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* MDEV-7215 EXPLAIN REPLACE produces an error: Column count doesn't match ↵Oleksandr Byelkin2015-12-101-0/+14
| | | | | | value count removed outdated code which was causing error (no need reassign result for subqueries & Co)
* Check for duplicate index (port from mysql)unknown2013-09-201-0/+40
| | | | (pre fts)
* Update test results (checked)Sergey Petrunya2012-08-281-5/+5
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* Patch for mdev-287: CHEAP SQ: A query with subquery in SELECT list, EXISTS, ↵unknown2012-05-301-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | inner joins takes hundreds times longer Analysis: The fix for lp:944706 introduces early subquery optimization. While a subquery is being optimized some of its predicates may be removed. In the test case, the EXISTS subquery is constant, and is evaluated to TRUE. As a result the whole OR is TRUE, and thus the correlated condition "b = alias1.b" is optimized away. The subquery becomes non-correlated. The subquery cache is designed to work only for correlated subqueries. If constant subquery optimization is disallowed, then the constant subquery is not evaluated, the subquery remains correlated, and its execution is cached. As a result execution is fast. However, when the constant subquery was optimized away, it was neither cached by the subquery cache, nor it was cached by the internal subquery caching. The latter was due to the fact that the subquery still appeared as correlated to the subselect_XYZ_engine::exec methods, and they re-executed the subquery on each call to Item_subselect::exec. Solution: The solution is to update the correlated status of the subquery after it has been optimized. This status consists of: - st_select_lex::is_correlated - Item_subselect::is_correlated - SELECT_LEX::uncacheable - SELECT_LEX_UNIT::uncacheable The status is updated by st_select_lex::update_correlated_cache(), and its caller st_select_lex::optimize_unflattened_subqueries. The solution relies on the fact that the optimizer already called st_select_lex::update_used_tables() for each subquery. This allows to efficiently update the correlated status of each subquery without walking the whole subquery tree. Notice that his patch is an improvement over MySQL 5.6 and older, where subqueries are not pre-optimized, and the above analysis is not possible.
* Fix for bug lp:944706, task MDEV-193unknown2012-05-171-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | The patch enables back constant subquery execution during query optimization after it was disabled during the development of MWL#89 (cost-based choice of IN-TO-EXISTS vs MATERIALIZATION). The main idea is that constant subqueries are allowed to be executed during optimization if their execution is not expensive. The approach is as follows: - Constant subqueries are recursively optimized in the beginning of JOIN::optimize of the outer query. This is done by the new method JOIN::optimize_constant_subqueries(). This is done so that the cost of executing these queries can be estimated. - Optimization of the outer query proceeds normally. During this phase the optimizer may request execution of non-expensive constant subqueries. Each place where the optimizer may potentially execute an expensive expression is guarded with the predicate Item::is_expensive(). - The implementation of Item_subselect::is_expensive has been extended to use the number of examined rows (estimated by the optimizer) as a way to determine whether the subquery is expensive or not. - The new system variable "expensive_subquery_limit" controls how many examined rows are considered to be not expensive. The default is 100. In addition, multiple changes were needed to make this solution work in the light of the changes made by MWL#89. These changes were needed to fix various crashes and wrong results, and legacy bugs discovered during development.
* 5.3 mergeSergei Golubchik2012-01-131-7/+13
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| * Back-ported the patch of the mysql-5.6 code line thatIgor Babaev2011-12-241-5/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | fixed several defects in the greedy optimization: 1) The greedy optimizer calculated the 'compare-cost' (CPU-cost) for iterating over the partial plan result at each level in the query plan as 'record_count / (double) TIME_FOR_COMPARE' This cost was only used locally for 'best' calculation at each level, and *not* accumulated into the total cost for the query plan. This fix added the 'CPU-cost' of processing 'current_record_count' records at each level to 'current_read_time' *before* it is used as 'accumulated cost' argument to recursive best_extension_by_limited_search() calls. This ensured that the cost of a huge join-fanout early in the QEP was correctly reflected in the cost of the final QEP. To get identical cost for a 'best' optimized query and a straight_join with the same join order, the same change was also applied to optimize_straight_join() and get_partial_join_cost() 2) Furthermore to get equal cost for 'best' optimized query and a straight_join the new code substrcated the same '0.001' in optimize_straight_join() as it had been already done in best_extension_by_limited_search() 3) When best_extension_by_limited_search() aggregated the 'best' plan a plan was 'best' by the check : 'if ((search_depth == 1) || (current_read_time < join->best_read))' The term '(search_depth == 1' incorrectly caused a new best plan to be collected whenever the specified 'search_depth' was reached - even if this partial query plan was more expensive than what we had already found.
