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- 17 Nov, 2010 5 commits
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Jon Olav Hauglid authored
No conflicts
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Tor Didriksen authored
mysql-test/r/func_math.result: Add test for Bug #58137 mysql-test/t/func_math.test: Add test for Bug #58137 sql/field.cc: Skip calling my_gcvt() if we are trying to insert a double into a char(0) column.
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Jon Olav Hauglid authored
breaks SBR The problem was that DROP DATABASE ignored any metadata locks on stored functions and procedures held by other connections. This made it possible for DROP DATABASE to drop functions/procedures that were in use by other connections and therefore break statement based replication. (DROP DATABASE could appear in the binlog before a statement using a dropped function/procedure.) This problem was an issue left unresolved by the patch for Bug#30977 where metadata locks for stored functions/procedures were introduced. This patch fixes the problem by making sure DROP DATABASE takes exclusive metadata locks on all stored functions/procedures to be dropped. Test case added to sp-lock.test.
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Davi Arnaut authored
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Davi Arnaut authored
Use __builtin_stpcpy only if the system supports stpcpy. This is necessary as in some cases a call to stpcpy will be emitted if the built-in can not optimized. include/m_string.h: The expansion of stpcpy (in glibc) causes warnings if the return value of strmov is not being used. Since stpcpy is a GNU extension and the expansion ends up using a built-in provided by GCC, use the compiler provided built-in directly when possible. Nonetheless, the C library must have stpcpy as a call be emitted if the built-in can not optimized.
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- 16 Nov, 2010 10 commits
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Mats Kindahl authored
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Mats Kindahl authored
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Mats Kindahl authored
Memory was allocated for storing path names inside fn_expand(), which were not free:ed anywhere. This patch fixes the problem by storing the path names in statically allocated buffers instead, which is automatically free:ed when the server exits.
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Jon Olav Hauglid authored
breaks SBR This pre-requisite patch refactors the code for dropping tables, used by DROP TABLE and DROP DATABASE. The patch moves the code for acquiring metadata locks out of mysql_rm_table_part2() and makes it the responsibility of the caller. This in preparation of changing the DROP DATABASE implementation to acquire all metadata locks before any changes are made. mysql_rm_table_part2() is renamed mysql_rm_table_no_locks() to reflect the change.
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Davi Arnaut authored
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Jon Olav Hauglid authored
No conflicts
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Marc Alff authored
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Marc Alff authored
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Mattias Jonsson authored
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Mattias Jonsson authored
Including adding test in 5.5 requiring --big-test flag from mysql-test-run.pl and also disabled tests that fails. mysql-test/collections/default.weekly: Added all tests requiring --big-test in alphabetical order mysql-test/r/information_schema-big.result: Updated result mysql-test/r/variables-big.result: updated results mysql-test/t/disabled.def: Added tests that fails (has not been run regularly since they need --big-test)
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- 15 Nov, 2010 7 commits
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Mattias Jonsson authored
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Mattias Jonsson authored
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Mattias Jonsson authored
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Mattias Jonsson authored
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Jorgen Loland authored
during EXPLAIN Before the patch, send_eof() of some subclasses of select_result (e.g., select_send::send_eof()) could handle being called after an error had occured while others could not. The methods that were not well-behaved would trigger an ASSERT on debug builds. Release builds were not affected. Consider the following query as an example for how the ASSERT could be triggered: A user without execute privilege on f() does SELECT MAX(key1) INTO @dummy FROM t1 WHERE f() < 1; resulting in "ERROR 42000: execute command denied to user..." The server would end the query by calling send_eof(). The fact that the error had occured would make the ASSERT trigger. select_dumpvar::send_eof() was the offending method in the bug report, but the problem also applied to other subclasses of select_result. This patch uniforms send_eof() of all subclasses of select_result to handle being called after an error has occured. mysql-test/r/not_embedded_server.result: Added test for BUG#54812 mysql-test/t/not_embedded_server.test: Added test for BUG#54812 sql/sql_class.cc: send_eof() of all subclasses of select_result can now handle being called after an error has occured. sql/sql_insert.cc: send_eof() of all subclasses of select_result can now handle being called after an error has occured. Also fix call to abort() in select_create::send_eof(), which was supposed to abort the result set, not terminate the server. This call to abort() should have been changed when the function was renamed from abort_result_set() but was forgotten. New test case added by BUG#54812 covered this line and terminated server. sql/sql_prepare.cc: send_eof() of all subclasses of select_result can now handle being called after an error has occured. sql/sql_update.cc: send_eof() of all subclasses of select_result can now handle being called after an error has occured.
