This bug manifested itself for queries with grouping by columns of
the BIT type. It led to wrong comparisons of bit-field values and
wrong result sets.
Bit-field values never cannot be compared as binary values. Yet
the class Field_bit had an implementation of the cmp method that
compared bit-fields values as binary values. 
Also the get_image and set_image methods of the base class Field 
cannot be used for objects of the Field_bit class. 
Now these methods are declared as virtual and specific implementations
of the methods are provided for the class Field_bit.


mysql-test/r/type_bit.result:
  Added a test case for bug #30219.
mysql-test/t/type_bit.test:
  Added a test case for bug #30219.
sql/field.h:
  Fix bug #30219.
  This bug manifested itself for queries with grouping by columns of
  the BIT type. It led to wrong comparisons of bit-field values and
  wrong result sets.
  Bit-field values never cannot be compared as binary values. Yet
  the class Field_bit had an implementation of the cmp method that
  compared bit-fields values as binary values.
  Also the get_image and set_image methods of the base class Field
  cannot be used for objects of the Field_bit class. 
  Now these methods are declared as virtual and specific implementations
  of these methods are provided for the class Field_bit.

A test case was waiting for a fixed number of seconds for a specific 
state of the slave IO thread to take place.
Fixed by waiting in a loop for that specific thread state instead 
(or timeout).


mysql-test/t/rpl_relayspace.test:
  Bug #25228: fixed test case

into  magare.gmz:/home/kgeorge/mysql/autopush/B30193-5.0-opt

into  gleb.loc:/home/uchum/work/bk/5.0-opt

into  gleb.loc:/home/uchum/work/bk/5.0-opt


sql/sql_parse.cc:
  Auto merged

The SELECT query with more than 31 nested dependent SELECT queries returned
wrong result.

New error message has been added: ER_TOO_HIGH_LEVEL_OF_NESTING_FOR_SELECT.
It will be reported as: "Too high level of nesting for select".


sql/sql_parse.cc:
  Fixed bug #27352.
  The Item_sum::register_sum_func method has been modified to return
  TRUE on exceeding of allowed level of SELECT nesting and to report
  corresponding error message.
sql/unireg.h:
  Fixed bug #27352.
  Constant definition has been added: maximal allowed level of SELECT nesting.
mysql-test/t/select.test:
  Updated test case for bug #27352.
mysql-test/r/select.result:
  Updated test case for bug #27352.
sql/share/errmsg.txt:
  Fixed bug #27352.
  New error message has been added: ER_TOO_HIGH_LEVEL_OF_NESTING_FOR_SELECT.

When DROP TABLE detects that it has been killed
by another thread it must unlock the table names
it locked.

Fixed by backporting the 5.1 error handling code.


sql/sql_table.cc:
  Bug #30193: correct error handling when a thread 
  is killed inside DROP TABLE.

keep_files_on_create made a startup option


sql/mysqld.cc:
  Addendum to bug #29325
  keep_files_on_create made a startup option

into  moonbone.local:/mnt/gentoo64/work/24989-bug-5.0-opt-mysql

  Warning fixed.


sql/ha_innodb.cc:
  Warning fixed.

into  magare.gmz:/home/kgeorge/mysql/autopush/B27417-5.0-opt


sql/handler.cc:
  Auto merged
sql/sp_head.cc:
  Auto merged
sql/sql_class.cc:
  Auto merged
sql/sql_class.h:
  Auto merged

extend the assert so it will run the testsuite

into  mysql.com:/home/psergey/mysql-5.0-bug29582


sql/sql_select.cc:
  Auto merged
sql/sql_select.h:
  Auto merged

- Don't call mysql_select() several times for the select that enumerates
  a temporary table with the results of the UNION. Making this call for
  every subquery execution caused O(#enumerated-rows-in-the-outer-query) 
  memory allocations.
- Instead, call join->reinit() and join->exec(), and
  = disable constant table detection for such joins,  
  = provide special handling for table-less constant subqueries.


