XOR conditions are not optimized, and Item_cond_xor therefore
acts like type Func_item even though it inherits from Item_cond.
A subtle difference between Item_func and Item_cond is that
you can get the children Items from the former by calling
arguments(), and from the latter by calling argument_list().
However, since Item_cond_xor inherits from Item_cond,
arguments() did not return any Items.
The fact that Item_cond_xor::arguments() did not return it's
children items lead to a problem for make_cond_for_index();
the method accepted that XOR items on unindexed columns were
pushed using ICP. ICP evaluation of non-indexed columns
does not (and should not) work.
The fix for this bug is to make Item_cond_xor return it's
children items when the arguments() method is used. This makes
Item_cond_xor behave more like Item_func and in turn allows
make_cond_for_index() to discover any conflicting children
Items.
This is a temporary fix and should be removed when Item_cond_xor
is optimized.
- Add opt_range_mrr.cc file into source repo
mysql-test/r/myisam_mrr.result:
Make testcase work for both debug and release
mysql-test/t/myisam_mrr.test:
Make testcase work for both debug and release
sql/Makefile.am:
- Add opt_range_mrr.cc file into source repo
- Make index condition pushdown be controlled by an @@optimizer_switch flag,
not by @@engine_condition_pushdown
- Make MRR buffer size be controlled by @@mrr_buffer_size, not
by @@read_rnd_buffer_size
- Move parts of code to separate files
- Code cleanup
- Add --sorted_result to some SELECTs in tests.
WL#2474 "Multi Range Read: Change the default MRR implementation to implement new MRR interface"
WL#2475 "Batched range read functions for MyISAM/InnoDb"
"Index condition pushdown for MyISAM/InnoDB"
- Adjust test results (checked)
- Code cleanup.
WL#2474 "Multi Range Read: Change the default MRR implementation to implement new MRR interface"
WL#2475 "Batched range read functions for MyISAM/InnoDb"
"Index condition pushdown for MyISAM/InnoDB"
Igor's fix from sp1r-igor@olga.mysql.com-20080330055902-07614:
There could be observed the following problems:
1. EXPLAIN did not mention pushdown conditions from on expressions in the
'extra' column. As a result if a query had no where conditions pushed
down to a table, but had on conditions pushed to this table the 'extra'
column in the EXPLAIN for the table missed 'using where'.
2. Conditions for ref access were not eliminated from on expressions
though such conditions were eliminated from the where condition.
The original code comes, as far as I know, from Google (Mark Callaghan's team) with additional work from Percona, Ourdelta and Weldon Whipple.
This code provides the same functionallity, but with a lot of changes to make it faster and better fit the MariaDB infrastucture.
Added new status variables:
- Com_show_client_statistics, Com_show_index_statistics, Com_show_table_statistics, Com_show_user_statistics
- Access_denied_errors, Busy_time (clock time), Binlog_bytes_written, Cpu_time, Empty_queries, Rows_sent, Rows_read
Added new variable / startup option 'userstat' to control if user statistics should be enabled or not
Added my_getcputime(); Returns cpu time used by this thread.
New FLUSH commands:
- FLUSH SLOW QUERY LOG
- FLUSH TABLE_STATISTICS
- FLUSH INDEX_STATISTICS
- FLUSH USER_STATISTICS
- FLUSH CLIENT_STATISTICS
New SHOW commands:
- SHOW CLIENT_STATISTICS
- SHOW USER_STATISTICS
- SHOW TABLE_STATISTICS
- SHOW INDEX_STATISTICS
New Information schemas:
- CLIENT_STATISTICS
- USER_STATISTICS
- INDEX_STATISTICS
- TABLE_STATISTICS
Added support for all new flush commands to mysqladmin
Added handler::ha_... wrappers for all handler read calls to do statistics counting
- Changed all code to use new ha_... calls
- Count number of read rows, changed rows and rows read trough an index
Added counting of number of bytes sent to binary log (status variable Binlog_bytes_written)
Added counting of access denied errors (status variable Access_denied_erors)
Bugs fixed:
- Fixed bug in add_to_status() and add_diff_to_status() where longlong variables where threated as long
- CLOCK_GETTIME was not propely working on Linuxm
client/mysqladmin.cc:
Added support for all new flush commmands and some common combinations:
flush-slow-log
flush-table-statistics
flush-index-statistics
flush-user-statistics
flush-client-statistics
flush-all-status
flush-all-statistics
configure.in:
Added checking if clock_gettime needs the librt.
