into olga.mysql.com:/home/igor/dev-opt/mysql-5.0-opt-bug27229
sql/item.cc:
Auto merged
sql/item_sum.cc:
Auto merged
sql/sql_base.cc:
Auto merged
sql/sql_select.cc:
Auto merged
context was used as an argument of GROUP_CONCAT.
Ensured correct setting of the depended_from field in references
generated for set functions aggregated in outer selects.
A wrong value of this field resulted in wrong maps returned by
used_tables() for these references.
Made sure that a temporary table field is added for any set function
aggregated in outer context when creation of a temporary table is
needed to execute the inner subquery.
mysql-test/r/subselect.result:
Added a test case for bug #27229.
mysql-test/t/subselect.test:
Added a test case for bug #27229.
sql/item.cc:
Fixed bug #27229: crash when a set function aggregated in outer
context was used as an argument of GROUP_CONCAT.
Ensured correct setting of the depended_from field in references
generated for set functions aggregated in outer selects.
sql/item_sum.cc:
Fixed bug #27229: crash when a set function aggregated in outer
context was used as an argument of GROUP_CONCAT.
Added the field aggr_sel to the objects of the class Item_sum.
In any Item_sum object created for a set function this field
has to contain a pointer to the select where the set function
is aggregated.
sql/item_sum.h:
Fixed bug #27229: crash when a set function aggregated in outer
context was used as an argument of GROUP_CONCAT.
Added the field aggr_sel to the objects of the class Item_sum.
In any Item_sum object created for a set function this field
has to contain a pointer to the select where the set function
is aggregated.
Added a method that says whether a set function is aggregated
in outer context and, if so, returns the aggregating select.
Removed the field nest_level_tables_count introduced by the
patch for bug 24484 as aggr_sel->join->tables contains the
sane number.
sql/sql_base.cc:
Fixed bug #27229: crash when a set function aggregated in outer
context was used as an argument of GROUP_CONCAT.
Added the field aggr_sel to the objects of the class Item_sum.
Removed changes introduced by the patch for bug 24484 as
the field leaf_count of the THD class is not used anymore.
sql/sql_class.h:
Fixed bug #27229: crash when a set function aggregated in outer
context was used as an argument of GROUP_CONCAT.
Added the field aggr_sel to the objects of the class Item_sum.
Removed changes introduce by the patch for bug 24484 as
the field leaf_count of the THD class is not used anymore.
sql/sql_insert.cc:
Fixed bug #27229: crash when a set function aggregated in outer
context was used as an argument of GROUP_CONCAT.
Added the field aggr_sel to the objects of the class Item_sum.
Removed changes introduce by the patch for bug 24484 as
the field leaf_count of the THD class is not used anymore.
sql/sql_select.cc:
Fixed bug #27229: crash when a set function aggregated in outer
context was used as an argument of GROUP_CONCAT.
When creating a temporary table a field is added in it for any
set function aggregated in outer context.
context was used as an argument of GROUP_CONCAT.
Ensured correct setting of the depended_from field in references
generated for set functions aggregated in outer selects.
A wrong value of this field resulted in wrong maps returned by
used_tables() for these references.
Made sure that a temporary table field is added for any set function
aggregated in outer context when creation of a temporary table is
needed to execute the inner subquery.
into gbichot3.local:/home/mysql_src/mysql-5.1-rpl-26194
will fix by hand
mysql-test/t/rpl_misc_functions.test:
Auto merged
sql/lock.cc:
Auto merged
sql/mysqld.cc:
Auto merged
sql/sql_base.cc:
Auto merged
sql/sql_derived.cc:
Auto merged
sql/sql_select.cc:
will fix by hand
sql/table.h:
merge from 5.0
what it actually means (Monty approved the renaming)
- correcting description of transaction_alloc command-line options
(our manual is correct)
- fix for a failure of rpl_trigger.
mysql-test/t/rpl_misc_functions.test:
test was cleaning up only on slave, but it's also needed on master,
otherwise it influences rpl_trigger.test
sql/lock.cc:
clearer name
sql/mysqld.cc:
I checked the code that those two variables are not about binlogging
but about the size of the transaction's memroot which is used
to create savepoint structures and to store list of tables to be invalidated
(for NDB). The manual has a correct description, no need to fix it.