| * Backport of WL#5953 from MySQL 5.6unknown2011-12-191-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The patch differs from the original MySQL patch as follows: - All test case differences have been reviewed one by one, and care has been taken to restore the original plan so that each test case executes the code path it was designed for. - A bug was found and fixed in MariaDB 5.3 in Item_allany_subselect::cleanup(). - ORDER BY is not removed because we are unsure of all effects, and it would prevent enabling ORDER BY ... LIMIT subqueries. - ref_pointer_array.m_size is not adjusted because we don't do array bounds checking, and because it looks risky. Original comment by Jorgen Loland: ------------------------------------------------------------- WL#5953 - Optimize away useless subquery clauses For IN/ALL/ANY/SOME/EXISTS subqueries, the following clauses are meaningless: * ORDER BY (since we don't support LIMIT in these subqueries) * DISTINCT * GROUP BY if there is no HAVING clause and no aggregate functions This WL detects and optimizes away these useless parts of the query during JOIN::prepare()
| * Made the optimizer switch flags 'outer_join_with_cache', 'semijoin_with_cache'Igor Babaev2011-12-151-0/+3
| | | | | | | | set to 'on' by default.
| * Set new default values for the optimizer switch flags 'derived_merge'Igor Babaev2011-11-261-0/+3
| | | | | | | | and 'derived_with_keys'. Now they are set on by default.
| * Update test resultsSergey Petrunya2011-11-251-4/+4
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* | 5.3->5.5 mergeSergei Golubchik2011-11-271-1/+1
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| * Made the optimizer switch for index condition pushdown set to 'on' by default. Igor Babaev2011-11-211-1/+1
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* | 5.3->5.5 mergeSergei Golubchik2011-11-221-6/+6
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| * Fixed LP bug #889750.Igor Babaev2011-11-151-2/+2
| | | | | | | | | | | | | | | | | | If the optimizer switch 'semijoin_with_cache' is set to 'off' then join cache cannot be used to join inner tables of a semijoin. Also fixed a bug in the function check_join_cache_usage() that led to wrong output of the EXPLAIN commands for some test cases.
| * Change the default @@optimizer_switch settings:Sergey Petrunya2011-11-021-4/+4
| | | | | | | | | | | | - semijoin=on - firstmatch=on - loosescan=on
| * Making subquery cache on by default.unknown2011-10-051-1/+1
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| * Merge 5.2->5.3unknown2011-09-021-1/+1
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| | * LP BUG#823169 fix.unknown2011-09-021-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For ANY subqueries NULLs should be ignored (if there is other values) when finding max min. For ALL subqueries NULLs should be saved if they found. Optimisation for ALL suqbueries if NULL is possible in the SELECT list with max/min aggregate function switched off. Some test changed where NULL is not used but optimization with max/min aggregate function important so NOT NULL added. mysql-test/r/explain.result: Forced old optimization. mysql-test/r/subselect.result: Forced old optimization. New test suite. mysql-test/t/explain.test: Forced old optimization. mysql-test/t/subselect.test: Forced old optimization. New test suite. sql/item_subselect.cc: Store converted subquery type. Switch off aggregate function optimisation for ALL and nulls. sql/sql_class.cc: Fixed NULL comparison. sql/sql_class.h: Store converted subquery type.
