- 25 Mar, 2012 1 commit
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Sergey Petrunya authored
- The problem was that = we've picked a LooseScan that used full index scan (tab->type==JT_ALL) on certain index. = there was also a quick select (tab->quick!=NULL), that used other indexes. = some old code assumes that (tab->type==JT_ALL && tab->quick) -> means that the quick select should be used, which is not true. Fixed by discarding the quick select as soon as we know we're using LooseScan without using the quick select.
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- 24 Mar, 2012 1 commit
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unknown authored
Improve filesort performance for small sorts: Don't write pointers to records that we will never use.
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- 23 Mar, 2012 4 commits
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Michael Widenius authored
- Don't call update_virtual_fields() if table->vfield is not set - Don't prealloc memory for in open_tables() as this is very seldom used. sql/records.cc: Don't call update_virtual_fields() if table->vfield is not set sql/sql_base.cc: Don't prealloc memory for in open_tables() as this is very seldom used. Don't call update_virtual_fields() if table->vfield is not set sql/sql_delete.cc: Don't call update_virtual_fields() if table->vfield is not set sql/sql_handler.cc: Don't call update_virtual_fields() if table->vfield is not set sql/sql_join_cache.cc: Don't call update_virtual_fields() if table->vfield is not set Move some frequent values to local variables sql/sql_table.cc: Don't call update_virtual_fields() if table->vfield is not set sql/sql_update.cc: Don't call update_virtual_fields() if table->vfield is not set sql/table.cc: Assert if update_virtual_fields is called with wrong parameters
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Michael Widenius authored
- Remove all references of MAX_TABLES from JOIN struct and make these dynamic - Updated Join_plan_state to allocate just as many elements as it's needed sql/opt_subselect.cc: Optimized version of Join_plan_state sql/sql_select.cc: Set join->positions and join->best_positions dynamicly Don't call update_virtual_fields() if table->vfield is not set. sql/sql_select.h: Remove all references of MAX_TABLES from JOIN struct and Join_plan_state and make these dynamic
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Michael Widenius authored
- Optimize away calls to hp_rec_hashnr() by cashing hash - Try to get more rows / block (to minimize overhead of HP_PTRS) in HEAP tables. storage/heap/_check.c: Optimize away calls to hp_rec_hashnr() by cashing hash. Print cleanups storage/heap/heapdef.h: Added place to hold calculated hash value for row storage/heap/hp_create.c: Try to get more rows / block (to minimize overhead of HP_PTRS) storage/heap/hp_delete.c: Optimize away calls to hp_rec_hashnr() by cashing hash. storage/heap/hp_hash.c: Optimize away calls to hp_rec_hashnr() by cashing hash. Remove some not needed DBUG_PRINT storage/heap/hp_test2.c: Increased max table size as now heap tables takes a bit more space (a few %) storage/heap/hp_write.c: Optimize away calls to hp_rec_hashnr() by cashing hash. Remove duplicated code More DBUG_PRINT storage/maria/ma_create.c: More DBUG_PRINT
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Igor Babaev authored
If the first component of a ref key happened to be a constant appeared after constant row substitution then no store_key element should be created for such a component. Yet create_ref_for_key() erroneously could create such an element that caused construction of invalid ref keys and wrong results for some joins.
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- 22 Mar, 2012 2 commits
- 21 Mar, 2012 6 commits
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Sergei Golubchik authored
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Sergei Golubchik authored
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Sergei Golubchik authored
lp:933959 Assertion `0' failed in net_end_statement(THD*) on concurrent SELECT FROM I_S.INNODB_SYS_INDEXES and ALTER TABLE Workaround: report a generic error if an I_S plugin failed silently.
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Sergei Golubchik authored
mark the corresponding I_S table as OPTIMIZE_I_S_TABLE, to let the I_S optimizer figure out whether files need to be opened, and don't open the tables unless I_S optimizer says so.
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Sergey Petrunya authored
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Igor Babaev authored
This bug in the constructor SEL_IMERGE::SEL_IMERGE could cause huge excessive memory requests.
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- 18 Mar, 2012 2 commits
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Sergey Petrunya authored
- Take into account that there may exist Item_field objects with context==NULL.
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Sergey Petrunya authored
BUG#952372: Server crashes on 2nd execution of PS in find_field_in_tables with semijoin+materialization - The problem was that convert_subq_to_jtbm() attached the semi-join TABLE_LIST object into the wrong list: they used to attach it to the end of parent_lex->leaf_tables.head()->next_local->...->next_local. This was apparently inccorect, as one can construct an example where JTBM nest is attached to a table that is inside some mergeable VIEW, which breaks (causes crash) for name resolution on the subsequent statement re-execution. - Solution: Attach to the "right" list. The "wording" was copied from st_select_lex::handle_derived.
