client/mysqltest.c:
Auto merged
mysql-test/mysql-test-run.sh:
Auto merged
mysql-test/t/ndb_autodiscover.test:
Auto merged
sql/ha_ndbcluster.h:
Auto merged
sql/item_strfunc.cc:
Auto merged
client/mysqldump.c:
Merge from 4.1 to 5.0
mysql-test/r/ndb_autodiscover.result:
Merge
ndb/test/ndbapi/create_tab.cpp:
Merge
sql/ha_ndbcluster.cc:
Merge
sql/handler.cc:
Merge
sql/handler.h:
Merge
sql/sql_base.cc:
Merge
sql/sql_table.cc:
Merge
Remove changes made by bug fix#8147. They strips list of insert_table_list to
only insert table, which results in error reported in bug #9728.
Added flag to Item to resolve ambigous fields reported in bug #8147.
sql/item.h:
Fix bug#9728 decreased functionality in "on duplicate key update".
sql/item.cc:
Fix bug#9728 decreased functionality in "on duplicate key update"
sql/sql_parse.cc:
Fix bug#9728 decreased functionality in "on duplicate key update"
sql/sql_base.cc:
Fix bug#9728 decreased functionality in "on duplicate key update".
sql/sql_yacc.yy:
Fix bug#9728 decreased functionality in "on duplicate key update"
mysql-test/t/insert_select.test:
Test case for bug#9728 Decreased functionality in "on duplicate key update".
mysql-test/r/insert_select.result:
Test case for bug#9728 Decreased functionality in "on duplicate key update".
query transformations to the PREPARE stage (prepared statements).
sql/item.h:
Remove an unused friend declaration.
sql/mysql_priv.h:
Change signature of insert_fields()
sql/sp_head.cc:
Make is_stmt_prepare_or_first_sp_execute really work: reset SP state
to EXECUTED after execution.
sql/sql_base.cc:
allocate_view_names flag of insert_fields is removed.
The purpose of this variable was to amend the case when a view
is replaced with a base table between subsequent executions of a prepared
statement: in that case the new table theoretically can be used instead
of the view. If allocate_view_names was set,
all the references to the view expressions were replaced with Item_field's
which in turn could have been resolved by their names.
But this approach doesn't work for other reasons, so let's not try
to help what must be solved by TDC.
sql/sql_class.h:
Add is_first_sp_execute() helper method.
sql/sql_handler.cc:
insert_fields signature changed.
sql/sql_lex.h:
Add a comment for variable 'first_execution'.
into neptunus.(none):/home/msvensson/mysql/bug10365
sql/ha_ndbcluster.cc:
Auto merged
sql/handler.cc:
Auto merged
sql/sql_base.cc:
Auto merged
sql/sql_table.cc:
Auto merged
- Updated after review
sql/ha_ndbcluster.cc:
Return -1 if table does not exists
sql/handler.cc:
Return -1 if table does not exists
Return 0 if table exists and it could be created
Return >0 if table existed but it could not be created.
sql/sql_base.cc:
Only need to call ha_create_table_from_engine and check if result is > 0. If that is the case, print error message
In order to make multi-delete SP friendly we need to have all table
locks for the elements of main statement table list properly set
at the end of parsing.
Also performed small cleanup: We don't need relink_tables_for_multidelete()
any longer since the only case now when TABLE_LIST::correspondent_table
is non-zero are tables in auxilary table list of multi-delete and these
tables are handled specially in mysql_multi_delete_prepare().
mysql-test/r/sp-threads.result:
Added test case for bug #11158 "Can't perform multi-delete in stored
procedure".
mysql-test/t/sp-threads.test:
Added test case for bug #11158 "Can't perform multi-delete in stored
procedure".
sql/mysql_priv.h:
- Removed third argument from the declaration of multi_delete_precheck()
as nowdays we calculate number of tables in multi-delete from which
we are going to delete rows right at the end of statement parsing.
- Introduced definition of multi_delete_set_locks_and_link_aux_tables()
which is responsible for propagation of proper table locks from
multi-delete's auxilary table list to the main list and binding
corresponding tables in these two lists.
sql/sql_base.cc:
Removed relink_tables_for_multidelete() routine and its invocations.
We don't need them in 5.0 since the only case now when
TABLE_LIST::correspondent_table is non-zero are tables in auxilary table
list of multi-delete and these tables are handled specially in
mysql_multi_delete_prepare().
sql/sql_lex.h:
LEX::table_count
Added description of new role of this LEX member for multi-delete.
Now for this statement we store number of tables from which we should
delete records there.
sql/sql_parse.cc:
multi_delete_precheck():
Moved code which is responsible for iterating through auxilary table
list and binding its elements with corresponding elements of main
table list, and properly updating locks in it to separate function -
multi_delete_set_locks_and_link_aux_tables(). This is because in order
to make multi-delete SP friendly we need to have all locks set properly
at the end of statement parsing. So we are introducing new function
which will be called from parser.
We also calculate number of tables from which we are going to perform
deletions there and store this number for later usage in
LEX::table_count.
Also removed some no longer needed code.
sql/sql_prepare.cc:
mysql_test_multidelete():
Now multi_delete_precheck() takes only two arguments, so we don't
need to pass fake third parameter.
sql/sql_yacc.yy:
delete:
In order to make multi-delete SP friendly we need to have all table
locks for the elements of main statement table list properly set
at the end of parsing.
- Added better error messages when trying to open a table that can't be discovered or unpacked. The most likely cause of this is that it does not have any frm data, probably since it has been created from NdbApi or is a NDB system table.
- Separated functionality that was in ha_create_table_from_engine into two functions. One that checks if the table exists and another one that tries to create the table from the engine.
mysql-test/r/ndb_autodiscover.result:
Add tests for reading from a table that can't be discovered(SYSTAB_0)
Discovery is not performed during create table anymore.
mysql-test/t/ndb_autodiscover.test:
Add tests for reading from a table that can't be discovered(SYSTAB_0)
Discovery is not performed during create table anymore.
ndb/test/ndbapi/create_tab.cpp:
Set connectstring before creating Ndb object.
sql/ha_ndbcluster.cc:
Rename and use the function ndbcluster_table_exists_in_engine.
Correct return valu from ndbcluster_discover
Remove old code "ndb_discover_tables"
sql/ha_ndbcluster.h:
Rename function ndbcluster_table_exists to ndb ndbcluster_table_exists_in_engine
sql/handler.cc:
Update comment of ha_create_table_from_engine
Remove parameter create_if_found from ha_create_table_from_engine, the function ha_table_exists_in_engine is now used toi check if table is found in engine.
