BitKeeper/etc/logging_ok:
auto-union
sql/ha_berkeley.cc:
Auto merged
sql/ha_heap.cc:
Auto merged
sql/ha_innodb.cc:
Auto merged
sql/ha_myisam.cc:
Auto merged
sql/ha_ndbcluster.cc:
Auto merged
sql/handler.cc:
Auto merged
sql/mysql_priv.h:
Auto merged
sql/mysqld.cc:
Auto merged
sql/sql_class.cc:
Auto merged
sql/sql_help.cc:
Auto merged
sql/sql_insert.cc:
Auto merged
sql/sql_lex.cc:
Auto merged
sql/sql_table.cc:
Auto merged
sql/sql_class.h:
SCCS merged
sql/sql_parse.cc:
SCCS merged
This allows one to setup a master <-> master replication with non conflicting auto-increment series.
Cleaned up binary log code to make it easyer to add new state variables.
Added simpler 'upper level' logic for artificial events (events that should not cause cleanups on slave).
Simplified binary log handling.
Changed how auto_increment works together with to SET INSERT_ID=# to make it more predictable: Now the inserted rows in a multi-row statement are set independent of the existing rows in the table. (Before only InnoDB did this correctly)
mysql-test/r/mix_innodb_myisam_binlog.result:
Disable End_log_pos column from 'show binlog events' as this is now different from before
mysql-test/t/mix_innodb_myisam_binlog.test:
Disable End_log_pos column from 'show binlog events' as this is now different from before
sql/ha_berkeley.cc:
Changed prototype for get_auto_increment()
sql/ha_berkeley.h:
Changed prototype for get_auto_increment()
sql/ha_heap.cc:
Changed prototype for get_auto_increment()
sql/ha_heap.h:
Changed prototype for get_auto_increment()
sql/ha_innodb.cc:
Change how auto-increment is calculated.
Now the auto-increment logic is done in 'update_auto_increment()' to ensure that all handlers has the same auto-increment usage
sql/ha_innodb.h:
Changed prototype for get_auto_increment()
sql/ha_myisam.cc:
Changed prototype for get_auto_increment()
sql/ha_myisam.h:
Changed prototype for get_auto_increment()
sql/ha_ndbcluster.cc:
Changed prototype for get_auto_increment()
sql/ha_ndbcluster.h:
Changed prototype for get_auto_increment()
sql/handler.cc:
Remove some usage of current_thd
Changed how auto_increment works with SET INSERT_ID to make it more predictable
(Now we should generate same auto-increment serie on a slave, even if the table has rows that was not on the master.
Use auto_increment_increment and auto_increment_offset
sql/handler.h:
Changed prototype for get_auto_increment()
sql/log.cc:
Remove usage of 'set_log_pos()' to make code simpler. (Now log_pos is set in write_header())
Use 'data_written' instead of 'get_event_len()' to calculate how much data was written in the log
sql/log_event.cc:
Simple optimizations.
Remove cached_event_len (not used variable)
Made comments fit into 79 chars
Removed Log_event::set_log_pos(). Now we calculate log_pos in write_header().
Renamed write_data() to write() as the original write() function was not needed anymore.
Call writing of event header from event::write() functions. This made it easier to calculate the length of an event.
Simplified 'write_header' and remove 'switches' from it.
Changed all write() functions to return 'bool'. (The previous return values where not consistent)
Store auto_increment_increment and auto_increment_offset in binary log
Simplified how Query_log_event's where written and read. Now it's much easier to add now status variables for a query event to the binary log.
Removed some old MySQL 4.x code to make it easier to grep for functions used in 5.0
sql/log_event.h:
Changed return type of write() functions to bool. (Before we returned -1 or 1 for errors)
write_data() -> write()
Added 'data_written' member to make it easier to get length of written event.
Removed 'cached_event_len' and 'get_event_len()'
Added usage of auto_increment_increment and auto_increment_offset
Added 'artifical_event' to Start_log_event_v3, to hide logic that we in the binary log use log_pos=0 as a flag for an artifical event.
sql/mysqld.cc:
Added options --auto-increment-increment and --auto-increment-offset
sql/set_var.cc:
Added variables auto_increment_increment and auto_increment_offset
sql/slave.cc:
Changed errors -> warnings & information (in error log)
sql/sql_class.cc:
Added THD::cleanup_after_query(). This makes some code simpler and allows us to clean up 'next_insert_id' after query
sql/sql_class.h:
Added new auto_increment_xxx variables
Moved some functions/variables in THD class
sql/sql_help.cc:
Removed compiler warning
sql/sql_insert.cc:
Call 'restore_auto_increment()' if row was not inserted.