sql/sql_base.cc:
clearer name
sql/sql_derived.cc:
clearer name
sql/sql_select.cc:
clearer name
sql/table.h:
clearer name: TMP_TABLE is used for non-transactional tables.
what it actually means (Monty approved the renaming)
- correcting description of transaction_alloc command-line options
(our manual is correct)
- fix for a failure of rpl_trigger.
into mysql.com:/home/hf/work/mrg/mysql-5.0-opt
sql/item.h:
Auto merged
sql/sql_base.cc:
Auto merged
sql/sql_select.cc:
Auto merged
sql/sql_yacc.yy:
Auto merged
into mysql.com:/home/hf/work/mrg/mysql-5.1-opt
libmysqld/lib_sql.cc:
Auto merged
sql/item.h:
Auto merged
sql/sql_base.cc:
Auto merged
sql/sql_class.h:
Auto merged
sql/sql_select.cc:
Auto merged
sql/sql_yacc.yy:
Auto merged
into magare.gmz:/home/kgeorge/mysql/autopush/B24484-5.0
mysql-test/r/subselect3.result:
Auto merged
sql/item.h:
Auto merged
sql/item_sum.cc:
Auto merged
sql/opt_range.cc:
Auto merged
sql/sql_base.cc:
Auto merged
sql/sql_class.h:
Auto merged
sql/sql_insert.cc:
Auto merged
sql/sql_select.cc:
Auto merged
To correctly decide which predicates can be evaluated with a given table
the optimizer must know the exact set of tables that a predicate depends
on. If that mask is too wide (refer to non-existing tables) the optimizer
can erroneously skip a predicate.
One such case of wrong table usage mask were the aggregate functions.
The have a all-1 mask (meaning depend on all tables, including non-existent
ones).
Fixed by making a real used_tables mask for the aggregates. The mask is
constructed in the following way :
1. OR the table dependency masks of all the arguments of the aggregate.
2. If all the arguments of the function are from the local name resolution
context and it is evaluated in the same name resolution
context where it is referenced all the tables from that name resolution
context are OR-ed to the dependency mask. This is to denote that an
aggregate function depends on the number of rows it processes.
3. Handle correctly the case of an aggregate function optimization (such that
the aggregate function can be pre-calculated and made a constant).
Made sure that an aggregate function is never a constant (unless subject of a
specific optimization and pre-calculation).
One other flaw was revealed and fixed in the process : references were
not calling the recalculation method for used_tables of their targets.
mysql-test/r/subselect3.result:
Bug #24484: test case
mysql-test/t/subselect3.test:
Bug #24484: test case
sql/item.h:
Bug #24484: Item_ref must update the used tables.
sql/item_sum.cc:
Bug #24484: correct calculation of used_tables for aggregates.
sql/item_sum.h:
Bug #24484: correct calculation of used_tables for aggregates.
sql/opt_range.cc:
Bug #24484: fixed ref resolution in loose index scan
sql/sql_base.cc:
Bug #24484: moved counting of leaf tables inside
setup_tables_and_check_access.
sql/sql_class.h:
Bug #24484: changed table count to more narrow type.
sql/sql_insert.cc:
Bug #24484: moved counting of leaf tables inside
setup_tables_and_check_access. Substract the first
table (and its subtables) of an INSERT statement
from leaf_count.
sql/sql_select.cc:
Bug #24484: correct check for aggregates
To correctly decide which predicates can be evaluated with a given table
the optimizer must know the exact set of tables that a predicate depends
on. If that mask is too wide (refer to non-existing tables) the optimizer
can erroneously skip a predicate.
One such case of wrong table usage mask were the aggregate functions.
The have a all-1 mask (meaning depend on all tables, including non-existent
ones).
Fixed by making a real used_tables mask for the aggregates. The mask is
constructed in the following way :
1. OR the table dependency masks of all the arguments of the aggregate.
2. If all the arguments of the function are from the local name resolution
context and it is evaluated in the same name resolution
context where it is referenced all the tables from that name resolution
context are OR-ed to the dependency mask. This is to denote that an
aggregate function depends on the number of rows it processes.
3. Handle correctly the case of an aggregate function optimization (such that
the aggregate function can be pre-calculated and made a constant).
Made sure that an aggregate function is never a constant (unless subject of a
specific optimization and pre-calculation).