Cleanup return codes from ha_create_table_from_engine.
Change name of ha_table_exists to ha_table_exists_in_engine, update comment and returne codes.
sql/handler.h:
Remove paramter create_if_cound from ha_create_table_from_engine
Rename ha_table_exists to ha_table_exists_in_engine
sql/sql_base.cc:
Use the function ha_table_exists_in_engine to detect if table exists in enegine.
If it exists, call function ha_create_table_from_engine to try and create it.
If create of table fails, set correct error message.
sql/sql_table.cc:
Add comments, remove parameter create_if_found to ha_create_table_from_engine.
When dropping a table, try to discover it from engine. If discover fails, use same error message as if the table didn't exists.
Maybe another message should be displayed here, ex: "Table could not be dropped, unpack failed"
When creating a new table, use ha_table_exists_in_engine to check if a table with the given name already exists.
into mysql.com:/home/dlenev/src/mysql-5.0-bg10015
sql/handler.cc:
Auto merged
sql/item_func.cc:
Auto merged
sql/sql_base.cc:
Auto merged
sql/sql_class.h:
Auto merged
sql/sql_parse.cc:
Auto merged
sql/sql_yacc.yy:
Auto merged
We should not allow explicit or implicit transaction commits inside
of stored functions or triggers (so in autocommit mode we should not
do commits after execution of sub-statement).
Also since we don't support nested statement transactions in 5.0,
we shouldn't commit or rollback stmt transactions while we are inside
stored functions or triggers. This should be fixed in later (>=5.1)
releases.
mysql-test/r/sp_trans.result:
Added test for bug #10015 "Crash in InnoDB if stored routines are used"
and for general transaction handling inside of functions.
mysql-test/t/sp_trans.test:
Added test for bug #10015 "Crash in InnoDB if stored routines are used"
and for general transaction handling inside of functions.
sql/handler.cc:
ha_trans_commit()/ha_trans_rollback():
Since we don't support nested statement transactions in 5.0,
we can't commit or rollback stmt transactions while we are inside
stored functions or triggers. So we simply do nothing now.
This should be fixed in later ( >= 5.1) releases.
sql/item_func.cc:
Item_func_sp::execute():
Set THD::transaction.in_sub_stmt flag to TRUE during stored function
execution to prevent commits and rollbacks for statement level
transactions, since doing them will ruin such transaction for
stateemtn which calls this function.
sql/share/errmsg.txt:
Added error message which says that statements doing explicit or implicit
commits are disallowed in triggers and stored functions.
sql/sql_base.cc:
close_thread_tables():
Clarified comment about committing of statement transactions in
prelocked mode.
sql/sql_class.h:
THD::transaction:
Added in_sub_stmt method which indicates that we are executing
statements from trigger or stored function now, and thus
statement transaction belongs to statement which invoked this
routine and we should not commit or rollback it while executing
these sub-statements.
sql/sql_parse.cc:
end_active_trans()/begin_trans()/end_trans():
We should not commit or rollback global (non-stmt) transaction
if we are executing stored function or trigger. These checks will
catch situation when we are trying to do commit or rollback in stored
procedure which is called from function or trigger.
sql/sql_trigger.h:
Table_triggers_list::process_triggers():
Set THD::transaction.in_sub_stmt flag to TRUE during trigger
execution to prevent commits and rollbacks for statement level
transactions, since doing them will ruin such transaction for
stateemtn which invokes this trigger.
sql/sql_yacc.yy:
Prohibited usage of statements which do explicit or implicit commit or
rollback inside of stored functions and triggers.
BitKeeper/etc/logging_ok:
auto-union
client/sql_string.cc:
Auto merged
configure.in:
Auto merged
include/my_global.h:
Auto merged
mysql-test/mysql-test-run.pl:
Auto merged
mysql-test/r/create.result:
Auto merged
mysql-test/r/olap.result:
Auto merged
mysql-test/r/warnings.result:
Auto merged
mysql-test/t/create.test:
Auto merged
mysql-test/t/warnings.test:
Auto merged
mysys/raid.cc:
Auto merged
scripts/make_binary_distribution.sh:
Auto merged
sql/field.cc:
Auto merged
BitKeeper/deleted/.del-ha_isam.cc~4dce65904db2675e:
Auto merged
BitKeeper/deleted/.del-ha_isammrg.cc~dc682e4755d77a2e:
Auto merged
sql/ha_berkeley.cc:
Auto merged
sql/ha_blackhole.cc:
Auto merged
sql/ha_heap.cc:
Auto merged
sql/ha_innodb.cc:
Auto merged
sql/ha_myisam.cc:
Auto merged
sql/ha_myisammrg.cc:
Auto merged
sql/ha_ndbcluster.cc:
Auto merged
sql/handler.cc:
Auto merged
sql/item.cc:
Auto merged
sql/item_cmpfunc.cc:
Auto merged
sql/item_geofunc.cc:
Auto merged
sql/item_strfunc.cc:
Auto merged
sql/item_subselect.cc:
Auto merged
sql/item_sum.cc:
Auto merged
sql/item_timefunc.cc:
Auto merged
sql/item_uniq.cc:
Auto merged
sql/lock.cc:
Auto merged
sql/log_event.cc:
Auto merged
sql/mysql_priv.h:
Auto merged
sql/opt_range.h:
Auto merged
sql/procedure.cc:
Auto merged
sql/protocol.cc:
Auto merged
sql/protocol_cursor.cc:
Auto merged
sql/set_var.cc:
Auto merged
sql/sql_acl.cc:
Auto merged
sql/sql_analyse.cc:
Auto merged
sql/sql_base.cc:
Auto merged
sql/sql_class.cc:
Auto merged
sql/sql_error.cc:
Auto merged
sql/sql_handler.cc:
Auto merged
sql/sql_insert.cc:
Auto merged
sql/sql_map.cc:
Auto merged
sql/sql_olap.cc:
Auto merged
sql/sql_repl.cc:
Auto merged
sql/sql_string.cc:
Auto merged
sql/sql_table.cc:
Auto merged
sql/sql_udf.cc:
Auto merged
sql/examples/ha_archive.cc:
Auto merged
sql/examples/ha_example.cc:
Auto merged
sql/examples/ha_tina.cc:
Auto merged
sql/sql_yacc.yy:
Auto merged
sql/tztime.cc:
Auto merged
strings/ctype-win1250ch.c:
Auto merged
mysql-test/r/func_gconcat.result:
merge & ensure that 4.1 and 5.0 source have tests in same order
mysql-test/r/innodb.result:
merge & ensure that 4.1 and 5.0 source have tests in same order
mysql-test/t/func_gconcat.test:
merge & ensure that 4.1 and 5.0 source have tests in same order
mysql-test/t/innodb.test:
merge & ensure that 4.1 and 5.0 source have tests in same order
sql/item_func.cc:
merge
sql/mysqld.cc:
merge
sql/opt_range.cc:
merge
sql/sql_parse.cc:
merge
Give better name to goto labels
sql/sql_select.cc:
merge
client/mysql.cc:
Auto merged
libmysql/libmysql.c:
Auto merged
sql/ha_ndbcluster.cc:
Auto merged
sql/item.cc:
Auto merged
sql/item.h:
Auto merged
sql/item_func.cc:
Auto merged
sql/item_subselect.cc:
Auto merged
sql/item_sum.cc:
Auto merged
sql/mysql_priv.h:
Auto merged
sql/opt_range.cc:
Auto merged
sql/sql_base.cc:
Auto merged
sql/sql_bitmap.h:
Auto merged
sql/sql_class.h:
Auto merged
sql/sql_insert.cc:
Auto merged
sql/sql_parse.cc:
Auto merged
sql/sql_select.cc:
Auto merged
Manual merge from 4.1.