This makes it easier for handler to reuse the last generated auto-incrment value that was not used (for example in case of duplicate key)
sql/sql_parse.cc:
Use cleanup_after_query()
sql/sql_prepare.cc:
Use cleanup_after_query()
sql/sql_table.cc:
R
This allows one to setup a master <-> master replication with non conflicting auto-increment series.
Cleaned up binary log code to make it easyer to add new state variables.
Added simpler 'upper level' logic for artificial events (events that should not cause cleanups on slave).
Simplified binary log handling.
Changed how auto_increment works together with to SET INSERT_ID=# to make it more predictable: Now the inserted rows in a multi-row statement are set independent of the existing rows in the table. (Before only InnoDB did this correctly)
include/my_sys.h:
Auto merged
sql/ha_berkeley.cc:
Auto merged
sql/ha_heap.cc:
Auto merged
sql/ha_innodb.cc:
Auto merged
sql/ha_myisam.cc:
Auto merged
sql/ha_ndbcluster.cc:
Auto merged
sql/handler.cc:
Auto merged
sql/item_strfunc.cc:
Auto merged
sql/mysql_priv.h:
Auto merged
sql/sql_class.cc:
Auto merged
sql/sql_parse.cc:
Auto merged
sql/sql_select.cc:
Auto merged
sql/sql_show.cc:
Auto merged
sql/sql_yacc.yy:
Auto merged
sql/table.cc:
Auto merged
sql/sql_class.h:
Merge
into build.mysql.com:/users/tulin/mysql-4.1-ndb-merge
sql/ha_ndbcluster.cc:
Auto merged
sql/handler.cc:
Auto merged
sql/sql_class.cc:
Auto merged
sql/sql_class.h:
Auto merged
sql/sql_table.cc:
Auto merged
Fixed (together with Guilhem) bugs in mysqlbinlog regarding --offset
Prefix addresses with 0x for easier comparisons of debug logs
Fixed problem where MySQL choosed index-read even if there would be a much better range on the same index
This fix changed some 'index' queries to 'range' queries in the test suite
Don't create 'dummy' WHERE clause for trivial WHERE clauses where we can remove the WHERE clause.
This fix removed of a lot of 'Using where' notes in the test suite.
Give NOTE instead of WARNING if table/function doesn't exists when using DROP IF EXISTS
Give NOTE instead of WARNING for safe field-type conversions
Makefile.am:
Don't automaticly update files from bk
client/mysqlbinlog.cc:
Merge with 4.1 (+ apply bug fixes for --offset and --start-position)
include/my_sys.h:
Faster clear_alloc_root()
mysql-test/r/bdb.result:
Updated results after merge
mysql-test/r/create.result:
Updated results after merge
mysql-test/r/func_group.result:
Updated results after merge
mysql-test/r/func_if.result:
Updated results after merge
mysql-test/r/heap_btree.result:
Updated results after merge
mysql-test/r/index_merge.result:
Updated results after merge
mysql-test/r/index_merge_ror.result:
Updated results after merge
mysql-test/r/innodb.result:
Updated results after merge
mysql-test/r/join_outer.result:
Updated results after merge
mysql-test/r/mysqlbinlog2.result:
Updated results after merge
mysql-test/r/negation_elimination.result:
Updated results after merge
mysql-test/r/null.result:
Updated results after merge
Added more tests
mysql-test/r/null_key.result:
Updated results after merge
Added more tests
mysql-test/r/order_by.result:
Updated results after merge
mysql-test/r/range.result:
Updated results after merge
Added more tests
mysql-test/r/rpl_charset.result:
Updated results after merge
mysql-test/r/sp-error.result:
Updated results after merge
mysql-test/r/sp.result:
Updated results after merge
Added delete of some stored procedures in an attempt to be able to re-run test even if it aborts in the middle
mysql-test/r/type_blob.result:
Updated results after merge
(Some warnings are now notes)
mysql-test/r/user_var.result:
Updated results after merge
Added more tests
mysql-test/r/variables.result:
Updated results after merge