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Mattias Jonsson authored
The test result differs on windows, since it writes out 'localhost:<port>' instead of only 'localhost', since it uses tcp/ip instead of unix sockets on windows. Fixed by replacing that column. Also requires --big-test from some long running tests and added a weekly run of all test requiring --big-test. mysql-test/collections/default.weekly: Added a run of big-test (already exists in 5.5). mysql-test/r/variables-big.result: Updated results mysql-test/suite/parts/t/part_supported_sql_func_innodb.test: requiring --big-test since the test takes long time mysql-test/suite/parts/t/partition_alter1_1_2_innodb.test: requiring --big-test since the test takes long time mysql-test/suite/parts/t/partition_alter1_2_innodb.test: requiring --big-test since the test takes long time mysql-test/suite/parts/t/partition_alter4_innodb.test: requiring --big-test since the test takes long time mysql-test/t/disabled.def: Disabled two tests since they fail and was already reported as bugs (but was never run since they requires --big-test flag). mysql-test/t/variables-big.test: Replacing column 3 in process list since it is not the same on windows as in unix.
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Jon Olav Hauglid authored
breaks SBR This pre-requisite patch removes obsolete and dead code used to remove raid subdirectories and files during DROP DATABASE. Other parts of the raid code have already been removed in WL#5498 and the support for MyISAM raid tables was removed in 5.0.
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- 13 Nov, 2010 4 commits
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Vladislav Vaintroub authored
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Vladislav Vaintroub authored
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Vladislav Vaintroub authored
Problem: with "make package" , many small packages are generated, one per CMake COMPONENT, instead of expected single package. This is due to the new (in cmake 2.8.3) component-based install for archive( e.g ZIP,TGZ ) CPack generators. See http://public.kitware.com/Bug/view.php?id=11452 for discussion. Fix: use CPACK_MONOLITHIC_INSTALL=1 to enforce single package. Reset this variable temporarily to 0 for MSI creation (MSI needs COMPONENTs)
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Alexander Nozdrin authored
structure buffer). This is a follow-up for WL#4435. The bug actually existed not only MYSQL_TYPE_DATETIME type. The problem was that Item_param::set_value() was written in an assumption that it's working with expressions, i.e. with basic data types. There are two different quick fixes here: a) Change Item_param::make_field() -- remove setting of Send_field::length, Send_field::charsetnr, Send_field::flags and Send_field::type. That would lead to marshalling all data using basic types to the client (MYSQL_TYPE_LONGLONG, MYSQL_TYPE_DOUBLE, MYSQL_TYPE_STRING and MYSQL_TYPE_NEWDECIMAL). In particular, that means, DATETIME would be sent as MYSQL_TYPE_STRING, TINYINT -- as MYSQL_TYPE_LONGLONG, etc. That could be Ok for the client, because the client library does reverse conversion automatically (the client program would see DATETIME as MYSQL_TIME object). However, there is a problem with metadata -- the metadata would be wrong (misleading): it would say that DATETIME is marshaled as MYSQL_TYPE_DATETIME, not as MYSQL_TYPE_STRING. b) Set Item_param::param_type properly to actual underlying field type. That would lead to double conversion inside the server: for example, MYSQL_TIME-object would be converted into STRING-object (in Item_param::set_value()), and then converted back to MYSQL_TIME-object (in Item_param::send()). The data however would be marshalled more properly, and also metadata would be correct. This patch implements b). There is also a possibility to avoid double conversion either by clonning the data field, or by storing a reference to it and using it on Item::send() time. That requires more work and might be done later.
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- 12 Nov, 2010 9 commits
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Joerg Bruehe authored
MySQL-shared RPM no longer provides mysql-shared The spec file is changed to explicitly "provide" "mysql-shared" by the "shared" sub-RPM.
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Konstantin Osipov authored
by the patch for Bug#57058. sql/sql_error.cc: Delete assignment of a removed class member.
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Dmitry Lenev authored
HANDLER and FLUSH TABLES WITH READ LOCK" and bug #54673 "It takes too long to get readlock for 'FLUSH TABLES WITH READ LOCK'". Disable execution of flush_read_lock.test on embedded server. This test uses too many statements which are not supported by embedded server.