sql/sql_select.cc:
  BUG#29582: huge memory consumption with union, subselect, joins:
   - Don't mark tables as constant if JOIN::no_const_tables flag is set
sql/sql_select.h:
  BUG#29582: huge memory consumption with union, subselect, joins:
   - Don't mark tables as constant if JOIN::no_const_tables flag is set
sql/sql_union.cc:
  BUG#29582: huge memory consumption with union, subselect, joins:
  - Don't call mysql_select() several times for the select that enumerates
    a temporary table with UNION results. 
  - Instead, call join->reinit() and join->exec().
  - Provide special handling for table-less constant subqueries.

into  mysql.com:/home/hf/work/29717/my50-29717

into  gleb.loc:/home/uchum/work/bk/5.0-opt

into  gleb.loc:/home/uchum/work/bk/5.0-opt

into  mysql.com:/home/hf/work/29717/my50-29717


mysql-test/t/insert_select.test:
  Auto merged
sql/sql_select.cc:
  Auto merged
mysql-test/r/group_by.result:
  merging
mysql-test/r/insert_select.result:
  merging
mysql-test/t/group_by.test:
  merging
sql/sql_select.h:
  merging

into  mysql.com:/home/hf/work/29717/my41-29717


sql/sql_select.cc:
  Auto merged

 SELECT statement itself returns empty.

As a result of this bug 'SELECT AGGREGATE_FUNCTION(fld) ... GROUP BY'
can return one row instead of an empty result set.

When GROUP BY only has fields of constant tables
(with a single row), the optimizer deletes the group_list.
After that we lose the information about whether we had an
GROUP BY statement. Though it's important
as SELECT min(x) from empty_table; and
   SELECT min(x) from empty_table GROUP BY y; have to return
different results - the first query should return one row,
second - an empty result set.
So here we add the 'group_optimized_away' flag to remember this case
when GROUP BY exists in the query and is removed
by the optimizer, and check this flag in end_send_group()


mysql-test/r/group_by.result:
  Bug #29717 INSERT INTO SELECT inserts values even if
   SELECT statement itself returns empty.
  
  test result
mysql-test/r/insert_select.result:
  Bug #29717 INSERT INTO SELECT inserts values even if
   SELECT statement itself returns empty.
  
  test result
mysql-test/t/group_by.test:
  Bug #29717 INSERT INTO SELECT inserts values even if
   SELECT statement itself returns empty.
  
  This is additional testcase that is more basic than the
  original bug's testcase and has the same reason.
mysql-test/t/insert_select.test:
  Bug #29717 INSERT INTO SELECT inserts values even if
   SELECT statement itself returns empty.
  
  test case
sql/sql_select.cc:
  Bug #29717 INSERT INTO SELECT inserts values even if
   SELECT statement itself returns empty.
  
  Remember the 'GROUP BY was optimized away' case in the JOIN::group_optimized
  and check this in the end_send_group()
sql/sql_select.h:
  Bug #29717 INSERT INTO SELECT inserts values even if
   SELECT statement itself returns empty.
  
  JOIN::group_optimized member added to remember the 'GROUP BY optimied away'
  case

  Fixing a typo in the test case.


mysql-test/t/bigint.test:
  Fixing a typo in the test case.

Bug #27417 thd->no_trans_update.stmt lost value inside of SF-exec-stack
  
Once had been set the flag might later got reset inside of a stored routine 
execution stack.
The reason was in that there was no check if a new statement started at time 
of resetting.
The artifact affects most of binlogable DML queries. Notice, that multi-update 
is wrapped up within
  bug@27716 fix, multi-delete bug@29136.
  
Fixed with saving parent's statement flag of whether the statement modified 
non-transactional table, and unioning (merging) the value with that was gained 
in mysql_execute_command.
  
Resettling thd->no_trans_update members into thd->transaction.`member`;
Asserting code;
Effectively the following properties are held.
  
1. At the end of a substatement thd->transaction.stmt.modified_non_trans_table
   reflects the fact if such a table got modified by the substatement.
   That also respects THD::really_abort_on_warnin() requirements.
2. Eventually thd->transaction.stmt.modified_non_trans_table will be computed as
   the union of the values of all invoked sub-statements.
   That fixes this bug#27417;

Computing of thd->transaction.all.modified_non_trans_table is refined to base to 
the stmt's value for all the case including insert .. select statement which 
before the patch had an extra issue bug@28960.
Minor issues are covered with mysql_load, mysql_delete, and binloggin of insert in
to temp_table select. 
  