mysql-test/r/create.result:
Auto merged
mysql-test/t/create.test:
Auto merged
sql/mysql_priv.h:
Auto merged
sql/sql_handler.cc:
Auto merged
sql/sql_insert.cc:
Auto merged
sql/sql_yacc.yy:
Auto merged
Hand merged from 4.0.
sql/lock.cc:
Auto merged
sql/mysql_priv.h:
Auto merged
sql/sql_acl.cc:
Auto merged
sql/sql_handler.cc:
Auto merged
sql/sql_table.cc:
Auto merged
1.) Added a new option to mysql_lock_tables() for ignoring FLUSH TABLES.
Used the new option in create_table_from_items().
It is necessary to prevent the SELECT table from being reopend.
It would get new storage assigned for its fields, while the
SELECT part of the command would still use the old (freed) storage.
2.) Protected the CREATE TABLE and CREATE TABLE ... SELECT commands
against a global read lock. This prevents a deadlock in
CREATE TABLE ... SELECT in conjunction with FLUSH TABLES WITH READ LOCK
and avoids the creation of new tables during a global read lock.
3.) Replaced set_protect_against_global_read_lock() and
unset_protect_against_global_read_lock() by
wait_if_global_read_lock() and start_waiting_global_read_lock()
in the INSERT DELAYED handling.
mysql-test/r/create.result:
Bug#10224 - ANALYZE TABLE crashing with simultaneous CREATE ... SELECT statement.
Added test results.
mysql-test/t/create.test:
Bug#10224 - ANALYZE TABLE crashing with simultaneous CREATE ... SELECT statement.
Added tests which do not require concurrency.
sql/lock.cc:
Bug#10224 - ANALYZE TABLE crashing with simultaneous CREATE ... SELECT statement.
Added a new option to mysql_lock_tables() for ignoring FLUSH TABLES.
Changed the parameter list.
Removed two unnecessary functions. Their functionality is included in
wait_if_global_read_lock() and start_waiting_global_read_lock().
sql/mysql_priv.h:
Bug#10224 - ANALYZE TABLE crashing with simultaneous CREATE ... SELECT statement.
Changed the declaration of mysql_lock_tables().
Added definitions for the new options.
sql/sql_acl.cc:
Bug#10224 - ANALYZE TABLE crashing with simultaneous CREATE ... SELECT statement.
Adjusted mysql_lock_tables() calls to the new argument list.
sql/sql_base.cc:
Bug#10224 - ANALYZE TABLE crashing with simultaneous CREATE ... SELECT statement.
Adjusted mysql_lock_tables() calls to the new argument list.
sql/sql_handler.cc:
Bug#10224 - ANALYZE TABLE crashing with simultaneous CREATE ... SELECT statement.
Adjusted mysql_lock_tables() calls to the new argument list.
sql/sql_insert.cc:
Bug#10224 - ANALYZE TABLE crashing with simultaneous CREATE ... SELECT statement.
Replaced set_protect_against_global_read_lock() and
unset_protect_against_global_read_lock() by
wait_if_global_read_lock() and start_waiting_global_read_lock()
in the INSERT DELAYED handling.
Adjusted mysql_lock_tables() calls to the new argument list.
sql/sql_parse.cc:
Bug#10224 - ANALYZE TABLE crashing with simultaneous CREATE ... SELECT statement.
Protected the CREATE TABLE and CREATE TABLE ... SELECT commands
against a global read lock. This prevents a deadlock in
CREATE TABLE ... SELECT in conjunction with FLUSH TABLES WITH READ LOCK
and avoids the creation of new tables during a global read lock.
sql/sql_table.cc:
Bug#10224 - ANALYZE TABLE crashing with simultaneous CREATE ... SELECT statement.
Adjusted mysql_lock_tables() calls to the new argument list.
Used the new option in create_table_from_items().
into mysql.com:/opt/local/work/mysql-5.0-7306-new
sql/item_subselect.cc:
Auto merged
sql/mysql_priv.h:
Auto merged
sql/opt_range.cc:
Auto merged
sql/sql_base.cc:
Auto merged
sql/sql_insert.cc:
Auto merged
sql/sql_lex.cc:
Auto merged
sql/sql_lex.h:
Auto merged
sql/sql_olap.cc:
Auto merged
sql/sql_parse.cc:
Auto merged
sql/sql_select.cc:
Auto merged
"the server side preparedStatement error for LIMIT placeholder",
which moves all uses of LIMIT clause from PREPARE to OPTIMIZE
and later steps.
After-review fixes.
mysql-test/r/group_min_max.result:
Test results fixed for EXPLAINs when using GROUP_MIN_MAX access plan.
sql/item_subselect.cc:
Move setting of the internal LIMIT used for IN/ALL/ANY/EXISTS
subqueries to one place: Item_exists_subselect::fix_length_and_dec().
