
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connection default;
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handler t1 open;
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--echo #
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--echo # Switching to connection 'mdl_con1'.
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connection mdl_con1;
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--echo # Check that upgrade from SNW to X is blocked by presence of S lock.
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--echo # Sending:
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--send alter table t1 add column c2 int;
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--echo #
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--echo # Switching to connection 'mdl_con2'.
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connection mdl_con2;
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--echo # Check that the above ALTER TABLE is blocked because of S lock.
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let $wait_condition=
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select count(*) = 1 from information_schema.processlist
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where state = "Waiting for table" and info = "alter table t1 add column c2 int";
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--source include/wait_condition.inc
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--echo #
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--echo # Switching to connection 'default'.
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connection default;
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--echo # Unblock ALTER TABLE.
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handler t1 close;
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--echo #
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--echo # Switching to connection 'mdl_con1'.
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connection mdl_con1;
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--echo # Reaping ALTER TABLE.
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--reap
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--echo # Restore the original state of the things.
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alter table t1 drop column c2;
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--echo #
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--echo # Switching to connection 'default'.
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connection default;
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handler t1 open;
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--echo #
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--echo # Switching to connection 'mdl_con1'.
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connection mdl_con1;
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--echo # Check that upgrade from SNRW to X is blocked by presence of S lock.
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lock table t1 write;
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--echo # Sending:
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--send alter table t1 add column c2 int;
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--echo #
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--echo # Switching to connection 'mdl_con2'.
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connection mdl_con2;
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--echo # Check that the above upgrade of SNRW to X in ALTER TABLE is blocked
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--echo # because of S lock.
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let $wait_condition=
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select count(*) = 1 from information_schema.processlist
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where state = "Waiting for table" and info = "alter table t1 add column c2 int";
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--source include/wait_condition.inc
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--echo #
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--echo # Switching to connection 'default'.
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connection default;
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--echo # Unblock ALTER TABLE.
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handler t1 close;
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--echo #
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--echo # Switching to connection 'mdl_con1'.
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connection mdl_con1;
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--echo # Reaping ALTER TABLE.
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--reap
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--echo # Restore the original state of the things.
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alter table t1 drop column c2;
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unlock tables;
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--echo #
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--echo # Switching to connection 'default'.
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connection default;
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--echo #
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--echo # 2) Acquire SH (shared high-priority) lock on the table.
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--echo # We have to involve DEBUG_SYNC facility for this as usually
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--echo # such kind of locks are short-lived.
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--echo #
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set debug_sync= 'after_open_table_mdl_shared SIGNAL locked WAIT_FOR finish';
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--echo # Sending:
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--send select table_name, table_type, auto_increment, table_comment from information_schema.tables where table_schema='test' and table_name='t1';
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--echo #
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--echo # Switching to connection 'mdl_con1'.
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connection mdl_con1;
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set debug_sync= 'now WAIT_FOR locked';
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--echo # Check that S, SH, SR and SW locks are compatible with it.
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handler t1 open;
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handler t1 close;
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select column_name from information_schema.columns where
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table_schema='test' and table_name='t1';
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select count(*) from t1;
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insert into t1 values (1);
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--echo # Check that SNW lock is compatible with it. To do this use ALTER TABLE
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--echo # which will fail after opening the table and thus obtaining SNW metadata
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--echo # lock.
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--error ER_DUP_ENTRY
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alter table t1 add primary key (c1);
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--echo # Check that SNRW lock is compatible with SH lock.
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lock table t1 write;
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delete from t1 limit 1;
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unlock tables;
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--echo # Check that X lock is incompatible with SH lock.
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--echo # Sending:
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--send rename table t1 to t2;
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--echo #
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--echo # Switching to connection 'mdl_con2'.
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connection mdl_con2;
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--echo # Check that the above RENAME is blocked because of SH lock.
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let $wait_condition=
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select count(*) = 1 from information_schema.processlist
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where state = "Waiting for table" and info = "rename table t1 to t2";
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--source include/wait_condition.inc
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--echo # Unblock RENAME TABLE.
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set debug_sync= 'now SIGNAL finish';
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--echo #
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--echo # Switching to connection 'default'.
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connection default;
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--echo # Reaping SELECT ... FROM I_S.
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--reap
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--echo #
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--echo # Switching to connection 'mdl_con1'.
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connection mdl_con1;
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--echo # Reaping RENAME TABLE.
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--reap
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--echo # Restore the original state of the things.
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rename table t2 to t1;
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--echo #
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--echo # Switching to connection 'default'.
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connection default;
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set debug_sync= 'after_open_table_mdl_shared SIGNAL locked WAIT_FOR finish';
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--echo # Sending:
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--send select table_name, table_type, auto_increment, table_comment from information_schema.tables where table_schema='test' and table_name='t1';
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--echo #
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--echo # Switching to connection 'mdl_con1'.
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connection mdl_con1;
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set debug_sync= 'now WAIT_FOR locked';
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|
--echo # Check that upgrade from SNW to X is blocked by presence of SH lock.
|
|
--echo # Sending:
|
|
--send alter table t1 add column c2 int;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Check that the above ALTER TABLE is blocked because of SH lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "alter table t1 add column c2 int";
|
|
--source include/wait_condition.inc
|
|
--echo # Unblock RENAME TABLE.
|
|
set debug_sync= 'now SIGNAL finish';
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reaping SELECT ... FROM I_S.
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reaping ALTER TABLE.
|
|
--reap
|
|
--echo # Restore the original state of the things.
|
|
alter table t1 drop column c2;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
set debug_sync= 'after_open_table_mdl_shared SIGNAL locked WAIT_FOR finish';
|
|
--send select table_name, table_type, auto_increment, table_comment from information_schema.tables where table_schema='test' and table_name='t1';
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
set debug_sync= 'now WAIT_FOR locked';
|
|
--echo # Check that upgrade from SNRW to X is blocked by presence of S lock.
|
|
lock table t1 write;
|
|
--echo # Sending:
|
|
--send alter table t1 add column c2 int;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Check that the above upgrade of SNRW to X in ALTER TABLE is blocked
|
|
--echo # because of S lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "alter table t1 add column c2 int";
|
|
--source include/wait_condition.inc
|
|
--echo # Unblock RENAME TABLE.
|
|
set debug_sync= 'now SIGNAL finish';
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reaping SELECT ... FROM I_S.
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reaping ALTER TABLE.
|
|
--reap
|
|
--echo # Restore the original state of the things.
|
|
alter table t1 drop column c2;
|
|
unlock tables;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo #
|
|
--echo #
|
|
--echo # 3) Acquire SR lock on the table.
|
|
--echo #
|
|
--echo #
|
|
begin;
|
|
select count(*) from t1;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Check that S, SH, SR and SW locks are compatible with it.
|
|
handler t1 open;
|
|
handler t1 close;
|
|
select column_name from information_schema.columns where
|
|
table_schema='test' and table_name='t1';
|
|
select count(*) from t1;
|
|
insert into t1 values (1);
|
|
--echo # Check that SNW lock is compatible with it. To do this use ALTER TABLE
|
|
--echo # which will fail after opening the table and thus obtaining SNW metadata
|
|
--echo # lock.
|
|
--error ER_DUP_ENTRY
|
|
alter table t1 add primary key (c1);
|
|
--echo # Check that SNRW lock is not compatible with SR lock.
|
|
--echo # Sending:
|
|
--send lock table t1 write;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Check that the above LOCK TABLES is blocked because of SR lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "lock table t1 write";
|
|
--source include/wait_condition.inc
|
|
--echo # Unblock LOCK TABLES.
|
|
commit;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reaping LOCK TABLES.
|
|
--reap
|
|
delete from t1 limit 1;
|
|
unlock tables;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
begin;
|
|
select count(*) from t1;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Check that X lock is incompatible with SR lock.
|
|
--echo # Sending:
|
|
--send rename table t1 to t2;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Check that the above RENAME is blocked because of SR lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "rename table t1 to t2";
|
|
--source include/wait_condition.inc
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Unblock RENAME TABLE.
|
|
commit;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reaping RENAME TABLE.
|
|
--reap
|
|
--echo # Restore the original state of the things.
|
|
rename table t2 to t1;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
begin;
|
|
select count(*) from t1;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Check that upgrade from SNW to X is blocked by presence of SR lock.
|
|
--echo # Sending:
|
|
--send alter table t1 add column c2 int;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Check that the above ALTER TABLE is blocked because of SR lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "alter table t1 add column c2 int";
|
|
--source include/wait_condition.inc
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Unblock ALTER TABLE.
|
|
commit;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reaping ALTER TABLE.
|
|
--reap
|
|
--echo # Restore the original state of the things.
|
|
alter table t1 drop column c2;
|
|
--echo #
|
|
--echo # There is no need to check that upgrade from SNRW to X is blocked
|
|
--echo # by presence of SR lock because SNRW is incompatible with SR anyway.
|
|
--echo #
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo #
|
|
--echo #
|
|
--echo # 4) Acquire SW lock on the table.
|
|
--echo #
|
|
--echo #
|
|
begin;
|
|
insert into t1 values (1);
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Check that S, SH, SR and SW locks are compatible with it.
|
|
handler t1 open;
|
|
handler t1 close;
|
|
select column_name from information_schema.columns where
|
|
table_schema='test' and table_name='t1';
|
|
select count(*) from t1;
|
|
insert into t1 values (1);
|
|
--echo # Check that SNW lock is not compatible with SW lock.
|
|
--echo # Again we use ALTER TABLE which fails after opening
|
|
--echo # the table to avoid upgrade of SNW -> X.
|
|
--echo # Sending:
|
|
--send alter table t1 add primary key (c1);
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Check that the above ALTER TABLE is blocked because of SW lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "alter table t1 add primary key (c1)";
|
|
--source include/wait_condition.inc
|
|
--echo # Unblock ALTER TABLE.
|
|
commit;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reaping ALTER TABLE.
|
|
--error ER_DUP_ENTRY
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
begin;
|
|
insert into t1 values (1);
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Check that SNRW lock is not compatible with SW lock.
|
|
--echo # Sending:
|
|
--send lock table t1 write;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Check that the above LOCK TABLES is blocked because of SW lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "lock table t1 write";
|
|
--source include/wait_condition.inc
|
|
--echo # Unblock LOCK TABLES.