One other flaw was revealed and fixed in the process : references were
not calling the recalculation method for used_tables of their targets.
into bodhi.local:/opt/local/work/mysql-5.1-runtime
include/my_global.h:
Auto merged
mysql-test/mysql-test-run.pl:
Auto merged
mysql-test/r/events_scheduling.result:
Auto merged
BitKeeper/deleted/.del-init_db.sql~a77d572c39d5a1f8:
Auto merged
BitKeeper/deleted/.del-mysql_create_system_tables.sh:
Auto merged
mysql-test/r/query_cache.result:
Auto merged
mysql-test/r/view.result:
Auto merged
mysql-test/t/events_scheduling.test:
Auto merged
mysql-test/t/grant_cache.test:
Auto merged
mysql-test/t/query_cache.test:
Auto merged
mysql-test/t/view.test:
Auto merged
scripts/mysql_system_tables_fix.sql:
Auto merged
sql/event_db_repository.cc:
Auto merged
sql/event_queue.cc:
Auto merged
sql/field.cc:
Auto merged
sql/handler.cc:
Auto merged
sql/handler.h:
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/log_event.cc:
Auto merged
sql/mysql_priv.h:
Auto merged
sql/mysqld.cc:
Auto merged
sql/set_var.cc:
Auto merged
sql/sp.cc:
Auto merged
sql/sp_head.cc:
Auto merged
sql/sp_head.h:
Auto merged
sql/sql_base.cc:
Auto merged
sql/sql_class.cc:
Auto merged
sql/sql_class.h:
Auto merged
sql/sql_help.cc:
Auto merged
sql/sql_lex.cc:
Auto merged
sql/sql_lex.h:
Auto merged
sql/sql_parse.cc:
Auto merged
sql/sql_prepare.cc:
Auto merged
sql/sql_select.cc:
Auto merged
sql/sql_show.cc:
Auto merged
sql/sql_table.cc:
Auto merged
sql/sql_yacc.yy:
Auto merged
sql/table.cc:
Auto merged
sql/share/errmsg.txt:
Auto merged
sql/tztime.cc:
Auto merged
storage/innobase/handler/ha_innodb.cc:
Auto merged
storage/myisam/ha_myisam.cc:
Auto merged
storage/myisam/ha_myisam.h:
Auto merged
mysql-test/r/skip_grants.result:
Manualmerge.
mysql-test/r/sp.result:
Manualmerge.
mysql-test/t/skip_grants.test:
Manualmerge.
mysql-test/t/sp.test:
Manualmerge.
sql/event_data_objects.cc:
Manualmerge.
into bodhi.local:/opt/local/work/mysql-5.0-runtime
sql/field.cc:
Auto merged
sql/item.cc:
Auto merged
sql/item.h:
Auto merged
sql/item_func.cc:
Auto merged
sql/sp_head.cc:
Auto merged
sql/sql_base.cc:
Auto merged
sql/sql_select.cc:
Auto merged
sql/sql_show.cc:
Auto merged
sql/sql_table.cc:
Auto merged
sql/sql_yacc.yy:
Auto merged
mysql-test/r/sp.result:
SCCS merged
mysql-test/t/sp.test:
SCCS merged
into weblab.(none):/home/marcsql/TREE/mysql-5.1-26503-merge
mysql-test/t/sp-error.test:
Auto merged
sql/handler.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/log_event.cc:
Auto merged
sql/sp_head.cc:
Auto merged
sql/sp_head.h:
Auto merged
sql/sql_base.cc:
Auto merged
sql/sql_show.cc:
Auto merged
sql/sql_table.cc:
Auto merged
sql/sql_yacc.yy:
Auto merged
into magare.gmz:/home/kgeorge/mysql/autopush/WL3527-5.1-opt
BitKeeper/deleted/.del-sql_parse.cc.rej:
Auto merged
BitKeeper/deleted/.del-table.cc.rej:
Auto merged
mysql-test/r/endspace.result:
Auto merged
mysql-test/t/group_by.test:
Auto merged
sql/item.cc:
Auto merged
sql/mysql_priv.h:
Auto merged
sql/opt_range.cc:
Auto merged
sql/sql_class.h:
Auto merged
sql/sql_delete.cc:
Auto merged
sql/sql_help.cc:
Auto merged
sql/sql_lex.cc:
Auto merged
sql/sql_lex.h:
Auto merged
sql/sql_parse.cc:
Auto merged
sql/sql_show.cc:
Auto merged
sql/sql_update.cc:
Auto merged
sql/sql_yacc.yy:
Auto merged
sql/table.cc:
Auto merged
storage/myisam/ha_myisam.cc:
Auto merged
BitKeeper/deleted/.del-mysqld.cc.rej~35c1c438e11ebd89:
