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The bug caused a memory overwrite in the function update_ref_and_keys()
It happened due to a wrong value of SELECT_LEX::cond_count. This value
historically was calculated by the fix_fields method. Now the logic of
calling this method became too complicated and, as a result, this value
is calculated not always correctly.
The patch changes the way how and when the values of SELECT_LEX::cond_count
and of SELECT_LEX::between_count are calculated. The new code does it just at
the beginning of update_ref_and_keys().
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Following variables do not require LOCK_open protection anymore:
- table_def_cache (renamed to tdc_hash) is protected by rw-lock
LOCK_tdc_hash;
- table_def_shutdown_in_progress doesn't need LOCK_open protection;
- last_table_id use atomics;
- TABLE_SHARE::ref_count (renamed to TABLE_SHARE::tdc.ref_count)
is protected by TABLE_SHARE::tdc.LOCK_table_share;
- TABLE_SHARE::next, ::prev (renamed to tdc.next and tdc.prev),
oldest_unused_share, end_of_unused_share are protected by
LOCK_unused_shares;
- TABLE_SHARE::m_flush_tickets (renamed to tdc.m_flush_tickets)
is protected by TABLE_SHARE::tdc.LOCK_table_share;
- refresh_version (renamed to tdc_version) use atomics.
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remove TDC_RT_REMOVE_NOT_OWN_AND_MARK_NOT_USABLE
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use get_table_def_key() instead of create_table_def_key() where appropriate
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Fixed main.innodb_mysql_sync failure.
TDC_RT_REMOVE_NOT_OWN_KEEP_SHARE is not same as
TDC_RT_REMOVE_NOT_OWN_AND_MARK_NOT_USABLE. Comment in sql_table.cc says:
Storage engine has requested exclusive lock only for prepare phase
and we are not under LOCK TABLES.
Don't mark TABLE_SHARE as old in this case, as this won't allow opening
of table by other threads during main phase of in-place ALTER TABLE.
At this moment we hold exclusive metadata lock, all we should do
is purge unused TABLE objects.
sql/sql_base.cc:
Restore 5.6 behavior of TDC_RT_REMOVE_NOT_OWN_KEEP_SHARE.
sql/sql_base.h:
Restore 5.6 behavior of TDC_RT_REMOVE_NOT_OWN_KEEP_SHARE.
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includes:
* remove some remnants of "Bug#14521864: MYSQL 5.1 TO 5.5 BUGS PARTITIONING"
* introduce LOCK_share, now LOCK_ha_data is strictly for engines
* rea_create_table() always creates .par file (even in "frm-only" mode)
* fix a 5.6 bug, temp file leak on dummy ALTER TABLE
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perfschema.binlog_* tests work.
revno: 4559
committer: Marc Alff <marc.alff@oracle.com>
branch nick: mysql-5.6-bug14741537-v4
timestamp: Thu 2012-11-08 22:40:31 +0100
message:
Bug#14741537 - MYSQL 5.6, GTID AND PERFORMANCE_SCHEMA
Before this fix, statements using performance_schema tables:
- were marked as unsafe for replication,
- did cause warnings during execution,
- were written to the binlog, either in STATEMENT or ROW format.
When using replication with the new GTID feature,
unsafe warnings are elevated to errors,
which prevents to use both the performance_schema and GTID together.
The root cause of the problem is not related to raising warnings/errors
in some special cases, but deeper: statements involving the performance
schema should not even be written to the binary log in the first place,
because the content of the performance schema tables is 'local' to a server
instance, and may differ greatly between nodes in a replication
topology.
In particular, the DBA should be able to configure (INSERT, UPDATE, DELETE)
or flush (TRUNCATE) performance schema tables on one node,
without affecting other nodes.
This fix introduces the concept of a 'non-replicated' or 'local' table,
and adjusts the replication logic to ignore tables that are not replicated
when deciding if or how to log a statement to the binlog.
Note that while this issue was detected using the performance_schema,
other tables are also affected by the same problem.
This fix define as 'local' the following tables, which are then never
replicated:
- performance_schema.*
- mysql.general_log
- mysql.slow_log
- mysql.slave_relay_log_info
- mysql.slave_master_info
- mysql.slave_worker_info
Existing behavior for information_schema.* is unchanged by this fix,
to limit the scope of changes.
Coding wise, this fix implements the following changes:
1)
Performance schema tables are not using any replication flags,
since performance schema tables are not replicated.
2)
In open_table_from_share(),
tables with no replication capabilities (performance_schema.*),
tables with TABLE_CATEGORY_LOG (logs)
and tables with TABLE_CATEGORY_RPL_INFO (replication)
are marked as non replicated, with TABLE::no_replicate
3)
A new THD member, THD::m_binlog_filter_state,
indicate if the current statement is written to the binlog
(normal cases for most statements), or is to be discarded
(because the statements affects non replicated tables).
4)
In THD::decide_logging_format(), the replication logic
is changed to take into account non replicated tables.
Statements that affect only non replicated tables are
executed normally (no warning or errors), but not written
to the binlog.
Statements that affect (i.e., write to) a replicated table
while also using (i.e., reading from or writing to) a non replicated table
are executed normally in MIXED and ROW binlog format,
and cause a new error in STATEMENT binlog format.
THD::decide_logging_format() uses THD::m_binlog_filter_state
to indicate if a statement is to be ignored, when writing to
the binlog.
5)
In THD::binlog_query(), statements marked as ignored
are not written to the binary log.
6)
For row based replication, the existing test for 'table->no_replicate',
has been moved from binlog_log_row() to check_table_binlog_row_based().