|
|
commit;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reaping LOCK TABLES.
|
|
--reap
|
|
delete from t1 limit 2;
|
|
unlock tables;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
begin;
|
|
insert into t1 values (1);
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Check that X lock is incompatible with SW lock.
|
|
--echo # Sending:
|
|
--send rename table t1 to t2;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Check that the above RENAME is blocked because of SW lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "rename table t1 to t2";
|
|
--source include/wait_condition.inc
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Unblock RENAME TABLE.
|
|
commit;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reaping RENAME TABLE.
|
|
--reap
|
|
--echo # Restore the original state of the things.
|
|
rename table t2 to t1;
|
|
--echo #
|
|
--echo # There is no need to check that upgrade from SNW/SNRW to X is
|
|
--echo # blocked by presence of SW lock because SNW/SNRW is incompatible
|
|
--echo # with SW anyway.
|
|
--echo #
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo #
|
|
--echo #
|
|
--echo # 5) Acquire SNW lock on the table. We have to use DEBUG_SYNC for
|
|
--echo # this, to prevent SNW from being immediately upgraded to X.
|
|
--echo #
|
|
set debug_sync= 'after_open_table_mdl_shared SIGNAL locked WAIT_FOR finish';
|
|
--echo # Sending:
|
|
--send alter table t1 add primary key (c1);
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
set debug_sync= 'now WAIT_FOR locked';
|
|
--echo # Check that S, SH and SR locks are compatible with it.
|
|
handler t1 open;
|
|
handler t1 close;
|
|
select column_name from information_schema.columns where
|
|
table_schema='test' and table_name='t1';
|
|
select count(*) from t1;
|
|
--echo # Check that SW lock is incompatible with SNW lock.
|
|
--echo # Sending:
|
|
--send delete from t1 limit 2;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Check that the above DELETE is blocked because of SNW lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "delete from t1 limit 2";
|
|
--source include/wait_condition.inc
|
|
--echo # Unblock ALTER and thus DELETE.
|
|
set debug_sync= 'now SIGNAL finish';
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reaping ALTER TABLE.
|
|
--error ER_DUP_ENTRY
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reaping DELETE.
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
set debug_sync= 'after_open_table_mdl_shared SIGNAL locked WAIT_FOR finish';
|
|
--echo # Sending:
|
|
--send alter table t1 add primary key (c1);
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
set debug_sync= 'now WAIT_FOR locked';
|
|
--echo # Check that SNW lock is incompatible with SNW lock.
|
|
--echo # Sending:
|
|
--send alter table t1 add primary key (c1);
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Check that the above ALTER is blocked because of SNW lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "alter table t1 add primary key (c1)";
|
|
--source include/wait_condition.inc
|
|
--echo # Unblock ALTERs.
|
|
set debug_sync= 'now SIGNAL finish';
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reaping first ALTER TABLE.
|
|
--error ER_DUP_ENTRY
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reaping another ALTER TABLE.
|
|
--error ER_DUP_ENTRY
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
set debug_sync= 'after_open_table_mdl_shared SIGNAL locked WAIT_FOR finish';
|
|
--echo # Sending:
|
|
--send alter table t1 add primary key (c1);
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
set debug_sync= 'now WAIT_FOR locked';
|
|
--echo # Check that SNRW lock is incompatible with SNW lock.
|
|
--echo # Sending:
|
|
--send lock table t1 write;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Check that the above LOCK TABLES is blocked because of SNW lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "lock table t1 write";
|
|
--source include/wait_condition.inc
|
|
--echo # Unblock ALTER and thus LOCK TABLES.
|
|
set debug_sync= 'now SIGNAL finish';
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reaping ALTER TABLE.
|
|
--error ER_DUP_ENTRY
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reaping LOCK TABLES
|
|
--reap
|
|
insert into t1 values (1);
|
|
unlock tables;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
set debug_sync= 'after_open_table_mdl_shared SIGNAL locked WAIT_FOR finish';
|
|
--echo # Sending:
|
|
--send alter table t1 add primary key (c1);
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
set debug_sync= 'now WAIT_FOR locked';
|
|
--echo # Check that X lock is incompatible with SNW lock.
|
|
--echo # Sending:
|
|
--send rename table t1 to t2;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Check that the above RENAME is blocked because of SNW lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "rename table t1 to t2";
|
|
--source include/wait_condition.inc
|
|
--echo # Unblock ALTER and thus RENAME TABLE.
|
|
set debug_sync= 'now SIGNAL finish';
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reaping ALTER TABLE.
|
|
--error ER_DUP_ENTRY
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reaping RENAME TABLE
|
|
--reap
|
|
--echo # Revert back to original state of things.
|
|
rename table t2 to t1;
|
|
--echo #
|
|
--echo # There is no need to check that upgrade from SNW/SNRW to X is
|
|
--echo # blocked by presence of another SNW lock because SNW/SNRW is
|
|
--echo # incompatible with SNW anyway.
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo #
|
|
--echo #
|
|
--echo # 6) Acquire SNRW lock on the table.
|
|
--echo #
|
|
--echo #
|
|
lock table t1 write;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Check that S and SH locks are compatible with it.
|
|
handler t1 open;
|
|
handler t1 close;
|
|
select column_name from information_schema.columns where
|
|
table_schema='test' and table_name='t1';
|
|
--echo # Check that SR lock is incompatible with SNRW lock.
|
|
--echo # Sending:
|
|
--send select count(*) from t1;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Check that the above SELECT is blocked because of SNRW lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "select count(*) from t1";
|
|
--source include/wait_condition.inc
|
|
--echo # Unblock SELECT.
|
|
unlock tables;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reaping SELECT.
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
lock table t1 write;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Check that SW lock is incompatible with SNRW lock.
|
|
--echo # Sending:
|
|
--send delete from t1 limit 1;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Check that the above DELETE is blocked because of SNRW lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "delete from t1 limit 1";
|
|
--source include/wait_condition.inc
|
|
--echo # Unblock DELETE.
|
|
unlock tables;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reaping DELETE.
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
lock table t1 write;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Check that SNW lock is incompatible with SNRW lock.
|
|
--echo # Sending:
|
|
--send alter table t1 add primary key (c1);
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Check that the above ALTER is blocked because of UNWR lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "alter table t1 add primary key (c1)";
|
|
--source include/wait_condition.inc
|
|
--echo # Unblock ALTER.
|
|
unlock tables;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reaping ALTER TABLE.
|
|
--error ER_DUP_ENTRY
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
lock table t1 write;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Check that SNRW lock is incompatible with SNRW lock.
|
|
--echo # Sending:
|
|
--send lock table t1 write;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Check that the above LOCK TABLES is blocked because of SNRW lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "lock table t1 write";
|
|
--source include/wait_condition.inc
|
|
--echo # Unblock waiting LOCK TABLES.
|
|
unlock tables;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reaping LOCK TABLES
|
|
--reap
|
|
insert into t1 values (1);
|
|
unlock tables;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
lock table t1 write;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Check that X lock is incompatible with SNRW lock.
|
|
--echo # Sending:
|
|
--send rename table t1 to t2;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Check that the above RENAME is blocked because of SNRW lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "rename table t1 to t2";
|
|
--source include/wait_condition.inc
|
|
--echo # Unblock RENAME TABLE
|
|
unlock tables;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reaping RENAME TABLE
|
|
--reap
|
|
--echo # Revert back to original state of things.
|
|
rename table t2 to t1;
|
|
--echo #
|
|
--echo # There is no need to check that upgrade from SNW/SNRW to X is
|
|
--echo # blocked by presence of another SNRW lock because SNW/SNRW is
|
|
--echo # incompatible with SNRW anyway.
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo #
|
|
--echo #
|
|
--echo # 7) Now do the same round of tests for X lock. We use additional
|
|
--echo # table to get long-lived lock of this type.
|
|
--echo #
|
|
create table t2 (c1 int);
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Take a lock on t2, so RENAME TABLE t1 TO t2 will get blocked
|
|
--echo # after acquiring X lock on t1.
|
|
lock tables t2 read;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Sending:
|
|
--send rename table t1 to t2;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Check that RENAME has acquired X lock on t1 and is waiting for t2.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "rename table t1 to t2";
|
|
--source include/wait_condition.inc
|
|
--echo # Check that S lock in incompatible with X lock.
|
|
--echo # Sending:
|
|
--send handler t1 open;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Check that the above HANDLER statement is blocked because of X lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "handler t1 open";
|
|
--source include/wait_condition.inc
|
|
--echo # Unblock RENAME TABLE
|
|
unlock tables;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reaping RENAME TABLE.
|
|
--error ER_TABLE_EXISTS_ERROR
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reaping HANDLER.
|
|
--reap
|
|
handler t1 close;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Prepare for blocking RENAME TABLE.
|
|
lock tables t2 read;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Sending:
|
|
--send rename table t1 to t2;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Check that RENAME has acquired X lock on t1 and is waiting for t2.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "rename table t1 to t2";
|
|
--source include/wait_condition.inc
|
|
--echo # Check that SH lock in incompatible with X lock.
|
|
--echo # Sending:
|
|
--send select column_name from information_schema.columns where table_schema='test' and table_name='t1';
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Check that the above SELECT ... FROM I_S ... statement is blocked
|
|
--echo # because of X lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info like "select column_name from information_schema.columns%";
|
|
--source include/wait_condition.inc
|
|
--echo # Unblock RENAME TABLE
|
|
unlock tables;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reaping RENAME TABLE.
|
|
--error ER_TABLE_EXISTS_ERROR
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reaping SELECT ... FROM I_S.
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Prepare for blocking RENAME TABLE.
|
|
lock tables t2 read;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Sending:
|
|
--send rename table t1 to t2;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Check that RENAME has acquired X lock on t1 and is waiting for t2.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "rename table t1 to t2";
|
|
--source include/wait_condition.inc
|
|
--echo # Check that SR lock in incompatible with X lock.
|
|
--echo # Sending:
|
|
--send select count(*) from t1;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Check that the above SELECT statement is blocked
|
|
--echo # because of X lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "select count(*) from t1";
|
|
--source include/wait_condition.inc
|
|
--echo # Unblock RENAME TABLE
|
|
unlock tables;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reaping RENAME TABLE.
|
|
--error ER_TABLE_EXISTS_ERROR
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reaping SELECT.