Auto merged
mysql-test/r/group_by.result:
manual merge to 5.1-opt
sql/mysqld.cc:
manual merge to 5.1-opt
sql/sql_base.cc:
manual merge to 5.1-opt
sql/sql_select.cc:
manual merge to 5.1-opt
sql/table.h:
manual merge to 5.1-opt
into moonlight.home:/home/tomash/src/mysql_ab/mysql-5.1-bug9953
mysql-test/r/sp-error.result:
Auto merged
mysql-test/r/view.result:
Auto merged
sql/item_timefunc.cc:
Auto merged
sql/lock.cc:
Auto merged
sql/log_event.cc:
Auto merged
sql/mysql_priv.h:
Auto merged
sql/set_var.cc:
Auto merged
sql/sp.cc:
Auto merged
sql/sql_base.cc:
Auto merged
sql/sql_help.cc:
Auto merged
sql/sql_lex.cc:
Auto merged
sql/sql_lex.h:
Auto merged
sql/sql_parse.cc:
Auto merged
sql/sql_show.cc:
Auto merged
sql/sql_view.cc:
Auto merged
sql/table.cc:
Auto merged
sql/tztime.cc:
Auto merged
storage/myisam/ha_myisam.cc:
Auto merged
sql/sql_yacc.yy:
SCCS merged
The problem was that some facilities (like CONVERT_TZ() function or
server HELP statement) may require implicit access to some tables in
'mysql' database. This access was done by ordinary means of adding
such tables to the list of tables the query is going to open.
However, if we issued LOCK TABLES before that, we would get "table
was not locked" error trying to open such implicit tables.
The solution is to treat certain tables as MySQL system tables, like
we already do for mysql.proc. Such tables may be opened for reading
at any moment regardless of any locks in effect. The cost of this is
that system table may be locked for writing only together with other
system tables, it is disallowed to lock system tables for writing and
have any other lock on any other table.
After this patch the following tables are treated as MySQL system
tables:
mysql.help_category
mysql.help_keyword
mysql.help_relation
mysql.help_topic
mysql.proc (it already was)
mysql.time_zone
mysql.time_zone_leap_second
mysql.time_zone_name
mysql.time_zone_transition
mysql.time_zone_transition_type
These tables are now opened with open_system_tables_for_read() and
closed with close_system_tables(), or one table may be opened with
open_system_table_for_update() and closed with close_thread_tables()
(the latter is used for mysql.proc table, which is updated as part of
normal MySQL server operation). These functions may be used when
some tables were opened and locked already.
NOTE: online update of time zone tables is not possible during
replication, because there's no time zone cache flush neither on LOCK
TABLES, nor on FLUSH TABLES, so the master may serve stale time zone
data from cache, while on slave updated data will be loaded from the
time zone tables.
mysql-test/r/help.result:
Update result.
mysql-test/r/lock.result:
Update result.
mysql-test/r/sp-error.result:
Update result.
mysql-test/r/timezone2.result:
Add result for bug#9953: CONVERT_TZ requires mysql.time_zone_name
to be locked.
mysql-test/r/view.result:
Update result: use table t3 rather than utilize MySQL system table.
mysql-test/t/help.test:
Test that we can use HELP even under LOCK TABLES.
mysql-test/t/lock.test:
Test LOCK TABLE on system tables.
mysql-test/t/timezone2.test:
Add test case for bug#9953: CONVERT_TZ requires mysql.time_zone_name
to be locked.
mysql-test/t/view.test:
Update test: use table t3 rather that utilize MySQL system table.
sql/handler.h:
Fix comment for 'count' parameter of check_if_locking_is_allowed().