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- After the merge from mysql-5.6, open_tables() did not call
open_and_process_table() for temporary table. The logic was that temporary
tables were already opened when mysql_execute_command() has called
open_temporary_tables().
This worked for the most part, except for temporary tables of type MERGE. for
which open_and_process_table() must call
table->file->extra(HA_EXTRA_ADD_CHILDREN_LIST).
Failure to make this call resulted in crash further in execution.
tables->table->file->extra(HA_EXTRA_ADD_CHILDREN_LIST)
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Merged the majority of the PFS test cases.
There are still 19 failing test cases that need more attention.
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Merged all ddl_logging code.
Merged sql_partition.cc
innodb_mysql_lock2.test and partition_cache.test now works.
Changed interface to strconvert() to make it easier to use with not \0 terminated strings.
sql/sql_partition.cc:
Full merge with 5.6
sql/sql_table.cc:
Merged all ddl_logging code
sql/strfunc.cc:
Added from_length argument to strconvert() to make it possible to use without end terminated strings.
sql/strfunc.h:
Added from_length argument to strconvert() to make it possible to use without end terminated strings.
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mysql-test/r/mdl_sync.result:
Full merge with 5.6
mysql-test/t/mdl_sync.test:
Full merge with 5.6
sql/debug_sync.cc:
Full merge with 5.6
sql/debug_sync.h:
Full merge with 5.6
sql/mdl.cc:
Full merge with 5.6
sql/sql_base.cc:
Removed code not in 5.6 anymore
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CF_PREOPEN_TMP_TABLES & CF_HA_CLOSE & Patch for Bug#11746602 (27480: Extend CREATE TEMPORARY TABLES
privilege to allow temp table operations).
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Fixed type and testing of last_update type for innodb_table_stats
mysql-test/r/connect.result:
Removed tables which are not created anymore
sql/item_sum.h:
Fixed typo
sql/sql_base.cc:
Don't update table and index statics for temporary tables
sql/sys_vars.cc:
Merge
storage/innobase/dict/dict0stats.cc:
Fixed type last_update to TIMESTAMP.
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TABLE) fixed.
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Disabled some asserts that we can't yet have enabled
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- temporary tables now works
- mysql-system_tables updated to not use temporary tables
- PASSWORD() function fixed
- Support for STATS_AUTO_RECALC, STATS_PERSISTENT and STATS_SAMPLE_PAGES table options
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- mdl.cc and mdl.h merged completely
- mysql_system_tables*.sql merged completely
- Fixed wrong merge of lock_tables
- Added some missing functions:
- bool THD::notify_shared_lock()
- Dynamic_array::pop, Dynamic_array::del
- Added MDL_context_owner to THD
- Added metadata_locks_hash_instances
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of ARZ file
Implement discovery of table non-existence, and related changes:
1. Split GTS_FORCE_DISCOVERY (that was meaning two different things in
two different functions) into GTS_FORCE_DISCOVERY and GTS_USE_DISCOVERY.
2. Move GTS_FORCE_DISCOVERY implementation into open_table_def().
3. In recover_from_failed_open() clear old errors *before* discovery,
not after successful discovery. The final error should come
from the discovery.
4. On forced discovery delete table .frm first. Discovery will write
a new one, if desired.
5. If the frm file exists, but not the table in the engine, force
rediscovery if the engine supports it.
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(without InnoDB - all InnoDB changes were ignored)
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with a bit of lame protection against abuse.
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Merge of 10.0-mdev26 feature tree into 10.0-base.
Global transaction ID is prepended to each event group in the binlog.
Slave connect can request to start from GTID position instead of specifying
file name/offset of master binlog. This facilitates easy switch to a new
master.
Slave GTID state is stored in a table mysql.rpl_slave_state, which can be
InnoDB to get crash-safe slave state.
GTID includes a replication domain ID, allowing to keep track of distinct
positions for each of multiple masters.
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Fix remaining two sporadic test failures in the full test suite:
- Remove crash in DBUG_ASSERT() in _db_flush() (bug also exists in main
tree).
- Fix locking order violation for LOCK_status by temporarily unlocking it
while locking LOCK_active_mi (like a similar fix for
LOCK_global_variables).
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Fix lock order violation. Make sure we temporarily release
LOCK_global_system_variables before taking LOCK_active_mi.
Otherwise we get a lock dependency cycle when we use
open_tables() under LOCK_active_mi.
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MDEV-26: Global transaction id, partial commit
Change server_id to be a session variable.
User with SUPER can set it to binlog with different server_id.
Implement backward-compatible ::server_id mirror for plugins.
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simplify ha_table_share_psi()
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fulltext search was initialized for all MATCH ... AGAINST items
at the end of the JOIN::optimize(). But since 5.3 derived tables
are initialized lazily on first use, very late in the sub_select().
Skip Item_func_match::init_search initialization if the corresponding
table isn't open yet; repeat fulltext initialization for all
not-yet-initialized MATCH ... AGAINST items after creating derived tables.
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mysys/errors.c:
revert upstream's fix. use a much simpler one
mysys/my_write.c:
revert upstream's fix. use a simpler one
sql/item_xmlfunc.cc:
useless, but ok
sql/mysqld.cc:
simplify upstream's fix
storage/heap/hp_delete.c:
remove upstream's fix.
we'll use a much less expensive approach.
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use it to test main test cases with need_full_discover_for_existence > 0
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Now CREATE TABLE does not write the frm file on disk,
if the engine can discover it
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from everywhere - now RENAME, SHOW FULL TABLES, and TRUNCATE work with discovery.
improve error messages in truncate
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fixes for need_full_discover_for_existence mode
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