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Author SHA1 Message Date
Alexander Nozdrin
609bc2c407 Reverting a patch for Bug#45445 (cannot execute procedures with thread_stack set to 128k). 
Some platforms don't work with 4 * STACK_MIN_SIZE.
Thus, reverting back to 8 * STACK_MIN_SIZE and waiting for another fix.
 2010-10-13 13:34:02 +04:00
Dmitry Shulga
cd81c833a8 A follow up for the patch for Bug#45445, increase stack size 
to fix an sp-error.test failure on Sun Sparc system.
 2010-10-12 19:19:33 +07:00
Dmitry Shulga
60d558d89d Fixed bug#45445 - cannot execute procedures with thread_stack 
set to 128k.

mysql-test/collections/default.experimental:
  Re-enabled test rpl.rpl_row_sp011*.
sql/sp_head.cc:
  sp_head::execute() modified: pass constant value 2 * STACK_MIN_SIZE
  instead of 8 * STACK_MIN_SIZE  as a second argument value
  in call to check_stack_overrun.
 2010-10-07 18:57:12 +07:00
Alexander Nozdrin
ad264fa287 Fix use of uninitialized variable. 2010-08-12 16:51:46 +04:00
Alfranio Correia
88b3205653 BUG#50312 Warnings for unsafe sub-statement not returned to client 
After BUG#36649, warnings for sub-statements are cleared when a 
new sub-statement is started. This is problematic since it suppresses
warnings for unsafe statements in some cases. It is important that we
always give a warning to the client, because the user needs to know
when there is a risk that the slave goes out of sync.
                        
We fixed the problem by generating warning messages for unsafe statements
while returning from a stored procedure, function, trigger or while
executing a top level statement.
                        
We also started checking unsafeness when both performance and log tables are
used. This is necessary after the performance schema which does a distinction
between performance and log tables.

mysql-test/extra/rpl_tests/create_recursive_construct.inc:
  Changed the order of the calls in the procedure because the code
  that checks if a warning message is printed out expects that the
  first statement gives an warning what is not the case for INSERT
  INTO ta$CRC_ARG_level VALUES (47);
mysql-test/suite/binlog/r/binlog_stm_unsafe_warning.result:
  Updated the result file.
mysql-test/suite/binlog/r/binlog_unsafe.result:
  There are several changes here:
          
  (1) - Changed the CREATE PROCEDURE $CRC.
                                  
  (2) - The procedure $CRC was failing and the content of the binlog
        was being printed out, after fix (1) the failure disappeared.
                                  
  (3) - The warning message for unsafeness due to auto-increment collumns was
        changed.
                                  
  (4) - The warning message for unsafeness due to VERSION(), RAND() was changed.
mysql-test/suite/binlog/t/binlog_stm_unsafe_warning.test:
  Tested filters.
mysql-test/suite/binlog/t/binlog_unsafe.test:
  Reenabled the test case binlog_unsafe.
mysql-test/suite/binlog/t/disabled.def:
  Reenabled the test case binlog_unsafe.
mysql-test/suite/rpl/r/rpl_begin_commit_rollback.result:
  Updated the result file.
mysql-test/suite/rpl/r/rpl_non_direct_stm_mixing_engines.result:
  Updated the result file.
mysql-test/suite/rpl/r/rpl_stm_auto_increment_bug33029.result:
  Updated the result file.
sql/sql_class.cc:
  Moved the stmt_accessed_table_flag variable and related information to the
  LEX as we need the variable reset after each statement even inside a stored
  procedure, what did not happen if the information was in the THD.
          
  Changed the routine in the THD::binlog_query that prints the warning
  messages to avoid trying to print them when inside a stored procedure,
  function or trigger.
                          
  Checked for unsafeness when both performance and log tables where used.
  After the introduction of the performance schema, we need to check both.
 2010-08-10 12:32:54 +01:00
Alexander Nozdrin
a0ab253fbd Auto-merge from mysql-trunk-bugfixing. 
******
This patch fixes the following bugs:
  - Bug#5889: Exit handler for a warning doesn't hide the warning in
    trigger
  - Bug#9857: Stored procedures: handler for sqlwarning ignored
  - Bug#23032: Handlers declared in a SP do not handle warnings generated
    in sub-SP
  - Bug#36185: Incorrect precedence for warning and exception handlers

The problem was in the way warnings/errors during stored routine execution
were handled. Prior to this patch the logic was as follows:

  - when a warning/an error happens: if we're executing a stored routine,
    and there is a handler for that warning/error, remember the handler,
    ignore the warning/error and continue execution.

  - after a stored routine instruction is executed: check for a remembered
    handler and activate one (if any).

This logic caused several problems:

  - if one instruction generates several warnings (errors) it's impossible
    to choose the right handler -- a handler for the first generated
    condition was chosen and remembered for activation.

  - mess with handling conditions in scopes different from the current one.

  - not putting generated warnings/errors into Warning Info (Diagnostic
    Area) is against The Standard.

The patch changes the logic as follows:

  - Diagnostic Area is cleared on the beginning of each statement that
    either is able to generate warnings, or is able to work with tables.

  - at the end of a stored routine instruction, Diagnostic Area is left
    intact.

  - Diagnostic Area is checked after each stored routine instruction. If
    an instruction generates several condition, it's now possible to take a
    look at all of them and determine an appropriate handler.

mysql-test/r/signal.result:
  Update result file:
    1. handled conditions are not cleared any more;
    2. reflect changes in signal.test
mysql-test/r/signal_demo3.result:
  Update result file: handled conditions are not cleared any more.
  Due to playing with max_error_count, resulting warning lists
  have changed.
mysql-test/r/sp-big.result:
  Update result file: handled conditions are not cleared any more.
mysql-test/r/sp-bugs.result:
  Update result file: handled conditions are not cleared any more.
mysql-test/r/sp-code.result:
  Update result file:
    1. handled conditions are not cleared any more.
    2. add result for a new test case in sp-code.test.
mysql-test/r/sp-error.result:
  Update result file:
    1. handled conditions are not cleared any more.
    2. add result for a new test case in sp-error.test.
mysql-test/r/sp.result:
  Update result file: handled conditions are not cleared any more.
mysql-test/r/sp_trans.result:
  Update result file: handled conditions are not cleared any more.
mysql-test/r/strict.result:
  Update result file: handled conditions are not cleared any more.
mysql-test/r/view.result:
  Update result file: handled conditions are not cleared any more.
mysql-test/suite/funcs_1/r/innodb_storedproc_02.result:
  Update result file: handled conditions are not cleared any more.
mysql-test/suite/funcs_1/r/memory_storedproc_02.result:
  Update result file: handled conditions are not cleared any more.
mysql-test/suite/funcs_1/r/myisam_storedproc_02.result:
  Update result file: handled conditions are not cleared any more.
mysql-test/suite/funcs_1/r/storedproc.result:
  Update result file: handled conditions are not cleared any more.
mysql-test/suite/rpl/r/rpl_row_sp005.result:
  Update result file: handled conditions are not cleared any more.
mysql-test/suite/rpl/r/rpl_row_sp006_InnoDB.result:
  Update result file: handled conditions are not cleared any more.
mysql-test/suite/rpl/r/rpl_row_trig003.result:
  Update result file: handled conditions are not cleared any more.
mysql-test/t/signal.test:
  Make a test case more readable in the result file.
mysql-test/t/sp-code.test:
  Add a test case for Bug#23032 checking that
  No Data takes precedence on Warning.
mysql-test/t/sp-error.test:
  Adding test cases for:
    - Bug#23032
    - Bug#36185
    - Bug#5889
    - Bug#9857
mysql-test/t/sp.test:
  Fixing test case to reflect behavioral changes made by the patch.
sql/sp_head.cc:
  Reset the per-statement warning count before executing
  a stored procedure instruction.
  
  Move to a separate function code which checks the
  completion status of the executed statement and searches
  for a handler.
  
  Remove redundant code now that search for a handler is
  done after execution, errors are always pushed.
sql/sp_pcontext.h:
  Remove unused code.
sql/sp_rcontext.cc:
  - Polish sp_rcontext::find_handler(): use sp_rcontext::m_hfound instead
    of an extra local variable;
  
  - Remove sp_rcontext::handle_condition();
  
  - Introduce sp_rcontext::activate_handler(), which prepares
    previously found handler for execution.
  