mysql-test/r/view.result:
Updated results after merge
mysql-test/t/mysqlbinlog2.test:
Updated tests to use new positions
mysql-test/t/null.test:
More tests
mysql-test/t/null_key.test:
More tests
mysql-test/t/range.test:
More tests
mysql-test/t/rpl_charset.test:
Avoid big diffs in the future if tests changes
mysql-test/t/sp-error.test:
Updated error numbers
mysql-test/t/sp-security.test:
Updated error numbers
mysql-test/t/sp.test:
Updated results after merge
Added delete of some stored procedures in an attempt to be able to re-run test even if it aborts in the middle
mysql-test/t/user_var.test:
More tests
mysql-test/t/view.test:
Updated error numbers
mysys/my_alloc.c:
Write into debug log the address of the allocated area
sql/ha_isam.cc:
Prefix addresses with 0x for easier comparisons of debug logs
sql/ha_myisam.cc:
Prefix addresses with 0x for easier comparisons of debug logs
sql/ha_ndbcluster.cc:
Add missing enum to switch
sql/handler.cc:
remove compiler warning
sql/item.cc:
More debugging
Simple cleanup
sql/item.h:
Move Item::cleanup() to item.cc
sql/item_cmpfunc.cc:
Fix arena code
sql/item_subselect.cc:
After merge fixes
sql/item_subselect.h:
After merge fixes
sql/item_sum.cc:
Updated comment
sql/log_event.cc:
Remove wrong test
sql/mysql_priv.h:
Indentation fixes
sql/mysqld.cc:
After merge fixes
Added 0x to pointers in debug log
sql/opt_range.cc:
Fixed problem where MySQL choosed index-read even if there would be a much better range on the same index
This fix changed some 'index' queries to 'range' queries in the test suite
sql/set_var.cc:
Indentation fixes
sql/sp_head.cc:
Set state to INITIALIZED to make SP work with new arena code
sql/sql_base.cc:
After merge fixes
sql/sql_class.cc:
More debugging
Use clear_alloc_root() instead of init_alloc_root() as the former is faster
sql/sql_class.h:
New method 'only_prepare()'
sql/sql_lex.cc:
After merge fixes
sql/sql_lex.h:
After merge fixes
sql/sql_parse.cc:
Fix for timezone tables. (The old way to add timezone tables to global list in 'create_total_list' doesn't work anymore)
Give NOTE instead of WARNING if table/function doesn't exists when using DROP IF EXISTS
sql/sql_prepare.cc:
After merge fixes
sql/sql_select.cc:
Don't create 'dummy' WHERE clause for trivial WHERE clauses where we can remove the WHERE clause.
This fix removed of a lot of 'Using where' notes in the test suite
sql/sql_table.cc:
Give NOTE instead of WARNING if table/function doesn't exists when using DROP IF EXISTS
sql/sql_union.cc:
After merge fix
sql/sql_view.cc:
After merge fix
sql/table.cc:
After merge fix
sql/tztime.cc:
Update timezone table handling to use new table lists structure
sql/tztime.h:
Update timezone table handling to use new table lists structure
sql/unireg.cc:
Use 0x before pointers
Fixed (together with Guilhem) bugs in mysqlbinlog regarding --offset
Prefix addresses with 0x for easier comparisons of debug logs
Fixed problem where MySQL choosed index-read even if there would be a much better range on the same index
This fix changed some 'index' queries to 'range' queries in the test suite
Don't create 'dummy' WHERE clause for trivial WHERE clauses where we can remove the WHERE clause.
This fix removed of a lot of 'Using where' notes in the test suite.
Give NOTE instead of WARNING if table/function doesn't exists when using DROP IF EXISTS
Give NOTE instead of WARNING for safe field-type conversions
server" (use my_charset_bin for stmt id hash).
sql/sql_class.cc:
Fix for bug#5399 "Wrong statement executed by MySQL server":
we hash stmt ids bytewise, need to use binary collation for it.
tests/client_test.c:
Test case for bug#5399 "Wrong statement executed by MySQL server":
create number of statements returning different results, execute them
one by one.