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Konstantin Osipov authored
network when a query was slow. When a query is slow, sent a special flag to the client indicating this fact. Add a test case. Implement review comments. include/mysql_com.h: Clear SERVER_QUERY_WAS_SLOW at end of each statement. Since this patch removes the technique when thd->server_status is modified briefly only to execute my_eof(), reset more server status bit that may remain in the status from execution of the previous statement. sql/protocol.cc: Always use thd->server_status to in net_* functions to send the latest status to the client. sql/sp_head.cc: Calculate if a query was slow before sending EOF packet. sql/sql_cursor.cc: Remove juggling with thd->server_status. The extra status bits are reset at start of the next statement. sql/sql_db.cc: Remove juggling with thd->server_status. The extra status bits are reset at start of the next statement. sql/sql_error.cc: Remove m_server_status member, it's not really part of the Diagnostics_area. sql/sql_error.h: Remove server_status member, it's not part of the Diagnostics_area. The associated hack is removed as well. sql/sql_parse.cc: Do not calculate if a query was slow twice. Use a status flag in thd->server_status. tests/mysql_client_test.c: Add a test case for Bug#57058. Check that the status is present at the client, when sent.
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Vladislav Vaintroub authored
Backport version info handling (Windows-specific) from next-mr. Instead of adding ".res" object as linker flag, add resource file (.rc) file to the source list. This is more obvious and less error prone method.
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Jon Olav Hauglid authored
Text conflict in mysql-test/suite/perfschema/r/dml_setup_instruments.result Text conflict in mysql-test/suite/perfschema/r/global_read_lock.result Text conflict in mysql-test/suite/perfschema/r/server_init.result Text conflict in mysql-test/suite/perfschema/t/global_read_lock.test Text conflict in mysql-test/suite/perfschema/t/server_init.test
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Marc Alff authored
Before this fix, file io for the binary log file was not accounted properly, and showed no io at all. This bug was due to the following issues: 1) file io for the binlog was instrumented: - sometime as "wait/io/file/sql/binlog" - sometime as "wait/io/file/sql/MYSQL_LOG" leading to inconsistent event_names. 2) the binlog file itself was using an IO_CACHE, but the IO_CACHE implementation in mysys/mf_iocache.c was not instrumented to make performance schema calls to record file io. 3) The "wait/io/file/sql/MYSQL_LOG" instrumentation was used for several log files, such as: - the binary log - the slow log - the query log which caused file io in these different log files to be accounted against the same instrument. The instrumentation needs to have a finer grain and report io in different event_names, because each file really serves a different purpose. With this fix: - the IO_CACHE implementation is now instrumented - the "wait/io/file/sql/MYSQL_LOG" instrument has been removed - binlog io is now always instrumented with "wait/io/file/sql/binlog" - the slow log is instrumented with a new name, "wait/io/file/sql/slow_log" - the query log is instrumented with a new name, "wait/io/file/sql/query_log"
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Vladislav Vaintroub authored
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Vladislav Vaintroub authored
--with-comment correctly Properly convert --with-comment do not uppercase it, quote as it might contain spaces.
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- 11 Nov, 2010 5 commits
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Dmitry Lenev authored
bug #57006 "Deadlock between HANDLER and FLUSH TABLES WITH READ LOCK" and bug #54673 "It takes too long to get readlock for 'FLUSH TABLES WITH READ LOCK'". The first bug manifested itself as a deadlock which occurred when a connection, which had some table open through HANDLER statement, tried to update some data through DML statement while another connection tried to execute FLUSH TABLES WITH READ LOCK concurrently. What happened was that FTWRL in the second connection managed to perform first step of GRL acquisition and thus blocked all upcoming DML. After that it started to wait for table open through HANDLER statement to be flushed. When the first connection tried to execute DML it has started to wait for GRL/the second connection creating deadlock. The second bug manifested itself as starvation of FLUSH TABLES WITH READ LOCK statements in cases when there was a constant stream of concurrent DML statements (in two or more connections). This has happened because requests for protection against GRL which were acquired by DML statements were ignoring presence of pending GRL and thus the latter was starved. This patch solves both these problems by re-implementing GRL using metadata locks. Similar to the old implementation acquisition of GRL in new implementation is two-step. During the first step we block all concurrent DML and DDL statements by acquiring global S metadata lock (each DML and DDL statement acquires global IX lock for its duration). During the second step we block commits by acquiring global S lock in COMMIT namespace (commit code acquires global IX lock in this namespace). Note that unlike in old implementation acquisition of protection against GRL in DML and DDL is semi-automatic. We assume that any statement which should be blocked by GRL will