* | | mysql-5.5.18 mergeSergei Golubchik2011-11-031-3/+0
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| * \ \ merge 5.1 => 5.5 : Bug#12329653Tor Didriksen2011-05-051-4/+6
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| | * \ \ merge 5.0 => 5.1 : Bug#12329653Tor Didriksen2011-05-041-5/+6
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| | | * | | Bug#12329653 - EXPLAIN, UNION, PREPARED STATEMENT, CRASH, SQL_FULL_GROUP_BYTor Didriksen2011-05-041-5/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The query was re-written *after* we had tagged it with NON_AGG_FIELD_USED. Remove the flag before continuing. mysql-test/r/explain.result: Update test case for Bug#48295. mysql-test/r/subselect.result: New test case. mysql-test/t/explain.test: Update test case for Bug#48295. mysql-test/t/subselect.test: New test case. sql/item.cc: Use accessor functions for non_agg_field_used/agg_func_used. sql/item_subselect.cc: Remove non_agg_field_used when we rewrite query '1 < some (...)' => '1 < max(...)' sql/item_sum.cc: Use accessor functions for non_agg_field_used/agg_func_used. sql/mysql_priv.h: Remove unused #defines. sql/sql_lex.cc: Initialize new member variables. sql/sql_lex.h: Replace full_group_by_flag with two boolean flags, and itroduce accessors for manipulating them. sql/sql_select.cc: Use accessor functions for non_agg_field_used/agg_func_used.
* | | | | | merge with 5.3Sergei Golubchik2011-10-191-32/+51
|\ \ \ \ \ \ | | |_|_|/ / | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | sql/sql_insert.cc: CREATE ... IF NOT EXISTS may do nothing, but it is still not a failure. don't forget to my_ok it. ****** CREATE ... IF NOT EXISTS may do nothing, but it is still not a failure. don't forget to my_ok it. sql/sql_table.cc: small cleanup ****** small cleanup
| * | | | | Merge.Igor Babaev2011-07-211-2/+3
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| | * | | | | Made the optimizer switches 'derived_merge' and 'derived_with_keys'Igor Babaev2011-07-211-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | off by default.
| * | | | | | Merge from 5.2unknown2011-07-211-5/+5
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| | * | | | Removed incorrect fix and its test suite (the test suit is duplicate).unknown2011-07-211-5/+5
| | | |/ / | | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fixed explains of previous patch. mysql-test/r/explain.result: Fixed explains of previous patch. mysql-test/r/join_outer.result: Fixed explains of previous patch. mysql-test/r/negation_elimination.result: Fixed explains of previous patch. mysql-test/r/view.result: Fixed explains of previous patch. mysql-test/suite/innodb/r/innodb_mysql.result: Removed duplicate test suite. mysql-test/suite/innodb/t/innodb_mysql.test: Removed duplicate test suite. mysql-test/suite/innodb_plugin/r/innodb_mysql.result: Removed duplicate test suite. mysql-test/suite/innodb_plugin/t/innodb_mysql.test: Removed duplicate test suite. sql/opt_range.h: Removed incorrect fix. sql/records.cc: Removed incorrect fix.
| * | | | Make subquery cache off by default.unknown2011-07-151-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | mysql-test/r/subselect_scache.result: Test with subquery cache on. mysql-test/t/subselect_scache.test: Test with subquery cache on.
| * | | | Set the default to be mrr=off,mrr_sort_keys=off:Sergey Petrunya2011-07-081-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Set the default - Adjust the testcases so that 'new' tests are run with optimizations turned on. - Pull out relevant tests from "irrelevant" tests and run them with optimizations on. - Run range.test and innodb.test with both mrr=on and mrr=off
| * | | | Change the default @@optimizer_switch setting fromSergey Petrunya2011-07-051-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | semijoin=on,firstmatch=on,loosescan=on to semijoin=off,firstmatch=off,loosescan=off Adjust the testcases: - Modify subselect*.test and join_cache.test so that all tests use the same execution paths as before (i.e. optimizations that are being tested are enabled) - Let all other test files run with the new default settings (i.e. with new optimizations disabled) - Copy subquery testcases from these files into t/subselect_extra.test which will run them with new optimizations enabled.
| * | | | Merged the code of mwl 106 into the latest 5.3 with mwl 90 pushed.Igor Babaev2011-06-041-9/+8
| |\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Resolved all conflicts and failures.
| | * \ \ \ MergeIgor Babaev2011-05-201-9/+8
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| | | * \ \ \ Merged the code of MWL#106 into 5.3Igor Babaev2011-05-161-6/+6
| | | |\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Resolved all conflicts, bad merges and fixed a few minor bugs in the code. Commented out the queries from multi_update, view, subselect_sj, func_str, derived_view, view_grant that failed either with crashes in ps-protocol or with wrong results. The failures are clear indications of some bugs in the code and these bugs are to be fixed.
| | | | * \ \ \ Merge of the mwl106 tree into the latest 5.3 tree.Igor Babaev2010-09-231-6/+6
| | | | |\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | Resolved conflicts. Adjusted some test results
| | | | | * | | | MWL#106: Backport optimizations for derived tables and views.Igor Babaev2010-05-261-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The main consolidated patch.