  - Move sp_rcontext::enter_handler() code into activate_handler(),
    because enter_handler() is used only from there;
  
  - Cleanups;
  
  - Introduce DBUG_EXECUTE_IF() for a test case in sp-code.test
sql/sp_rcontext.h:
  - Remove unused code
  - Cleanups
sql/sql_class.cc:
  Merge THD::raise_condition_no_handler() into THD::raise_condition().
  After the patch raise_condition_no_handler() was called
  in raise_condition() only.
sql/sql_class.h:
  Remove raise_condition_no_handler().
sql/sql_error.cc:
  Remove Warning_info::reserve_space() -- handled conditions are not
  cleared any more, so there is no need for RESIGNAL to re-push them.
sql/sql_error.h:
  Remove Warning_info::reserve_space().
sql/sql_signal.cc:
  Handled conditions are not cleared any more,
  so there is no need for RESIGNAL to re-push them.
 2010-07-30 19:28:36 +04:00
Konstantin Osipov
36290c0923 A pre-requisite patch for the fix for Bug#52044. 
This patch also fixes Bug#55452 "SET PASSWORD is
replicated twice in RBR mode".

The goal of this patch is to remove the release of 
metadata locks from close_thread_tables().
This is necessary to not mistakenly release
the locks in the course of a multi-step
operation that involves multiple close_thread_tables()
or close_tables_for_reopen().

On the same token, move statement commit outside 
close_thread_tables().

Other cleanups:
Cleanup COM_FIELD_LIST.
Don't call close_thread_tables() in COM_SHUTDOWN -- there
are no open tables there that can be closed (we leave
the locked tables mode in THD destructor, and this
close_thread_tables() won't leave it anyway).

Make open_and_lock_tables() and open_and_lock_tables_derived()
call close_thread_tables() upon failure.
Remove the calls to close_thread_tables() that are now
unnecessary.

Simplify the back off condition in Open_table_context.

Streamline metadata lock handling in LOCK TABLES 
implementation.

Add asserts to ensure correct life cycle of 
statement transaction in a session.

Remove a piece of dead code that has also become redundant
after the fix for Bug 37521.

mysql-test/r/variables.result:
  Update results: set @@autocommit and statement transaction/
  prelocked mode.
mysql-test/r/view.result:
  A harmless change in CHECK TABLE <view> status for a broken view.
  If previously a failure to prelock all functions used in a view 
  would leave the connection in LTM_PRELOCKED mode, now we call
  close_thread_tables() from open_and_lock_tables()
  and leave prelocked mode, thus some check in mysql_admin_table() that
  works only in prelocked/locked tables mode is no longer activated.
mysql-test/suite/rpl/r/rpl_row_implicit_commit_binlog.result:
  Fixed Bug#55452 "SET PASSWORD is replicated twice in
  RBR mode": extra binlog events are gone from the
  binary log.
mysql-test/t/variables.test:
  Add a test case: set autocommit and statement transaction/prelocked
  mode.
sql/event_data_objects.cc:
  Simplify code in Event_job_data::execute().
  Move sp_head memory management to lex_end().
sql/event_db_repository.cc:
  Move the release of metadata locks outside
  close_thread_tables().
  Make sure we call close_thread_tables() when
  open_and_lock_tables() fails and remove extra
  code from the events data dictionary.
  Use close_mysql_tables(), a new internal
  function to properly close mysql.* tables
  in the data dictionary.
  Contract Event_db_repository::drop_events_by_field,
  drop_schema_events into one function.
  When dropping all events in a schema,
  make sure we don't mistakenly release all
  locks acquired by DROP DATABASE. These
  include locks on the database name
  and the global intention exclusive
  metadata lock.
sql/event_db_repository.h:
  Function open_event_table() does not require an instance 
  of Event_db_repository.
sql/events.cc:
  Use close_mysql_tables() instead of close_thread_tables()
  to bootstrap events, since the latter no longer
  releases metadata locks.
sql/ha_ndbcluster.cc:
  - mysql_rm_table_part2 no longer releases
  acquired metadata locks. Do it in the caller.
sql/ha_ndbcluster_binlog.cc:
  Deploy the new protocol for closing thread
  tables in run_query() and ndb_binlog_index
  code.
sql/handler.cc:
  Assert that we never call ha_commit_trans/
  ha_rollback_trans in sub-statement, which
  is now the case.
sql/handler.h:
  Add an accessor to check whether THD_TRANS object
  is empty (has no transaction started).
sql/log.cc:
  Update a comment.
sql/log_event.cc:
  Since now we commit/rollback statement transaction in 
  mysql_execute_command(), we need a mechanism to communicate
  from Query_log_event::do_apply_event() to mysql_execute_command()
  that the statement transaction should be rolled back, not committed.
  Ideally it would be a virtual method of THD. I hesitate
  to make THD a virtual base class in this already large patch.
  Use a thd->variables.option_bits for now.
  
  Remove a call to close_thread_tables() from the slave IO
  thread. It doesn't open any tables, and the protocol
  for closing thread tables is more complicated now.
  
  Make sure we properly close thread tables, however, 
  in Load_data_log_event, which doesn't
  follow the standard server execution procedure
  with mysql_execute_command().
  @todo: this piece should use Server_runnable
  framework instead.
  Remove an unnecessary call to mysql_unlock_tables().
sql/rpl_rli.cc:
  Update Relay_log_info::slave_close_thread_tables()
  to follow the new close protocol.
sql/set_var.cc:
  Remove an unused header.
sql/slave.cc:
  Remove an unnecessary call to
  close_thread_tables().
sql/sp.cc:
  Remove unnecessary calls to close_thread_tables()
  from SP DDL implementation. The tables will
  be closed by the caller, in mysql_execute_command().
  When dropping all routines in a database, make sure
  to not mistakenly drop all metadata locks acquired
  so far, they include the scoped lock on the schema.
sql/sp_head.cc:
  Correct the protocol that closes thread tables
  in an SP instruction.
  Clear lex->sphead before cleaning up lex
  with lex_end to make sure that we don't
  delete the sphead twice. It's considered
  to be "cleaner" and more in line with
  future changes than calling delete lex->sphead
  in other places that cleanup the lex.
sql/sp_head.h:
  When destroying m_lex_keeper of an instruction,
  don't delete the sphead that all lex objects
  share. 
  @todo: don't store a reference to routine's sp_head
  instance in instruction's lex.
sql/sql_acl.cc:
  Don't call close_thread_tables() where the caller will
  do that for us.
  Fix Bug#55452 "SET PASSWORD is replicated twice in RBR 
  mode" by disabling RBR replication in change_password()
  function.
  Use close_mysql_tables() in bootstrap and ACL reload
  code to make sure we release all metadata locks.
sql/sql_base.cc:
  This is the main part of the patch:
  - remove manipulation with thd->transaction
  and thd->mdl_context from close_thread_tables().
  Now this function is only responsible for closing
  tables, nothing else.
  This is necessary to be able to easily use
  close_thread_tables() in procedures, that
  involve multiple open/close tables, which all
  need to be protected continuously by metadata
  locks.
  Add asserts ensuring that TABLE object
  is only used when is protected by a metadata lock.
  Simplify the back off condition of Open_table_context,
  we no longer need to look at the autocommit mode.
  Make open_and_lock_tables() and open_normal_and_derived_tables()
  close thread tables and release metadata locks acquired so-far 
  upon failure. This simplifies their usage.
  Implement close_mysql_tables().
sql/sql_base.h:
  Add declaration for close_mysql_tables().
sql/sql_class.cc:
  Remove a piece of dead code that has also become redundant
  after the fix for Bug 37521.
  The code became dead when my_eof() was made a non-protocol method,
  but a method that merely modifies the diagnostics area.
  The code became redundant with the fix for Bug#37521, when 
  we started to cal close_thread_tables() before
  Protocol::end_statement().
sql/sql_do.cc:
  Do nothing in DO if inside a substatement
  (the assert moved out of trans_rollback_stmt).
sql/sql_handler.cc:
  Add comments.
sql/sql_insert.cc:
  Remove dead code. 
  Release metadata locks explicitly at the
  end of the delayed insert thread.
sql/sql_lex.cc:
  Add destruction of lex->sphead to lex_end(),
  lex "reset" method called at the end of each statement.
sql/sql_parse.cc:
  Move close_thread_tables() and other related
  cleanups to mysql_execute_command()
  from dispatch_command(). This has become
  possible after the fix for Bug#37521.
  Mark federated SERVER statements as DDL.
  
  Next step: make sure that we don't store
  eof packet in the query cache, and move
  the query cache code outside mysql_parse.
  
  Brush up the code of COM_FIELD_LIST.
  Remove unnecessary calls to close_thread_tables().
  