The supplied test verifies limitely, mostly asserts. The ultimate testing is defered
for bug@13270, bug@23333.


mysql-test/r/mix_innodb_myisam_binlog.result:
  results changed
mysql-test/t/mix_innodb_myisam_binlog.test:
  regression test incl the related bug#28960.
sql/ha_ndbcluster.cc:
  thd->transaction.{all,stmt}.modified_non_trans_table
  instead of
  thd->no_trans_update.{all,stmt}
sql/handler.cc:
  thd->transaction.{all,stmt}.modified_non_trans_table
  instead of
  thd->no_trans_update.{all,stmt}
sql/handler.h:
  new member added
sql/log.cc:
  thd->transaction.{all,stmt}.modified_non_trans_table
  instead of
  thd->no_trans_update.{all,stmt}
sql/set_var.cc:
  thd->transaction.{all,stmt}.modified_non_trans_table
  instead of
  thd->no_trans_update.{all,stmt}
sql/sp_head.cc:
  thd->transaction.{all,stmt}.modified_non_trans_table
  instead of
  thd->no_trans_update.{all,stmt}
  
  and saving and merging stmt's flag at the end of a substatement.
sql/sql_class.cc:
  thd->transaction.{all,stmt}.modified_non_trans_table
  instead of
  thd->no_trans_update.{all,stmt}
sql/sql_class.h:
  thd->transaction.{all,stmt}.modified_non_trans_table
  instead of
  thd->no_trans_update.{all,stmt}
sql/sql_delete.cc:
  correcting basic delete incl truncate branch and multi-delete queries to set
  stmt.modified_non_trans_table;
  optimization to set the flag at the end of per-row loop;
  multi-delete still has an extra issue similar to bug#27716 of multi-update 
  - to be address with bug_29136 fix.
sql/sql_insert.cc:
  thd->transaction.{all,stmt}.modified_non_trans_table
  instead of
  thd->no_trans_update.{all,stmt}
sql/sql_load.cc:
  eliminating a separate issue where the stmt flag was saved and re-stored after 
  write_record that actually could change it and the change would be lost but 
  should remain permanent;
  thd->transaction.{all,stmt}.modified_non_trans_table
  instead of
  thd->no_trans_update.{all,stmt}
sql/sql_parse.cc:
  initialization to transaction.stmt.modified_non_trans_table at the common part 
  of all types of statements processing - mysql_execute_command().
sql/sql_table.cc:
  moving the reset up to the mysql_execute_command() caller
sql/sql_update.cc:
  correcting update query case (multi-update part of the issues covered by other 
  bug#27716 fix)
  thd->transaction.{all,stmt}.modified_non_trans_table
  instead of
  thd->no_trans_update.{all,stmt}

into  moonbone.local:/mnt/gentoo64/work/24989-bug-5.0-opt-mysql


sql/ha_innodb.cc:
  Auto merged
sql/handler.cc:
  Auto merged
sql/sql_class.cc:
  Auto merged
sql/sql_class.h:
  Auto merged

When innodb detects a deadlock it calls ha_rollback_trans() to rollback the 
main transaction. But such action isn't allowed from inside of triggers and
functions. When it happen the 'Explicit or implicit commit' error is thrown
even if there is no commit/rollback statements in the trigger/function. This
leads to the user confusion.

Now the convert_error_code_to_mysql() function doesn't call the 
ha_rollback_trans() function directly but rather calls the
mark_transaction_to_rollback function and returns an error.
The sp_rcontext::find_handler() now doesn't allow errors to be caught by the
trigger/function error handlers when the thd->is_fatal_sub_stmt_error flag
is set. Procedures are still allowed to catch such errors.
The sp_rcontext::find_handler function now accepts a THD handle as a parameter.
The transaction_rollback_request and the is_fatal_sub_stmt_error flags are 
added to the THD class. The are initialized by the THD class constructor.
Now the ha_autocommit_or_rollback function rolls back main transaction
when not in a sub statement and the thd->transaction_rollback_request
is set.
The THD::restore_sub_statement_state function now resets the 
thd->is_fatal_sub_stmt_error flag on exit from a sub-statement.