This implies that unit->select_limit_cnt is not set until the item is
fixed. This is OK, as now LIMIT values are not used until JOIN::optimize.
sql/mysql_priv.h:
setup_tables no longer needs a special flag for the case when
it's called from JOIN::reinit() (we don't need to call setup_tables
between two executions of a correlated subquery).
sql/opt_range.cc:
Fix a glitch in GROUP_MIN_MAX access plan: we should use table metadata,
not field data, to evaluate max_used_key_length, which is then
used for explain.
sql/sp.cc:
- setup_tables signature changed.
sql/sql_base.cc:
- setup_tables no longer needs a special mode for subqueries.
Unused checks were removed.
sql/sql_delete.cc:
- setup_tables signature changed
sql/sql_help.cc:
- setup_tables signature changed
sql/sql_insert.cc:
- setup_tables signature changed
sql/sql_lex.cc:
Consolidate setting of internal LIMIT for IN/ALL/ANY/EXISTS subqeries
in one place, and hence remove it from st_select_lex::test_limit().
sql/sql_lex.h:
Cleanup signature of st_select_lex_unit::init_prepare_fake_select_lex().
sql/sql_load.cc:
- setup_tables signature changed
sql/sql_olap.cc:
- setup_tables signature changed
sql/sql_parse.cc:
- st_select_lex_unit::set_limit() signature changed
sql/sql_select.cc:
Move setting of JOIN::select_limit from JOIN::prepare
to JOIN::optimize. At prepare, limit is unknown yet.
Remove excessive cleanups from JOIN::reinit which were overwriting
join->join_tab[i]->table->used_keys. This fixes the bug which was triggered
by the change in item_subselect.cc.
sql/sql_union.cc:
Class st_select_lex_unit was changed to avoid calls to
st_select_lex_unit::set_limit from places where it may be unknown.
Now unit->select_limit_cnt is set at ::exec().
st_select_lex_unit::init_prepare_fake_select_lex():
- move out set_limit functionality
- remove a few lines of dead code.
st_select_lex_unit::prepare():
- now we don't call set_limit at the time of prepare, so the value
of unit->select_limit_cnt may be unknown here. Use sl->select_limit
instead.
st_select_lex_unit::exec():
- cleanup
- call set_limit explicitly as it has been moved out of
init_prepare_fake_select_lex.
sql/sql_update.cc:
- setup_tables signature changed
Added ASSERT() to detect wrongly packed fields
sql/field.h:
Fixed comments to right format
sql/opt_range.cc:
Merged code
sql/sql_base.cc:
Fixed indentation
sql/sql_insert.cc:
Fixed comments to right format
sql/sql_select.cc:
Simplify code
sql/unireg.cc:
Simply code for calculating key_buff_length
Added ASSERT() to detect wrongly packed fields
sql/item.cc:
Auto merged
sql/item.h:
Auto merged
sql/mysql_priv.h:
Auto merged
sql/sql_base.cc:
Auto merged
sql/sql_delete.cc:
Auto merged
sql/sql_insert.cc:
Manual merge
sql/sql_update.cc:
Manual merge
#5860 "Multi-table UPDATE does not activate update triggers"
#6812 "Triggers are not activated for INSERT ... SELECT"
#8755 "Trigger is not activated by LOAD DATA".
This patch also implements proper handling of triggers for special forms
of insert like REPLACE or INSERT ... ON DUPLICATE KEY UPDATE.
Also now we don't call after trigger in case when we have failed to
inserted/update or delete row. Trigger failure should stop statement
execution.
I have not properly tested handling of errors which happen inside of
triggers in this patch, since it is simplier to do this once we will be
able to access tables from triggers.
mysql-test/r/trigger.result:
Added tests for triggers behavior for various non-standard forms of
INSERT such as REPLACE and INSERT ... ON DUPLICATE KEY UPDATE.
Also added tests for bugs #5860 "Multi-table UPDATE does not activate
update triggers", #6812 "Triggers are not activated for INSERT ... SELECT"
and #8755 "Trigger is not activated by LOAD DATA".
mysql-test/t/trigger.test:
Added tests for triggers behavior for various non-standard forms of
INSERT such as REPLACE and INSERT ... ON DUPLICATE KEY UPDATE.
Also added tests for bugs #5860 "Multi-table UPDATE does not activate
update triggers", #6812 "Triggers are not activated for INSERT ... SELECT"
and #8755 "Trigger is not activated by LOAD DATA".
sql/item.cc:
Since it turned out that at trigger loading time we can't say in which
buffer TABLE::record[0] or record[1] old version of row will be stored
we have to change our approach to binding of Item_trigger_field to
Field instances.
Now after trigger parsing (in Item_trigger_field::setup_table()) we only
find index of proper Field in the TABLE::field array. Then before trigger
is invoked we set Table_triggers_list::old_field/new_field so they point
to arrays holding Field instances bound to buffers with proper row
versions. And as last step in Item_trigger_field::fix_fields() we get
pointer to Field from those arrays using saved field index.
Item_trigger_field::setup_field()/fix_fields() were changed to implement
this approach.
sql/item.h:
Since it turned out that at trigger loading time we can't say in which
buffer TABLE::record[0] or record[1] old version of row will be stored
we have to change our approach to binding of Item_trigger_field to
Field instances.
Now after trigger parsing (in Item_trigger_field::setup_table()) we only
find index of proper Field in the TABLE::field array. Then before trigger
is invoked we set Table_triggers_list::old_field/new_field so they point
to arrays holding Field instances bound to buffers with proper row
versions. And as last step in Item_trigger_field::fix_fields() we get
pointer to Field from those arrays using saved field index.
Item_trigger_field:
- Added field_idx member to store index of Field object corresponding to
this Item in TABLE::field array.
- Added triggers member to be able to access to parent Table_trigger_list
object from fix_fields() method.
- setup_field() no longer needs to know for which type of event this
trigger is, since it does not make decision Field for which buffer
(record[0] or record[1] is appropriate for this Item_trigger_field)
sql/mysql_priv.h:
Added fill_record_n_invoke_before_triggers() methods. They are simple
wrappers around fill_record() which invoke proper before trigger right
after filling record with values.
sql/sql_base.cc:
Added fill_record_n_invoke_before_triggers() methods. They are simple
wrappers around fill_record() which invoke proper before trigger right
after filling record with values.
sql/sql_delete.cc:
mysql_delete():
Now we stop statement execution if one of triggers failed, we also
don't execute after delete trigger if we failed to delete row from
the table (We also pass information about which buffer contains old
version of row to process_triggers()).
multi_delete::send_data()/do_deletes():
Now we also invoke triggers in case of multi-delete.
sql/sql_insert.cc:
mysql_insert():
Moved invocation of before triggers to fill_record_n_invoke_before_triggers()
method. After triggers are now executed as part of write_record().