either open and acquires write-lock on tables or acquires metadata locks on objects it is going to modify. For any such statement global IX metadata lock is automatically acquired for its duration. The first problem is solved because waits for GRL become visible to deadlock detector in metadata locking subsystem and thus deadlocks like one in the first bug become impossible. The second problem is solved because global S locks which are used for GRL implementation are given preference over IX locks which are acquired by concurrent DML (and we can switch to fair scheduling in future if needed). Important change: FTWRL/GRL no longer blocks DML and DDL on temporary tables. Before this patch behavior was not consistent in this respect: in some cases DML/DDL statements on temporary tables were blocked while in others they were not. Since the main use cases for FTWRL are various forms of backups and temporary tables are not preserved during backups we have opted for consistently allowing DML/DDL on temporary tables during FTWRL/GRL. Important change: This patch changes thread state names which are used when DML/DDL of FTWRL is waiting for global read lock. It is now either "Waiting for global read lock" or "Waiting for commit lock" depending on the stage on which FTWRL is. Incompatible change: To solve deadlock in events code which was exposed by this patch we have to replace LOCK_event_metadata mutex with metadata locks on events. As result we have to prohibit DDL on events under LOCK TABLES. This patch also adds extensive test coverage for interaction of DML/DDL and FTWRL. Performance of new and old global read lock implementations in sysbench tests were compared. There were no significant difference between new and old implementations. mysql-test/include/check_ftwrl_compatible.inc: Added helper script which allows to check that a statement is compatible with FLUSH TABLES WITH READ LOCK. mysql-test/include/check_ftwrl_incompatible.inc: Added helper script which allows to check that a statement is incompatible with FLUSH TABLES WITH READ LOCK. mysql-test/include/handler.inc: Adjusted test case to the fact that now DROP TABLE closes open HANDLERs for the table to be dropped before checking if there active FTWRL in this connection. mysql-test/include/wait_show_condition.inc: Fixed small error in the timeout message. The correct name of variable used as parameter for this script is "$condition" and not "$wait_condition". mysql-test/r/delayed.result: Added test coverage for scenario which triggered assert in metadata locking subsystem. mysql-test/r/events_2.result: Updated test results after prohibiting event DDL operations under LOCK TABLES. mysql-test/r/flush.result: Added test coverage for bug #57006 "Deadlock between HANDLER and FLUSH TABLES WITH READ LOCK". mysql-test/r/flush_read_lock.result: Added test coverage for various aspects of FLUSH TABLES WITH READ LOCK functionality. mysql-test/r/flush_read_lock_kill.result: Adjusted test case after replacing custom global read lock implementation with one based on metadata locks. Use new debug_sync point. Do not disable concurrent inserts as now InnoDB we always use InnoDB table. mysql-test/r/handler_innodb.result: Adjusted test case to the fact that now DROP TABLE closes open HANDLERs for the table to be dropped before checking if there active FTWRL in this connection. mysql-test/r/handler_myisam.result: Adjusted test case to the fact that now DROP TABLE closes open HANDLERs for the table to be dropped before checking if there active FTWRL in this connection. mysql-test/r/mdl_sync.result: Adjusted test case after replacing custom global read lock implementation with one based on metadata locks. Replaced usage of GRL-specific debug_sync's with appropriate sync points in MDL subsystem. mysql-test/suite/perfschema/r/dml_setup_instruments.result: Updated test results after removing global COND_global_read_lock condition variable. mysql-test/suite/perfschema/r/func_file_io.result: Ensure that this test doesn't affect subsequent tests. At the end of its execution enable back P_S instrumentation which this test disables at some point. mysql-test/suite/perfschema/r/func_mutex.result: Ensure that this test doesn't affect subsequent tests. At the end of its execution enable back P_S instrumentation which this test disables at some point. mysql-test/suite/perfschema/r/global_read_lock.result: Adjusted test case to take into account that new GRL implementation is based on MDL. mysql-test/suite/perfschema/r/server_init.result: Adjusted test case after replacing custom global read lock implementation with one based on MDL and replacing LOCK_event_metadata mutex with metadata lock. mysql-test/suite/perfschema/t/func_file_io.test: Ensure that this test doesn't affect subsequent tests. At the end of its execution enable back P_S instrumentation which this test disables at some point. mysql-test/suite/perfschema/t/func_mutex.test: Ensure that this test doesn't affect subsequent tests. At the end of its execution enable back P_S instrumentation which this test disables at some point. mysql-test/suite/perfschema/t/global_read_lock.test: Adjusted test case to take into account that new GRL implementation is based on MDL. mysql-test/suite/perfschema/t/server_init.test: Adjusted test case after replacing custom global read lock implementation with one based on MDL and replacing LOCK_event_metadata mutex with metadata lock. mysql-test/suite/rpl/r/rpl_tmp_table_and_DDL.result: Updated test results after prohibiting event DDL under LOCK TABLES. mysql-test/t/delayed.test: Added test coverage