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Prepare for blocking RENAME TABLE.
|
|
lock tables t2 read;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Sending:
|
|
--send rename table t1 to t2;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Check that RENAME has acquired X lock on t1 and is waiting for t2.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "rename table t1 to t2";
|
|
--source include/wait_condition.inc
|
|
--echo # Check that SW lock in incompatible with X lock.
|
|
--echo # Sending:
|
|
--send delete from t1 limit 1;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Check that the above DELETE statement is blocked
|
|
--echo # because of X lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "delete from t1 limit 1";
|
|
--source include/wait_condition.inc
|
|
--echo # Unblock RENAME TABLE
|
|
unlock tables;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reaping RENAME TABLE.
|
|
--error ER_TABLE_EXISTS_ERROR
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reaping DELETE.
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Prepare for blocking RENAME TABLE.
|
|
lock tables t2 read;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Sending:
|
|
--send rename table t1 to t2;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Check that RENAME has acquired X lock on t1 and is waiting for t2.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "rename table t1 to t2";
|
|
--source include/wait_condition.inc
|
|
--echo # Check that SNW lock is incompatible with X lock.
|
|
--echo # Sending:
|
|
--send alter table t1 add primary key (c1);
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Check that the above ALTER statement is blocked
|
|
--echo # because of X lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "alter table t1 add primary key (c1)";
|
|
--source include/wait_condition.inc
|
|
--echo # Unblock RENAME TABLE
|
|
unlock tables;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reaping RENAME TABLE
|
|
--error ER_TABLE_EXISTS_ERROR
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reaping ALTER.
|
|
--error ER_DUP_ENTRY
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Prepare for blocking RENAME TABLE.
|
|
lock tables t2 read;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Sending:
|
|
--send rename table t1 to t2;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Check that RENAME has acquired X lock on t1 and is waiting for t2.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "rename table t1 to t2";
|
|
--source include/wait_condition.inc
|
|
--echo # Check that SNRW lock is incompatible with X lock.
|
|
--echo # Sending:
|
|
--send lock table t1 write;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Check that the above LOCK TABLE statement is blocked
|
|
--echo # because of X lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "lock table t1 write";
|
|
--source include/wait_condition.inc
|
|
--echo # Unblock RENAME TABLE
|
|
unlock tables;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reaping RENAME TABLE
|
|
--error ER_TABLE_EXISTS_ERROR
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reaping LOCK TABLE.
|
|
--reap
|
|
unlock tables;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Prepare for blocking RENAME TABLE.
|
|
lock tables t2 read;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Sending:
|
|
--send rename table t1 to t2;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Check that RENAME has acquired X lock on t1 and is waiting for t2.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "rename table t1 to t2";
|
|
--source include/wait_condition.inc
|
|
--echo # Check that X lock is incompatible with X lock.
|
|
--echo # Sending:
|
|
--send rename table t1 to t3;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Check that the above RENAME statement is blocked
|
|
--echo # because of X lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "rename table t1 to t3";
|
|
--source include/wait_condition.inc
|
|
--echo # Unblock RENAME TABLE
|
|
unlock tables;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reaping RENAME TABLE
|
|
--error ER_TABLE_EXISTS_ERROR
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reaping RENAME.
|
|
--reap
|
|
rename table t3 to t1;
|
|
|
|
--echo #
|
|
--echo # B) Now let us test compatibility in cases when both locks
|
|
--echo # are pending. I.e. let us test rules for priorities between
|
|
--echo # different types of metadata locks.
|
|
--echo #
|
|
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo #
|
|
--echo # 1) Check compatibility for pending SNW lock.
|
|
--echo #
|
|
--echo # Acquire SW lock in order to create pending SNW lock later.
|
|
begin;
|
|
insert into t1 values (1);
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Add pending SNW lock.
|
|
--echo # Sending:
|
|
--send alter table t1 add primary key (c1);
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Check that ALTER TABLE is waiting with pending SNW lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "alter table t1 add primary key (c1)";
|
|
--source include/wait_condition.inc
|
|
--echo # Check that S, SH and SR locks are compatible with pending SNW
|
|
handler t1 open t;
|
|
handler t close;
|
|
select column_name from information_schema.columns where
|
|
table_schema='test' and table_name='t1';
|
|
select count(*) from t1;
|
|
--echo # Check that SW is incompatible with pending SNW
|
|
--echo # Sending:
|
|
--send delete from t1 limit 1;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Check that the above DELETE is blocked because of pending SNW lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "delete from t1 limit 1";
|
|
--source include/wait_condition.inc
|
|
--echo # Unblock ALTER TABLE.
|
|
commit;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reaping ALTER.
|
|
--error ER_DUP_ENTRY
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reaping DELETE.
|
|
--reap
|
|
--echo #
|
|
--echo # We can't do similar check for SNW, SNRW and X locks because
|
|
--echo # they will also be blocked by active SW lock.
|
|
--echo #
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo #
|
|
--echo # 2) Check compatibility for pending SNRW lock.
|
|
--echo #
|
|
--echo # Acquire SR lock in order to create pending SNRW lock.
|
|
begin;
|
|
select count(*) from t1;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Add pending SNRW lock.
|
|
--echo # Sending:
|
|
--send lock table t1 write;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Check that LOCK TABLE is waiting with pending SNRW lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "lock table t1 write";
|
|
--source include/wait_condition.inc
|
|
--echo # Check that S and SH locks are compatible with pending SNRW
|
|
handler t1 open t;
|
|
handler t close;
|
|
select column_name from information_schema.columns where
|
|
table_schema='test' and table_name='t1';
|
|
--echo # Check that SR is incompatible with pending SNRW
|
|
--echo # Sending:
|
|
--send select count(*) from t1;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Check that the above SELECT is blocked because of pending SNRW lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "select count(*) from t1";
|
|
--source include/wait_condition.inc
|
|
--echo # Unblock LOCK TABLE.
|
|
commit;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reaping LOCK TABLE.
|
|
--reap
|
|
unlock tables;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reaping SELECT.
|
|
--reap
|
|
--echo # Restore pending SNRW lock.
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
begin;
|
|
select count(*) from t1;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Sending:
|
|
--send lock table t1 write;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Check that LOCK TABLE is waiting with pending SNRW lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "lock table t1 write";
|
|
--source include/wait_condition.inc
|
|
--echo # Check that SW is incompatible with pending SNRW
|
|
--echo # Sending:
|
|
--send insert into t1 values (1);
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Check that the above INSERT is blocked because of pending SNRW lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "insert into t1 values (1)";
|
|
--source include/wait_condition.inc
|
|
--echo # Unblock LOCK TABLE.
|
|
commit;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reaping LOCK TABLE.
|
|
--reap
|
|
unlock tables;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reaping INSERT.
|
|
--reap
|
|
--echo # Restore pending SNRW lock.
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
begin;
|
|
select count(*) from t1;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Sending:
|
|
--send lock table t1 write;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Check that LOCK TABLE is waiting with pending SNRW lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "lock table t1 write";
|
|
--source include/wait_condition.inc
|
|
--echo # Check that SNW is compatible with pending SNRW
|
|
--echo # So ALTER TABLE statements are not starved by LOCK TABLEs.
|
|
--error ER_DUP_ENTRY
|
|
alter table t1 add primary key (c1);
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Unblock LOCK TABLE.
|
|
commit;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reaping LOCK TABLE.
|
|
--reap
|
|
unlock tables;
|
|
--echo #
|
|
--echo # We can't do similar check for SNRW and X locks because
|
|
--echo # they will also be blocked by active SR lock.
|
|
--echo #
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo #
|
|
--echo # 3) Check compatibility for pending X lock.
|
|
--echo #
|
|
--echo # Acquire SR lock in order to create pending X lock.
|
|
begin;
|
|
select count(*) from t1;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Add pending X lock.
|
|
--echo # Sending:
|
|
--send rename table t1 to t2;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Check that RENAME TABLE is waiting with pending X lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "rename table t1 to t2";
|
|
--source include/wait_condition.inc
|
|
--echo # Check that SH locks are compatible with pending X
|
|
select column_name from information_schema.columns where
|
|
table_schema='test' and table_name='t1';
|
|
--echo # Check that S is incompatible with pending X
|
|
--echo # Sending:
|
|
--send handler t1 open;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Check that the above HANDLER OPEN is blocked because of pending X lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "handler t1 open";
|
|
--source include/wait_condition.inc
|
|
--echo # Unblock RENAME TABLE.
|
|
commit;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reaping RENAME TABLE.
|
|
--error ER_TABLE_EXISTS_ERROR
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reaping HANDLER t1 OPEN.
|
|
--reap
|
|
handler t1 close;
|
|
--echo # Restore pending X lock.
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
begin;
|
|
select count(*) from t1;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Add pending X lock.
|
|
--echo # Sending:
|
|
--send rename table t1 to t2;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Check that RENAME TABLE is waiting with pending X lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "rename table t1 to t2";
|
|
--source include/wait_condition.inc
|
|
--echo # Check that SR is incompatible with pending X
|
|
--echo # Sending:
|
|
--send select count(*) from t1;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Check that the above SELECT is blocked because of pending X lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "select count(*) from t1";
|
|
--source include/wait_condition.inc
|
|
--echo # Unblock RENAME TABLE.
|
|
commit;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reaping RENAME TABLE.
|
|
--error ER_TABLE_EXISTS_ERROR
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reaping SELECT.
|
|
--reap
|
|
--echo # Restore pending X lock.
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
begin;
|
|
select count(*) from t1;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Add pending X lock.
|
|
--echo # Sending:
|
|
--send rename table t1 to t2;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Check that RENAME TABLE is waiting with pending X lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "rename table t1 to t2";
|
|
--source include/wait_condition.inc
|
|
--echo # Check that SW is incompatible with pending X
|
|
--echo # Sending:
|
|
--send delete from t1 limit 1;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Check that the above DELETE is blocked because of pending X lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "delete from t1 limit 1";
|
|
--source include/wait_condition.inc
|
|
--echo # Unblock RENAME TABLE.
|
|
commit;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reaping RENAME TABLE.
|
|
--error ER_TABLE_EXISTS_ERROR
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reaping DELETE.
|
|
--reap
|
|
--echo # Restore pending X lock.