(as nice side effect now we also stop statement execution if one of
triggers fail).
write_record():
Invoke after insert trigger after performing insert. Also invoke proper
triggers if insert is converted to update or conflicting row is deleted.
Cleaned up error handling a bit - no sense to report error via
handler::print_error if it was not generated by handler method and
was reported before.
Also now we will execute after trigger only if we really have written
row to the table.
select_insert::send_data()/store_values():
We should also execute INSERT triggers for INSERT ... SELECT statement.
sql/sql_load.cc:
read_fixed_length()/read_sep_field():
We should execute INSERT triggers when processing LOAD DATA statement.
Small cleanup in auto-increment related code. Also moved check for
thd->killed which is used to abort LOAD DATA in case of problems
in 'traditional' mode to better place..
sql/sql_trigger.cc:
Since it turned out that at trigger loading time we can't say in which
buffer TABLE::record[0] or record[1] old version of row will be stored
we have to change our approach to binding of Item_trigger_field to
Field instances.
Now after trigger parsing (in Item_trigger_field::setup_table()) we only
find index of proper Field in the TABLE::field array. Then before trigger
is invoked we set Table_triggers_list::old_field/new_field so they point
to arrays holding Field instances bound to buffers with proper row
versions. And as last step in Item_trigger_field::fix_fields() we get
pointer to Field from those arrays using saved field index.
Table_triggers_list methods were changed to implement this approach
(see also comments for sql_trigger.h).
sql/sql_trigger.h:
Since it turned out that at trigger loading time we can't say in which
buffer TABLE::record[0] or record[1] old version of row will be stored
we have to change our approach to binding of Item_trigger_field to
Field instances.
Now after trigger parsing (in Item_trigger_field::setup_table()) we only
find index of proper Field in the TABLE::field array. Then before trigger
is invoked we set Table_triggers_list::old_field/new_field so they point
to arrays holding Field instances bound to buffers with proper row
versions. And as last step in Item_trigger_field::fix_fields() we get
pointer to Field from those arrays using saved field index.
Changed Table_triggers_list to implement this new approach:
- Added record1_field member to store array of Field objects bound
to TABLE::record[1] buffer (instead of existing old_field member)
- Added new_field member and changed meaning of old_field member.
During trigger execution they should point to arrays of Field objects
bound to buffers holding new and old versions of row respectively.
- Added 'table' member to be able to get access to TABLE instance
(for which this trigger list object was created) from process_triggers()
method.
- Now process_triggers() method sets old_field and new_field members
properly before executing triggers body (basing on new
old_row_is_record1 parameter value).
- Renamed prepare_old_row_accessors_method() to prepare_record1_accessors()
Also added has_before_update_triggers() method which allows to check
whenever any before update triggers exist for table.
sql/sql_update.cc:
mysql_update():
Now we invoke before triggers in fill_record_n_invoke_before_triggers()
method. Also now we abort statement execution when one of triggers fail.
safe_update_on_fly():
When we are trying to understand if we can update first table in multi
update on the fly we should take into account that BEFORE UPDATE
trigger can change field values.
multi_update::send_data()/do_updates()
We should execute proper triggers when doing multi-update
(in both cases when we do it on the fly and using temporary tables).
client/mysql.cc:
Remove usage of c_ptr_safe() as this causes a linkage problem when compiling MySQL without inline functions
sql/sql_base.cc:
Don't use c_ptr_safe() on this string as this causes a realloc and the String object (allocated by sql_yacc.yy) is never freed
configure.in:
Auto merged
include/mysql.h:
Auto merged
innobase/row/row0mysql.c:
Auto merged
BitKeeper/deleted/.del-ctype-cp932.c:
Auto merged
BitKeeper/deleted/.del-errmsg.txt~4617575065d612b9:
Auto merged
BitKeeper/deleted/.del-errmsg.txt~ffe4a0c9e3206150:
Auto merged
libmysql/libmysql.c:
Auto merged
libmysqld/Makefile.am:
Auto merged
mysql-test/r/ctype_ucs.result:
Auto merged
mysql-test/t/ctype_ucs.test:
Auto merged
mysql-test/t/ps_grant.test:
Auto merged
sql/ha_blackhole.cc:
Auto merged
strings/ctype-big5.c:
Auto merged
strings/ctype-ucs2.c:
Auto merged
bug#10175 - blackhole.test hangs with "Warning: prev link 1 didn't point at previous lock at read: read lock with no write locks"
sql/sql_base.cc
libmysqld/examples/mysql.cc linking problem
sql/ha_blackhole.cc:
bug#10175 - blackhole.test hangs with "Warning: prev link 1 didn't point at previous lock at read: read lock with no write locks"
sql/sql_base.cc:
libmysqld/examples/mysql.cc linking problem
sql/sql_base.cc:
Auto merged
sql/sql_insert.cc:
Auto merged
sql/sql_parse.cc:
Auto merged
sql/sql_prepare.cc:
Auto merged
sql/sql_select.cc:
Auto merged
sql/sql_view.cc:
Auto merged
sql/table.cc:
Auto merged
sql/table.h:
Auto merged
Fixed bug #8528.
Representation for single-table views was made similar to
representation for multi-table views.
view.test:
Added test case for bug #8528.
view.result:
Added test case for bug #8528. Fixed other test cases.
mysql-test/r/view.result:
Added test case for bug #8528. Fixed other test cases.
mysql-test/t/view.test:
Added test case for bug #8528.
sql/sql_base.cc:
Fixed bug #8528.
Representation for single-table views was made similar to
representation for multi-table views.
sql/sql_delete.cc:
Fixed bug #8528.
Representation for single-table views was made similar to
representation for multi-table views.
sql/sql_insert.cc:
Fixed bug #8528.
Representation for single-table views was made similar to
representation for multi-table views.
sql/sql_parse.cc:
Fixed bug #8528.
Representation for single-table views was made similar to
representation for multi-table views.
sql/sql_prepare.cc:
Fixed bug #8528.
Representation for single-table views was made similar to
representation for multi-table views.
sql/sql_select.cc:
Fixed bug #8528.