  When killing a query, don't report "OK"
  if it was a suicide.
sql/sql_parse.h:
  Remove declaration of a function that is now static.
sql/sql_partition.cc:
  Remove an unnecessary call to close_thread_tables().
sql/sql_plugin.cc:
  open_and_lock_tables() will clean up
  after itself after a failure.
  Move close_thread_tables() above
  end: label, and replace with close_mysql_tables(),
  which will also release the metadata lock
  on mysql.plugin.
sql/sql_prepare.cc:
  Now that we no longer release locks in close_thread_tables()
  statement prepare code has become more straightforward.
  Remove the now redundant check for thd->killed() (used
  only by the backup project) from Execute_server_runnable.
  Reorder code to take into account that now mysql_execute_command()
  performs lex->unit.cleanup() and close_thread_tables().
sql/sql_priv.h:
  Add a new option to server options to interact
  between the slave SQL thread and execution
  framework (hack). @todo: use a virtual
  method of class THD instead.
sql/sql_servers.cc:
  Due to Bug 25705 replication of 
  DROP/CREATE/ALTER SERVER is broken.
  Make sure at least we do not attempt to 
  replicate these statements using RBR,
  as this violates the assert in close_mysql_tables().
sql/sql_table.cc:
  Do not release metadata locks in mysql_rm_table_part2,
  this is done by the caller.
  Do not call close_thread_tables() in mysql_create_table(),
  this is done by the caller. 
  Fix a bug in DROP TABLE under LOCK TABLES when,
  upon error in wait_while_table_is_used() we would mistakenly
  release the metadata lock on a non-dropped table.
  Explicitly release metadata locks when doing an implicit
  commit.
sql/sql_trigger.cc:
  Now that we delete lex->sphead in lex_end(),
  zero the trigger's sphead in lex after loading
  the trigger, to avoid double deletion.
sql/sql_udf.cc:
  Use close_mysql_tables() instead of close_thread_tables().
sql/sys_vars.cc:
  Remove code added in scope of WL#4284 which would
  break when we perform set @@session.autocommit along
  with setting other variables and using tables or functions.
  A test case added to variables.test.
sql/transaction.cc:
  Add asserts.
sql/tztime.cc:
  Use close_mysql_tables() rather than close_thread_tables().
 2010-07-27 14:25:53 +04:00
Konstantin Osipov
cc6dabba37 Merge trunk-bugfixing -> trunk-runtime 2010-06-17 17:31:51 +04:00
Kristofer Pettersson
fd674a938c merge 5.1-bugteam => trunk-merge 2010-06-08 12:17:07 +02:00
Kristofer Pettersson
cf2e7c770c Bug#53191 Lock_time in slow log is negative when logging stored routines 
Logging slow stored procedures caused the slow log to write 
very large lock times. The lock times was a result of a 
negative number being cast to an unsigned integer.
The reason the lock time appeard negative was because 
one of the measurements points was reset after execution
causing it to change order with the start time of the 
statement.
      
This bug is related to bug 47905 which in turn was 
introduced because of a joint fix for 12480,12481,12482 and 11587.

The fix is to only reset the start_time before any statement
execution in a SP while not resetting start_utime or
utime_after_lock which are used for measuring the 
performance of the SP. Start_time is used to set the
timestamp on the replication event which controlls how
the slave interprets time functions like NOW().
 2010-06-08 10:58:19 +02:00
Jon Olav Hauglid
142a162c66 manual merge from mysql-trunk-bugfixing 
Conflicts:
Text conflict in mysql-test/r/archive.result
Contents conflict in mysql-test/r/innodb_bug38231.result
Text conflict in mysql-test/r/mdl_sync.result
Text conflict in mysql-test/suite/binlog/t/disabled.def
Text conflict in mysql-test/suite/rpl_ndb/r/rpl_ndb_binlog_format_errors.result
Text conflict in mysql-test/t/archive.test
Contents conflict in mysql-test/t/innodb_bug38231.test
Text conflict in mysql-test/t/mdl_sync.test
Text conflict in sql/sp_head.cc
Text conflict in sql/sql_show.cc
Text conflict in sql/table.cc
Text conflict in sql/table.h
 2010-06-06 13:19:29 +02:00
Davi Arnaut
ba48581438 Backport a old cleanup patch. 
Formatting cleanup: removing tabs and trailing spaces
to conform to MySQL Internals Coding Guidelines.
 2010-05-28 18:00:18 -03:00
Alexander Nozdrin
59a9912963 Auto-merge from mysql-trunk. 2010-05-28 09:47:58 +04:00
Dmitry Lenev
bee0f214fd Pre-requisite patch for bug #51263 "Deadlock between 
transactional SELECT and ALTER TABLE ... REBUILD PARTITION".

The goal of this patch is to decouple type of metadata
lock acquired for table by open_tables() from type of
table-level lock to be acquired on it.

To achieve this we change approach to how we determine what
type of metadata lock should be acquired on table to be open.
Now instead of inferring it at open_tables() time from flags
and type of table-level lock we rely on that type of metadata
lock is properly set at parsing time and is not changed
further.