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
begin;
|
|
select count(*) from t1;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Add pending X lock.
|
|
--echo # Sending:
|
|
--send rename table t1 to t2;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Check that RENAME TABLE is waiting with pending X lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "rename table t1 to t2";
|
|
--source include/wait_condition.inc
|
|
--echo # Check that SNW is incompatible with pending X
|
|
--echo # Sending:
|
|
--send alter table t1 add primary key (c1);
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Check that the above ALTER TABLE is blocked because of pending X lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "alter table t1 add primary key (c1)";
|
|
--source include/wait_condition.inc
|
|
--echo # Unblock RENAME TABLE.
|
|
commit;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reaping RENAME TABLE.
|
|
--error ER_TABLE_EXISTS_ERROR
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reaping ALTER TABLE.
|
|
--error ER_DUP_ENTRY
|
|
--reap
|
|
--echo # Restore pending X lock.
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
handler t1 open;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Add pending X lock.
|
|
--echo # Sending:
|
|
--send rename table t1 to t2;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Check that RENAME TABLE is waiting with pending X lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "rename table t1 to t2";
|
|
--source include/wait_condition.inc
|
|
--echo # Check that SNRW is incompatible with pending X
|
|
--echo # Sending:
|
|
--send lock table t1 write;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con3'.
|
|
connection mdl_con3;
|
|
--echo # Check that the above LOCK TABLES is blocked because of pending X lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "lock table t1 write";
|
|
--source include/wait_condition.inc
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Unblock RENAME TABLE.
|
|
handler t1 close;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reaping RENAME TABLE.
|
|
--error ER_TABLE_EXISTS_ERROR
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reaping LOCK TABLES.
|
|
--reap
|
|
unlock tables;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
|
|
--echo #
|
|
--echo #
|
|
--echo # C) Now let us test how type-of-operation locks are handled in
|
|
--echo # transactional context. Obviously we are mostly interested
|
|
--echo # in conflicting types of locks.
|
|
--echo #
|
|
|
|
--echo #
|
|
--echo # 1) Let us check how various locks used within transactional
|
|
--echo # context interact with active/pending SNW lock.
|
|
--echo #
|
|
--echo # We start with case when we are acquiring lock on the table
|
|
--echo # which was not used in the transaction before.
|
|
begin;
|
|
select count(*) from t1;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Create an active SNW lock on t2.
|
|
--echo # We have to use DEBUG_SYNC facility as otherwise SNW lock
|
|
--echo # will be immediately released (or upgraded to X lock).
|
|
insert into t2 values (1), (1);
|
|
set debug_sync= 'after_open_table_mdl_shared SIGNAL locked WAIT_FOR finish';
|
|
--echo # Sending:
|
|
--send alter table t2 add primary key (c1);
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
set debug_sync= 'now WAIT_FOR locked';
|
|
--echo # SR lock should be acquired without any waiting.
|
|
select count(*) from t2;
|
|
commit;
|
|
--echo # Now let us check that we will wait in case of SW lock.
|
|
begin;
|
|
select count(*) from t1;
|
|
--echo # Sending:
|
|
--send insert into t2 values (1);
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Check that the above INSERT is blocked.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "insert into t2 values (1)";
|
|
--source include/wait_condition.inc
|
|
--echo # Unblock ALTER TABLE and thus INSERT.
|
|
set debug_sync= 'now SIGNAL finish';
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reap ALTER TABLE.
|
|
--error ER_DUP_ENTRY
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reap INSERT.
|
|
--reap
|
|
commit;
|
|
--echo #
|
|
--echo # Now let us see what happens when we are acquiring lock on the table
|
|
--echo # which is already used in transaction.
|
|
--echo #
|
|
--echo # *) First, case when transaction which has SR lock on the table also
|
|
--echo # locked in SNW mode acquires yet another SR lock and then tries
|
|
--echo # to acquire SW lock.
|
|
begin;
|
|
select count(*) from t1;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Create an active SNW lock on t1.
|
|
set debug_sync= 'after_open_table_mdl_shared SIGNAL locked WAIT_FOR finish';
|
|
--echo # Sending:
|
|
--send alter table t1 add primary key (c1);
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
set debug_sync= 'now WAIT_FOR locked';
|
|
--echo # We should still be able to get SR lock without waiting.
|
|
select count(*) from t1;
|
|
--echo # Since the above ALTER TABLE is not upgrading SNW lock to X by waiting
|
|
--echo # for SW lock we won't create deadlock.
|
|
--echo # So the below INSERT should not end-up with ER_LOCK_DEADLOCK error.
|
|
--echo # Sending:
|
|
--send insert into t1 values (1);
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Check that the above INSERT is blocked.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "insert into t1 values (1)";
|
|
--source include/wait_condition.inc
|
|
--echo # Unblock ALTER TABLE and thus INSERT.
|
|
set debug_sync= 'now SIGNAL finish';
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reap ALTER TABLE.
|
|
--error ER_DUP_ENTRY
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reap INSERT.
|
|
--reap
|
|
commit;
|
|
--echo #
|
|
--echo # **) Now test in which transaction that has SW lock on the table
|
|
--echo # against which there is pending SNW lock acquires SR and SW
|
|
--echo # locks on this table.
|
|
--echo #
|
|
begin;
|
|
insert into t1 values (1);
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Create pending SNW lock on t1.
|
|
--echo # Sending:
|
|
--send alter table t1 add primary key (c1);
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Wait until ALTER TABLE starts waiting for SNW lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "alter table t1 add primary key (c1)";
|
|
--source include/wait_condition.inc
|
|
--echo # We should still be able to get both SW and SR locks without waiting.
|
|
select count(*) from t1;
|
|
delete from t1 limit 1;
|
|
--echo # Unblock ALTER TABLE.
|
|
commit;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reap ALTER TABLE.
|
|
--error ER_DUP_ENTRY
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo #
|
|
--echo # 2) Now similar tests for active SNW lock which is being upgraded
|
|
--echo # to X lock.
|
|
--echo #
|
|
--echo # Again we start with case when we are acquiring lock on the
|
|
--echo # table which was not used in the transaction before.
|
|
begin;
|
|
select count(*) from t1;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Start transaction which will prevent SNW -> X upgrade from
|
|
--echo # completing immediately.
|
|
begin;
|
|
select count(*) from t2;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Create SNW lock pending upgrade to X on t2.
|
|
--echo # Sending:
|
|
--send alter table t2 add column c2 int;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Wait until ALTER TABLE starts waiting X lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "alter table t2 add column c2 int";
|
|
--source include/wait_condition.inc
|
|
--echo # Check that attempt to acquire SR lock on t2 causes waiting.
|
|
--echo # Sending:
|
|
--send select count(*) from t2;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Check that the above SELECT is blocked.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "select count(*) from t2";
|
|
--source include/wait_condition.inc
|
|
--echo # Unblock ALTER TABLE.
|
|
commit;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reap ALTER TABLE.
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reap SELECT.
|
|
--reap
|
|
commit;
|
|
--echo # Do similar check for SW lock.
|
|
begin;
|
|
select count(*) from t1;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Start transaction which will prevent SNW -> X upgrade from
|
|
--echo # completing immediately.
|
|
begin;
|
|
select count(*) from t2;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Create SNW lock pending upgrade to X on t2.
|
|
--echo # Sending:
|
|
--send alter table t2 drop column c2;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Wait until ALTER TABLE starts waiting X lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "alter table t2 drop column c2";
|
|
--source include/wait_condition.inc
|
|
--echo # Check that attempt to acquire SW lock on t2 causes waiting.
|
|
--echo # Sending:
|
|
--send insert into t2 values (1);
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Check that the above INSERT is blocked.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "insert into t2 values (1)";
|
|
--source include/wait_condition.inc
|
|
--echo # Unblock ALTER TABLE.
|
|
commit;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reap ALTER TABLE.
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reap INSERT.
|
|
--reap
|
|
commit;
|
|
--echo #
|
|
--echo # Test for the case in which we are acquiring lock on the table
|
|
--echo # which is already used in transaction.
|
|
--echo #
|
|
begin;
|
|
select count(*) from t1;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Create SNW lock pending upgrade to X.
|
|
--echo # Sending:
|
|
--send alter table t1 add column c2 int;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Wait until ALTER TABLE starts waiting X lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "alter table t1 add column c2 int";
|
|
--source include/wait_condition.inc
|
|
--echo # Check that transaction is still able to acquire SR lock.
|
|
select count(*) from t1;
|
|
--echo # Waiting trying to acquire SW lock will cause deadlock and
|
|
--echo # therefore should cause an error.
|
|
--error ER_LOCK_DEADLOCK
|
|
delete from t1 limit 1;
|
|
--echo # Unblock ALTER TABLE.
|
|
commit;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reap ALTER TABLE.
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo #
|
|
--echo # 3) Check how various locks used within transactional context
|
|
--echo # interact with active/pending SNRW lock.
|
|
--echo #
|
|
--echo # Once again we start with case when we are acquiring lock on
|
|
--echo # the table which was not used in the transaction before.
|
|
begin;
|
|
select count(*) from t1;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
lock table t2 write;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Attempt to acquire SR should be blocked. It should
|
|
--echo # not cause errors as it does not creates deadlock.
|
|
--echo # Sending:
|
|
--send select count(*) from t2;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Check that the above SELECT is blocked
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "select count(*) from t2";
|
|
--source include/wait_condition.inc
|
|
--echo # Unblock SELECT.
|
|
unlock tables;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reap SELECT.
|
|
--reap
|
|
commit;
|
|
--echo # Repeat the same test for SW lock.
|
|
begin;
|
|
select count(*) from t1;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
lock table t2 write;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Again attempt to acquire SW should be blocked and should
|
|
--echo # not cause any errors.
|
|
--echo # Sending:
|
|
--send delete from t2 limit 1;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Check that the above DELETE is blocked
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "delete from t2 limit 1";
|
|
--source include/wait_condition.inc
|
|
--echo # Unblock DELETE.
|
|
unlock tables;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reap DELETE.
|
|
--reap
|
|
commit;
|
|
--echo #
|
|
--echo # Now coverage for the case in which we are acquiring lock on
|
|
--echo # the table which is already used in transaction and against
|
|
--echo # which there is a pending SNRW lock request.
|
|
--echo #
|
|
--echo # *) Let us start with case when transaction has only a SR lock.