for scenario which triggered assert in metadata locking subsystem. mysql-test/t/events_2.test: Updated test case after prohibiting event DDL operations under LOCK TABLES. mysql-test/t/flush.test: Added test coverage for bug #57006 "Deadlock between HANDLER and FLUSH TABLES WITH READ LOCK". mysql-test/t/flush_block_commit.test: Adjusted test case after changing thread state name which is used when COMMIT waits for FLUSH TABLES WITH READ LOCK from "Waiting for release of readlock" to "Waiting for commit lock". mysql-test/t/flush_block_commit_notembedded.test: Adjusted test case after changing thread state name which is used when DML waits for FLUSH TABLES WITH READ LOCK. Now we use "Waiting for global read lock" in this case. mysql-test/t/flush_read_lock.test: Added test coverage for various aspects of FLUSH TABLES WITH READ LOCK functionality. mysql-test/t/flush_read_lock_kill-master.opt: We no longer need to use make_global_read_lock_block_commit_loop debug tag in this test. Instead we rely on an appropriate debug_sync point in MDL code. mysql-test/t/flush_read_lock_kill.test: Adjusted test case after replacing custom global read lock implementation with one based on metadata locks. Use new debug_sync point. Do not disable concurrent inserts as now InnoDB we always use InnoDB table. mysql-test/t/lock_multi.test: Adjusted test case after changing thread state names which are used when DML or DDL waits for FLUSH TABLES WITH READ LOCK to "Waiting for global read lock". mysql-test/t/mdl_sync.test: Adjusted test case after replacing custom global read lock implementation with one based on metadata locks. Replaced usage of GRL-specific debug_sync's with appropriate sync points in MDL subsystem. Updated thread state names which are used when DDL waits for FTWRL. mysql-test/t/trigger_notembedded.test: Adjusted test case after changing thread state names which are used when DML or DDL waits for FLUSH TABLES WITH READ LOCK to "Waiting for global read lock". sql/event_data_objects.cc: Removed Event_queue_element::status/last_executed_changed members and Event_queue_element::update_timing_fields() method. We no longer use this class for updating mysql.events once event is chosen for execution. Accesses to instances of this class in scheduler thread require protection by Event_queue::LOCK_event_queue mutex and we try to avoid updating table while holding this lock. sql/event_data_objects.h: Removed Event_queue_element::status/last_executed_changed members and Event_queue_element::update_timing_fields() method. We no longer use this class for updating mysql.events once event is chosen for execution. Accesses to instances of this class in scheduler thread require protection by Event_queue::LOCK_event_queue mutex and we try to avoid updating table while holding this lock. sql/event_db_repository.cc: - Changed Event_db_repository methods to not release all metadata locks once they are done updating mysql.events table. This allows to keep metadata lock protecting against GRL and lock protecting particular event around until corresponding DDL statement is written to the binary log. - Removed logic for conditional update of "status" and "last_executed" fields from update_timing_fields_for_event() method. In the only case when this method is called now "last_executed" is always modified and tracking change of "status" is too much hassle. sql/event_db_repository.h: Removed logic for conditional update of "status" and "last_executed" fields from Event_db_repository:: update_timing_fields_for_event() method. In the only case when this method is called now "last_executed" is always modified and tracking change of "status" field is too much hassle. sql/event_queue.cc: Changed event scheduler code not to update mysql.events table while holding Event_queue::LOCK_event_queue mutex. Doing so led to a deadlock with a new GRL implementation. This deadlock didn't occur with old implementation due to fact that code acquiring protection against GRL ignored pending GRL requests (which lead to GRL starvation). One of goals of new implementation is to disallow GRL starvation and so we have to solve problem with this deadlock in a different way. sql/events.cc: Changed methods of Events class to acquire protection against GRL while perfoming DDL statement and keep it until statement is written to the binary log. Unfortunately this step together with new GRL implementation exposed deadlock involving Events::LOCK_event_metadata and GRL. To solve it Events::LOCK_event_metadata mutex was replaced with a metadata lock on event. As a side-effect events DDL has to be prohibited under LOCK TABLES even in cases when mysql.events table was explicitly locked for write. sql/events.h: Replaced Events::LOCK_event_metadata mutex with a metadata lock on event. sql/ha_ndbcluster.cc: Updated code after replacing custom global read lock implementation with one based on MDL. Since MDL subsystem should now be able to detect deadlocks involving metadata locks and GRL there is no need for special handling of active GRL. sql/handler.cc: Replaced custom implementation of global read lock with one based on metadata locks. Consequently when doing commit instead of calling method of Global_read_lock class to acquire protection against GRL we simply acquire IX in COMMIT namespace. sql/lock.cc: Replaced custom implementation of global read lock with one based on metadata locks. This step allows to expose wait for GRL to deadlock detector of MDL subsystem and thus succesfully resolve deadlocks similar to one behind bug #57006 "Deadlock between HANDLER and FLUSH TABLES WITH