(Fixes Bug #37639 clock_gettime is never used/enabled in Linux/Unix)
include/my_sys.h:
Added my_getcputime()
include/mysql_com.h:
Added LIST_PROCESS_HOST_LEN & new REFRESH target defines
mysql-test/r/information_schema.result:
New information schema tables added
mysql-test/r/information_schema_all_engines.result:
New information schema tables added
mysql-test/r/information_schema_db.result:
New information schema tables added
mysql-test/r/log_slow.result:
Added testing that flosh slow query logs is accepted
mysql-test/r/status_user.result:
Basic testing of user, client, table and index statistics
mysql-test/t/log_slow.test:
Added testing that flosh slow query logs is accepted
mysql-test/t/status_user-master.opt:
Ensure that we get a fresh restart before running status_user.test
mysql-test/t/status_user.test:
Basic testing of user, client, table and index statistics
mysys/my_getsystime.c:
Added my_getcputime()
Returns cpu time used by this thread.
sql/authors.h:
Updated authors to have core and original MySQL developers first.
sql/event_data_objects.cc:
Updated call to mysql_reset_thd_for_next_command()
sql/event_db_repository.cc:
Changed to use new ha_... calls
sql/filesort.cc:
Changed to use new ha_... calls
sql/ha_partition.cc:
Changed to use new ha_... calls
Fixed comment syntax
sql/handler.cc:
Changed to use new ha_... calls
Reset table statistics
Added code to update global table and index status
Added counting of rows changed
sql/handler.h:
Added table and index statistics variables
Added function reset_statistics()
Added handler::ha_... wrappers for all handler read calls to do statistics counting
Protected all normal read calls to ensure we use the new calls in the server.
Made ha_partition a friend class so that partition code can call the old read functions
sql/item_subselect.cc:
Changed to use new ha_... calls
sql/lex.h:
Added keywords for new information schema tables and flush commands
sql/log.cc:
Added flush_slow_log()
Added counting of number of bytes sent to binary log
Removed not needed test of thd (It's used before, so it's safe to use)
Added THD object to MYSQL_BIN_LOG::write_cache() to simplify statistics counting
sql/log.h:
Added new parameter to write_cache()
Added flush_slow_log() functions.
sql/log_event.cc:
Updated call to mysql_reset_thd_for_next_command()
Changed to use new ha_... calls
sql/log_event_old.cc:
Updated call to mysql_reset_thd_for_next_command()
Changed to use new ha_... calls
sql/mysql_priv.h:
Updated call to mysql_reset_thd_for_next_command()
Added new statistics functions and variables needed by these.
sql/mysqld.cc:
Added new statistics variables and structures to handle these
Added new status variables:
- Com_show_client_statistics, Com_show_index_statistics, Com_show_table_statistics, Com_show_user_statistics
- Access_denied_errors, Busy_time (clock time), Binlog_bytes_written, Cpu_time, Empty_queries, Rows_set, Rows_read
Added new option 'userstat' to control if user statistics should be enabled or not
sql/opt_range.cc:
Changed to use new ha_... calls
sql/opt_range.h:
Changed to use new ha_... calls
sql/opt_sum.cc:
Changed to use new ha_... calls
sql/records.cc:
Changed to use new ha_... calls
sql/set_var.cc:
Added variable 'userstat'
sql/sp.cc:
Changed to use new ha_... calls
sql/sql_acl.cc:
Changed to use new ha_... calls
Added counting of access_denied_errors
sql/sql_base.cc:
Added call to statistics functions
sql/sql_class.cc:
Added usage of org_status_var, to store status variables at start of command
Added functions THD::update_stats(), THD::update_all_stats()
Fixed bug in add_to_status() and add_diff_to_status() where longlong variables where threated as long
sql/sql_class.h:
Added new status variables to status_var
Moved variables that was not ulong in status_var last.