Representation for single-table views was made similar to
representation for multi-table views.
sql/sql_update.cc:
Fixed bug #8528.
Representation for single-table views was made similar to
representation for multi-table views.
sql/sql_view.cc:
Fixed bug #8528.
Representation for single-table views was made similar to
representation for multi-table views.
sql/table.cc:
Fixed bug #8528.
Representation for single-table views was made similar to
representation for multi-table views.
sql/table.h:
Fixed bug #8528.
Representation for single-table views was made similar to
representation for multi-table views.
MySQL server 100% CPU if FLUSH TABLES WITH READ LOCK + INSERT
Infinite loop caused by missing update to thd version.
sql/sql_base.cc:
Bug#6616
thd version needs to be updated before reopening tables
to prevent an infinite loop.
BitKeeper/etc/logging_ok:
Logging to logging@openlogging.org accepted
mysql-test/r/gis-rtree.result:
test result fixed
mysql-test/r/gis.result:
test result fixed
mysql-test/t/gis-rtree.test:
test case fixed
mysql-test/t/gis.test:
test case added
sql/field.cc:
error messages launched now when we try to put bad spatial
data in the GEOMETRY field
sql/field.h:
interface fixed
sql/item_geofunc.cc:
bad_data sign now instead of NULL now returned from
Item_geometry_from_text::val_str
sql/share/errmsg.txt:
error message added
sql/spatial.cc:
bad_geometry data instance
sql/spatial.h:
bad_geometry_data declaration
sql/sql_base.cc:
messages now created in store_* function
(BUG#10041)
sql/item.cc:
depended_from shoudl be cleaned
layout fixed
function to mark range of SELECTs as dependent (used if item was resolved with PS cache of resolving identifiers)
sql/item.h:
function to mark range of SELECTs as dependent (used if item was resolved with PS cache of resolving identifiers)
sql/item_subselect.h:
function to mark range of SELECTs as dependent (used if item was resolved with PS cache of resolving identifiers)
sql/sql_base.cc:
if outer refernce (identifier) was resolved with help of cache all subqueries and resolved item itseld have to be correctly marked as dependent
Added a test in connection with the fix for
bug #6106.
view.result, view.test:
Added test cases for bugs #6106/6107.
sql_show.cc:
The addition of the case for items of the type REF_ITEM in the
function uses_only_table_name_fields became necessary after
the fix for bug #6106.
sql_base.cc:
The problem was due to the fact that two different column
references were glued together though one of them belonged to
a subquery while another to an outer query. This caused
eventually a wrong calculation of values for the used_tables
attribute.
sql/sql_base.cc:
The problem was due to the fact that two different column
references were glued together though one of them belonged to
a subquery while another to an outer query. This caused
eventually a wrong calculation of values for the used_tables
attribute.
sql/sql_show.cc:
The addition of the case for items of the type REF_ITEM in the
function uses_only_table_name_fields became necessary after
the fix for bug #6106.
mysql-test/t/view.test:
Added test cases for bugs #6106/6107.
mysql-test/r/view.result:
Added test cases for bugs #6106/6107.
mysql-test/t/information_schema.test:
Added a test in connection with the fix for
bug #6106.
mysql-test/r/information_schema.result:
Added a test in connection with the fix for
bug #6106.
sql/field.cc:
Auto merged
sql/mysql_priv.h:
Auto merged
sql/mysqld.cc:
Auto merged
sql/sql_base.cc:
Auto merged
sql/sql_class.cc:
Auto merged
sql/sql_class.h:
Auto merged
sql/sql_lex.h:
Auto merged
sql/sql_parse.cc:
Auto merged
sql/handler.cc:
SCCS merged
fix a race condition in TC_LOG_BINLOG::unlog
include/Makefile.am:
remove the rest of isam/merge references
include/config-win.h:
unused and abused macro removed
include/my_pthread.h:
unused and abused macro removed
include/my_sys.h:
MY_IGNORE_BADFD flag
include/mysql_embed.h:
remove the rest of isam/merge references
mysql-test/r/replace.result:
remove the rest of isam/merge references
mysql-test/t/replace.test:
remove the rest of isam/merge references
mysql-test/t/xa.test:
comment
mysys/my_sync.c:
MY_IGNORE_BADFD flag
sql/handler.cc:
remove the rest of isam/merge references
sql/log.cc:
fix a race condition in TC_LOG_BINLOG::unlog
preparation for binlog group commit
sql/mysql_priv.h:
remove duplicates
sql/mysqld.cc:
remove the rest of isam/merge references
sql/opt_range.cc:
remove the rest of isam/merge references
sql/set_var.cc:
hide unused variables. simplify sync_binlog code
sql/sql_base.cc:
remove the rest of isam/merge references
sql/sql_class.h:
cleanup
client/mysqldump.c:
Changed some function and variable names to MySQL syntax
Fixed indentation for last few pushes
(No logic changes)
mysql-test/r/strict.result:
Test for bug #5907 (Traditional mode: invalid value can be inserted via a stored procedure)
mysql-test/t/strict.test:
Test for bug #5907 (Traditional mode: invalid value can be inserted via a stored procedure)
sql/sql_base.cc:
More comments
sql/sql_error.cc:
Ensure that PS gives error for invalid values in 'strict' mode
- fixed bug in join view processing
- postreview fixes (BUG#9398 & BUG#8703)
sql/sql_base.cc:
used original TABLE object to get correct name of table and db
sql/sql_view.cc:
fixed bug of assigning select_lex for join view
sql/table.cc:
comment fixed
stack overflow check added
new method for underlying base table finding
sql/table.h:
comment fixed
new method for underlying base table finding
(BUG##9398, BUG#8703)
fixed wrong join view detection in multi-delete which lead to server crash
mysql-test/r/lowercase_view.result:
added new tests of updation and selection from the same table
mysql-test/r/view.result:
added new tests of updation and selection from the same table
added test of multidelete command over join view which lead to server crash
test suite from bugs #9398 and #8703
mysql-test/t/lowercase_view.test:
added new tests of updation and selection from the same table
mysql-test/t/view.test:
added new tests of updation and selection from the same table
added test of multidelete command over join view which lead to server crash
test suite from bugs #9398 and #8703
sql/sql_base.cc:
changed procedure of finding tables
sql/sql_class.cc:
added derived table procession detection
sql/sql_class.h:
added derived table procession detection
sql/sql_delete.cc:
fixed detection of selection from table which update for multidelete
sql/sql_derived.cc:
added derived table procession detection
sql/sql_lex.cc:
added detection os SELECTs processed inside derived tables
removed old mechanism of multidelete/multiupdate table duplication detection (which can't work with views)
sql/sql_lex.h:
added detection os SELECTs processed inside derived tables
removed old mechanism of multidelete/multiupdate table duplication detection (which can't work with views)
sql/sql_parse.cc:
removed wrong test of join view (for multidelete in can be not only first table)
sql/sql_prepare.cc:
added detection os SELECTs processed inside derived tables (reset it for reusing in PS/SP)
sql/sql_select.cc:
added detection os SELECTs processed inside derived tables
sql/sql_update.cc:
fixed detection of selection from table which update for multiupdate
mysql-test/r/mysqldump.result:
Auto merged
mysql-test/r/sp.result:
Auto merged
mysql-test/t/mysqldump.test:
Auto merged
mysql-test/t/sp.test:
Auto merged
sql/item_func.cc:
Auto merged
sql/mysql_priv.h:
Auto merged
sql/sp.cc:
Auto merged
sql/sp_rcontext.cc:
Auto merged
sql/sql_acl.cc:
Auto merged
sql/sql_base.cc:
Auto merged
sql/sql_class.h:
Auto merged
sql/sql_lex.cc:
Auto merged
sql/sql_lex.h:
Auto merged
sql/sql_prepare.cc:
Auto merged
sql/sql_update.cc:
Auto merged
sql/sql_view.cc:
Auto merged
sql/table.h:
Auto merged
sql/sp_head.cc:
Manual merge.