READ LOCK". It also solves problem with GRL starvation described in bug #54673 "It takes too long to get readlock for 'FLUSH TABLES WITH READ LOCK'" since metadata locks used by GRL give preference to FTWRL statement instead of DML statements (if needed in future this can be changed to fair scheduling). Similar to old implementation of acquisition of GRL is two-step. During the first step we block all concurrent DML and DDL statements by acquiring global S metadata lock (each DML and DDL statement acquires global IX lock for its duration). During the second step we block commits by acquiring global S lock in COMMIT namespace (commit code acquires global IX lock in this namespace). Note that unlike in old implementation acquisition of protection against GRL in DML and DDL is semi-automatic. We assume that any statement which should be blocked by GRL will either open and acquires write-lock on tables or acquires metadata locks on objects it is going to modify. For any such statement global IX metadata lock is automatically acquired for its duration. To support this change: - Global_read_lock::lock/unlock_global_read_lock and make_global_read_lock_block_commit methods were changed accordingly. - Global_read_lock::wait_if_global_read_lock() and start_waiting_global_read_lock() methods were dropped. It is now responsibility of code acquiring metadata locks opening tables to acquire protection against GRL by explicitly taking global IX lock with statement duration. - Global variables, mutex and condition variable used by old implementation was removed. - lock_routine_name() was changed to use statement duration for its global IX lock. It was also renamed to lock_object_name() as it now also used to take metadata locks on events. - Global_read_lock::set_explicit_lock_duration() was added which allows not to release locks used for GRL when leaving prelocked mode. sql/lock.h: - Renamed lock_routine_name() to lock_object_name() and changed its signature to allow its usage for events. - Removed broadcast_refresh() function. It is no longer needed with new GRL implementation. sql/log_event.cc: Release metadata locks with statement duration at the end of processing legacy event for LOAD DATA. This ensures that replication thread processing such event properly releases its protection against global read lock. sql/mdl.cc: Changed MDL subsystem to support new MDL-based implementation of global read lock. Added COMMIT and EVENTS namespaces for metadata locks. Changed thread state name for GLOBAL namespace to "Waiting for global read lock". Optimized MDL_map::find_or_insert() method to avoid taking m_mutex mutex when looking up MDL_lock objects for GLOBAL or COMMIT namespaces. We keep pre-created MDL_lock objects for these namespaces around and simply return pointers to these global objects when needed. Changed MDL_lock/MDL_scoped_lock to properly handle notification of insert delayed handler threads when FTWRL takes global S lock. Introduced concept of lock duration. In addition to locks with transaction duration which work in the way which is similar to how locks worked before (i.e. they are released at the end of transaction), locks with statement and explicit duration were introduced. Locks with statement duration are automatically released at the end of statement. Locks with explicit duration require explicit release and obsolete concept of transactional sentinel. * Changed MDL_request and MDL_ticket classes to support notion of duration. * Changed MDL_context to keep locks with different duration in different lists. Changed code handling ticket list to take this into account. * Changed methods responsible for releasing locks to take into account duration of tickets. Particularly public MDL_context::release_lock() method now only can release tickets with explicit duration (there is still internal method which allows to specify duration). To release locks with statement or transaction duration one have to use release_statement/transactional_locks() methods. * Concept of savepoint for MDL subsystem now has to take into account locks with statement duration. Consequently MDL_savepoint class was introduced and methods working with savepoints were updated accordingly. * Added methods which allow to set duration for one or all locks in the context. sql/mdl.h: Changed MDL subsystem to support new MDL-based implementation of global read lock. Added COMMIT and EVENTS namespaces for metadata locks. Introduced concept of lock duration. In addition to locks with transaction duration which work in the way which is similar to how locks worked before (i.e. they are released at the end of transaction), locks with statement and explicit duration were introduced. Locks with statement duration are automatically released at the end of statement. Locks with explicit duration require explicit release and obsolete concept of transactional sentinel. * Changed MDL_request and MDL_ticket classes to support notion of duration. * Changed MDL_context to keep locks with different duration in different lists. Changed code handling ticket list to take this into account. * Changed methods responsible for releasing locks to take into account duration of tickets. Particularly public MDL_context::release_lock() method now only can release tickets with explicit duration (there is still internal method which allows to specify duration). To release locks with statement or transaction duration one have to use release_statement/transactional_locks() methods. * Concept of savepoint for MDL subsystem now has to take into account locks with statement