sql/ha_ndbcluster.cc:
  Now one needs to properly initialize table list element's
  MDL_request object before calling mysql_rm_table_part2().
sql/lock.cc:
  lock_table_names() no longer initializes table list elements'
  MDL_request objects. Now proper initialization of these
  requests is a responsibility of the caller.
sql/lock.h:
  Removed MYSQL_OPEN_TAKE_UPGRADABLE_MDL flag which became
  unnecessary. Thanks to the fact that we don't reset type of
  requests for metadata locks between re-executions we now can
  figure out that upgradable locks are requested by simply
  looking at their type which were set in the parser. As result
  this flag became redundant.
sql/mdl.h:
  Added version of new operator which simplifies allocation of
  MDL_request objects on a MEM_ROOT.
sql/sp_head.cc:
  Added comment explaining why it is OK to infer type of
  metadata lock to request from type of table-level lock
  for prelocking.
  Added enum_mdl_type argument to sp_add_to_query_tables()
  to simplify its usage in trigger implementation.
sql/sp_head.h:
  Added enum_mdl_type argument to sp_add_to_query_tables()
  to simplify its usage in trigger implementation.
sql/sql_base.cc:
  - open_table_get_mdl_lock():
    Preserve type of MDL_request for table list element which
    was set in the parser by creating MDL_request objects on
    memory root if MYSQL_OPEN_FORCE_SHARED_MDL or
    MYSQL_OPEN_FORCE_SHARED_HIGH_PRIO_MDL flag were specified.
    Thanks to this and to the fact that we no longer reset
    type of requests for metadata locks between re-executions
    we no longer need to acquire exclusive metadata lock on
    table to be created in a special way. This lock is acquired
    by code handling acquiring of upgradable locks.
    Also changed signature/calling convention for this function
    to simplify its usage.
  - Accordingly special lock strategy for table list elements
    which was used for such locks became unnecessary and was
    removed. Other strategies were renamed.
  - Since we no longer have guarantee that MDL_request object
    which were not satisfied due to lock conflict belongs to
    table list element Open_table_context class and its methods
    were extended to remember pointer to MDL_request which has
    caused problem at request_backoff_action() time and use it
    in recover_from_failed_open(). Similar approach is used
    for cases when problem from which we need to recover is
    not related to MDL but to the table itself. In this case
    we store pointer to the element of table list.
  - Changed open_tables()/open_tables_check_upgradable_mdl()/
    open_tables_acquire_upgradable_mdl() not to rely on
    MYSQL_OPEN_TAKE_UPGRADABLE_MDL flag to understand when
    upgradable metadata locks should be acquired and not to
    infer type of MDL lock from type of table-level lock.
    Instead we assume that type of MDL to be acquired was set
    in the parser (we can do this as type of MDL_request is
    no longer reset between re-executions).
sql/sql_class.h:
  Since we no longer have guarantee that MDL_request object
  which were not satisfied due to lock conflict belongs to
  table list element Open_table_context class and its methods
  were extended to remember pointer to MDL_request which has
  caused problem at request_backoff_action() time and use it
  in recover_from_failed_open(). Similar approach is used
  for cases when problem from which we need to recover is
  not related to MDL but to the table itself. In this case
  we store pointer to the element of table list.
sql/sql_db.cc:
  Now one needs to properly initialize table list element's
  MDL_request object before calling mysql_rm_table_part2()
  or mysql_rename_tables().
sql/sql_lex.cc:
  st_select_lex/st_select_lex_node::add_table_to_list() method
  now has argument which allows specify type of metadata lock
  to be requested for table list element being added.
sql/sql_lex.h:
  - st_select_lex/st_select_lex_node::add_table_to_list()
    method now has argument which specifies type of metadata
    lock to be requested for table list element being added.
    This allows to explicitly set type of MDL lock to be
    acquired for a DDL statement in parser. It is also more
    future-proof than inferring type of MDL request from type
    of table-level lock.
  - Added Yacc_state::m_mdl_type member which specifies which
    type of metadata lock should be requested for tables to be
    added to table list by a grammar rule in cases when the same
    rule is used in several statements requiring different kinds
    of metadata locks.
sql/sql_parse.cc:
  - st_select_lex::add_table_to_list() method now has argument
    which specifies type of metadata lock to be requested for
    table list element being added. This allows to explicitly
    set type of MDL lock to be acquired for a DDL statement in
    parser. It is also more future-proof than inferring type of
    MDL request from type of table-level lock.
  - EXCLUSIVE_DOWNGRADABLE_MDL lock strategy has a new name -
    OTLS_DOWNGRADE_IF_EXISTS.
  - Adjusted LOCK TABLES implementation to the fact that we no
    longer infer type of metadata lock to be acquired from table
    level lock and that type of MDL request is set at parsing.
    And thus MYSQL_OPEN_TAKE_UPGRADABLE_MDL flag became
    unnecessary.
sql/sql_prepare.cc:
  TABLE_LIST's lock strategy SHARED_MDL was renamed to OTLS_NONE
  as now it means that metadata lock should not be changed during
  call to open_table() (if it has been already acquired) and is
  also used for exclusive metadata lock.
sql/sql_show.cc:
  st_select_lex::add_table_to_list() method now has argument
  which specifies type of metadata lock to be requested for
  table list element being added.
sql/sql_table.cc:
  - Adjusted mysql_admin_table()'s code to the fact that
    open_tables() no longer determines what kind of metadata
    lock should be obtained basing on type of table-level
    lock and flags. Instead type of metadata lock for table
    to be open should be set before calling open_tables().
  - Changed mysql_alter_table() code to the facts:
    a) that now it is responsibility of caller to properly
    initalize MDL_request in table list elements before calling
    lock_table_names()
    b) and that MYSQL_OPEN_TAKE_UPGRADABLE_MDL is no longer
    necessary since type of metadata lock to be obtained
    at open_tables() time is set during parsing.
  - Changed code of mysql_recreate_table() to properly set
    type of metadata and table-level lock to be obtained
    by mysql_alter_table() which it calls.
sql/sql_trigger.cc:
  Instead of relying on MYSQL_OPEN_TAKE_UPGRADABLE_MDL flag to
  force open_tables() to take an upgradable lock we now specify
  exact type of lock to be taken when constructing table list
  element for table to be open for CREATE/DROP TRIGGER.
sql/sql_view.cc:
  We no longer use TABLE_LIST::EXCLUSIVE_MDL strategy to force
  open_tables() to take an exclusive metadata lock on view to
  be created. Instead we rely on parser setting proper type of
  metadata lock to request and open_tables() acquiring it.
  This became possible thanks to the fact that we no longer
  reset type of MDL_request between statement re-executions.
sql/sql_yacc.yy:
  Instead of inferring type of MDL_request for table to be
  open from type of table-level lock and flags passed to
  open_tables() we now explicitly specify them at parsing.
  This became possible thanks to the fact that we no longer
  reset type of MDL_request between statement re-executions.
  In future this should allow to decouple type of metadata
  lock from type of table-level lock.
  The only exception to this approach is statements implemented
  through mysql_admin_table() which re-uses same table list
  element several times with different types of table-level
  and metadata locks.
  We now also properly initialize MDL_request objects for table
  list elements which are later passed to lock_table_names()
  function.
sql/table.cc:
  Do not reset type of MDL_request between statement
  re-executions. This became unnecessesary as we no longer
  change type of MDL_request residing in table list element.
  In its turn this change allows to set type of MDL_request
  only once - at parsing time.
sql/table.h:
  Got rid of TABLE_LIST::EXCLUSIVE_MDL lock strategy.
  Now we can specify that we need to acquire exclusive lock
  on table to be processed by open_tables() through setting
  an appropriate type of MDL_request at parsing time (this
  became possible thanks to the fact that we no longer reset
  types of MDL_request's belonging to table list elements
  between statement re-execution).
  Strategy SHARED_MDL was renamed to OTLS_NONE as now it
  means that metadata lock should not be changed during call
  to open_table() (if it has been already acquired) and is
  also used for exclusive metadata lock.
  Strategy EXCLUSIVE_DOWNGRADABLE_MDL was renamed to
  OTLS_DOWNGRADE_IF_EXISTS.
 2010-05-25 16:35:01 +04:00
Alexey Kopytov
77b0e89328 Manual merge of mysql-5.1-bugteam to mysql-trunk-merge. 
Conflicts:

Text conflict in mysql-test/r/explain.result
Text conflict in mysql-test/t/explain.test
Text conflict in sql/net_serv.cc
Text conflict in sql/sp_head.cc
Text conflict in sql/sql_priv.h
 2010-05-07 20:17:55 +04:00
Konstantin Osipov
1ab519d91f Committing on behalf or Dmitry Lenev: 
Fix for bug #46947 "Embedded SELECT without FOR UPDATE is
causing a lock", with after-review fixes.

SELECT statements with subqueries referencing InnoDB tables
were acquiring shared locks on rows in these tables when they
were executed in REPEATABLE-READ mode and with statement or
mixed mode binary logging turned on.

This was a regression which were introduced when fixing
bug 39843.

The problem was that for tables belonging to subqueries
parser set TL_READ_DEFAULT as a lock type. In cases when
statement/mixed binary logging at open_tables() time this
type of lock was converted to TL_READ_NO_INSERT lock at
open_tables() time and caused InnoDB engine to acquire
shared locks on reads from these tables. Although in some
cases such behavior was correct (e.g. for subqueries in
DELETE) in case of SELECT it has caused unnecessary locking.

This patch tries to solve this problem by rethinking our
approach to how we handle locking for SELECT and subqueries.
Now we always set TL_READ_DEFAULT lock type for all cases
when we read data. When at open_tables() time this lock
is interpreted as TL_READ_NO_INSERT or TL_READ depending
on whether this statement as a whole or call to function
which uses particular table should be written to the
binary log or not (if yes then statement should be properly
serialized with concurrent statements and stronger lock
should be acquired).

Test coverage is added for both InnoDB and MyISAM.

This patch introduces an "incompatible" change in locking
scheme for subqueries used in SELECT ... FOR UPDATE and
SELECT .. IN SHARE MODE.
In 4.1 the server would use a snapshot InnoDB read for 
subqueries in SELECT FOR UPDATE and SELECT .. IN SHARE MODE
statements, regardless of whether the binary log is on or off.
If the user required a different type of read (i.e. locking read),
he/she could request so explicitly by providing FOR UPDATE/IN SHARE MODE
clause for each individual subquery.
On of the patches for 5.0 broke this behaviour (which was not documented
or tested), and started to use locking reads fora all subqueries in SELECT ... 
FOR UPDATE/IN SHARE MODE. This patch restored 4.1 behaviour.