sql/sql_class.cc:
Manual merge.
sql/sql_parse.cc:
Manual merge.
sql/sql_yacc.yy:
Manual merge.
and some SP-related cleanups.
- We don't have separate stage for calculation of list of tables
to be prelocked and doing implicit LOCK/UNLOCK any more.
Instead we calculate this list at open_tables() and do implicit
LOCK in lock_tables() (and UNLOCK in close_thread_tables()).
Also now we support cases when same table (with same alias) is
used several times in the same query in SP.
- Cleaned up execution of SP. Moved all common code which handles
LEX and does preparations before statement execution or complex
expression evaluation to auxilary sp_lex_keeper class. Now
all statements in SP (and corresponding instructions) that
evaluate expression which can contain subquery have their
own LEX.
mysql-test/r/lock.result:
Replaced wrong error code with the correct one after fixing bug in
SP-locking.
mysql-test/r/mysqldump.result:
Added dropping of view which is used in test to its beginning.
mysql-test/r/sp.result:
Added tests for improved SP-locking.
Temporarily disabled tests for SHOW PROCEDURE STATUS and alike
(Until Monty will allow to open mysql.proc under LOCK TABLES without
mentioning it in lock list).
Replaced wrong results of test for bug #5240 with correct results after
fixing bug in handling of cursors.
mysql-test/t/lock.test:
Replaced wrong error code with the correct one after fixing bug in
SP-locking.
mysql-test/t/mysqldump.test:
Added dropping of view which is used in test to its beginning.
mysql-test/t/sp.test:
Added tests for improved SP-locking.
Temporarily disabled tests for SHOW PROCEDURE STATUS and alike
(Until Monty will allow to open mysql.proc under LOCK TABLES without
mentioning it in lock list).
Removed test for bug #1654 since we already test exactly this function
in one of SP-locking tests.
Removed comment about cursor's wrong behavior in test for bug #5240
after fixing bug which was its cause.
sql/item_func.cc:
Removed comment which is no longer true.
sql/mysql_priv.h:
Changed open_tables() signature.
Now its 2nd parameter is in/out since it can add elements to table list.
sql/sp.cc:
sp_find_procedure():
Added one more parameter which enforces cache only lookup.
sp_merge_hash():
Now uses its return value to indicate that first of two hashes changed
as result of merge.
sp_cache_routines():
This function caches all stored routines used in query now.
sql/sp.h:
- sp_find_procedure() now has one more parameter which enforces cache only
lookup.
- sp_merge_hash() now uses its return value to indicate that first of two
hashes changed as result of merge.
- sp_cache_routines() caches all stored routines now. So it does not need
third argument any more.
sql/sp_head.cc:
sp_head::sp_head():
Added initialization of new m_spfuns and m_spprocs members.
sp_head::execute():
Let us save/restore part of thread context which can be damaged by
execution of instructions.
sp_head::execute_function()/execute_procedure():
Now it is responsibility of caller to close tables used in
subqueries which are passed as routine parameters.
sp_head::restore_lex():
Let us accumulate information about routines used by this one
in new m_spfuns, m_spprocs hashes.
sp_lex_keeper::reset_lex_and_exec_core()
Main method of new auxilary sp_lex_keeper class to which instructions
delegate responsibility for handling LEX and preparations before
executing statement or calculating complex expression.
Since all instructions which calculate complex expression or execute
command now use sp_lex_keeper they have to implement
sp_instr::exec_core() method. Most of instruction specific logic
has moved from sp_instr::execute() to this new method.
Removed sp_instr_set_user_var class which is no longer used, because
nowdays we allow execution of statements in stored functions and
triggers.
sp_merge_table_list() became sp_head::merge_table_list() method. It
also treats sp_head::m_sptabs as multi-set of tables now.
sp_hash_to_table_list() became sp_head::add_used_tables_to_table_list().
It takes into account that sp_head::m_sptabs is multi-set and allocates
object into persistent arena of PS.
Removed sp_merge_table_hash(), sp_open_and_lock_tables(),
sp_unlock_tables(), sp_merge_routine_tables() methods since they are not
used by new prelocking mechanism.
Added sp_add_sp_tables_to_table_list() which serves for adding tables needed
by routines used in query to the query table list for prelocking.
sql/sp_head.h:
class sp_head:
- Added m_spfuns, m_spprocs members for storing names of routines used
by this routine.
- Added add_used_tables_to_table_list() method which allows to add
tables needed by this routine to query's table list.
- Converted sp_merge_table_list() to sp_head::merge_table_list() method.
- Changed semantics of THD::m_sptabs. Now it is multi-set which contains
only tables which are used by this routine and not routines that are
called from this one.
Removed sp_merge_routine_tables(), sp_merge_table_hash(),
sp_open_and_lock_tables(), sp_unlock_tables() calls since they are not
used for our prelocking list calculation.