sql/ha_innodb.cc:
  Bug#24989: The DEADLOCK error is improperly handled by InnoDB.
  Now the convert_error_code_to_mysql() function doesn't call the
  ha_rollback_trans() function directly but rather calls the
  mark_transaction_to_rollback function and returns an error.
sql/handler.cc:
  Bug#24989: The DEADLOCK error is improperly handled by InnoDB.
  Now the ha_autocommit_or_rollback function rolls back main transaction
  when not in a sub statement and the thd->transaction_rollback_request
  is set.
mysql-test/r/innodb-big.result:
  Added a test case for the bug#24989: The DEADLOCK error is improperly handled by
  InnoDB.
mysql-test/t/innodb-big.test:
  Added a test case for the bug#24989: The DEADLOCK error is improperly handled by
  InnoDB.
sql/sql_class.h:
  Bug#24989: The DEADLOCK error is improperly handled by InnoDB.
  The transaction_rollback_request and the is_fatal_sub_stmt_error flags are 
  added to the THD class.
sql/sql_class.cc:
  Bug#24989: The DEADLOCK error is improperly handled by InnoDB.
  Initialization of the transaction_rollback_request and the
  is_fatal_sub_stmt_error flags are added to the THD class constructor.
  The mark_transaction_to_rollback function is added.
  The THD::restore_sub_statement_state function now resets the
  thd->is_fatal_sub_stmt_error flag on exit from a sub-statement.
sql/sp_rcontext.h:
  Bug#24989: The DEADLOCK error is improperly handled by InnoDB.
  The sp_rcontext::find_handler function now accepts a THD handle as a parameter.
  The in_sub_stmt flag is added to the sp_rcontext class.
sql/sp_rcontext.cc:
  Bug#24989: The DEADLOCK error is improperly handled by InnoDB.
  The sp_rcontext::find_handler() now doesn't allow errors to be caught by the
  trigger/function error handlers when the thd->is_fatal_sub_stmt_error flag
  is set. Instead it tries to find a most inner procedure that isn't called
  directly or indirectly from any function/trigger.
  Procedures are still allowed to catch such errors.
  The sp_rcontext::find_handler function now accepts a THD handle as a parameter.

a place where it would not obstruct
correct multithreading.

SP with local variables with non-ASCII names crashed the server.

The server replaces SP local variable names with NAME_CONST calls
when putting statements into the binary log. It used UTF8-encoded
item names as variable names for the replacement inside NAME_CONST
calls. However, statement string may be encoded by any
known character set by the SET NAMES statement.
The server used byte length of UTF8-encoded names to increment
the position in the query string that led to array index overrun.


sql/item.cc:
  Fixed bug #30120.
  The Item_splocal class constructor has been modified to
  accept new parameter `len_in_q': the byte length of
  variable name in the query string.
sql/item.h:
  Fixed bug #30120.
  The Item_splocal class has been modified to keep new
  field `len_in_query': the byte length of variable name in
  the query string.
sql/sp_head.cc:
  Fixed bug #30120.
  The subst_spvars function has been modified to increment
  position in the query string by the lengths of not
  encoded variable names instead of byte length of names
  encoded to UTF-8.
sql/sql_yacc.yy:
  Fixed bug #30120.
  The simple_ident rule action has been modified to
  pass the byte length of the local variable name token
  to the Item_splocal object constructor.
mysql-test/t/sp.test:
  Updated test case for bug #30120.
mysql-test/r/sp.result:
  Updated test case for bug #30120.

into  moonbone.local:/mnt/gentoo64/work/29856-bug-5.0-opt-mysql


sql/sp_head.cc:
  Auto merged
mysql-test/r/query_cache.result:
  SCCS merged
mysql-test/t/query_cache.test:
  SCCS merged

into  gleb.loc:/home/uchum/work/bk/5.0-opt

into  gleb.loc:/home/uchum/work/bk/5.0-opt


sql/sql_base.cc:
  Auto merged
mysql-test/r/sp.result:
  Merge with local tree.
mysql-test/t/sp.test:
  Merge with local tree.