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- 15 Mar, 2012 1 commit
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Vladislav Vaintroub authored
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- 14 Mar, 2012 3 commits
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Sergei Golubchik authored
use vsnprintf() use write() on windows, not WriteFile or fwrite() localtime_r is still a problem
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unknown authored
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unknown authored
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- 13 Mar, 2012 3 commits
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Igor Babaev authored
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Igor Babaev authored
Do not call, directly or indirectly, SQL_SELECT::test_quick_select() for derived materialized tables / views when optimizing joins referring to these tables / views to get cost estimates of materialization. The current code does not create B-tree indexes for materialized derived tables / views. So now it's not possible to get any estimates for ranges conditions over the results of the materialization. The function mysql_derived_create() must take into account the fact that array of the KEY structures specifying the keys over a derived table / view may be moved after the optimization phase if the derived table / view is materialized.
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Michael Widenius authored
Added 'from_end' as extra parameter to Field::unpack() to detect wrong from data. Change ha_archive::unpack_row() to detect wrong field lengths. Replication code changed to detect wrong field information in events. mysql-test/r/archive.result: dded test case for lp:917689 sql/field.cc: Added 'from_end' as extra parameter to Field::unpack() to detect wrong from data. Removed not used 'unpack_key' functions. sql/field.h: Added 'from_end' as extra parameter to Field::unpack() to detect wrong from data. Removed not used 'unpack_key' functions. Removed some not needed unpack() functions. sql/filesort.cc: Added buffer end parameter to unpack_addon_fields() sql/log_event.h: Added end of buffer argument to unpack_row() sql/log_event_old.cc: Added end of buffer argument to unpack_row() sql/log_event_old.h: Added end of buffer argument to unpack_row() sql/records.cc: Added buffer end parameter to unpack_addon_fields() sql/rpl_record.cc: Added end of buffer argument to unpack_row() Added detection of wrong field information in events sql/rpl_record.h: Added end of buffer argument to unpack_row() sql/rpl_record_old.cc: Added end of buffer argument to unpack_row() Added detection of wrong field information in events sql/rpl_record_old.h: Added end of buffer argument to unpack_row() sql/table.h: Added buffer end parameter to unpack() storage/archive/ha_archive.cc: Change ha_archive::unpack_row() to detect wrong field lengths. This fixes lp:917689
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- 12 Mar, 2012 7 commits
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Sergey Petrunya authored
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Sergey Petrunya authored
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Sergey Petrunya authored
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Sergey Petrunya authored
- The bug would show up - when using PS (so that we get re-execution) - the left_expr of the subquery is a reference to viewname.column_name, so that it crashes when one tries to use it without having called fix_fields for it. - when using SJ-Materialization, which makes use of sj_subq_pred->left_expr expression - The fix is to have setup_conds() fix sj_subq_pred->left_expr for semi-join nests it finds.
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Vladislav Vaintroub authored
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Vladislav Vaintroub authored
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Vladislav Vaintroub authored
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- 09 Mar, 2012 4 commits
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Igor Babaev authored
This bug was introduced into mariadb 5.2 in the December 2010 with the patch that added a new engine property: the ability to support virtual columns. As a result of this bug the information from frm files for tables that contained virtual columns did not appear in the information schema tables.
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Michael Widenius authored
Added test case for lp:905782 "Assertion `pageno < ((1ULL) << 40)' failed at ma_pagecache.c:3438: pagecache_read or table corruption on INSERT into a ucs2 table" The orignal bug has been fixed earlier
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unknown authored
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Igor Babaev authored
If in the where clause of the a query some comparison conditions on the field under a MIN/MAX aggregate function contained constants whose sizes exceeded the size of the field then the query could return a wrong result when the optimizer had chosen to apply the MIN/MAX optimization. With such conditions the MIN/MAX optimization still could be applied, yet it would require a more thorough analysis of the keys built to find the value of MIN/MAX aggregate functions with index look-ups. The current patch just prohibits using the MIN/MAX optimization in this situation.
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- 06 Mar, 2012 4 commits
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Igor Babaev authored
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Igor Babaev authored
The function create_hj_key_for_table() that builds the descriptor of the hash join key to access a table of a materialized subquery must ignore any equi-join predicate depending on the tables not belonging to the subquery.
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Vladislav Vaintroub authored
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Vladislav Vaintroub authored
Fixed detection of installed HeidiSQL in the machine, prevent installing own copy if HeidiSQL is already installed. On deinstallation, do not remove settings if official HeidiSQL is detected.
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- 05 Mar, 2012 2 commits
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Michael Widenius authored
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Michael Widenius authored
This is needed as last log entry may be a DDL that is not processed and then a table may be left in 'not properly closed state' even if information is correct in it.
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