|
|
--echo #
|
|
begin;
|
|
select count(*) from t1;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Sending:
|
|
--send lock table t1 write;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Wait until LOCK TABLE is blocked creating pending request for X lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "lock table t1 write";
|
|
--source include/wait_condition.inc
|
|
--echo # Check that another instance of SR lock is granted without waiting.
|
|
select count(*) from t1;
|
|
--echo # Attempt to wait for SW lock will lead to deadlock, thus
|
|
--echo # the below statement should end with ER_LOCK_DEADLOCK error.
|
|
--error ER_LOCK_DEADLOCK
|
|
delete from t1 limit 1;
|
|
--echo # Unblock LOCK TABLES.
|
|
commit;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reap LOCK TABLES.
|
|
--reap
|
|
unlock tables;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo #
|
|
--echo # **) Now case when transaction has a SW lock.
|
|
--echo #
|
|
begin;
|
|
delete from t1 limit 1;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Sending:
|
|
--send lock table t1 write;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Wait until LOCK TABLE is blocked creating pending request for X lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "lock table t1 write";
|
|
--source include/wait_condition.inc
|
|
--echo # Check that both SR and SW locks are granted without waiting
|
|
--echo # and errors.
|
|
select count(*) from t1;
|
|
insert into t1 values (1, 1);
|
|
--echo # Unblock LOCK TABLES.
|
|
commit;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reap LOCK TABLES.
|
|
--reap
|
|
unlock tables;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo #
|
|
--echo # 4) Check how various locks used within transactional context
|
|
--echo # interact with active/pending X lock.
|
|
--echo #
|
|
--echo # As usual we start with case when we are acquiring lock on
|
|
--echo # the table which was not used in the transaction before.
|
|
begin;
|
|
select count(*) from t1;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Start transaction which will prevent X lock from going away
|
|
--echo # immediately.
|
|
begin;
|
|
select count(*) from t2;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Create pending X lock on t2.
|
|
--echo # Sending:
|
|
--send rename table t2 to t3;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Wait until RENAME TABLE starts waiting with pending X lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "rename table t2 to t3";
|
|
--source include/wait_condition.inc
|
|
--echo # Check that attempt to acquire SR lock on t2 causes waiting.
|
|
--echo # Sending:
|
|
--send select count(*) from t2;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Check that the above SELECT is blocked.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "select count(*) from t2";
|
|
--source include/wait_condition.inc
|
|
--echo # Unblock RENAME TABLE.
|
|
commit;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reap RENAME TABLE.
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reap SELECT.
|
|
--error ER_NO_SUCH_TABLE
|
|
--reap
|
|
commit;
|
|
rename table t3 to t2;
|
|
--echo # The same test for SW lock.
|
|
begin;
|
|
select count(*) from t1;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Start transaction which will prevent X lock from going away
|
|
--echo # immediately.
|
|
begin;
|
|
select count(*) from t2;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Create pending X lock on t2.
|
|
--echo # Sending:
|
|
--send rename table t2 to t3;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Wait until RENAME TABLE starts waiting with pending X lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "rename table t2 to t3";
|
|
--source include/wait_condition.inc
|
|
--echo # Check that attempt to acquire SW lock on t2 causes waiting.
|
|
--echo # Sending:
|
|
--send delete from t2 limit 1;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con2'.
|
|
connection mdl_con2;
|
|
--echo # Check that the above DELETE is blocked.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "delete from t2 limit 1";
|
|
--source include/wait_condition.inc
|
|
--echo # Unblock RENAME TABLE.
|
|
commit;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reap RENAME TABLE.
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reap DELETE.
|
|
--error ER_NO_SUCH_TABLE
|
|
--reap
|
|
commit;
|
|
rename table t3 to t2;
|
|
--echo #
|
|
--echo # Coverage for the case in which we are acquiring lock on
|
|
--echo # the table which is already used in transaction and against
|
|
--echo # which there is a pending X lock request.
|
|
--echo #
|
|
--echo # *) The first case is when transaction has only a SR lock.
|
|
--echo #
|
|
begin;
|
|
select count(*) from t1;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Sending:
|
|
--send rename table t1 to t2;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Wait until RENAME TABLE is blocked creating pending request for X lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "rename table t1 to t2";
|
|
--source include/wait_condition.inc
|
|
--echo # Check that another instance of SR lock is granted without waiting.
|
|
select count(*) from t1;
|
|
--echo # Attempt to wait for SW lock will lead to deadlock, thus
|
|
--echo # the below statement should end with ER_LOCK_DEADLOCK error.
|
|
--error ER_LOCK_DEADLOCK
|
|
delete from t1 limit 1;
|
|
--echo # Unblock RENAME TABLE.
|
|
commit;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reap RENAME TABLE.
|
|
--error ER_TABLE_EXISTS_ERROR
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo #
|
|
--echo # **) The second case is when transaction has a SW lock.
|
|
--echo #
|
|
begin;
|
|
delete from t1 limit 1;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Sending:
|
|
--send rename table t1 to t2;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Wait until RENAME TABLE is blocked creating pending request for X lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "rename table t1 to t2";
|
|
--source include/wait_condition.inc
|
|
--echo # Check that both SR and SW locks are granted without waiting
|
|
--echo # and errors.
|
|
select count(*) from t1;
|
|
insert into t1 values (1, 1);
|
|
--echo # Unblock RENAME TABLE.
|
|
commit;
|
|
--echo #
|
|
--echo # Switching to connection 'mdl_con1'.
|
|
connection mdl_con1;
|
|
--echo # Reap RENAME TABLE.
|
|
--error ER_TABLE_EXISTS_ERROR
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
|
|
--echo # Clean-up.
|
|
disconnect mdl_con1;
|
|
disconnect mdl_con2;
|
|
disconnect mdl_con3;
|
|
set debug_sync= 'RESET';
|
|
drop table t1, t2;
|
|
|
|
|
|
--echo #
|
|
--echo # Additional coverage for some scenarios in which not quite
|
|
--echo # correct use of S metadata locks by HANDLER statement might
|
|
--echo # have caused deadlocks.
|
|
--echo #
|
|
--disable_warnings
|
|
drop table if exists t1, t2;
|
|
--enable_warnings
|
|
connect(handler_con1,localhost,root,,);
|
|
connect(handler_con2,localhost,root,,);
|
|
connection default;
|
|
create table t1 (i int);
|
|
create table t2 (j int);
|
|
insert into t1 values (1);
|
|
|
|
--echo #
|
|
--echo # First, check scenario in which we upgrade SNRW lock to X lock
|
|
--echo # on a table while having HANDLER READ trying to acquire TL_READ
|
|
--echo # on the same table.
|
|
--echo #
|
|
handler t1 open;
|
|
--echo #
|
|
--echo # Switching to connection 'handler_con1'.
|
|
connection handler_con1;
|
|
lock table t1 write;
|
|
--echo # Upgrade SNRW to X lock.
|
|
--echo # Sending:
|
|
--send alter table t1 add column j int;
|
|
--echo #
|
|
--echo # Switching to connection 'handler_con2'.
|
|
connection handler_con2;
|
|
--echo # Wait until ALTER is blocked during upgrade.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "alter table t1 add column j int";
|
|
--source include/wait_condition.inc
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # The below statement should not cause deadlock.
|
|
--send handler t1 read first;
|
|
--echo #
|
|
--echo # Switching to connection 'handler_con1'.
|
|
connection handler_con1;
|
|
--echo # Reap ALTER TABLE.
|
|
--reap
|
|
unlock tables;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reap HANDLER READ.
|
|
--reap
|
|
handler t1 close;
|
|
|
|
--echo #
|
|
--echo # Now, check scenario in which upgrade of SNRW lock to X lock
|
|
--echo # can be blocked by HANDLER which is open in connection currently
|
|
--echo # waiting to get table-lock owned by connection doing upgrade.
|
|
--echo #
|
|
handler t1 open;
|
|
--echo #
|
|
--echo # Switching to connection 'handler_con1'.
|
|
connection handler_con1;
|
|
lock table t1 write, t2 read;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Execute statement which will be blocked on table-level lock
|
|
--echo # owned by connection 'handler_con1'.
|
|
--echo # Sending:
|
|
--send insert into t2 values (1);
|
|
--echo #
|
|
--echo # Switching to connection 'handler_con1'.
|
|
connection handler_con1;
|
|
--echo # Wait until INSERT is blocked on table-level lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Table lock" and info = "insert into t2 values (1)";
|
|
--source include/wait_condition.inc
|
|
--echo # The below statement should not cause deadlock.
|
|
alter table t1 drop column j;
|
|
unlock tables;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reap INSERT.
|
|
--reap
|
|
handler t1 close;
|
|
|
|
--echo #
|
|
--echo # Then, check the scenario in which upgrade of SNRW lock to X
|
|
--echo # lock is blocked by HANDLER which is open in connection currently
|
|
--echo # waiting to get SW lock on the same table.
|
|
--echo #
|
|
handler t1 open;
|
|
--echo #
|
|
--echo # Switching to connection 'handler_con1'.
|
|
connection handler_con1;
|
|
lock table t1 write;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # The below insert should be blocked because active SNRW lock on 't1'.
|
|
--echo # Sending:
|
|
--send insert into t1 values (1);
|
|
--echo #
|
|
--echo # Switching to connection 'handler_con1'.
|
|
connection handler_con1;
|
|
--echo # Wait until INSERT is blocked because of SNRW lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "insert into t1 values (1)";
|
|
--echo # The below ALTER TABLE will be blocked because of presence of HANDLER.
|
|
--echo # Sending:
|
|
--send alter table t1 add column j int;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # INSERT should be chosen as victim for resolving deadlock.
|
|
--echo # Reaping INSERT.
|
|
--error ER_LOCK_DEADLOCK
|
|
--reap
|
|
--echo # Close HANDLER to unblock ALTER TABLE.
|
|
handler t1 close;
|
|
--echo #
|
|
--echo # Switching to connection 'handler_con1'.
|
|
connection handler_con1;
|
|
--echo # Reaping ALTER TABLE.
|
|
--reap
|
|
unlock tables;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
|
|
--echo #
|
|
--echo # Finally, test in which upgrade of SNRW lock to X lock is blocked
|
|
--echo # by HANDLER which is open in connection currently waiting to get
|
|
--echo # SR lock on the table on which lock is upgraded.