Using view columns by their names during an execution of
a prepared SELECT statement or a SELECT statement inside
a SP caused a memory leak.


sql/sql_base.cc:
  Fixed bug #29834.
  The find_field_in_view function has been modified to
  use the execution memory root for the Item_direct_view_ref
  objects allocation at non-first executions of
  a PS/SP instead of the statement memory.
mysql-test/t/sp.test:
  Updated test case for bug #29834.
mysql-test/r/sp.result:
  Updated test case for bug #29834.

into  moonbone.local:/mnt/gentoo64/work/30020-bug-5.0-opt-mysql

into  gleb.loc:/home/uchum/work/bk/5.0-opt

information schema table.

The get_schema_views_record() function fills records in the view table of
the informations schema with data about given views. Among other info
the is_updatable flag is set. But the check whether the view is updatable or
not wasn't covering all cases thus sometimes providing wrong info.
This might led to a user confusion.

Now the get_schema_views_record function additionally calls to the 
view->can_be_merge() function to find out whether the view can be updated or
not.


mysql-test/t/view.test:
  Added a test case for the bug#30020: Insufficient check led to a wrong info
  provided by the information schema table.
mysql-test/r/view.result:
  Added a test case for the bug#30020: Insufficient check led to a wrong info
  provided by the information schema table.
sql/sql_show.cc:
  Bug#30020: Insufficient check led to a wrong info provided by the
  information schema table.
  Now the get_schema_views_record function additionally calls to the 
  view->can_be_merge() function to find out whether the view can be updated or
  not.

The subst_spvars function is used to create query string with SP variables 
substituted with their values. This string is used later for the binary log
and for the query cache. The problem is that the
query_cache_send_result_to_client function requires some additional space
after the query to store database name and query cache flags. This 
space wasn't reserved by the subst_spvars function which led to a memory
corruption and crash.

Now the subst_spvars function reserves additional space for the query cache.


mysql-test/t/query_cache.test:
  Added a test case for the bug#29856: Insufficient buffer space led to a server crash.
mysql-test/r/query_cache.result:
  Added a test case for the bug#29856: Insufficient buffer space led to a server crash.
sql/sp_head.cc:
  Bug#29856: Insufficient buffer space led to a server crash.
  Now the subst_spvars function reserves additional space for the query cache.

into  mysql.com:/home/hf/work/29878/my50-29878

Item_func_user doesn't calculate anything in it's val_str() method,
just returns saved str_value.
Though Item::save_in_field method can destroy str_value, relying on
val_str() return. As a result we get the garbage stored in field.

We cannot use Item::save_in_field implementation for Item_func_user,
reimplement it in simpler way.


mysql-test/r/rpl_session_var.result:
  Bug #29878 Garbage data generation when executing SESSION_USER() on a slave.
  
  test result
mysql-test/t/rpl_session_var.test:
  Bug #29878 Garbage data generation when executing SESSION_USER() on a slave.
  
  test case
sql/item.cc:
  Bug #29878 Garbage data generation when executing SESSION_USER() on a slave.
  
  duplicating code moved to Item::save_str_in_field
sql/item.h:
  Bug #29878 Garbage data generation when executing SESSION_USER() on a slave.
  
  duplicating code moved to Item::save_str_in_field
sql/item_strfunc.h:
  Bug #29878 Garbage data generation when executing SESSION_USER() on a slave.
  
  Item_func_user::save_in_field implemented as simple storing str_value

into  mysql.com:/home/svoj/devel/mysql/BUG29957/mysql-5.0-engines

INSERT/DELETE/UPDATE followed by ALTER TABLE within LOCK TABLES
may cause table corruption on Windows.

That happens because ALTER TABLE writes outdated shared state
info into index file.

Fixed by removing obsolete workaround.

Affects MyISAM tables on Windows only.


myisam/mi_extra.c:
  On windows when mi_extra(HA_EXTRA_PREPARE_FOR_DELETE) is called,
  we release external lock and close index file. If we're in LOCK
  TABLES, MyISAM state info doesn't get updated until UNLOCK TABLES.
  
  That means when we release external lock and we're in LOCK TABLES,
  we may write outdated state info.
  
  As SQL layer closes all table instances, we do not need this
  workaround anymore.
mysql-test/r/alter_table.result:
  A test case for BUG#29957.
mysql-test/t/alter_table.test:
  A test case for BUG#29957.