Added variables to THD for storing temporary values during statistics counting
sql/sql_connect.cc:
Variables and functions to calculate user and client statistics
Added counting of access_denied_errors and lost_connections
sql/sql_cursor.cc:
Changed to use new ha_... calls
sql/sql_handler.cc:
Changed to use new ha_... calls
sql/sql_help.cc:
Changed to use new ha_... calls
sql/sql_insert.cc:
Changed to use new ha_... calls
sql/sql_lex.h:
Added SQLCOM_SHOW_USER_STATS, SQLCOM_SHOW_TABLE_STATS, SQLCOM_SHOW_INDEX_STATS, SQLCOM_SHOW_CLIENT_STATS
sql/sql_parse.cc:
Added handling of:
- SHOW CLIENT_STATISTICS
- SHOW USER_STATISTICS
- SHOW TABLE_STATISTICS
- SHOW INDEX_STATISTICS
Added handling of new FLUSH commands:
- FLUSH SLOW QUERY LOGS
- FLUSH TABLE_STATISTICS
- FLUSH INDEX_STATISTICS
- FLUSH USER_STATISTICS
- FLUSH CLIENT_STATISTICS
Added THD parameter to mysql_reset_thd_for_next_command()
Added initialization and calls to user statistics functions
Added increment of statistics variables empty_queries, rows_sent and access_denied_errors.
Added counting of cpu time per query
sql/sql_plugin.cc:
Changed to use new ha_... calls
sql/sql_prepare.cc:
Updated call to mysql_reset_thd_for_next_command()
sql/sql_select.cc:
Changed to use new ha_... calls
Indentation changes
sql/sql_servers.cc:
Changed to use new ha_... calls
sql/sql_show.cc:
Added counting of access denied errors
Added function for new information schema tables:
- CLIENT_STATISTICS
- USER_STATISTICS
- INDEX_STATISTICS
- TABLE_STATISTICS
Changed to use new ha_... calls
sql/sql_table.cc:
Changed to use new ha_... calls
sql/sql_udf.cc:
Changed to use new ha_... calls
sql/sql_update.cc:
Changed to use new ha_... calls
sql/sql_yacc.yy:
Add new show and flush commands
sql/structs.h:
Add name_length to KEY to avoid some strlen
Added cache_name to KEY for fast storage of keyvalue in cache
Added structs USER_STATS, TABLE_STATS, INDEX_STATS
Added function prototypes for statistics functions
sql/table.cc:
Store db+table+index name into keyinfo->cache_name
sql/table.h:
Added new information schema tables
sql/tztime.cc:
Changed to use new ha_... calls
The test is supposed to provoke a deadlock, to test a crash of the server in
some deadlock scenarios.
The problem is that in recent version of MySQL, no deadlock occurs. It is not
clear why a deadlock should be expected. One transaction does an insert+delete
on primary key value 1 in table t2. The other transaction does an insert on
primary key value 123. There seems no reason that these should conflict, so
there is no deadlock.
(Presumably an earlier version did get a deadlock due to maybe taking excessive
locks on the insert+delete of primary key value 1. The table has only one row,
so maybe a different locking was used ("Impossible WHERE noticed after reading
const tables"))
Fix is to have transaction 1 lock PK 1 and transaction 2 lock PK 123. Then have
transaction 2 access PK 1 (wait) and transaction 1 access PK 123 (deadlock).
It has been checked that this modified test case still crashes the server in
the same way prior to fix of the original bug (Bug#24989).
mysql-test/include/read_many_rows.inc:
Provoke deadlock on same PK value in the two transactions to ensure that the
deadlock does occur independently on whatever execution plan is chosen.
mysql-test/r/read_many_rows_innodb.result:
Result file update.
The --enable_prepare_warnings allows to not discard warnings from autorepair
of crashed table in --ps-protocol mode.
Use this to properly fix the parts.partition_recover_myisam and
maria.maria-recover tests.
Add a test case for the new feature. This also adds missing test coverage
for the case where the same warning is thrown in both prepare and execute
phase.
client/mysqltest.cc:
Implement new commands --enable-prepare_warnings and --disable_prepare_warnings.
mysql-test/r/mysqltest_ps.result:
Add test case for new --enable_prepare_warning mysqltest command.
mysql-test/suite/maria/t/maria-recover.test:
Better fix of test case using new --enable_prepare_warnings command.
mysql-test/suite/parts/t/partition_recover_myisam.test:
Fix test failure in --ps-protocol mode.
mysql-test/t/mysqltest_ps.test:
Add test case for new --enable_prepare_warning mysqltest command.
- innodb-index needs regexp replace for embedded like other similar tests.
- partitions_special_* need to be modified for the extension from 16 to 32
max key parts allowed that was made in MariaDB.