Added auxilary sp_lex_keeper class to which instructions delegate
responsibility for handling LEX and preparations before executing
statement or calculating complex expression. This class uses
new sp_instr::exec_core() method which is responsible for executing
instruction's core function after all preparations were made.
All instructions which hold and calculate complex expression now have
their own LEX (by aggregating sp_lex_keeper instance). sp_instr_stmt
now uses sp_lex_keeper too.
Removed sp_instr_set_user_var class which is no longer used, because
nowdays we allow execution of statements in stored functions and
triggers.
sql/sp_rcontext.cc:
Now sp_cursor holds pointer to sp_lex_keeper instead of LEX.
sql/sp_rcontext.h:
Now sp_cursor holds pointer to sp_lex_keeper instead of LEX.
sql/sql_acl.cc:
acl_init(), grant_init():
Now we use simple_open_n_lock_tables() instead of explicit
calls to open_tables() and mysql_lock_tables().
sql/sql_base.cc:
Implemented support for execution of statements in "prelocked" mode.
When we have statement which uses stored routines explicitly or
implicitly (via views or triggers) we have to open and lock all tables
for these routines at the same time as tables for the main statement.
In fact we have to do implicit LOCK TABLES at the begining of such
statement and implict UNLOCK TABLES at its end. We call such mode
"prelocked".
When open_tables() is called for the statement tables which are needed
for execution of routines used by it are added to its tables list
(this process also caches all routines used). Implicit use of routines
is discovered when we open view or table with trigger and apropriate
tables are added to the table list at this moment. Statement which has
such extra tables in its list (well actually any that uses functions)
is marked as requiring prelocked mode for its execution.
When lock_tables() sees such statement it will issue implicit LOCK TABLES
for this extended table list instead of doing usual locking, it will also
set THD::prelocked_mode to indicate that we are in prelocked mode.
When open_tables()/lock_tables() are called for statement of stored
routine (substatement), they notice that we are running in prelocked mode
and use one of prelocked tables from those that are not used by upper
levels of execution.
close_thread_tables() for substatement won't really close tables used
but will mark them as free for reuse instead.
Finally when close_thread_tables() is called for the main statement it
really unlocks and closes all tables used.
Everything will work even if one uses such statement under real LOCK
TABLES (we are simply not doing implicit LOCK/UNLOCK in this case).
sql/sql_class.cc:
Added initialization of THD::prelocked_mode member.
sql/sql_class.h:
- Added prelocked_mode_type enum and THD::prelocked_mode member
which are used for indication whenever "prelocked mode" is on
(i.e. that statement uses stored routines and is executed under
implicit LOCK TABLES).
- Removed THD::shortcut_make_view which is no longer needed.
We use TABLE_LIST::prelocking_placeholder for the same purprose
now.
sql/sql_handler.cc:
Changed open_tables() invocation.
Now its 2nd parameter is in/out since it can add elements to table list.
sql/sql_lex.cc:
lex_start():
Added initialization of LEX::query_tables_own_last.
Unused LEX::sptabs member was removed.
st_lex::unlink_first_table()/link_first_table_back():
We should update LEX::query_tables_last properly if table list
contains(ed) only one element.
sql/sql_lex.h:
LEX:
- Removed sptabs member since it is no longer used.
- Added query_tables_own_last member, which if non-0 indicates that
statement requires prelocking (implicit LOCK TABLES) for its execution
and points to last own element in query table list. If it is zero
then this query does not need prelocking.
- Added requires_prelocking(), mark_as_requiring_prelocking(),
first_not_own_table() inline methods to incapsulate and simplify
usage of this new member.
sql/sql_parse.cc:
dispatch_command():
To properly leave prelocked mode when needed we should call
close_thread_tables() even if there are no open tables.
mysql_execute_command():
- Removed part of function which were responsible for doing implicit
LOCK TABLES before statement execution if statement used stored
routines (and doing UNLOCK TABLES at the end).
Now we do all this in open_tables()/lock_tables()/close_thread_tables()
instead.
- It is also sensible to reset errors before execution of statement
which uses routines.
- SQLCOM_DO, SQLCOM_SET_OPTION, SQLCOM_CALL
We should always try to open tables because even if statement has empty
table list, it can call routines using tables, which should be preopened
before statement execution.
- SQLCOM_CALL
We should not look up routine called in mysql.proc, since it should be
already cached by this moment by open_tables() call.
- SQLCOM_LOCK_TABLES
it is better to use simple_open_n_lock_tables() since we want to avoid
materialization of derived tables for this command.
sql/sql_prepare.cc:
mysql_test_update():
Changed open_tables() invocations. Now its 2nd parameter is in/out
since it can add elements to table list.
check_prepared_statement():
Since now we cache all routines used by statement in open_tables() we
don't need to do it explicitly.
mysql_stmt_prepare():
Now we should call close_thread_tables() when THD::lex points to the
LEX of statement which opened tables.
reset_stmt_for_execute():
Commented why we are resetting all tables in table list.
sql/sql_trigger.h:
Table_triggers_list::process_triggers():
We should surpress sending of ok packet when we are calling trigger's
routine, since now we allow statements in them.
sql/sql_update.cc:
Changed open_tables() invocations.
Now its 2nd parameter is in/out since it can add elements to table list.
sql/sql_view.cc:
mysql_make_view():
- Removed handling of routines used in view. Instead we add tables which
are needed for their execution to statement's table list in
open_tables().
- Now we use TABLE_LIST::prelocking_placeholder instead of
THD::shortcut_make_view for indicating that view is opened
only to discover which tables and routines it uses (this happens
when we build extended table list for prelocking). Also now we try
to avoid to modify main LEX in this case (except of its table list).
- Corrected small error we added tables to the table list of the main
LEX without updating its query_tables_last member properly.
sql/sql_yacc.yy:
Now each expression which is used in SP statements and can contain
subquery has its own LEX. This LEX is stored in corresponding sp_instr
object and used along with Item tree for expression calculation.
We don't need sp_instr_set_user_var() anymore since now we allow
execution of statements in stored functions and triggers.
sql/table.h:
Added TABLE_LIST::prelocking_placeholder member for distinguishing
elements of table list which does not belong to the statement itself
and added there only for prelocking (as they are to be used by routines
called by this statement).
sql/tztime.cc:
my_tz_init():
Now we use more simplier simple_open_n_lock_tables() call instead of
open_tables()/lock_tables() pair.