| * | | | | | | | Merge with 5.1-microsecondsMichael Widenius2011-05-281-3/+3
| |\ \ \ \ \ \ \ \ | | |/ / / / / / / | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A lot of small fixes and new test cases. client/mysqlbinlog.cc: Cast removed client/mysqltest.cc: Added missing DBUG_RETURN include/my_pthread.h: set_timespec_time_nsec() now only takes one argument mysql-test/t/date_formats.test: Remove --disable_ps_protocl as now also ps supports microseconds mysys/my_uuid.c: Changed to use my_interval_timer() instead of my_getsystime() mysys/waiting_threads.c: Changed to use my_hrtime() sql/field.h: Added bool special_const_compare() for fields that may convert values before compare (like year) sql/field_conv.cc: Added test to get optimal copying of identical temporal values. sql/item.cc: Return that item_int is equal if it's positive, even if unsigned flag is different. Fixed Item_cache_str::save_in_field() to have identical null check as other similar functions Added proper NULL check to Item_cache_int::save_in_field() sql/item_cmpfunc.cc: Don't call convert_constant_item() if there is nothing that is worth converting. Simplified test when years should be converted sql/item_sum.cc: Mark cache values in Item_sum_hybrid as not constants to ensure they are not replaced by other cache values in compare_datetime() sql/item_timefunc.cc: Changed sec_to_time() to take a my_decimal argument to ensure we don't loose any sub seconds. Added Item_temporal_func::get_time() (This simplifies some things) sql/mysql_priv.h: Added Lazy_string_decimal() sql/mysqld.cc: Added my_decimal constants max_seconds_for_time_type, time_second_part_factor sql/table.cc: Changed expr_arena to be of type CONVENTIONAL_EXECUTION to ensure that we don't loose any items that are created by fix_fields() sql/tztime.cc: TIME_to_gmt_sec() now sets *in_dst_time_gap in case of errors This is needed to be able to detect if timestamp is 0 storage/maria/lockman.c: Changed from my_getsystime() to set_timespec_time_nsec() storage/maria/ma_loghandler.c: Changed from my_getsystime() to my_hrtime() storage/maria/ma_recovery.c: Changed from my_getsystime() to mmicrosecond_interval_timer() storage/maria/unittest/trnman-t.c: Changed from my_getsystime() to mmicrosecond_interval_timer() storage/xtradb/handler/ha_innodb.cc: Added support for new time,datetime and timestamp unittest/mysys/thr_template.c: my_getsystime() -> my_interval_timer() unittest/mysys/waiting_threads-t.c: my_getsystime() -> my_interval_timer()
| | * | | | | | | wl#173 - temporal types with sub-second resolutionSergei Golubchik2011-03-011-3/+3
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Use Field::cmp_type() == INT_RESULT instead * introduced Item::cmp_result() instead of Item::is_datetime() and Item::result_as_longlong() * in many cases date/time types are treated like other types, not as special cases * greatly simplified Arg_comparator (regarding date/time/year code) * SEC_TO_TIME is real function, not integer. * microsecond precision in NOW, CURTIME, etc * Item_temporal. All items derived from it only provide get_date, but no val* methods * replication of NOW(6) * Protocol::store(time) now takes the precision as an argument * @@TIMESTAMP is a double client/mysqlbinlog.cc: remove unneded casts include/my_sys.h: introduce my_hrtime_t, my_timediff_t, and conversion macros include/my_time.h: pack_time/unpack_time, etc. convenience functions to work with MYSQL_TIME::second_part libmysql/libmysql.c: str_to_time() is gone. str_to_datetime() does it now. my_TIME_to_str() takes the precision as an argument mysql-test/include/ps_conv.inc: time is not equal to datetime anymore mysql-test/r/distinct.result: a test for an old MySQL bug mysql-test/r/explain.result: numbers aren't quoted in EXPLAIN EXTENDED mysql-test/r/func_default.result: numbers aren't quoted in EXPLAIN EXTENDED mysql-test/r/func_sapdb.result: when decimals=NOT_FIXED_DEC it means "not fixed" indeed mysql-test/r/func_test.result: numbers aren't quoted in EXPLAIN EXTENDED mysql-test/r/func_time.result: ADDTIME()/SUBTIME()/+- INTERVAL now work with TIME values mysql-test/r/having.result: numbers aren't quoted in EXPLAIN EXTENDED mysql-test/r/information_schema.result: new column I_S.COLUMNS.DATETIME_PRECISION mysql-test/r/join_outer.result: numbers aren't quoted in EXPLAIN EXTENDED mysql-test/r/metadata.result: TIMESTAMP no longer has zerofill flag mysql-test/r/range.result: invalid datetime is not compared with as a string mysql-test/r/select.result: NO_ZERO_IN_DATE, etc only affect storage - according to the manual numbers aren't quoted in EXPLAIN EXTENDED mysql-test/r/subselect.result: numbers aren't quoted in EXPLAIN EXTENDED mysql-test/r/sysdate_is_now.result: when decimals=NOT_FIXED_DEC it means "not fixed" indeed mysql-test/r/type_blob.result: TIMESTAMP(N) is not deprecated mysql-test/r/type_timestamp.result: old TIMESTAMP(X) semantics is not supported anymore mysql-test/r/union.result: numbers aren't quoted in EXPLAIN EXTENDED mysql-test/r/varbinary.result: numbers aren't quoted in EXPLAIN EXTENDED mysql-test/t/distinct.test: test for an old MySQL bug mysql-test/t/func_time.test: +- INTERVAL now works with TIME values mysql-test/t/select.test: typo mysql-test/t/subselect.test: only one error per statement, please mysql-test/t/system_mysql_db_fix40123.test: old timestamp(X) is no longer supported mysql-test/t/system_mysql_db_fix50030.test: old timestamp(X) is no longer supported mysql-test/t/system_mysql_db_fix50117.test: old timestamp(X) is no longer supported mysql-test/t/type_blob.test: old timestamp(X) is no longer supported mysql-test/t/type_timestamp.test: old timestamp(X) is no longer supported mysys/my_getsystime.c: functions to get the time with microsecond precision mysys/my_init.c: move the my_getsystime.c initialization code to my_getsystime.c mysys/my_static.c: no need to make these variables extern mysys/my_static.h: no need to make these variables extern scripts/mysql_system_tables.sql: old timestamp(X) is no longer supported scripts/mysql_system_tables_fix.sql: old timestamp(X) is no longer supported scripts/mysqlhotcopy.sh: old timestamp(X) is no longer supported sql-common/my_time.c: * call str_to_time from str_to_datetime, as appropriate * date/time to string conversions take precision as an argument * number_to_time() * TIME_to_double() * pack_time() and unpack_time() sql/event_data_objects.cc: cast is not needed my_datetime_to_str() takes precision as an argument sql/event_db_repository.cc: avoid dangerous downcast (because the pointer is not always Field_timestamp, see events_1.test) sql/event_queue.cc: avoid silly double-work for cond_wait (having an endpoint of wait, subtract the current time to get the timeout, and use set_timespec() macro to fill in struct timespec, by adding the current time to the timeout) sql/field.cc: * remove virtual Field::get_time(), everyone should use only Field::get_date() * remove lots of #ifdef WORDS_BIGENDIAN * unified the warnings from Field_timestamp/datetime/time/date/newdate store methods * Field_timestamp_hires, Field_datetime_hires, Field_time_hires * Field_temporal * make_truncated_value_warning and Field::set_datetime_warning use Lazy_string as an argument, removed char*/int/double variants sql/field.h: * remove virtual Field::get_time(), everyone should use only Field::get_date() * remove lots of #ifdef WORDS_BIGENDIAN * unified the warnings from Field_timestamp/datetime/time/date/newdate store methods * Field_timestamp_hires, Field_datetime_hires, Field_time_hires * Field_temporal * make_truncated_value_warning and Field::set_datetime_warning use Lazy_string as an argument, removed char*/int/double variants * removed Field::can_be_compared_as_longlong(). Use Field::cmp_type() == INT_RESULT instead sql/filesort.cc: TIME_RESULT, cmp_time() sql/item.cc: * numbers aren't quoted in EXPLAIN EXTENDED * Item::cmp_result() instead of Item::is_datetime() and Item::result_as_longlong() * virtual Item::get_time() is gone * Item_param::field_type() is set correctly * Item_datetime, for a datetime constant * time to anything is compared as a time * Item_cache::print() prints the value is available * bug fixed in Item_cache_int::val_str() sql/item.h: * Item::print_value(), to be used from Item_xxx::print() when needed * Item::cmp_result() instead of Item::is_datetime() and Item::result_as_longlong() * virtual Item::get_time() is gone * Item_datetime, for a datetime constant * better default for cast_to_int_type() * Item_cache objects now *always* have the field_type() set