mysql-test/include/check_concurrent_insert.inc:
  Added auxiliary script which allows to check if statement
  reading table allows concurrent inserts in it.
mysql-test/include/check_no_concurrent_insert.inc:
  Added auxiliary script which allows to check that statement
  reading table doesn't allow concurrent inserts in it.
mysql-test/include/check_no_row_lock.inc:
  Added auxiliary script which allows to check if statement
  reading table doesn't take locks on its rows.
mysql-test/include/check_shared_row_lock.inc:
  Added auxiliary script which allows to check if statement
  reading table takes shared locks on some of its rows.
mysql-test/r/bug39022.result:
  After bug #46947 'Embedded SELECT without FOR UPDATE is
  causing a lock' was fixed test case for bug 39022 has to
  be adjusted in order to trigger execution path on which
  original problem was encountered.
mysql-test/r/innodb_mysql_lock2.result:
  Added coverage for handling of locking in various cases when
  we read data from InnoDB tables (includes test case for
  bug #46947 'Embedded SELECT without FOR UPDATE is causing a
  lock').
mysql-test/r/lock_sync.result:
  Added coverage for handling of locking in various cases when
  we read data from MyISAM tables.
mysql-test/t/bug39022.test:
  After bug #46947 'Embedded SELECT without FOR UPDATE is
  causing a lock' was fixed test case for bug 39022 has to
  be adjusted in order to trigger execution path on which
  original problem was encountered.
mysql-test/t/innodb_mysql_lock2.test:
  Added coverage for handling of locking in various cases when
  we read data from InnoDB tables (includes test case for
  bug #46947 'Embedded SELECT without FOR UPDATE is causing a
  lock').
mysql-test/t/lock_sync.test:
  Added coverage for handling of locking in various cases when
  we read data from MyISAM tables.
sql/log_event.cc:
  Since LEX::lock_option member was removed we no longer can
  rely on its value in Load_log_event::print_query() to
  determine that log event correponds to LOAD DATA CONCURRENT
  statement (this was not correct in all situations anyway).
  A new Load_log_event's member was introduced as a replacement.
  It is initialized at event object construction time and
  explicitly indicates whether LOAD DATA was concurrent.
sql/log_event.h:
  Since LEX::lock_option member was removed we no longer can
  rely on its value in Load_log_event::print_query() to
  determine that log event correponds to LOAD DATA CONCURRENT
  statement (this was not correct in all situations anyway).
  A new Load_log_event's member was introduced as a replacement.
  It is initialized at event object construction time and
  explicitly indicates whether LOAD DATA was concurrent.
sql/sp_head.cc:
  sp_head::reset_lex():
    Before parsing substatement reset part of parser state
    which needs this (e.g. set Yacc_state::m_lock_type to
    default value).
sql/sql_acl.cc:
  Since LEX::reset_n_backup_query_tables_list() now also
  resets LEX::sql_command member (as it became part of
  Query_tables_list class) we have to restore it in cases
  when while working with proxy Query_table_list we assume
  that LEX::sql_command still corresponds to original SQL
  command being executed (for example, when we are logging
  statement to the binary log while having Query_tables_list
  reset and backed up).
sql/sql_base.cc:
  Changed read_lock_type_for_table() to return a weak TL_READ
  type of lock in cases when we are executing statement which
  won't update tables directly and table doesn't belong to
  statement's prelocking list and thus can't be used by a
  stored function. It is OK to do so since in this case table
  won't be used by statement or function call which will be
  written to the binary log, so serializability requirements
  for it can be relaxed.
  One of results from this change is that SELECTs on InnoDB
  tables no longer takes shared row locks for tables which
  are used in subqueries (i.e. bug #46947 is fixed).
  Another result is that for similar SELECTs on MyISAM tables
  concurrent inserts are allowed.
  In order to implement this change signature of
  read_lock_type_for_table() function was changed to take
  pointers to Query_tables_list and TABLE_LIST objects.
sql/sql_base.h:
  - Function read_lock_type_for_table() now takes pointers
    to Query_tables_list and TABLE_LIST elements as its
    arguments since to correctly determine lock type it needs
    to know what statement is being performed and whether table
    element for which lock type to be determined belongs to
    prelocking list.
sql/sql_lex.cc:
  - Removed LEX::lock_option and st_select_lex::lock_option
    members. Places in parser that were using them now use
    Yacc_state::m_lock_type instead.
  - To emphasize that LEX::sql_command member is used during
    process of opening and locking of tables it was moved to
    Query_tables_list class. It is now reset by
    Query_tables_list::reset_query_tables_list() method.
sql/sql_lex.h:
  - Removed st_select_lex::lock_option member as there is no
    real need for per-SELECT lock type (HIGH_PRIORITY option
    should apply to the whole statement. FOR UPDATE/LOCK IN
    SHARE MODE clauses can be handled without this member).
    The main effect which was achieved by introduction of this
    member, i.e. using TL_READ_DEFAULT lock type for
    subqueries, is now achieved by setting LEX::lock_option
    (or rather its replacement - Yacc_state::m_lock_type) to
    TL_READ_DEFAULT in almost all cases.
  - To emphasize that LEX::sql_command member is used during
    process of opening and locking of tables it was moved to
    Query_tables_list class.
  - Replaced LEX::lock_option with Yacc_state::m_lock_type
    in order to emphasize that this value is relevant only
    during parsing. Unlike for LEX::lock_option the default
    value for Yacc_state::m_lock_type is TL_READ_DEFAULT.
    Note that for cases when it is OK to take a "weak" read
    lock (e.g. simple SELECT) this lock type will be converted
    to TL_READ at open_tables() time. So this change won't
    cause negative change in behavior for such statements.
    OTOH this change ensures that, for example, for SELECTs
    which are used in stored functions TL_READ_NO_INSERT lock
    is taken when necessary and as result calls to such stored
    functions can be written to the binary log with correct
    serialization.
sql/sql_load.cc:
  Load_log_event constructor now requires a parameter that
  indicates whether LOAD DATA is concurrent.
sql/sql_parse.cc:
  LEX::lock_option was replaced with Yacc_state::m_lock_type.
  And instead of resetting the latter implicitly in
  mysql_init_multi_delete() we do it explicitly in the
  places in parser which call this function.
sql/sql_priv.h:
  - To be able more easily distinguish high-priority SELECTs
    in st_select_lex::print() method added flag for
    HIGH_PRIORITY option.
sql/sql_select.cc:
  Changed code not to rely on LEX::lock_option to determine
  that it is high-priority SELECT. It was replaced with
  Yacc_state::m_lock_type which is accessible only at
  parse time. So instead of LEX::lock_option we now rely
  on a newly introduced flag for st_select_lex::options -
  SELECT_HIGH_PRIORITY.
sql/sql_show.cc:
  Since LEX::reset_n_backup_query_tables_list() now also
  resets LEX::sql_command member (as it became part of
  Query_tables_list class) we have to restore it in cases
  when while working with proxy Query_table_list we assume
  that LEX::sql_command still corresponds to original SQL
  command being executed.
sql/sql_table.cc:
  Since LEX::reset_query_tables_list() now also resets
  LEX::sql_command member (as it became part of
  Query_tables_list class) we have to restore value of this
  member when this method is called by mysql_admin_table(),
  to make this code safe for re-execution.
sql/sql_trigger.cc:
  Since LEX::reset_n_backup_query_tables_list() now also
  resets LEX::sql_command member (as it became part of
  Query_tables_list class) we have to restore it in cases
  when while working with proxy Query_table_list we assume
  that LEX::sql_command still corresponds to original SQL
  command being executed (for example, when we are logging
  statement to the binary log while having Query_tables_list
  reset and backed up).
sql/sql_update.cc:
  Function read_lock_type_for_table() now takes pointers
  to Query_tables_list and TABLE_LIST elements as its
  arguments since to correctly determine lock type it needs
  to know what statement is being performed and whether table
  element for which lock type to be determined belongs to
  prelocking list.
sql/sql_yacc.yy:
  - Removed st_select_lex::lock_option member as there is no
    real need for per-SELECT lock type (HIGH_PRIORITY option
    should apply to the whole statement. FOR UPDATE/LOCK IN
    SHARE MODE clauses can be handled without this member).
    The main effect which was achieved by introduction of this
    member, i.e. using TL_READ_DEFAULT lock type for
    subqueries, is now achieved by setting LEX::lock_option
    (or rather its replacement - Yacc_state::m_lock_type) to
    TL_READ_DEFAULT in almost all cases.
  - Replaced LEX::lock_option with Yacc_state::m_lock_type
    in order to emphasize that this value is relevant only
    during parsing. Unlike for LEX::lock_option the default
    value for Yacc_state::m_lock_type is TL_READ_DEFAULT.
    Note that for cases when it is OK to take a "weak" read
    lock (e.g. simple SELECT) this lock type will be converted
    to TL_READ at open_tables() time. So this change won't
    cause negative change in behavior for such statements.
    OTOH this change ensures that, for example, for SELECTs
    which are used in stored functions TL_READ_NO_INSERT lock
    is taken when necessary and as result calls to such stored
    functions can be written to the binary log with correct
    serialization.
  - To be able more easily distinguish high-priority SELECTs
    in st_select_lex::print() method we now use new flag
    in st_select_lex::options bit-field.
 2010-04-28 14:04:11 +04:00
Alexander Nozdrin
e642701c32 Manual merge from mysql-trunk. 
Conflicts:
  - mysql-test/suite/rpl/r/rpl_stm_mixing_engines.result
 2010-04-27 13:58:21 +04:00
Alexey Kopytov
fa3b2dcb83 Manual merge of mysql-5.1-bugteam to 
mysql-trunk-merge.

Conflicts:

Text conflict in sql/sql_priv.h
 2010-04-19 16:09:44 +04:00
Konstantin Osipov
4288e329dd A fix for Bug#11918 "SP does not accept variables in LIMIT clause" 
Allow stored procedure variables in LIMIT clause.
Only allow variables of INTEGER types. 
Handle negative values by means of an implicit cast to UNSIGNED 
(similarly to prepared statement placeholders).
Add tests.
Make sure replication works by not doing NAME_CONST substitution
for variables in LIMIT clause.
Add replication tests.

mysql-test/r/sp.result:
  Update results (Bug#11918).
mysql-test/suite/rpl/r/rpl_sp.result:
  Update results (Bug#11918).
mysql-test/suite/rpl/t/rpl_sp.test:
  Add a test case for Bug#11918.
mysql-test/t/sp.test:
  Add a test case for Bug#11918.
sql/item.cc:
  Mark sp variables in LIMIT clause (a hack for replication).
sql/item.h:
  Mark sp variables in LIMIT clause (a hack for replication).
sql/share/errmsg-utf8.txt:
  Add a new error message (a type mismatch for LIMIT
  clause parameter).
sql/sp_head.cc:
  Binlog rewrite sp variables in LIMIT clause without NAME_CONST
  substitution.
sql/sql_string.cc:
  Implement append_ulonglong method.
sql/sql_string.h:
  Declare append_ulonglong().
sql/sql_yacc.yy:
  Support stored procedure variables in LIMIT.
 2010-04-14 01:56:19 +04:00
Mats Kindahl
46bd78b9ee WL#5030: Splitting mysql_priv.h 
Adding my_global.h first in all files using
NO_EMBEDDED_ACCESS_CHECKS.