Add 'current' and 'system_count' parameters.
sql/item_create.cc:
We no longer have LEX::add_time_zone_tables_to_query_tables().
sql/item_timefunc.cc:
We no longer have LEX::time_zone_tables_used, so
Item_func_convert_tz::fix_fields() became the same as base
Item_date_func::fix_fields().
my_tz_find() no longer takes table list, but takes THD pointer now.
sql/item_timefunc.h:
Remove dead field and method.
sql/lock.cc:
Pass values for 'current' and 'system_count' to
check_if_locking_is_allowed().
sql/log_event.cc:
We no longer have my_tz_find_with_opening_tz_tables(), its functions is
performed by my_tz_find().
sql/mysql_priv.h:
Add functions to work with MySQL system tables.
sql/set_var.cc:
my_tz_find() no longer takes table list, but takes THD pointer now.
sql/sp.cc:
Remove close_proc_table(). Use close_system_tables() instead.
Use open_system_tables_for_read() and open_system_table_for_update().
sql/sp.h:
Remove close_proc_table() declaration.
sql/sql_base.cc:
Add implementation of open_system_tables_for_read(),
close_system_tables(), open_system_table_for_update().
sql/sql_help.cc:
Operate on MySQL system tables mysql.help_* with
open_system_tables_for_read() and close_system_tables() to allow the
usage of HELP statement under LOCK TABLES.
sql/sql_lex.cc:
Remove LEX::time_zone_tables_used and
LEX::add_time_zone_tables_to_query_tables() which are no longer used.
sql/sql_lex.h:
Remove LEX::time_zone_tables_used and
LEX::add_time_zone_tables_to_query_tables() which are no longer used.
sql/sql_parse.cc:
Remove references to LEX::time_zone_tables_used and
my_tz_check_n_skip_implicit_tables() which are no longer used.
sql/sql_show.cc:
Use close_system_tables() instead of removed close_proc_table().
sql/sql_view.cc:
LEX::time_zone_tables_used is no longer there.
sql/sql_yacc.yy:
LEX::add_time_zone_tables_to_query_tables() is no longer there.
sql/table.cc:
Add more tables that should be treated as MySQL system tables.
sql/share/errmsg.txt:
Change the error message, as now we allow write-locking of several
system tables if not mixed with ordinary tables.
sql/tztime.cc:
Do not add time zone tables to the list of query tables in
tz_init_table_list().
Remove fake_time_zone_tables_list and my_tz_get_tables_list().
In my_tz_init(), open mysql.time_zone_leap_second with
simple_open_n_lock_tables(), but pass time zone name to my_tz_find(),
which will open and close time zone tables as necessary.
In tz_load_from_open_tables() do not call table->use_all_columns(), as
this was already done in open_system_tables_for_read().
my_tz_find() takes THD pointer instead of table list, and calls
open_system_tables_for_read() and close_system_tables() as necessary.
Remove my_tz_find_with_opening_tz_tables().
sql/tztime.h:
Remove declarations of my_tz_get_table_list(),
my_tz_find_with_opening_tz_tables(), fake_time_zone_tables_list,
definition of my_tz_check_n_skip_implicit_tables().
Update prototype for my_tz_find().
storage/csv/ha_tina.cc:
Add new parameters to check_if_locking_is_allowed().
storage/csv/ha_tina.h:
Add new parameters to check_if_locking_is_allowed().
storage/myisam/ha_myisam.cc:
Add new parameters to check_if_locking_is_allowed(). In this
function we count system tables. If there are system tables, but
there are also non-system tables, we report an error.
storage/myisam/ha_myisam.h:
Add new parameters to check_if_locking_is_allowed().
The problem was that some facilities (like CONVERT_TZ() function or
server HELP statement) may require implicit access to some tables in
'mysql' database. This access was done by ordinary means of adding
such tables to the list of tables the query is going to open.
However, if we issued LOCK TABLES before that, we would get "table
was not locked" error trying to open such implicit tables.
The solution is to treat certain tables as MySQL system tables, like
we already do for mysql.proc. Such tables may be opened for reading
at any moment regardless of any locks in effect. The cost of this is
that system table may be locked for writing only together with other
system tables, it is disallowed to lock system tables for writing and
have any other lock on any other table.
After this patch the following tables are treated as MySQL system
tables:
mysql.help_category
mysql.help_keyword
mysql.help_relation
mysql.help_topic
mysql.proc (it already was)
mysql.time_zone
mysql.time_zone_leap_second
mysql.time_zone_name
mysql.time_zone_transition
mysql.time_zone_transition_type
These tables are now opened with open_system_tables_for_read() and
closed with close_system_tables(), or one table may be opened with
open_system_table_for_update() and closed with close_thread_tables()
(the latter is used for mysql.proc table, which is updated as part of
normal MySQL server operation). These functions may be used when
some tables were opened and locked already.