|
|
--echo #
|
|
handler t1 open;
|
|
--echo #
|
|
--echo # Switching to connection 'handler_con1'.
|
|
connection handler_con1;
|
|
lock table t1 write, t2 write;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # The below insert should be blocked because active SNRW lock on 't1'.
|
|
--echo # Sending:
|
|
--send insert into t2 values (1);
|
|
--echo #
|
|
--echo # Switching to connection 'handler_con1'.
|
|
connection handler_con1;
|
|
--echo # Wait until INSERT is blocked because of SNRW lock.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "insert into t2 values (1)";
|
|
--echo # The below ALTER TABLE will be blocked because of presence of HANDLER.
|
|
--echo # Sending:
|
|
--send alter table t1 drop column j;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # INSERT should be chosen as victim for resolving deadlock.
|
|
--echo # Reaping INSERT.
|
|
--error ER_LOCK_DEADLOCK
|
|
--reap
|
|
--echo # Close HANDLER to unblock ALTER TABLE.
|
|
handler t1 close;
|
|
--echo #
|
|
--echo # Switching to connection 'handler_con1'.
|
|
connection handler_con1;
|
|
--echo # Reaping ALTER TABLE.
|
|
--reap
|
|
unlock tables;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
|
|
--echo # Clean-up.
|
|
disconnect handler_con1;
|
|
disconnect handler_con2;
|
|
drop tables t1, t2;
|
|
|
|
|
|
--echo #
|
|
--echo # Test coverage for basic deadlock detection in metadata
|
|
--echo # locking subsystem.
|
|
--echo #
|
|
--disable_warnings
|
|
drop tables if exists t0, t1, t2, t3, t4, t5;
|
|
--enable_warnings
|
|
|
|
connect(deadlock_con1,localhost,root,,);
|
|
connect(deadlock_con2,localhost,root,,);
|
|
connect(deadlock_con3,localhost,root,,);
|
|
connection default;
|
|
create table t1 (i int);
|
|
create table t2 (j int);
|
|
create table t3 (k int);
|
|
create table t4 (k int);
|
|
|
|
--echo #
|
|
--echo # Test for the case in which no deadlock occurs.
|
|
--echo #
|
|
|
|
--echo #
|
|
--echo # Switching to connection 'deadlock_con1'.
|
|
connection deadlock_con1;
|
|
begin;
|
|
insert into t1 values (1);
|
|
|
|
--echo #
|
|
--echo # Switching to connection 'deadlock_con2'.
|
|
connection deadlock_con2;
|
|
begin;
|
|
insert into t2 values (1);
|
|
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Send:
|
|
--send rename table t2 to t0, t3 to t2, t0 to t3;
|
|
|
|
--echo #
|
|
--echo # Switching to connection 'deadlock_con1'.
|
|
connection deadlock_con1;
|
|
--echo # Wait until the above RENAME TABLE is blocked because it has to wait
|
|
--echo # for 'deadlock_con2' which holds shared metadata lock on 't2'.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "rename table t2 to t0, t3 to t2, t0 to t3";
|
|
--source include/wait_condition.inc
|
|
--echo # The below statement should wait for exclusive metadata lock
|
|
--echo # on 't2' to go away and should not produce ER_LOCK_DEADLOCK
|
|
--echo # as no deadlock is possible in this situation.
|
|
--echo # Send:
|
|
--send select * from t2;
|
|
|
|
--echo #
|
|
--echo # Switching to connection 'deadlock_con2'.
|
|
connection deadlock_con2;
|
|
--echo # Wait until the above SELECT * FROM t2 is starts waiting
|
|
--echo # for an exclusive metadata lock to go away.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "select * from t2";
|
|
--source include/wait_condition.inc
|
|
--echo #
|
|
--echo # Unblock RENAME TABLE by releasing shared metadata lock on t2.
|
|
commit;
|
|
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reap RENAME TABLE.
|
|
--reap
|
|
|
|
--echo #
|
|
--echo # Switching to connection 'deadlock_con1'.
|
|
connection deadlock_con1;
|
|
--echo # Reap SELECT.
|
|
--reap
|
|
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo #
|
|
--echo # Let us check that in the process of waiting for conflicting lock
|
|
--echo # on table 't2' to go away transaction in connection 'deadlock_con1'
|
|
--echo # has not released metadata lock on table 't1'.
|
|
--echo # Send:
|
|
--send rename table t1 to t0, t3 to t1, t0 to t3;
|
|
|
|
--echo #
|
|
--echo # Switching to connection 'deadlock_con1'.
|
|
connection deadlock_con1;
|
|
--echo # Wait until the above RENAME TABLE is blocked because it has to wait
|
|
--echo # for 'deadlock_con1' which should still hold shared metadata lock on
|
|
--echo # table 't1'.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "rename table t1 to t0, t3 to t1, t0 to t3";
|
|
--source include/wait_condition.inc
|
|
--echo # Commit transaction to unblock RENAME TABLE.
|
|
commit;
|
|
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reap RENAME TABLE.
|
|
--reap
|
|
|
|
--echo #
|
|
--echo # Test for case when deadlock occurs and should be detected immediately.
|
|
--echo #
|
|
|
|
--echo #
|
|
--echo # Switching to connection 'deadlock_con1'.
|
|
connection deadlock_con1;
|
|
begin;
|
|
insert into t2 values (2);
|
|
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Send:
|
|
--send rename table t2 to t0, t1 to t2, t0 to t1;
|
|
|
|
--echo #
|
|
--echo # Switching to connection 'deadlock_con1'.
|
|
connection deadlock_con1;
|
|
--echo # Wait until the above RENAME TABLE is blocked because it has to wait
|
|
--echo # for 'deadlock_con1' which holds shared metadata lock on 't2'.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "rename table t2 to t0, t1 to t2, t0 to t1";
|
|
--source include/wait_condition.inc
|
|
--echo #
|
|
--echo # The below statement should not wait as doing so will cause deadlock.
|
|
--echo # Instead it should fail and emit ER_LOCK_DEADLOCK statement.
|
|
--error ER_LOCK_DEADLOCK
|
|
select * from t1;
|
|
|
|
--echo #
|
|
--echo # Let us check that failure of the above statement has not released
|
|
--echo # metadata lock on table 't1', i.e. that RENAME TABLE is still blocked.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "rename table t2 to t0, t1 to t2, t0 to t1";
|
|
--source include/wait_condition.inc
|
|
--echo # Commit transaction to unblock RENAME TABLE.
|
|
commit;
|
|
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reap RENAME TABLE.
|
|
--reap
|
|
|
|
--echo #
|
|
--echo # Test for the case in which deadlock also occurs but not immediately.
|
|
--echo #
|
|
|
|
--echo #
|
|
--echo # Switching to connection 'deadlock_con1'.
|
|
connection deadlock_con1;
|
|
begin;
|
|
insert into t2 values (1);
|
|
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
lock table t1 write;
|
|
|
|
--echo #
|
|
--echo # Switching to connection 'deadlock_con1'.
|
|
connection deadlock_con1;
|
|
--echo # The below SELECT statement should wait for metadata lock
|
|
--echo # on table 't1' and should not produce ER_LOCK_DEADLOCK
|
|
--echo # immediately as no deadlock is possible at the moment.
|
|
--send select * from t1;
|
|
|
|
--echo #
|
|
--echo # Switching to connection 'deadlock_con2'.
|
|
connection deadlock_con2;
|
|
--echo # Wait until the above SELECT * FROM t1 is starts waiting
|
|
--echo # for an UNRW metadata lock to go away.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "select * from t1";
|
|
--source include/wait_condition.inc
|
|
|
|
--echo # Send RENAME TABLE statement that will deadlock with the
|
|
--echo # SELECT statement and thus should abort the latter.
|
|
--send rename table t1 to t0, t2 to t1, t0 to t2;
|
|
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Wait till above RENAME TABLE is blocked while holding
|
|
--echo # pending X lock on t1.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "rename table t1 to t0, t2 to t1, t0 to t2";
|
|
--source include/wait_condition.inc
|
|
--echo # Allow the above RENAME TABLE to acquire lock on t1 and
|
|
--echo # create pending lock on t2 thus creating deadlock.
|
|
unlock tables;
|
|
|
|
--echo #
|
|
--echo # Switching to connection 'deadlock_con1'.
|
|
connection deadlock_con1;
|
|
--echo # Since the latest RENAME TABLE entered in deadlock with SELECT
|
|
--echo # statement the latter should be aborted and emit ER_LOCK_DEADLOCK
|
|
--echo # error.
|
|
--echo # Reap SELECT * FROM t1.
|
|
--error ER_LOCK_DEADLOCK
|
|
--reap
|
|
|
|
--echo #
|
|
--echo # Again let us check that failure of the SELECT statement has not
|
|
--echo # released metadata lock on table 't2', i.e. that the latest RENAME
|
|
--echo # is blocked.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "rename table t1 to t0, t2 to t1, t0 to t2";
|
|
--source include/wait_condition.inc
|
|
--echo # Commit transaction to unblock this RENAME TABLE.
|
|
commit;
|
|
|
|
--echo #
|
|
--echo # Switching to connection 'deadlock_con2'.
|
|
connection deadlock_con2;
|
|
--echo # Reap RENAME TABLE ... .
|
|
--reap;
|
|
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
|
|
drop tables t1, t2, t3, t4;
|
|
|
|
--echo #
|
|
--echo # Now, test case which shows that deadlock detection empiric
|
|
--echo # also takes into account requests for metadata lock upgrade.
|
|
--echo #
|
|
create table t1 (i int);
|
|
insert into t1 values (1);
|
|
--echo # Avoid race which occurs when SELECT in 'deadlock_con1' connection
|
|
--echo # accesses table before the above INSERT unlocks the table and thus
|
|
--echo # its result becomes visible to other connections.
|
|
select * from t1;
|
|
|
|
--echo #
|
|
--echo # Switching to connection 'deadlock_con1'.
|
|
connection deadlock_con1;
|
|
begin;
|
|
select * from t1;
|
|
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Send:
|
|
--send alter table t1 add column j int, rename to t2;
|
|
|
|
--echo #
|
|
--echo # Switching to connection 'deadlock_con1'.