duration. Consequently MDL_savepoint class was introduced and methods working with savepoints were updated accordingly. * Added methods which allow to set duration for one or all locks in the context. sql/mysqld.cc: Removed global mutex and condition variables which were used by old implementation of GRL. Also we no longer need to initialize Events::LOCK_event_metadata mutex as it was replaced with metadata locks on events. sql/mysqld.h: Removed global variable, mutex and condition variables which were used by old implementation of GRL. sql/rpl_rli.cc: When slave thread closes tables which were open for handling of RBR events ensure that it releases global IX lock which was acquired as protection against GRL. sql/sp.cc: Adjusted code to the new signature of lock_object/routine_name(), to the fact that one now needs specify duration of lock when initializing MDL_request and to the fact that savepoints for MDL subsystem are now represented by MDL_savepoint class. sql/sp_head.cc: Ensure that statements in stored procedures release statement metadata locks and thus release their protectiong against GRL in proper moment in time. Adjusted code to the fact that one now needs specify duration of lock when initializing MDL_request. sql/sql_admin.cc: Adjusted code to the fact that one now needs specify duration of lock when initializing MDL_request. sql/sql_base.cc: - Implemented support for new approach to acquiring protection against global read lock. We no longer acquire such protection explicitly on the basis of statement flags. Instead we always rely on code which is responsible for acquiring metadata locks on object to be changed acquiring this protection. This is achieved by acquiring global IX metadata lock with statement duration. Code doing this also responsible for checking that current connection has no active GRL by calling an Global_read_lock::can_acquire_protection() method. Changed code in open_table() and lock_table_names() accordingly. Note that as result of this change DDL and DML on temporary tables is always compatible with GRL (before it was incompatible in some cases and compatible in other cases). - To speed-up code acquiring protection against GRL introduced m_has_protection_against_grl member in Open_table_context class. It indicates that protection was already acquired sometime during open_tables() execution and new attempts can be skipped. - Thanks to new GRL implementation calls to broadcast_refresh() became unnecessary and were removed. - Adjusted code to the fact that one now needs specify duration of lock when initializing MDL_request and to the fact that savepoints for MDL subsystem are now represented by MDL_savepoint class. sql/sql_base.h: Adjusted code to the fact that savepoints for MDL subsystem are now represented by MDL_savepoint class. Also introduced Open_table_context::m_has_protection_against_grl member which allows to avoid acquiring protection against GRL while opening tables if such protection was already acquired. sql/sql_class.cc: Changed THD::leave_locked_tables_mode() after transactional sentinel for metadata locks was obsoleted by introduction of locks with explicit duration. sql/sql_class.h: - Adjusted code to the fact that savepoints for MDL subsystem are now represented by MDL_savepoint class. - Changed Global_read_lock class according to changes in global read lock implementation: * wait_if_global_read_lock and start_waiting_global_read_lock are now gone. Instead code needing protection against GRL has to acquire global IX metadata lock with statement duration itself. To help it new can_acquire_protection() was introduced. Also as result of the above change m_protection_count member is gone too. * Added m_mdl_blocks_commits_lock member to store metadata lock blocking commits. * Adjusted code to the fact that concept of transactional sentinel was obsoleted by concept of lock duration. - Removed CF_PROTECT_AGAINST_GRL flag as it is no longer necessary. New GRL implementation acquires protection against global read lock automagically when statement acquires metadata locks on tables or other objects it is going to change. sql/sql_db.cc: Adjusted code to the fact that one now needs specify duration of lock when initializing MDL_request. sql/sql_handler.cc: Removed call to broadcast_refresh() function. It is no longer needed with new GRL implementation. Adjusted code after introducing duration concept for metadata locks. Particularly to the fact transactional sentinel was replaced with explicit duration. sql/sql_handler.h: Renamed mysql_ha_move_tickets_after_trans_sentinel() to mysql_ha_set_explicit_lock_duration() after transactional sentinel was obsoleted by locks with explicit duration. sql/sql_insert.cc: Adjusted code handling delaying inserts after switching to new GRL implementation. Now connection thread initiating delayed insert has to acquire global IX lock in addition to metadata lock on table being inserted into. This IX lock protects against GRL and similarly to SW lock on table being inserted into has to be passed to handler thread in order to avoid deadlocks. sql/sql_lex.cc: LEX::protect_against_global_read_lock member is no longer necessary since protection against GRL is automatically taken by code acquiring metadata locks/opening tables. sql/sql_lex.h: LEX::protect_against_global_read_lock member is no longer necessary since protection against GRL is automatically taken by code acquiring metadata locks/opening tables. sql/sql_parse.cc: - Implemented support for new approach to acquiring protection against global read lock. We no longer acquire such protection