mysys/mf_format.c:
I think here i fixed a bug
sql/item_strfunc.cc:
mysql_real_data_home added
sql/sql_class.cc:
it's more closer to what manual says
sql/sql_load.cc:
code rewritten to be similar
sql/sql_table.cc:
mysql_real_data_home added to the path
(Includes merge of arena code in 4.1 and 5.0)
BitKeeper/etc/ignore:
auto-union
BitKeeper/etc/logging_ok:
auto-union
VC++Files/sql/mysqld.dsp:
Auto merged
client/mysql.cc:
Auto merged
client/mysqltest.c:
Auto merged
include/my_global.h:
Auto merged
include/my_sys.h:
Auto merged
include/mysql.h:
Auto merged
include/mysql_com.h:
Auto merged
innobase/row/row0sel.c:
Auto merged
libmysql/client_settings.h:
Auto merged
libmysql/libmysql.c:
Auto merged
libmysqld/Makefile.am:
Auto merged
libmysqld/examples/Makefile.am:
Auto merged
libmysqld/lib_sql.cc:
Auto merged
myisam/mi_check.c:
Auto merged
myisam/myisamchk.c:
Auto merged
myisam/sort.c:
Auto merged
mysql-test/r/connect.result:
Auto merged
mysql-test/r/ctype_recoding.result:
Auto merged
mysql-test/r/ctype_ucs.result:
Auto merged
mysql-test/r/func_in.result:
Auto merged
mysql-test/r/func_like.result:
Auto merged
mysql-test/r/gis.result:
Auto merged
mysql-test/r/having.result:
Auto merged
mysql-test/r/heap.result:
Auto merged
mysql-test/r/join.result:
Auto merged
mysql-test/r/key.result:
Auto merged
mysql-test/r/lowercase_table.result:
Auto merged
mysql-test/r/ndb_autodiscover.result:
Auto merged
mysql-test/r/null.result:
Auto merged
mysql-test/r/olap.result:
Auto merged
mysql-test/r/order_by.result:
Auto merged
mysql-test/r/ps_1general.result:
Auto merged
mysql-test/r/ps_2myisam.result:
Auto merged
mysql-test/r/ps_3innodb.result:
Auto merged
mysql-test/r/ps_4heap.result:
Auto merged
mysql-test/r/ps_5merge.result:
Auto merged
mysql-test/r/ps_6bdb.result:
Auto merged
mysql-test/r/range.result:
Auto merged
mysql-test/r/rename.result:
Auto merged
mysql-test/r/show_check.result:
Auto merged
mysql-test/r/subselect.result:
Auto merged
mysql-test/r/union.result:
Auto merged
mysql-test/r/variables.result:
Auto merged
mysql-test/t/alter_table.test:
Auto merged
mysql-test/t/null.test:
Auto merged
mysql-test/t/ps_1general.test:
Auto merged
mysql-test/t/rpl_charset.test:
Auto merged
mysql-test/t/rpl_heap.test:
Auto merged
mysql-test/t/rpl_relayrotate.test:
Auto merged
mysql-test/t/subselect.test:
Auto merged
mysql-test/t/variables.test:
Auto merged
netware/mysql_test_run.c:
Auto merged
scripts/make_binary_distribution.sh:
Auto merged
scripts/mysql_create_system_tables.sh:
Auto merged
scripts/mysql_fix_privilege_tables.sql:
Auto merged
scripts/mysql_install_db.sh:
Auto merged
sql/ha_berkeley.cc:
Auto merged
sql/ha_innodb.cc:
Auto merged
sql/ha_innodb.h:
Auto merged
sql/ha_myisam.cc:
Auto merged
sql/handler.cc:
Auto merged
sql/handler.h:
Auto merged
sql/item.h:
Auto merged
sql/item_cmpfunc.h:
Auto merged
sql/item_create.cc:
Auto merged
sql/item_create.h:
Auto merged
sql/item_func.cc:
Auto merged
sql/item_func.h:
Auto merged
sql/item_timefunc.cc:
Auto merged
sql/item_timefunc.h:
Auto merged
sql/lex.h:
Auto merged
sql/lock.cc:
Auto merged
sql/log_event.cc:
Auto merged
sql/mysql_priv.h:
Auto merged
sql/opt_sum.cc:
Auto merged
sql/protocol.cc:
Auto merged
sql/records.cc:
Auto merged
sql/repl_failsafe.cc:
Auto merged
sql/set_var.cc:
Auto merged
sql/set_var.h:
Auto merged
sql/slave.cc:
Auto merged
sql/sql_acl.cc:
Auto merged
sql/sql_acl.h:
Auto merged
sql/sql_db.cc:
Auto merged
sql/sql_delete.cc:
Auto merged
sql/sql_insert.cc:
Auto merged
sql/sql_list.h:
Auto merged
sql/sql_load.cc:
Auto merged
sql/sql_rename.cc:
Auto merged
sql/sql_select.h:
Auto merged
sql/sql_show.cc:
Auto merged
sql/sql_string.h:
Auto merged
sql/table.cc:
Auto merged
sql-common/client.c:
Auto merged
client/mysqlbinlog.cc:
Merge with 4.1
configure.in:
Merge with 4.1
include/mysqld_error.h:
Add new error message (1) from 4.1
mysql-test/mysql-test-run.sh:
Merge with 4.1
mysql-test/r/func_gconcat.result:
Merge with 4.1
mysql-test/r/func_if.result:
Merge with 4.1
mysql-test/r/grant.result:
Merge with 4.1
mysql-test/r/join_outer.result:
Merge with 4.1
mysql-test/r/rpl_charset.result:
Merge with 4.1 (This has to be fixed before pushing)
mysql-test/r/system_mysql_db.result:
Merge with 4.1.