When DNS is not working and returns some address even for non-existing
host names, some test cases fail with wrong error.
Fix by disabling these tests on such systems.
- Don't omit the @@debug variable from testcase check, since it can cause real problems.
- Fix some bad merges by reverting to be identical to MySQL 5.1.
mysql-test/include/mtr_check.sql:
Don't omit the @@debug variable from testcase check, since it can cause real problems.
mysql-test/r/mysqlbinlog_row_big.result:
Fix incorrect merge.
mysql-test/r/variables-big.result:
Fix incorrect merge, by reverting to MySQL 5.1 version.
mysql-test/t/mysqlbinlog_row_big.test:
Fix incorrect merge.
mysql-test/t/variables-big.test:
Fix incorrect merge, by reverting to MySQL 5.1 version.
mysql-test/r/mysqld_option_err.result:
Test that mysqld --not-known-option --help --verbose gives error
mysql-test/t/mysqld_option_err.test:
Test that mysqld --not-known-option --help --verbose gives error
This is needed to fix failures seen in Buildbot (main.ctype_gbk_binlog).
Problem is that some tests did not RESET MASTER, causing them to pick up random
binlog files depending on prior tests.
- mysqlslap result file update after merge.
- Fix skipping certain tests when running test suite as root, got broken somehow.
mysql-test/mysql-test-run.pl:
Somehow skipping tests when running as root got broken. The mysqltest if() no longer seems
to accept YES as a true value, so use 1 for true value instead.
mysql-test/r/mysqlslap.result:
Result file update after change in engine behaviour of mysqlslap.
mysql-test/t/mysqld_option_err.test:
This test does not work when run as root.
This adds a TIME_MS column to SHOW FULL PROCESSLIST and
INFORMATION_SCHEMA.PROCESSLIST that works like the TIME column, but
in units of milliseconds with microsecond precision.
Note that this also changes behaviour of the existing TIME column. In
the MySQL server, the TIME column changes when a thread sets @TIMESTAMP.
This is contrary to documentation and also potentially confusing, so
could in any case be considered a bug. With this patch, to ensure
consistency between TIME and TIME_MS, setting @TIMESTAMP has no effect
on either value.
Add a test case for the TIME and TIME_MS columns.
Update existing test cases for changed behaviour.
Author: Percona
Signed-off-by: Kristian Nielsen <knielsen@knielsen-hq.org>
mysql-test/r/create.result:
Result file update.
mysql-test/r/information_schema.result:
Add test case.
Result file update (changed behaviour).
mysql-test/t/information_schema.test:
Add test case.
Adjust test case for changed behaviour.
mysql-test/t/not_embedded_server.test:
Update (commented-out) test case for newly added column.
sql/sql_show.cc:
Merge Percona microsec_process patch into MariaDB.
include/my_global.h:
MWL#17: Table elimination: fixes for windows
- Add ALIGN_MAX_UNIT (assume malloc returns data aligned to this much)
mysql-test/r/table_elim.result:
MWL#17: Table elimination: fixes for windows
- Use only lower-case as EXPLAIN [EXTENDED] changes case of table names
on windows
mysql-test/t/table_elim.test:
MWL#17: Table elimination: fixes for windows
- Use only lower-case as EXPLAIN [EXTENDED] changes case of table names
on windows
sql/opt_table_elimination.cc:
MWL#17: Table elimination: fixes for windows
- Add extra alignment-padding-space for stack-allocated buffers.
Fix some mistakes in the original merge found during review.
mysql-test/include/concurrent.inc:
Add missing lines mistakenly omitted in merge.
mysql-test/include/mix1.inc:
Revert wrong change done during merge.
mysql-test/include/wait_for_status_var.inc.moved:
Remove file which was accidentally not removed during conflict resolution in merge.
mysql-test/r/innodb_mysql.result:
Revert result file change following fixing root problem in merge.
mysql-test/r/innodb.result:
Fix wrong merge of result file conflicts.
mysql-test/t/bug46080-master.opt:
Fix memory limit to take into account extra storage engines in MariaDB.
mysql-test/t/innodb.test:
Add comment clarifying tricky --replace_result.
sql/sql_select.cc:
Restore fix of Bug#34374, accudentally lost during MySQL 5.1.38 merge.
support-files/build-tags:
Fix missing -R option for bzr, accidentally lost in MySQL-5.1.38 merge.