sql/item_cmpfunc.cc: * get_year_value, get_time_value are gone. get_datetime_value does it all * get_value_a_func, get_value_b_func are gone * can_compare_as_dates() is gone too, TIME_RESULT is used instead * cmp_type() instead or result_type() when doing a comparison * compare_datetime and compate_e_datetime in the comparator_matrix, is_nulls_eq is gone * Item::cmp_result() instead of Item::is_datetime() and Item::result_as_longlong() sql/item_cmpfunc.h: greatly simplified Arg_comparator sql/item_create.cc: * fix a bug in error messages in CAST sql/item_func.cc: Item::cmp_result() instead of Item::is_datetime() and Item::result_as_longlong() mention all possibitiles in switch over Item_result values, or use default: sql/item_row.h: overwrite the default cmp_type() for Item_row, as no MYSQL_TYPE_xxx value corresponds to ROW_RESULT sql/item_timefunc.cc: rewrite make_datetime to support precision argument SEC_TO_TIME is real function, not integer. many functions that returned temporal values had duplicate code in val_* methods, some of them did not have get_date() which resulted in unnecessary date->str->date conversions. Now they all are derived from Item_temporal_func and *only* provide get_date, not val* methods. many fixes to set decimals (datetime precision) correctly. sql/item_timefunc.h: SEC_TO_TIME is real function, not integer. many functions that returned temporal values had duplicate code in val_* methods, some of them did not have get_date() which resulted in unnecessary date->str->date conversions. Now they all are derived from Item_temporal_func and *only* provide get_date, not val* methods. many fixes to set decimals (datetime precision) correctly. sql/log_event.cc: replication of NOW(6) sql/log_event.h: replication of NOW(6) sql/mysql_priv.h: Lazy_string class to pass a value (string, number, time) polymorphically down the stack. make_truncated_value_warning() that uses it. sql/mysqld.cc: datetime in Arg_comparator::comparator_matrix sql/opt_range.cc: cleanup: don't disable warnings before calling save_in_field_no_warnings() sql/protocol.cc: Protocol::store(time) now takes the precision as an argument sql/protocol.h: Protocol::store(time) now takes the precision as an argument sql/rpl_rli.cc: small cleanup sql/set_var.cc: SET TIMESTAMP=double sql/set_var.h: @@TIMESTAMP is a double sql/share/errmsg.txt: precision and scale are unsigned sql/slave.cc: replication of NOW(6) sql/sp_head.cc: cleanup sql/sql_class.cc: support for NOW(6) sql/sql_class.h: support for NOW(6) sql/sql_insert.cc: support for NOW(6) sql/sql_select.cc: use item->cmp_type(). move a comment where it belongs sql/sql_show.cc: new column I_S.COLUMNS.DATETIME_PRECISION sql/sql_yacc.yy: TIME(X), DATETIME(X), cast, NOW(X), CURTIME(X), etc sql/time.cc: fix date_add_interval() to support MYSQL_TIMESTAMP_TIME argument storage/myisam/ha_myisam.cc: TIMESTAMP no longer carries ZEROFIELD flag, still we keep MYI file compatible. strings/my_vsnprintf.c: warnings tests/mysql_client_test.c: old timestamp(X) does not work anymore datetime is no longer equal to time
| * | | | | | | mergeunknown2011-05-101-7/+11
| |\ \ \ \ \ \ \ | | | |/ / / / / | | |/| | | | |
| | * | | | | | Moving max/min optimization from prepare to optimization phase. MWL#148Oleksandr Byelkin2011-05-041-7/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | mysql-test/r/explain.result: fixed results (new item) mysql-test/r/subselect.result: fixed results (new item) mysql-test/r/subselect_no_mat.result: fixed results (new item) mysql-test/r/subselect_no_opts.result: fixed results (new item) mysql-test/r/subselect_no_semijoin.result: Fixed results (new item) mysql-test/suite/pbxt/r/subselect.result: Fixed results (new item) mysql-test/t/explain.test: Fixed results (correct behaviour) sql/item_cmpfunc.cc: Pass through for max/min sql/item_subselect.cc: moving max/min sql/item_subselect.h: moving max/min sql/mysql_priv.h: new uncacheble flags added sql/opt_subselect.cc: maxmin moved. sql/opt_subselect.h: New function for maxmin. sql/sql_class.h: debug code sql/sql_lex.cc: Fixed flags. Limit setting fixed. sql/sql_lex.h: 2 new flags. sql/sql_select.cc: Prepare divided on 2 function to be able recollect some info after transformation. sql/sql_select.h: Prepare divided on 2 functions.