explicitly on the basis of statement flags. Instead we always rely on code which is responsible for acquiring metadata locks on object to be changed acquiring this protection. This is achieved by acquiring global IX metadata lock with statement duration. This lock is automatically released at the end of statement execution. - Changed implementation of CREATE/DROP PROCEDURE/FUNCTION not to release metadata locks and thus protection against of GRL in the middle of statement execution. - Adjusted code to the fact that one now needs specify duration of lock when initializing MDL_request and to the fact that savepoints for MDL subsystem are now represented by MDL_savepoint class. sql/sql_prepare.cc: Adjusted code to the to the fact that savepoints for MDL subsystem are now represented by MDL_savepoint class. sql/sql_rename.cc: With new GRL implementation there is no need to explicitly acquire protection against GRL before renaming tables. This happens automatically in code which acquires metadata locks on tables being renamed. sql/sql_show.cc: Adjusted code to the fact that one now needs specify duration of lock when initializing MDL_request and to the fact that savepoints for MDL subsystem are now represented by MDL_savepoint class. sql/sql_table.cc: - With new GRL implementation there is no need to explicitly acquire protection against GRL before dropping tables. This happens automatically in code which acquires metadata locks on tables being dropped. - Changed mysql_alter_table() not to release lock on new table name explicitly and to rely on automatic release of locks at the end of statement instead. This was necessary since now MDL_context::release_lock() is supported only for locks for explicit duration. sql/sql_trigger.cc: With new GRL implementation there is no need to explicitly acquire protection against GRL before changing table triggers. This happens automatically in code which acquires metadata locks on tables which triggers are to be changed. sql/sql_update.cc: Fix bug exposed by GRL testing. During prepare phase acquire only S metadata locks instead of SW locks to keep prepare of multi-UPDATE compatible with concurrent LOCK TABLES WRITE and global read lock. sql/sql_view.cc: With new GRL implementation there is no need to explicitly acquire protection against GRL before creating view. This happens automatically in code which acquires metadata lock on view to be created. sql/sql_yacc.yy: LEX::protect_against_global_read_lock member is no longer necessary since protection against GRL is automatically taken by code acquiring metadata locks/opening tables. sql/table.cc: Adjusted code to the fact that one now needs specify duration of lock when initializing MDL_request. sql/table.h: Adjusted code to the fact that one now needs specify duration of lock when initializing MDL_request. sql/transaction.cc: Replaced custom implementation of global read lock with one based on metadata locks. Consequently when doing commit instead of calling method of Global_read_lock class to acquire protection against GRL we simply acquire IX in COMMIT namespace. Also adjusted code to the fact that MDL savepoint is now represented by MDL_savepoint class.
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Sunanda Menon authored
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Sunanda Menon authored
( Based on review comments)
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Marc Alff authored
This fix is a follow up on the fix for similar issue 56761. When sanitizing data read from the events_waits_history_long table, the code needs also to sanitize the schema_name / object_name / file_name pointers, because such pointers could also hold invalid values. Checking the string length alone was required but not sufficient. This fix verifies that: - the table schema and table name used in table io events - the file name used in file io events are valid pointers before dereferencing these pointers.
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Mattias Jonsson authored
with on duplicate key update There was a missed corner case in the partitioning handler, which caused the next_insert_id to be changed in the second level handlers (i.e the hander of a partition), which caused this debug assertion. The solution was to always ensure that only the partitioning level generates auto_increment values, since if it was done within a partition, it may fail to match the partition function. mysql-test/suite/parts/inc/partition_auto_increment.inc: Added tests mysql-test/suite/parts/r/partition_auto_increment_blackhole.result: updated results mysql-test/suite/parts/r/partition_auto_increment_innodb.result: updated results mysql-test/suite/parts/r/partition_auto_increment_memory.result: updated results mysql-test/suite/parts/r/partition_auto_increment_myisam.result: updated results sql/ha_partition.cc: In <engine>::write_row the auto_inc value is generated through handler::update_auto_increment (which calls <engine>::get_auto_increment() if needed). If: * INSERT_ID was set to 0 * it was updated to 0 by 'INSERT ... ON DUPLICATE KEY UPDATE' and changed partitions for the row Then it would try to generate a auto_increment value in the <engine for a specific partition>::write_row, which will trigger the assert. So the solution is to prevent this by, in ha_partition::write_row set auto_inc_field_not_null and add MODE_NO_AUTO_VALUE_ON_ZERO in ha_partition::update_row (when changing partition) temporary set table->next_number_field to NULL which calling the partitions ::write_row().
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