Correcting a merge problem resulting from a changed definition
of check_some_access compared to the original patches.
 2010-04-07 13:58:40 +02:00
Alexey Kopytov
3df8e88dd8 Manual merge of mysql-5.1-bugteam into mysql-trunk-merge. 
Conflicts:

Text conflict in mysql-test/suite/binlog/r/binlog_row_mix_innodb_myisam.result
Text conflict in sql/log.cc
Text conflict in sql/set_var.cc
Text conflict in sql/sql_class.cc
 2010-04-03 21:35:51 +04:00
Davi Arnaut
7ecad98c45 Bug#50755: Crash if stored routine def contains version comments 
The problem was that a syntactically invalid trigger could cause
the server to crash when trying to list triggers. The crash would
happen due to a mishap in the backup/restore procedure that should
protect parser items which are not associated with the trigger. The
backup/restore is used to isolate the parse tree (and context) of
a statement from the load (and parsing) of a trigger. In this case,
a error during the parsing of a trigger could cause the improper
backup/restore sequence.

The solution is to properly restore the original statement context
before the parser is exited due to syntax errors in the trigger body.

mysql-test/r/trigger.result:
  Add test case result for Bug#50755
mysql-test/t/trigger.test:
  Add test case for Bug#50755
sql/sp_head.cc:
  Merge sp_head::destroy() and sp_head destructor. Retrieve THD
  from the LEX so that m_thd is not necessary.
sql/sql_lex.cc:
  Explicitly restore the original environment.
 2010-04-01 10:15:22 -03:00
Mats Kindahl
23d8586dbf WL#5030: Split and remove mysql_priv.h 
This patch:

- Moves all definitions from the mysql_priv.h file into
  header files for the component where the variable is
  defined
- Creates header files if the component lacks one
- Eliminates all include directives from mysql_priv.h
- Eliminates all circular include cycles
- Rename time.cc to sql_time.cc
- Rename mysql_priv.h to sql_priv.h
 2010-03-31 16:05:33 +02:00
Tatiana A. Nurnberg
28e95ba535 Bug#48525: trigger changes "Column 'id' cannot be null" behaviour 
CHECK_FIELD_IGNORE was treated as CHECK_FIELD_ERROR_FOR_NULL;
UPDATE...SET...NULL on NOT NULL fields behaved differently after
a trigger.

Now distinguishes between IGNORE and ERROR_FOR_NULL and save/restores
check-field options.


mysql-test/r/trigger.result:
  Show that UPDATE...SET...NULL on NOT NULL columns doesn't behave differently
  when run after a trigger.
mysql-test/t/trigger.test:
  Show that UPDATE...SET...NULL on NOT NULL columns doesn't behave differently
  when run after a trigger.
sql/field_conv.cc:
  CHECK_FIELD_IGNORE was treated as CHECK_FIELD_ERROR_FOR_NULL.
  Distinguish between the two.
sql/sp_head.cc:
  Raise error as needed.
sql/sql_class.cc:
  Save and restore check-fields options.
sql/sql_class.h:
  Make room so we can save check-fields options.
sql/sql_insert.cc:
  Raise error as needed.
 2010-03-29 03:32:30 +01:00
Alexander Nozdrin
d3755291ca Manual merge from mysql-next-mr. 
Conflicts:
  - sql/sql_base.cc
 2010-03-02 17:34:50 +03:00
Jon Olav Hauglid
e60ef89317 Followup to Bug#45225 Locking: hang if drop table with no timeout 
This patch prevents system threads and system table accesses from
using user-specified values for "lock_wait_timeout". Instead all
such accesses are done using the default value (1 year).

This prevents background tasks (such as replication, events, 
accessing stored function definitions, logging, reading time-zone
information, etc.) from failing in cases where the global value
of "lock_wait_timeout" is set very low.

The patch also simplifies the open tables API. Rather than adding
another convenience function for opening and locking system tables,
this patch removes most of the existing convenience functions for
open_and_lock_tables_derived(). Before, open_and_lock_tables() was
a convenience function that enforced derived tables handling, while
open_and_lock_tables_derived() was the main function where derived
tables handling was optional. Now, this convencience function is
gone and the main function is renamed to open_and_lock_tables(). 

No test case added as it would have required the use of --sleep to
check that system threads and system tables have a different timeout
value from the user-specified "lock_wait_timeout" system variable.
 2010-02-24 18:04:00 +01:00
Alexander Nozdrin
b3018e8613 Manual merge from mysql-trunk-merge. 
Conflicts:
  - client/mysql.cc
  - client/mysqldump.c
  - configure.in
  - mysql-test/r/csv.result
  - mysql-test/r/func_time.result
  - mysql-test/r/show_check.result
  - mysql-test/r/sp-error.result
  - mysql-test/r/sp.result
  - mysql-test/r/sp_trans.result
  - mysql-test/r/type_blob.result
  - mysql-test/r/type_timestamp.result
  - mysql-test/r/warnings.result
  - mysql-test/suite/rpl/r/rpl_sp.result
  - sql/mysql_priv.h
  - sql/mysqld.cc
  - sql/sp.cc
  - sql/sql_base.cc
  - sql/sql_table.cc
  - sql/sql_trigger.cc
  - sql/sql_view.cc
  - sql/table.h
  - sql/share/errmsg.txt
  - mysql-test/suite/sys_vars/r/log_bin_trust_routine_creators_basic.result
 2010-02-24 16:52:27 +03:00
Alexey Kopytov
0afa209018 Manual merge of mysql-5.1-bugteam to mysql-trunk-merge. 2010-02-22 00:33:11 +03:00
Tatiana A. Nurnberg
dad7b3c55e revert 48525 2010-02-22 16:58:56 +00:00
Tatiana A. Nurnberg
e0fbc5d248 Bug#48525: trigger changes "Column 'id' cannot be null" behaviour 
CHECK_FIELD_IGNORE was treated as CHECK_FIELD_ERROR_FOR_NULL;
UPDATE...SET...NULL on NOT NULL fields behaved differently after
a trigger.

Now distinguishes between IGNORE and ERROR_FOR_NULL and save/restores
check-field options.

mysql-test/r/trigger.result:
  Show that UPDATE...SET...NULL on NOT NULL columns doesn't behave differently
  when run after a trigger.
mysql-test/t/trigger.test:
  Show that UPDATE...SET...NULL on NOT NULL columns doesn't behave differently
  when run after a trigger.
sql/field_conv.cc:
  CHECK_FIELD_IGNORE was treated as CHECK_FIELD_ERROR_FOR_NULL.
  Distinguish between the two.
sql/sp_head.cc:
  raise error as needed
sql/sql_class.cc:
  Save and restore check-fields options.
sql/sql_class.h:
  Make room so we can save check-fields options.
sql/sql_insert.cc:
  raise error as needed
 2010-02-18 17:02:17 +00:00
Konstantin Osipov
a72f90bc43 Merge next-mr -> next-4284. 
mysql-test/t/disabled.def:
  Restore disabled ssl tests: SSL certificates were updated.
  Disable sp_sync.test, the test case can't work in next-4284.
mysql-test/t/partition_innodb.test:
  Disable parsing of the test case for Bug#47343, 
  the test can not work in next-4284.
mysql-test/t/ps_ddl.test:
  Update results (CREATE TABLE IF NOT EXISTS takes
  into account existence of the temporary table).
 2010-02-06 13:28:06 +03:00
Konstantin Osipov
e7b332ba83 Merge next-mr -> next-4284. 2010-02-05 01:08:08 +03:00
Konstantin Osipov
00dc9a6e70 Merge next-mr -> next-4284. 
Cherry-pick a fix Bug#37148 from next-mr, to preserve
file ids of the added files, and ensure that all the necessary
changes have been pulled.

Since initially Bug#37148 was null-merged into 6.0,
the changeset that is now being cherry-picked was likewise
null merged into next-4284.

Now that Bug#37148 has been reapplied to 6.0, try to make
it work with next-4284. This is also necessary to be able
to pull other changes from 5.1-rep into next-4284.