NOTE: online update of time zone tables is not possible during
replication, because there's no time zone cache flush neither on LOCK
TABLES, nor on FLUSH TABLES, so the master may serve stale time zone
data from cache, while on slave updated data will be loaded from the
time zone tables.
include/my_global.h:
Introduce constants to be used instead of magic numbers.
sql/field.cc:
Polishing: use contants instead of magic numbers.
sql/ha_innodb.cc:
Polishing: use contants instead of magic numbers.
sql/handler.cc:
Polishing: use contants instead of magic numbers.
sql/item.cc:
Polishing: use contants instead of magic numbers.
sql/item.h:
Polishing: use contants instead of magic numbers.
sql/item_func.cc:
Polishing: use contants instead of magic numbers.
sql/item_subselect.cc:
Polishing: use contants instead of magic numbers.
sql/log_event.cc:
Polishing: use contants instead of magic numbers.
sql/sql_base.cc:
Polishing: use contants instead of magic numbers.
sql/sql_select.cc:
Polishing: use contants instead of magic numbers.
sql/sql_show.cc:
Polishing: use contants instead of magic numbers.
sql/sql_table.cc:
Polishing: use contants instead of magic numbers.
into mysql.com:/home/hf/work/mrg/mysql-5.1-opt
mysql-test/r/order_by.result:
Auto merged
mysql-test/r/subselect.result:
Auto merged
mysql-test/t/order_by.test:
Auto merged
mysql-test/t/sp.test:
Auto merged
sql/item.cc:
Auto merged
sql/item_cmpfunc.cc:
Auto merged
sql/item_cmpfunc.h:
Auto merged
sql/item_func.cc:
Auto merged
sql/mysql_priv.h:
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_load.cc:
Auto merged
sql/sql_parse.cc:
Auto merged
sql/sql_select.cc:
Auto merged
sql/sql_update.cc:
Auto merged
mysql-test/r/func_str.result:
merging
mysql-test/r/sp.result:
merging
mysql-test/r/view.result:
merging
mysql-test/t/func_str.test:
merging
mysql-test/t/view.test:
merging
into mysql.com:/home/hf/work/mrg/mysql-5.0-opt
mysql-test/r/order_by.result:
Auto merged
mysql-test/r/subselect.result:
Auto merged
mysql-test/t/order_by.test:
Auto merged
mysql-test/t/sp.test:
Auto merged
sql/item.cc:
Auto merged
sql/item_cmpfunc.cc:
Auto merged
sql/item_cmpfunc.h:
Auto merged
sql/item_func.cc:
Auto merged
sql/mysql_priv.h:
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_load.cc:
Auto merged
sql/sql_parse.cc:
Auto merged
sql/sql_select.cc:
Auto merged
sql/sql_update.cc:
Auto merged
mysql-test/r/func_str.result:
merging
mysql-test/r/sp.result:
merging
mysql-test/r/view.result:
merging
mysql-test/t/func_str.test:
merging
mysql-test/t/view.test:
merging
into mysql.com:/home/hf/work/mrg/mysql-5.1-opt
BUILD/check-cpu:
Auto merged
mysql-test/r/explain.result:
Auto merged
mysql-test/r/func_str.result:
Auto merged
mysql-test/r/func_test.result:
Auto merged
mysql-test/r/subselect.result:
Auto merged
mysql-test/r/update.result:
Auto merged
mysql-test/r/view.result:
Auto merged
mysql-test/t/explain.test:
Auto merged
mysql-test/t/func_str.test:
Auto merged
mysql-test/t/sp.test:
Auto merged
sql/item.cc:
Auto merged
sql/item.h:
Auto merged
sql/item_cmpfunc.cc:
Auto merged
sql/item_func.cc:
Auto merged
sql/item_strfunc.h:
Auto merged
sql/sql_base.cc:
Auto merged
sql/sql_delete.cc:
Auto merged
sql/sql_insert.cc:
Auto merged
sql/sql_lex.cc:
Auto merged
sql/sql_lex.h:
Auto merged
sql/sql_load.cc:
Auto merged
sql/sql_parse.cc:
Auto merged
sql/sql_select.h:
Auto merged
sql/sql_update.cc:
Auto merged
mysql-test/r/func_in.result:
SCCS merged