| * | | | | | | MWL#89 - Automatic merge with 5.3unknown2011-05-101-1/+1
| |\ \ \ \ \ \ \ | | |/ / / / / /
| | * | | | | | Fix LP BUG#715069unknown2011-04-201-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Analysis: The wrong result is a consquence of sorting the subquery result and then selecting only the first row due to the artificial LIMIT 1 introduced by the fix_fields phase. Normally, if there is an ORDER BY in a subquery, the ORDER is removed (Item_in_subselect::select_in_like_transformer), however if a GROUP BY is transformed into ORDER, this happens later, after the removal of the ORDER clause of subqueries, so we end up with a subquery with an ORDER clause, and an artificially added LIMIT 1. The reason why the same works in the main 5.3 without MWL#89, is that the 5.3 performs all subquery transformations, including IN->EXISTS before JOIN::optimize(). The beginning of JOIN::optimize does: if (having || (select_options & OPTION_FOUND_ROWS)) select_limit= HA_POS_ERROR; which sets the limit back to infinity, thus 5.3 sorts the whole subquery result, and IN performs the lookup into all subquery result rows. Solution: Sorting of subqueries without LIMIT is meaningless. Since LIMIT in subqueries is not supported, the patch removes sorting by setting join->skip_sort_order= true for each subquery JOIN object. This improves a number of execution plans to not perform unnecessary sorting at all.
| * | | | | | | Fixed LP bug #776295.Igor Babaev2011-05-041-0/+15
| |/ / / / / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If the value of the flag cond_false of an Item_equal object is true then the print method must return the string '0'.
| * | | | | | Merge.Igor Babaev2010-12-101-9/+9
| |\ \ \ \ \ \
| | * | | | | | Fixed LP bug #664594 and other bugs leading to invalid executionIgor Babaev2010-11-031-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | plans or wrong results due to the fact that JOIN_CACHE functions ignored the possibility of interleaving materialized semijoin tables with tables whose records were stored in join buffers. This fixes would become mostly unnecessary if the new code of mwl 90 was merged into 5.3 right now. Yet the fix the code of optimize_wo_join_buffering was needed in any case.
| | * | | | | | Merge 5.3-mwl128 -> 5.3Igor Babaev2010-10-271-5/+5
| | |\ \ \ \ \ \
| | | * | | | | | MWL#128: Added into EXPLAIN output info about types of the used join buffers andIgor Babaev2010-10-181-5/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | about the employed join algorithms. Refactored constructors of the JOIN_CACHE* classes.
| * | | | | | | | Merge with 5.1-release.Michael Widenius2010-12-061-0/+46
| |\ \ \ \ \ \ \ \ | | |/ / / / / / / | |/| | / / / / / | | | |/ / / / / | | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Fixed problem with oqgraph and 'make dist' Note that after this merge we have a problem show in join_outer where we examine too many rows in one specific case (related to BUG#57024). This will be fixed when mwl#128 is merged into 5.3.
* | | | | | | | 5.5-mergeSergei Golubchik2011-07-021-1/+60
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| * | | | | | | Bug#11829785 EXPLAIN EXTENDED CRASH WITH RIGHT OUTER JOIN, SUBQUERIESTor Didriksen2011-03-241-1/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a backport of Bug #46860 Crash/segfault using EXPLAIN EXTENDED on query using UNION in subquery. mysql-test/r/explain.result: Remove the extended Note, since explain returns error. New test case. mysql-test/r/func_gconcat.result: Remove the extended Note, since explain returns error. mysql-test/r/subselect3.result: Remove the extended Note, since explain returns error. mysql-test/t/explain.test: New test case. sql/sql_parse.cc: Skip the extended description if we have an error.
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