Added collation to new privileges
mysql-test/t/grant.test:
Merge with 4.1
mysql-test/t/grant_cache.test:
Merge with 4.1
mysql-test/t/show_check.test:
Merge with 4.1
sql/Makefile.am:
Merge with 4.1
sql/item.cc:
Merge with 4.1
sql/item_cmpfunc.cc:
Merge with 4.1 (arena code)
sql/item_subselect.cc:
Merge with 4.1
sql/item_subselect.h:
Merge with 4.1
sql/item_sum.cc:
Merge with 4.1
sql/item_sum.h:
Merge with 4.1
sql/log.cc:
Merge with 4.1 (Remove code that is not relevant for 5.0)
sql/mysqld.cc:
Merge with 4.1
sql/opt_range.cc:
Merge with 4.1
sql/share/czech/errmsg.txt:
Merge with 4.1
sql/share/danish/errmsg.txt:
Merge with 4.1
sql/share/dutch/errmsg.txt:
Merge with 4.1
sql/share/english/errmsg.txt:
Merge with 4.1
sql/share/estonian/errmsg.txt:
Merge with 4.1
sql/share/french/errmsg.txt:
Merge with 4.1
sql/share/german/errmsg.txt:
Merge with 4.1
sql/share/greek/errmsg.txt:
Merge with 4.1
sql/share/hungarian/errmsg.txt:
Merge with 4.1
sql/share/italian/errmsg.txt:
Merge with 4.1
sql/share/japanese/errmsg.txt:
Merge with 4.1
sql/share/korean/errmsg.txt:
Merge with 4.1
sql/share/norwegian-ny/errmsg.txt:
Merge with 4.1
sql/share/norwegian/errmsg.txt:
Merge with 4.1
sql/share/polish/errmsg.txt:
Merge with 4.1
sql/share/portuguese/errmsg.txt:
Merge with 4.1
sql/share/romanian/errmsg.txt:
Merge with 4.1
sql/share/russian/errmsg.txt:
Merge with 4.1
sql/share/serbian/errmsg.txt:
Merge with 4.1
sql/share/slovak/errmsg.txt:
Merge with 4.1
sql/share/spanish/errmsg.txt:
Merge with 4.1
sql/share/swedish/errmsg.txt:
Merge with 4.1
sql/share/ukrainian/errmsg.txt:
Merge with 4.1
sql/sql_base.cc:
Merge with 4.1
sql/sql_class.cc:
Merge with 4.1
Use arena code from 4.1
sql/sql_class.h:
Merge with 4.1
Use arena code from 4.1
sql/sql_derived.cc:
Merge with 4.1
sql/sql_lex.cc:
Merge with 4.1
sql/sql_lex.h:
Merge with 4.1
sql/sql_parse.cc:
Merge with 4.1
sql/sql_prepare.cc:
Merge with 4.1
sql/sql_select.cc:
Merge with 4.1
sql/sql_table.cc:
Merge with 4.1
sql/sql_union.cc:
Merge with 4.1
sql/sql_yacc.yy:
Merge with 4.1
sql/tztime.cc:
Merge with 4.1
tests/client_test.c:
Merge with 4.1
added tests to alter table for "large" alter tables and truncates in ndbcluster
added debug printout in restart() in ndbcluster
added flag THD::transaction.on to enable/disable transaction
mysql-test/r/ndb_alter_table.result:
added tests to alter table for "large" alter tables and truncates
mysql-test/t/ndb_alter_table.test:
added tests to alter table for "large" alter tables and truncates
ndb/src/ndbapi/NdbConnection.cpp:
added debug printout in restart()
sql/ha_ndbcluster.cc:
added support for large alter table and truncate
sql/handler.cc:
renamed ha_recovery_logging to ha_enable_transaction
sql/handler.h:
renamed ha_recovery_logging to ha_enable_transaction
sql/sql_class.cc:
added flag THD::transaction.on to enable/disable transaction
sql/sql_class.h:
added flag THD::transaction.on to enable/disable transaction
sql/sql_delete.cc:
added disable transaction for mysql_truncate
sql/sql_table.cc:
renamed ha_recovery_logging to ha_enable_transaction
added tests to alter table for "large" alter tables and truncates in ndbcluster
added debug printout in restart() in ndbcluster
added flag THD::transaction.on to enable/disable transaction
Add missing parameter to strxnmov() that caused some INTO OUTFILE commands to core dump
mysql-test/mysql-test-run.sh:
Ensure that clients used the supplied --socket argument
mysql-test/r/lowercase_table.result:
Remove tables used in other tests that may affect this one
mysql-test/r/rename.result:
Remove tables used in other tests that may affect this one
mysql-test/t/lowercase_table.test:
Remove tables used in other tests that may affect this one
mysql-test/t/rename.test:
Remove tables used in other tests that may affect this one
sql/item_cmpfunc.cc:
Remove not relevant comment
sql/sql_class.cc:
Add missing parameter to strxnmov() that caused some INTO OUTFILE commands to core dump
sql/sql_load.cc:
Remove extra '/' after mysql_real_data_home
sql/sql_table.cc:
Remove extra '/' after mysql_real_data_home
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_select.cc:
Auto merged
sql/sql_class.cc:
Manual resolve of the merge
In some places in mysqld behaviour depends on system working directory
It works badly in libmysqld because user can set it in the way he needs.
I think we should explicitly insert mysql_real_data_home value in
paths in these places
sql/sql_class.cc:
here we concat mysql_real_data_home and thd->db to be the prefix
sql/sql_load.cc:
it's better to build the prefix from mysql_real_data_home
also i think it's better always to call my_load_path to not to depend
of current system working directory
In some places in mysqld behaviour depends on system working directory
It works badly in libmysqld because user can set it in the way he needs.
I think we should explicitly insert mysql_real_data_home value in
paths in these places
execute crashes server": we were deleting lex->result
after each execute, but prepared statements assumed that
it's left intact.
The fix adds cleanup() method to select_result hierarchy,
so that result objects can be reused.
Plus we now need to delete result objects more wisely.
mysql-test/r/ps.result:
Test results fixed: test case for bug#5034
mysql-test/t/ps.test:
A test case for bug#5034, few followups
sql/sql_class.cc:
- fix warning in THD::THD
- implementation of cleanup() for select_result hierarchy
- select_export::send_eof was identical to
select_dump::send_eof: moved to the base class select_to_file.
- Statement::end_statement() to end lex, free items, and
delete possible select_result
sql/sql_class.h:
- select_result::cleanup() declaration
-
sql/sql_insert.cc:
- implementation of select_insert::cleanup(): currently
we always create a new instance of select_insert/
select_create on each execute.
sql/sql_lex.cc:
- with more complicated logic of freeing lex->result it's
easier to have it non-zero only if it points to a valid
result.
sql/sql_lex.h:
Now st_lex::st_lex is not empty.
sql/sql_parse.cc:
mysql_execute_command():
- delete select_result *result only if it was created in
this function.
- use end_statement() to cleanup lex and thd in the end of
each statement.
- no need to save THD::lock if this is explain. This save
apparently left from times when derived tables were
materialized here, not in open_and_lock_tables.
sql/sql_prepare.cc:
- call result->cleanup() in reset_stmt_for_execute
- now Statement is responsible for freeing its lex->result.
sql/sql_select.cc:
handle_select():
- don't delete result, it might be needed
for next executions
- result is never null
execute crashes server": we were deleting lex->result
after each execute, but prepared statements assumed that
it's left intact.
The fix adds cleanup() method to select_result hierarchy,
so that result objects can be reused.
Plus we now need to delete result objects more wisely.