mysql-test/r/order_by.result:
SCCS merged
mysql-test/r/sp.result:
merging
mysql-test/t/func_in.test:
SCCS merged
mysql-test/t/order_by.test:
SCCS merged
mysql-test/t/view.test:
merging
sql/item_cmpfunc.h:
merging
sql/mysql_priv.h:
merging
sql/sql_select.cc:
SCCS merged
into weblab.(none):/home/marcsql/TREE/mysql-5.0-8407_b
mysql-test/r/view.result:
Auto merged
sql/mysqld.cc:
Auto merged
sql/sp_head.cc:
Auto merged
sql/sp_head.h:
Auto merged
sql/sql_class.cc:
Auto merged
sql/sql_class.h:
Auto merged
sql/sql_update.cc:
Auto merged
sql/table.cc:
Auto merged
sql/table.h:
Auto merged
sql/sql_base.cc:
Manual merge
into weblab.(none):/home/marcsql/TREE/mysql-5.1-8407-merge
mysql-test/r/information_schema_db.result:
Auto merged
mysql-test/r/view.result:
Auto merged
mysql-test/t/sp.test:
Auto merged
sql/lock.cc:
Auto merged
sql/mysqld.cc:
Auto merged
sql/sp_head.cc:
Auto merged
sql/sp_head.h:
Auto merged
sql/sql_base.cc:
Auto merged
sql/sql_class.cc:
Auto merged
sql/sql_update.cc:
Auto merged
sql/table.cc:
Auto merged
sql/table.h:
Auto merged
into bodhi.local:/opt/local/work/mysql-5.1-runtime-merge
BitKeeper/deleted/.del-ha_berkeley.cc:
Auto merged
cmd-line-utils/readline/xmalloc.c:
Auto merged
include/my_dbug.h:
Auto merged
mysql-test/mysql-test-run.pl:
Auto merged
mysql-test/t/disabled.def:
Auto merged
server-tools/instance-manager/instance_options.cc:
Auto merged
server-tools/instance-manager/mysqlmanager.cc:
Auto merged
sql/item_cmpfunc.cc:
Auto merged
sql/item_cmpfunc.h:
Auto merged
sql/item_func.cc:
Auto merged
sql/item_subselect.cc:
Auto merged
sql/item_subselect.h:
Auto merged
sql/log.cc:
Auto merged
sql/slave.cc:
Auto merged
sql/sp_head.cc:
Auto merged
sql/sql_class.cc:
Auto merged
sql/sql_lex.cc:
Auto merged
sql/sql_lex.h:
Auto merged
sql/sql_parse.cc:
Auto merged
sql/sql_repl.cc:
Auto merged
mysql-test/r/subselect.result:
Use local.
sql/ha_ndbcluster.cc:
Use local
storage/archive/ha_archive.cc:
Use local.
support-files/compiler_warnings.supp:
Use local
client/mysql_upgrade.c:
Manual merge.
client/mysqltest.c:
Manual merge.
mysql-test/t/subselect.test:
Manual merge.
sql/field.cc:
Manual merge.
sql/sql_base.cc:
Manual merge.
sql/sql_yacc.yy:
Manual merge.
Bug 18914 (Calling certain SPs from triggers fail)
Bug 20713 (Functions will not not continue for SQLSTATE VALUE '42S02')
Bug 21825 (Incorrect message error deleting records in a table with a
trigger for inserting)
Bug 22580 (DROP TABLE in nested stored procedure causes strange dependency
error)
Bug 25345 (Cursors from Functions)
This fix resolves a long standing issue originally reported with bug 8407,
which affect the behavior of Stored Procedures, Stored Functions and Trigger
in many different ways, causing symptoms reported by all the bugs listed.
In all cases, the root cause of the problem traces back to 8407 and how the
server locks tables involved with sub statements.
Prior to this fix, the implementation of stored routines would:
- compute the transitive closure of all the tables referenced by a top level
statement
- open and lock all the tables involved
- execute the top level statement
"transitive closure of tables" means collecting:
- all the tables,
- all the stored functions,
- all the views,
- all the table triggers
- all the stored procedures
involved, and recursively inspect these objects definition to find more
references to more objects, until the list of every object referenced does
not grow any more.