|
|
connection deadlock_con1;
|
|
--echo # Wait until the above ALTER TABLE ... RENAME acquires exclusive
|
|
--echo # metadata lock on 't2' and starts waiting for connection
|
|
--echo # 'deadlock_con1' which holds shared lock on 't1'.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "alter table t1 add column j int, rename to t2";
|
|
--source include/wait_condition.inc
|
|
|
|
--echo # The below statement should not wait as it will cause deadlock.
|
|
--echo # An appropriate error should be reported instead.
|
|
--error ER_LOCK_DEADLOCK
|
|
select * from t2;
|
|
|
|
--echo # Again let us check that failure of the above statement has not
|
|
--echo # released all metadata locks in connection 'deadlock_con1' and
|
|
--echo # so ALTER TABLE ... RENAME is still blocked.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "alter table t1 add column j int, rename to t2";
|
|
--source include/wait_condition.inc
|
|
|
|
--echo # Commit transaction to unblock ALTER TABLE ... RENAME.
|
|
commit;
|
|
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reap ALTER TABLE ... RENAME.
|
|
--reap
|
|
|
|
drop table t2;
|
|
|
|
disconnect deadlock_con1;
|
|
disconnect deadlock_con2;
|
|
disconnect deadlock_con3;
|
|
|
|
|
|
--echo #
|
|
--echo # Test for bug #46748 "Assertion in MDL_context::wait_for_locks()
|
|
--echo # on INSERT + CREATE TRIGGER".
|
|
--echo #
|
|
--disable_warnings
|
|
drop tables if exists t1, t2, t3, t4, t5;
|
|
--enable_warnings
|
|
--echo # Let us simulate scenario in which we open some tables from extended
|
|
--echo # part of prelocking set but then encounter conflicting metadata lock,
|
|
--echo # so have to back-off and wait for it to go away.
|
|
connect (con1root,localhost,root,,test,,);
|
|
connect (con2root,localhost,root,,test,,);
|
|
connection default;
|
|
create table t1 (i int);
|
|
create table t2 (j int);
|
|
create table t3 (k int);
|
|
create table t4 (l int);
|
|
create trigger t1_bi before insert on t1 for each row
|
|
insert into t2 values (new.i);
|
|
create trigger t2_bi before insert on t2 for each row
|
|
insert into t3 values (new.j);
|
|
--echo #
|
|
--echo # Switching to connection 'con1root'.
|
|
connection con1root;
|
|
lock tables t4 read;
|
|
--echo #
|
|
--echo # Switching to connection 'con2root'.
|
|
connection con2root;
|
|
--echo # Send :
|
|
--send rename table t3 to t5, t4 to t3;
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Wait until the above RENAME TABLE adds pending requests for exclusive
|
|
--echo # metadata lock on its tables and blocks due to 't4' being used by LOCK
|
|
--echo # TABLES.
|
|
let $wait_condition= select count(*)= 1 from information_schema.processlist
|
|
where state= 'Waiting for table' and
|
|
info='rename table t3 to t5, t4 to t3';
|
|
--source include/wait_condition.inc
|
|
--echo # Send :
|
|
--send insert into t1 values (1);
|
|
--echo #
|
|
--echo # Switching to connection 'con1root'.
|
|
connection con1root;
|
|
--echo # Wait until INSERT statement waits due to encountering pending
|
|
--echo # exclusive metadata lock on 't3'.
|
|
let $wait_condition= select count(*)= 1 from information_schema.processlist
|
|
where state= 'Waiting for table' and
|
|
info='insert into t1 values (1)';
|
|
--source include/wait_condition.inc
|
|
unlock tables;
|
|
--echo #
|
|
--echo # Switching to connection 'con2root'.
|
|
connection con2root;
|
|
--echo # Reap RENAME TABLE.
|
|
--reap
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reap INSERT.
|
|
--reap
|
|
--echo # Clean-up.
|
|
disconnect con1root;
|
|
disconnect con2root;
|
|
drop tables t1, t2, t3, t5;
|
|
|
|
|
|
--echo #
|
|
--echo # Bug#42546 - Backup: RESTORE fails, thinking it finds an existing table
|
|
--echo #
|
|
|
|
--disable_warnings
|
|
DROP TABLE IF EXISTS t1;
|
|
--enable_warnings
|
|
set @save_log_output=@@global.log_output;
|
|
set global log_output=file;
|
|
|
|
connect(con2, localhost, root,,);
|
|
|
|
--echo #
|
|
--echo # Test 1: CREATE TABLE
|
|
--echo #
|
|
|
|
--echo # Connection 2
|
|
connection con2;
|
|
--echo # Start insert on the not-yet existing table
|
|
--echo # Wait after taking the MDL lock
|
|
SET DEBUG_SYNC= 'after_open_table_mdl_shared SIGNAL locked WAIT_FOR finish';
|
|
--send INSERT INTO t1 VALUES(1,"def")
|
|
|
|
--echo # Connection 1
|
|
connection default;
|
|
SET DEBUG_SYNC= 'now WAIT_FOR locked';
|
|
--echo # Now INSERT has a MDL on the non-existent table t1.
|
|
|
|
--echo #
|
|
--echo # Continue the INSERT once CREATE waits for exclusive lock
|
|
SET DEBUG_SYNC= 'mdl_acquire_lock_wait SIGNAL finish';
|
|
--echo # Try to create that table.
|
|
--send CREATE TABLE t1 (c1 INT, c2 VARCHAR(100), KEY(c1))
|
|
|
|
--echo # Connection 2
|
|
--echo # Insert fails
|
|
connection con2;
|
|
--error ER_NO_SUCH_TABLE
|
|
--reap
|
|
|
|
--echo # Connection 1
|
|
connection default;
|
|
--reap;
|
|
SET DEBUG_SYNC= 'RESET';
|
|
SHOW TABLES;
|
|
|
|
--disable_warnings
|
|
DROP TABLE IF EXISTS t1;
|
|
--enable_warnings
|
|
|
|
--echo #
|
|
--echo # Test 2: CREATE TABLE LIKE
|
|
--echo #
|
|
|
|
CREATE TABLE t2 (c1 INT, c2 VARCHAR(100), KEY(c1));
|
|
|
|
--echo # Connection 2
|
|
connection con2;
|
|
--echo # Start insert on the not-yet existing table
|
|
--echo # Wait after taking the MDL
|
|
SET DEBUG_SYNC= 'after_open_table_mdl_shared SIGNAL locked WAIT_FOR finish';
|
|
--send INSERT INTO t1 VALUES(1,"def")
|
|
|
|
--echo # Connection 1
|
|
connection default;
|
|
SET DEBUG_SYNC= 'now WAIT_FOR locked';
|
|
--echo # Now INSERT has a MDL on the non-existent table t1.
|
|
|
|
--echo #
|
|
--echo # Continue the INSERT once CREATE waits for exclusive lock
|
|
SET DEBUG_SYNC= 'mdl_acquire_lock_wait SIGNAL finish';
|
|
--echo # Try to create that table.
|
|
--send CREATE TABLE t1 LIKE t2
|
|
|
|
--echo # Connection 2
|
|
--echo # Insert fails
|
|
connection con2;
|
|
--error ER_NO_SUCH_TABLE
|
|
--reap
|
|
|
|
--echo # Connection 1
|
|
connection default;
|
|
--reap
|
|
SET DEBUG_SYNC= 'RESET';
|
|
SHOW TABLES;
|
|
|
|
DROP TABLE t2;
|
|
disconnect con2;
|
|
--disable_warnings
|
|
DROP TABLE IF EXISTS t1;
|
|
--enable_warnings
|
|
|
|
set global log_output=@save_log_output;
|
|
|
|
|
|
--echo #
|
|
--echo # Bug #46044 "MDL deadlock on LOCK TABLE + CREATE TABLE HIGH_PRIORITY
|
|
--echo # FOR UPDATE"
|
|
--echo #
|
|
--disable_warnings
|
|
drop tables if exists t1, t2;
|
|
--enable_warnings
|
|
connect (con46044, localhost, root,,);
|
|
connect (con46044_2, localhost, root,,);
|
|
connection default;
|
|
create table t1 (i int);
|
|
|
|
--echo # Let us check that we won't deadlock if during filling
|
|
--echo # of I_S table we encounter conflicting metadata lock
|
|
--echo # which owner is in its turn waiting for our connection.
|
|
lock tables t1 read;
|
|
|
|
--echo # Switching to connection 'con46044'.
|
|
connection con46044;
|
|
--echo # Sending:
|
|
--send create table t2 select * from t1 for update;
|
|
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Waiting until CREATE TABLE ... SELECT ... is blocked.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Table lock" and info = "create table t2 select * from t1 for update";
|
|
--source include/wait_condition.inc
|
|
|
|
--echo # First let us check that SHOW FIELDS/DESCRIBE doesn't
|
|
--echo # gets blocked and emits and error.
|
|
--error ER_WARN_I_S_SKIPPED_TABLE
|
|
show fields from t2;
|
|
|
|
--echo # Now test for I_S query which reads only .FRMs.
|
|
--echo #
|
|
--echo # Query below should only emit a warning.
|
|
select column_name from information_schema.columns
|
|
where table_schema='test' and table_name='t2';
|
|
|
|
--echo # Finally, test for I_S query which does full-blown table open.
|
|
--echo #
|
|
--echo # Query below should not be blocked. Warning message should be
|
|
--echo # stored in the 'table_comment' column.
|
|
select table_name, table_type, auto_increment, table_comment
|
|
from information_schema.tables where table_schema='test' and table_name='t2';
|
|
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
unlock tables;
|
|
|
|
--echo # Switching to connection 'con46044'.
|
|
connection con46044;
|
|
--echo # Reaping CREATE TABLE ... SELECT ... .
|
|
--reap
|
|
drop table t2;
|
|
|
|
--echo #
|
|
--echo # Let us also check that queries to I_S wait for conflicting metadata
|
|
--echo # locks to go away instead of skipping table with a warning in cases
|
|
--echo # when deadlock is not possible. This is a nice thing from compatibility
|
|
--echo # and ease of use points of view.
|
|
--echo #
|
|
--echo # We check same three queries to I_S in this new situation.
|
|
|
|
--echo # Switching to connection 'con46044_2'.
|
|
connection con46044_2;
|
|
lock tables t1 read;
|
|
|
|
--echo # Switching to connection 'con46044'.