To resolve the merge issues use this changeset applied
to 6.0:
revid:jperkin@sun.com-20091216103628-ylhqf7s6yegui2t9
revno: 3776.1.1
committer: He Zhenxing <zhenxing.he@sun.com>
branch nick: 6.0-codebase-bugfixing
timestamp: Thu 2009-12-17 17:02:50 +0800
message:
  Fix merge problem with Bug#37148
 2010-02-04 23:15:47 +03:00
Konstantin Osipov
a9e22b5896 Merge next-mr -> next-4284-merge. 2010-02-04 20:34:15 +03:00
Konstantin Osipov
056ac55aa0 Merge next-mr -> next-4284. 2010-02-03 03:06:42 +03:00
Konstantin Osipov
665100b69d Merge next-mr -> next-4284. 2010-02-02 02:22:16 +03:00
Dmitry Lenev
eba5d30e67 Implement new type-of-operation-aware metadata locks. 
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.
 2010-02-01 14:43:06 +03:00
Alexander Nozdrin
5aa4c33e32 Manual merge from mysql-5.1-bugteam. 
Conflicts:
  - sql/mysql_priv.h
 2010-01-30 21:47:11 +03:00
Staale Smedseng
f4a16558c8 Bug #47905 stored procedures with conditional statements not 
being logged to slow query log

The problem is that the execution time for a multi-statement
stored procedure as a whole may not be accurate, and thus not
be entered into the slow query log even if the total time
exceeds long_query_time. The reason for this is that
THD::utime_after_lock used for time calculation may be reset
at the start of each new statement, possibly leaving the total
SP execution equal to the time spent executing the last
statement in the SP.

This patch stores the utime on start of SP execution, and
restores it on exit of SP execution. A test is added.


mysql-test/suite/sys_vars/r/slow_query_log_func.result:
  New test results for #47905.
mysql-test/suite/sys_vars/t/slow_query_log_func.test:
  New test case for #47905.
sql/sp_head.cc:
  Save and restore the THD::utime_after_lock on entry and 
  exit of execute_procedure().
 2010-02-11 21:10:13 +01:00
He Zhenxing
2b16517522 Backport Bug#37148 to 5.1 2010-01-24 15:03:23 +08:00
Alexander Nozdrin
a6667f8577 Manual merge from mysql-trunk-merge. 
Conflicts:
  - configure.in
  - include/m_string.h
  - mysql-test/extra/rpl_tests/rpl_row_func003.test
  - mysql-test/r/mysqlbinlog.result
  - mysql-test/r/union.result
  - mysql-test/suite/binlog/r/binlog_killed_simulate.result
  - mysql-test/suite/binlog/r/binlog_row_mix_innodb_myisam.result
  - mysql-test/suite/binlog/r/binlog_unsafe.result
  - mysql-test/suite/binlog/t/binlog_unsafe.test
  - mysql-test/suite/rpl/r/rpl_loaddata_fatal.result
  - mysql-test/suite/rpl/r/rpl_loaddata_map.result
  - mysql-test/suite/rpl/r/rpl_stm_loaddata_concurrent.result
  - mysql-test/suite/rpl/r/rpl_stm_log.result
  - mysql-test/suite/rpl/t/rpl_optimize.test
  - mysql-test/t/mysqlbinlog.test
  - mysql-test/t/union.test
  - sql/rpl_utility.h
  - sql/sql_union.cc
  - strings/Makefile.am
 2010-01-19 19:36:14 +03:00
Alfranio Correia
b4c0c1550c merge mysql-next-mr --> mysql-5.1-rpl-merge 
Conflicts:
  Text conflict in sql/sql_insert.cc
 2010-01-14 16:02:55 +00:00
unknown
16e15e6952 Manual merge from next-mr. 2010-01-12 20:07:09 +08:00
Tor Didriksen
be634ee66e Backport of 
Bug#45523 "Objects of class base_ilist should not be copyable".
               
Suppress the compiler-generated public copy constructor
and assignment operator of class base_ilist; instead, implement
move_elements_to() function which transfers ownership of elements
from one list to another.
 2010-01-12 12:32:55 +01:00
Marc Alff
e0e0f9e3d4 WL#2360 Performance schema 
Part V: performance schema implementation
 2010-01-11 18:47:27 -07:00
Alfranio Correia
5dcb0e447f merge mysql-5.1-rep+2-delivery1 --> mysql-5.1-rpl-merge 
Conflicts:

Text conflict in .bzr-mysql/default.conf
Text conflict in mysql-test/extra/rpl_tests/rpl_loaddata.test
Text conflict in mysql-test/r/mysqlbinlog2.result
Text conflict in mysql-test/suite/binlog/r/binlog_stm_mix_innodb_myisam.result
Text conflict in mysql-test/suite/binlog/r/binlog_unsafe.result
Text conflict in mysql-test/suite/rpl/r/rpl_insert_id.result
Text conflict in mysql-test/suite/rpl/r/rpl_loaddata.result
Text conflict in mysql-test/suite/rpl/r/rpl_stm_auto_increment_bug33029.result
Text conflict in mysql-test/suite/rpl/r/rpl_udf.result
Text conflict in mysql-test/suite/rpl/t/rpl_slow_query_log.test
Text conflict in sql/field.h
Text conflict in sql/log.cc
Text conflict in sql/log_event.cc
Text conflict in sql/log_event_old.cc
Text conflict in sql/mysql_priv.h
Text conflict in sql/share/errmsg.txt
Text conflict in sql/sp.cc
Text conflict in sql/sql_acl.cc
Text conflict in sql/sql_base.cc
Text conflict in sql/sql_class.h
Text conflict in sql/sql_db.cc
Text conflict in sql/sql_delete.cc
Text conflict in sql/sql_insert.cc
Text conflict in sql/sql_lex.cc
Text conflict in sql/sql_lex.h
Text conflict in sql/sql_load.cc
Text conflict in sql/sql_table.cc
Text conflict in sql/sql_update.cc
Text conflict in sql/sql_view.cc
Conflict adding files to storage/innobase.  Created directory.
Conflict because storage/innobase is not versioned, but has versioned children.  Versioned directory.
Conflict adding file storage/innobase.  Moved existing file to storage/innobase.moved.
Conflict adding files to storage/innobase/handler.  Created directory.
Conflict because storage/innobase/handler is not versioned, but has versioned children.  Versioned directory.
Contents conflict in storage/innobase/handler/ha_innodb.cc
 2010-01-07 15:39:11 +00:00
Konstantin Osipov
bf9c1b7353 Apply and review: 
3655 Jon Olav Hauglid   2009-10-19
Bug #30977 Concurrent statement using stored function and DROP FUNCTION 
           breaks SBR
Bug #48246 assert in close_thread_table

Implement a fix for:
Bug #41804 purge stored procedure cache causes mysterious hang for many
           minutes
Bug #49972 Crash in prepared statements

The problem was that concurrent execution of DML statements that
use stored functions and DDL statements that drop/modify the same
function might result in incorrect binary log in statement (and
mixed) mode and therefore break replication.

This patch fixes the problem by introducing metadata locking for
stored procedures and functions. This is similar to what is done
in Bug#25144 for views. Procedures and functions now are
locked using metadata locks until the transaction is either
committed or rolled back. This prevents other statements from
modifying the procedure/function while it is being executed. This
provides commit ordering - guaranteeing serializability across
multiple transactions and thus fixes the reported binlog problem.

Note that we do not take locks for top-level CALLs. This means
that procedures called directly are not protected from changes by
simultaneous DDL operations so they are executed at the state they
had at the time of the CALL. By not taking locks for top-level
CALLs, we still allow transactions to be started inside
procedures.

This patch also changes stored procedure cache invalidation.
Upon a change of cache version, we no longer invalidate the entire
cache, but only those routines which we use, only when a statement
is executed that uses them.

This patch also changes the logic of prepared statement validation.
A stored procedure used by a prepared statement is now validated
only once a metadata lock has been acquired. A version mismatch
causes a flush of the obsolete routine from the cache and
statement reprepare.
Incompatible changes:
1) ER_LOCK_DEADLOCK is reported for a transaction trying to access
   a procedure/function that is locked by a DDL operation in
   another connection.

2) Procedure/function DDL operations are now prohibited in LOCK
   TABLES mode as exclusive locks must be taken all at once and
   LOCK TABLES provides no way to specifiy procedures/functions to
   be locked.

Test cases have been added to sp-lock.test and rpl_sp.test.