This mechanism is known as "pre-locking" tables before execution.
The motivation for locking all the tables (possibly) used at once is to
prevent dead locks.
One problem with this approach is that, if the execution path the code
really takes during runtime does not use a given table, and if the table is
missing, the server would not execute the statement.
This in particular has a major impact on triggers, since a missing table
referenced by an update/delete trigger would prevent an insert trigger to run.
Another problem is that stored routines might define SQL exception handlers
to deal with missing tables, but the server implementation would never give
user code a chance to execute this logic, since the routine is never
executed when a missing table cause the pre-locking code to fail.
With this fix, the internal implementation of the pre-locking code has been
relaxed of some constraints, so that failure to open a table does not
necessarily prevent execution of a stored routine.
In particular, the pre-locking mechanism is now behaving as follows:
1) the first step, to compute the transitive closure of all the tables
possibly referenced by a statement, is unchanged.
2) the next step, which is to open all the tables involved, only attempts
to open the tables added by the pre-locking code, but silently fails without
reporting any error or invoking any exception handler is the table is not
present. This is achieved by trapping internal errors with
Prelock_error_handler
3) the locking step only locks tables that were successfully opened.
4) when executing sub statements, the list of tables used by each statements
is evaluated as before. The tables needed by the sub statement are expected
to be already opened and locked. Statement referencing tables that were not
opened in step 2) will fail to find the table in the open list, and only at
this point will execution of the user code fail.
5) when a runtime exception is raised at 4), the instruction continuation
destination (the next instruction to execute in case of SQL continue
handlers) is evaluated.
This is achieved with sp_instr::exec_open_and_lock_tables()
6) if a user exception handler is present in the stored routine, that
handler is invoked as usual, so that ER_NO_SUCH_TABLE exceptions can be
trapped by stored routines. If no handler exists, then the runtime execution
will fail as expected.
With all these changes, a side effect is that view security is impacted, in
two different ways.
First, a view defined as "select stored_function()", where the stored
function references a table that may not exist, is considered valid.
The rationale is that, because the stored function might trap exceptions
during execution and still return a valid result, there is no way to decide
when the view is created if a missing table really cause the view to be invalid.
Secondly, testing for existence of tables is now done later during
execution. View security, which consist of trapping errors and return a
generic ER_VIEW_INVALID (to prevent disclosing information) was only
implemented at very specific phases covering *opening* tables, but not
covering the runtime execution. Because of this existing limitation,
errors that were previously trapped and converted into ER_VIEW_INVALID are
not trapped, causing table names to be reported to the user.
This change is exposing an existing problem, which is independent and will
be resolved separately.
mysql-test/r/information_schema_db.result:
Revised the pre-locking code implementation, aligned the tests.
mysql-test/r/sp-error.result:
Revised the pre-locking code implementation, aligned the tests.
mysql-test/r/sp.result:
Revised the pre-locking code implementation, aligned the tests.
mysql-test/r/trigger.result:
Revised the pre-locking code implementation, aligned the tests.
mysql-test/r/view.result:
Revised the pre-locking code implementation, aligned the tests.
mysql-test/t/sp-error.test:
Revised the pre-locking code implementation, aligned the tests.
mysql-test/t/sp.test:
Revised the pre-locking code implementation, aligned the tests.
mysql-test/t/trigger.test:
Revised the pre-locking code implementation, aligned the tests.
sql/lock.cc:
table->placeholder now checks for schema_table
sql/mysqld.cc:
my_message_sql(): invoke internal exception handlers
sql/sp_head.cc:
exec_open_and_lock_tables(): open and lock tables, or return the
continuation destination of this instruction
sql/sp_head.h:
exec_open_and_lock_tables(): open and lock tables, or return the
continuation destination of this instruction
sql/sql_base.cc:
Prelock_error_handler: delay open table errors until execution
sql/sql_class.cc:
THD: add internal error handler, as an exception mechanism.
sql/sql_class.h:
THD: add internal error handler, as an exception mechanism.
sql/sql_update.cc:
table->placeholder now checks for schema_table
sql/table.cc:
st_table_list::hide_view_error(): masked more errors for view security
sql/table.h:
table->placeholder now checks for schema_table, and unopened tables