|
|
connection con46044;
|
|
--echo # Sending:
|
|
--send create table t2 select * from t1 for update;
|
|
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Waiting until CREATE TABLE ... SELECT ... is blocked.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Table lock" and info = "create table t2 select * from t1 for update";
|
|
--source include/wait_condition.inc
|
|
|
|
--echo # Let us check that SHOW FIELDS/DESCRIBE gets blocked.
|
|
--echo # Sending:
|
|
--send show fields from t2;
|
|
|
|
--echo # Switching to connection 'con46044_2'.
|
|
connection con46044_2;
|
|
--echo # Wait until SHOW FIELDS gets blocked.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "show fields from t2";
|
|
--source include/wait_condition.inc
|
|
|
|
unlock tables;
|
|
|
|
--echo # Switching to connection 'con46044'.
|
|
connection con46044;
|
|
--echo # Reaping CREATE TABLE ... SELECT ... .
|
|
--reap
|
|
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reaping SHOW FIELDS ...
|
|
--reap
|
|
drop table t2;
|
|
|
|
--echo # Switching to connection 'con46044_2'.
|
|
connection con46044_2;
|
|
lock tables t1 read;
|
|
|
|
--echo # Switching to connection 'con46044'.
|
|
connection con46044;
|
|
--echo # Sending:
|
|
--send create table t2 select * from t1 for update;
|
|
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Waiting until CREATE TABLE ... SELECT ... is blocked.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Table lock" and info = "create table t2 select * from t1 for update";
|
|
--source include/wait_condition.inc
|
|
|
|
--echo # Check that I_S query which reads only .FRMs gets blocked.
|
|
--echo # Sending:
|
|
--send select column_name from information_schema.columns where table_schema='test' and table_name='t2';
|
|
|
|
--echo # Switching to connection 'con46044_2'.
|
|
connection con46044_2;
|
|
--echo # Wait until SELECT COLUMN_NAME FROM I_S.COLUMNS gets blocked.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and
|
|
info like "select column_name from information_schema.columns%";
|
|
--source include/wait_condition.inc
|
|
|
|
unlock tables;
|
|
|
|
--echo # Switching to connection 'con46044'.
|
|
connection con46044;
|
|
--echo # Reaping CREATE TABLE ... SELECT ... .
|
|
--reap
|
|
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reaping SELECT COLUMN_NAME FROM I_S.COLUMNS
|
|
--reap
|
|
drop table t2;
|
|
|
|
--echo # Switching to connection 'con46044_2'.
|
|
connection con46044_2;
|
|
lock tables t1 read;
|
|
|
|
--echo # Switching to connection 'con46044'.
|
|
connection con46044;
|
|
--echo # Sending:
|
|
--send create table t2 select * from t1 for update;
|
|
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Waiting until CREATE TABLE ... SELECT ... is blocked.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Table lock" and info = "create table t2 select * from t1 for update";
|
|
--source include/wait_condition.inc
|
|
|
|
--echo # Finally, check that I_S query which does full-blown table open
|
|
--echo # also gets blocked.
|
|
--echo # Sending:
|
|
--send select table_name, table_type, auto_increment, table_comment from information_schema.tables where table_schema='test' and table_name='t2';
|
|
|
|
--echo # Switching to connection 'con46044_2'.
|
|
connection con46044_2;
|
|
--echo # Wait until SELECT ... FROM I_S.TABLES gets blocked.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and
|
|
info like "select table_name, table_type, auto_increment, table_comment from information_schema.tables%";
|
|
--source include/wait_condition.inc
|
|
|
|
unlock tables;
|
|
|
|
--echo # Switching to connection 'con46044'.
|
|
connection con46044;
|
|
--echo # Reaping CREATE TABLE ... SELECT ... .
|
|
--reap
|
|
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Reaping SELECT ... FROM I_S.TABLES
|
|
--reap
|
|
drop table t2;
|
|
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Clean-up.
|
|
disconnect con46044;
|
|
disconnect con46044_2;
|
|
drop table t1;
|
|
|
|
|
|
--echo #
|
|
--echo # Test for bug #46273 "MySQL 5.4.4 new MDL: Bug#989 is not fully fixed
|
|
--echo # in case of ALTER".
|
|
--echo #
|
|
--disable_warnings
|
|
drop table if exists t1;
|
|
--enable_warnings
|
|
set debug_sync= 'RESET';
|
|
connect (con46273,localhost,root,,test,,);
|
|
connection default;
|
|
create table t1 (c1 int primary key, c2 int, c3 int);
|
|
insert into t1 values (1,1,0),(2,2,0),(3,3,0),(4,4,0),(5,5,0);
|
|
|
|
begin;
|
|
select * from t1 where c2 = 3;
|
|
|
|
--echo #
|
|
--echo # Switching to connection 'con46273'.
|
|
connection con46273;
|
|
set debug_sync='after_lock_tables_takes_lock SIGNAL alter_table_locked WAIT_FOR alter_go';
|
|
--send alter table t1 add column e int, rename to t2;
|
|
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
set debug_sync='now WAIT_FOR alter_table_locked';
|
|
set debug_sync='before_open_table_wait_refresh SIGNAL alter_go';
|
|
--echo # The below statement should get ER_LOCK_DEADLOCK error
|
|
--echo # (i.e. it should not allow ALTER to proceed, and then
|
|
--echo # fail due to 't1' changing its name to 't2').
|
|
--error ER_LOCK_DEADLOCK
|
|
update t1 set c3=c3+1 where c2 = 3;
|
|
|
|
--echo #
|
|
--echo # Let us check that failure of the above statement has not released
|
|
--echo # metadata lock on table 't1', i.e. that ALTER TABLE is still blocked.
|
|
let $wait_condition=
|
|
select count(*) = 1 from information_schema.processlist
|
|
where state = "Waiting for table" and info = "alter table t1 add column e int, rename to t2";
|
|
--source include/wait_condition.inc
|
|
|
|
--echo # Unblock ALTER TABLE by commiting transaction and thus releasing
|
|
--echo # metadata lock on 't1'.
|
|
commit;
|
|
|
|
--echo #
|
|
--echo # Switching to connection 'con46273'.
|
|
connection con46273;
|
|
--echo # Reap ALTER TABLE.
|
|
--reap
|
|
|
|
--echo #
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
disconnect con46273;
|
|
--echo # Clean-up.
|
|
set debug_sync= 'RESET';
|
|
drop table t2;
|
|
|
|
|
|
--echo #
|
|
--echo # Test for bug #46673 "Deadlock between FLUSH TABLES WITH READ LOCK
|
|
--echo # and DML".
|
|
--echo #
|
|
--disable_warnings
|
|
drop tables if exists t1;
|
|
--enable_warnings
|
|
connect (con46673, localhost, root,,);
|
|
connection default;
|
|
create table t1 (i int);
|
|
|
|
--echo # Switching to connection 'con46673'.
|
|
connection con46673;
|
|
begin;
|
|
insert into t1 values (1);
|
|
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Statement below should not get blocked. And if after some
|
|
--echo # changes to code it is there should not be a deadlock between
|
|
--echo # it and transaction from connection 'con46673'.
|
|
flush tables with read lock;
|
|
unlock tables;
|
|
|
|
--echo # Switching to connection 'con46673'.
|
|
connection con46673;
|
|
delete from t1 where i = 1;
|
|
commit;
|
|
|
|
--echo # Switching to connection 'default'.
|
|
connection default;
|
|
--echo # Clean-up
|
|
disconnect con46673;
|
|
drop table t1;
|
|
|
|
|
|
--echo #
|
|
--echo # Bug#48210 FLUSH TABLES WITH READ LOCK deadlocks
|
|
--echo # against concurrent CREATE PROCEDURE
|
|
--echo #
|
|
|
|
connect (con2, localhost, root);
|
|
|
|
--echo # Test 1: CREATE PROCEDURE
|
|
|
|
--echo # Connection 1
|
|
connection default;
|
|
--echo # Start CREATE PROCEDURE and open mysql.proc
|
|
SET DEBUG_SYNC= 'after_open_table_mdl_shared SIGNAL table_opened WAIT_FOR grlwait';
|
|
--send CREATE PROCEDURE p1() SELECT 1
|
|
|
|
--echo # Connection 2
|
|
connection con2;
|
|
SET DEBUG_SYNC= 'now WAIT_FOR table_opened';
|
|
--echo # Check that FLUSH must wait to get the GRL
|
|
--echo # and let CREATE PROCEDURE continue
|
|
SET DEBUG_SYNC= 'wait_lock_global_read_lock SIGNAL grlwait';
|
|
--send FLUSH TABLES WITH READ LOCK
|
|
|
|
--echo # Connection 1
|
|
connection default;
|
|
--reap
|
|
|
|
--echo # Connection 2
|
|
connection con2;
|
|
--reap
|
|
UNLOCK TABLES;
|
|
|
|
--echo # Connection 1
|
|
connection default;
|
|
SET DEBUG_SYNC= 'RESET';
|
|
|
|
--echo # Test 2: DROP PROCEDURE
|
|
|
|
connection default;
|
|
--echo # Start DROP PROCEDURE and open tables
|
|
SET DEBUG_SYNC= 'after_open_table_mdl_shared SIGNAL table_opened WAIT_FOR grlwait';
|
|
--send DROP PROCEDURE p1
|
|
|
|
--echo # Connection 2
|
|
connection con2;
|
|
SET DEBUG_SYNC= 'now WAIT_FOR table_opened';
|
|
--echo # Check that FLUSH must wait to get the GRL
|
|
--echo # and let DROP PROCEDURE continue
|
|
SET DEBUG_SYNC= 'wait_lock_global_read_lock SIGNAL grlwait';
|
|
--send FLUSH TABLES WITH READ LOCK
|
|
|
|
--echo # Connection 1
|
|
connection default;
|
|
--reap
|
|
|
|
--echo # Connection 2
|
|
connection con2;
|
|
--reap
|
|
UNLOCK TABLES;
|
|
|
|
--echo # Connection 1
|
|
connection default;
|
|
SET DEBUG_SYNC= 'RESET';
|
|
|
|
disconnect con2;
|
|
|
|
|
|
# Check that all connections opened by test cases in this file are really
|
|
# gone so execution of other tests won't be affected by their presence.
|
|
--source include/wait_until_count_sessions.inc
|