Work on this bug has very much been a team effort and this patch
includes and is based on contributions from Davi Arnaut, Dmitry
Lenev, Magne Mæhre and Konstantin Osipov.


mysql-test/r/ps_ddl.result:
  Update results (Bug#30977).
mysql-test/r/ps_ddl1.result:
  Update results (Bug#30977).
mysql-test/r/sp-error.result:
  Update results (Bug#30977).
mysql-test/r/sp-lock.result:
  Update results (Bug#30977).
mysql-test/suite/rpl/r/rpl_sp.result:
  Update results (Bug#30977).
mysql-test/suite/rpl/t/rpl_sp.test:
  Add a test case for Bug#30977.
mysql-test/t/ps_ddl.test:
  Update comments. We no longer re-prepare a prepared statement
  when a stored procedure used in top-level CALL is changed.
mysql-test/t/ps_ddl1.test:
  Modifying stored procedure p1 no longer invalidates prepared
  statement "call p1" -- we can re-use the prepared statement
  without invalidation.
mysql-test/t/sp-error.test:
  Use a constant for an error value.
mysql-test/t/sp-lock.test:
  Add test coverage for Bug#30977.
sql/lock.cc:
  Implement lock_routine_name() - a way to acquire an 
  exclusive metadata lock (ex- name-lock) on 
  stored procedure/function.
sql/sp.cc:
  Change semantics of sp_cache_routine() -- now it has an option
  to make sure that the routine that is cached is up to date (has
  the latest sp cache version).
  
  Add sp_cache_invalidate() to sp_drop_routine(), where it was
  missing (a bug!).
  
  Acquire metadata locks for SP DDL (ALTER/CREATE/DROP). This is
  the core of the fix for Bug#30977.
  
  Since caching and cache invalidation scheme was changed, make 
  sure we don't invalidate the SP cache in the middle of a stored
  routine execution. At the same time, make sure we don't access
  stale data due to lack of invalidation. 
  For that, change ALTER FUNCTION/PROCEDURE to not use the cache,
  and SHOW PROCEDURE CODE/SHOW CREATE PROCEDURE/FUNCTION to always
  read an up to date version of the routine from the cache.
sql/sp.h:
  Add a helper wrapper around sp_cache_routine().
sql/sp_cache.cc:
  Implement new sp_cache_version() and sp_cache_flush_obsolete().
  Now we flush stale routines individually, rather than all at once.
sql/sp_cache.h:
  Update signatures of sp_cache_version() and sp_cache_flush_obsolete().
sql/sp_head.cc:
  Add a default initialization of sp_head::m_sp_cache_version.
  Remove a redundant sp_head::create().
sql/sp_head.h:
  Add m_sp_cache_version to sp_head class - we now 
  keep track of every routine in the stored procedure cache, rather than
  of the entire cache.
sql/sql_base.cc:
  Implement prelocking for stored routines. Validate stored
  routines after they were locked.
  Flush obsolete routines upon next access, one by one, not all at once
  (Bug#41804).
  Style fixes.
sql/sql_class.h:
  Rename a Open_table_context method.
sql/sql_parse.cc:
  Make sure stored procedures DDL commits the active transaction 
  (issues an implicit commit before and after).
  Remove sp_head::create(), a pure redundancy.
  Move the semantical check during alter routine inside sp_update_routine() code in order to:
  - avoid using SP cache during update, it may be obsolete.
  - speed up and simplify the update procedure.
  
  Remove sp_cache_flush_obsolete() calls, we no longer flush the entire
  cache, ever, stale routines are flushed before next use, one at a time.
sql/sql_prepare.cc:
  Move routine metadata validation to open_and_process_routine().
  Fix Bug#49972 (don't swap flags at reprepare).
  Reset Sroutine_hash_entries in reinit_stmt_before_use().
  Remove SP cache invalidation, it's now done by open_tables().
sql/sql_show.cc:
  Fix a warning: remove an unused label.
sql/sql_table.cc:
  Reset mdl_request.ticket for tickets acquired for routines inlined
  through a view, in CHECK TABLE statement, to satisfy an MDL assert.
sql/sql_update.cc:
  Move the cleanup of "translation items" to close_tables_for_reopen(),
  since it's needed in all cases when we back off, not just
  the back-off in multi-update. This fixes a bug when the server
  would crash on attempt to back off when opening tables
  for a statement that uses information_schema tables.
 2009-12-29 15:19:05 +03:00
Alexey Kopytov
e6e3b4abc3 Fixed a build failure in mysql-trunk-merge caused by a bad 
merge from mysql-5.1-bugteam.
 2009-12-28 16:59:12 +03:00
Alexey Kopytov
3ba6a2a9fa Manual merge of mysql-5.1-bugteam into mysql-trunk-merge. 
Conflicts:

mysql-test/collections/default.experimental
 2009-12-25 13:56:50 +03:00
Sergei Golubchik
1ad5bb1a69 WL#4738 streamline/simplify @@variable creation process 
Bug#16565 mysqld --help --verbose does not order variablesBug#20413 sql_slave_skip_counter is not shown in show variables
Bug#20415 Output of mysqld --help --verbose is incomplete
Bug#25430 variable not found in SELECT @@global.ft_max_word_len;
Bug#32902 plugin variables don't know their names
Bug#34599 MySQLD Option and Variable Reference need to be consistent in formatting!
Bug#34829 No default value for variable and setting default does not raise error
Bug#34834 ? Is accepted as a valid sql mode
Bug#34878 Few variables have default value according to documentation but error occurs  
Bug#34883 ft_boolean_syntax cant be assigned from user variable to global var.
Bug#37187 `INFORMATION_SCHEMA`.`GLOBAL_VARIABLES`: inconsistent status
Bug#40988 log_output_basic.test succeeded though syntactically false.
Bug#41010 enum-style command-line options are not honoured (maria.maria-recover fails)
Bug#42103 Setting key_buffer_size to a negative value may lead to very large allocations 
Bug#44691 Some plugins configured as MYSQL_PLUGIN_MANDATORY in can be disabled
Bug#44797 plugins w/o command-line options have no disabling option in --help
Bug#46314 string system variables don't support expressions
Bug#46470 sys_vars.max_binlog_cache_size_basic_32 is broken
Bug#46586 When using the plugin interface the type "set" for options caused a crash.
Bug#47212 Crash in DBUG_PRINT in mysqltest.cc when trying to print octal number
Bug#48758 mysqltest crashes on sys_vars.collation_server_basic in gcov builds
Bug#49417 some complaints about mysqld --help --verbose output
Bug#49540 DEFAULT value of binlog_format isn't the default value
Bug#49640 ambiguous option '--skip-skip-myisam' (double skip prefix)
Bug#49644 init_connect and \0
Bug#49645 init_slave and multi-byte characters
Bug#49646 mysql --show-warnings crashes when server dies


CMakeLists.txt:
  Bug#44691 Some plugins configured as MYSQL_PLUGIN_MANDATORY in can be disabled
client/mysql.cc:
  don't crash with --show-warnings when mysqld dies
config/ac-macros/plugins.m4:
  Bug#44691 Some plugins configured as MYSQL_PLUGIN_MANDATORY in can be disabled
include/my_getopt.h:
  comments
include/my_pthread.h:
  fix double #define
mysql-test/mysql-test-run.pl:
  run sys_vars suite by default
  properly recognize envirinment variables (e.g. MTR_MAX_SAVE_CORE) set to 0
  escape gdb command line arguments
mysql-test/suite/sys_vars/r/rpl_init_slave_func.result:
  init_slave+utf8 bug
mysql-test/suite/sys_vars/t/rpl_init_slave_func.test:
  init_slave+utf8 bug
mysys/my_getopt.c:
  Bug#34599 MySQLD Option and Variable Reference need to be consistent in formatting!
  Bug#46586 When using the plugin interface the type "set" for options caused a crash.
  Bug#49640 ambiguous option '--skip-skip-myisam' (double skip prefix)
mysys/typelib.c:
  support for flagset
sql/ha_ndbcluster.cc:
  backport from telco tree
sql/item_func.cc:
  Bug#49644 init_connect and \0
  Bug#49645 init_slave and multi-byte characters
sql/sql_builtin.cc.in:
  Bug#44691 Some plugins configured as MYSQL_PLUGIN_MANDATORY in can be disabled
sql/sql_plugin.cc:
  Bug#44691 Some plugins configured as MYSQL_PLUGIN_MANDATORY in can be disabled
  Bug#32902 plugin variables don't know their names
  Bug#44797 plugins w/o command-line options have no disabling option in --help
sql/sys_vars.cc:
  all server variables are defined here
storage/myisam/ft_parser.c:
  remove unnecessary updates of param->quot
storage/myisam/ha_myisam.cc:
  myisam_* variables belong here
strings/my_vsnprintf.c:
  %o and %llx
unittest/mysys/my_vsnprintf-t.c:
  %o and %llx tests
vio/viosocket.c:
  bugfix: fix @@wait_timeout to work with socket timeouts (vs. alarm thread)
 2009-12-22 10:35:56 +01:00