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  1. 01 Jul, 2011 1 commit
    • Igor Babaev's avatar
      Fixed LP bug #803851. · 584954ab
      Igor Babaev authored
      The function generate_derived_keys_for_table should set the value of
      the number of keys for the derived table to 0 before it starts 
      generating key definitions for the table. It's important as the
      function can be called twice by the optimizer for a derived table
      if the query contains a subquery to which the IN-EXIST transformation
      is applicable.
      
      Fixed a valgrind complain.
      584954ab
  2. 30 Jun, 2011 1 commit
    • Igor Babaev's avatar
      Fixed LP bug #802845. · 55165f51
      Igor Babaev authored
      If the expression for a derived table contained a clause LIMIT 0
      SELECT from such derived table incorrectly returned a non-empty set.
      
      Fixed by ensuring JOIN::do_send_rows to be updated after the call
      of st_select_lex_unit::set_limit that sets the value of 
      JOIN::unit->select_limit_cnt.
      55165f51
  3. 29 Jun, 2011 3 commits
    • Igor Babaev's avatar
      Fixed LP bug #803410. · bd62c823
      Igor Babaev authored
      Due to this bug in the function generate_derived_keys_for_table some
      key definitions to access materialized derived tables or materialized
      views were constructed with invalid info for their key parts.
      This could make the server crash when it optimized queries using 
      materialized derived tables or materialized views. 
      bd62c823
    • Igor Babaev's avatar
      Merge. · a853c7dd
      Igor Babaev authored
      a853c7dd
    • Igor Babaev's avatar
      Fixed LP bug #802860. · 31edda66
      Igor Babaev authored
      This crashing bug could manifest itself at execution of join queries
      over materialized derived tables with IN subquery predicates in the
      where clause. If for such a query the optimizer chose to use duplicate
      weed-out with duplicates in a materialized derived table and chose to
      employ join cache the the execution could cause a crash of the server.
      It happened because the JOIN_CACHE::init method assumed  that the value
      of TABLE::file::ref is set at the moment when the method was called 
      for the employed join cache. It's true for regular tables, but it's 
      not true for materialized derived tables that are filled now at the
      first access to them, i.e. after the JOIN_CACHE::init has done its job.
      
      To fix this problem for any ROWID field of materialized derived table
      the procedure that copies fields from record buffers into the employed
      join buffer first checks whether the value of TABLE::file::ref has 
      been set for the table, and if it's not so the procedure sets this value.
      31edda66
  4. 28 Jun, 2011 4 commits
    • unknown's avatar
      Fixed bug lp:800679 · 78fa331e
      unknown authored
        
      Analysis:
        The failed assert ensured that the choice of subquery strategy
        is performed only for queries with at least one table. If there
        is a LIMIT 0 clause all tables are removed, and the subquery is
        neither optimized, nor executed during actual optimization. However,
        if the query is EXPLAIN-ed, the EXPLAIN execution path doesn't remove
        the query tables if there is a LIMIT 0 clause. As a result, the
        subquery optimization code is called, which violates the ASSERT
        condition.
        
      Solution:
        Transform the assert into a condition, and if the outer query
        has no tables assume that there will be at most one subquery
        execution.
        
        There is potentially a better solution by reengineering the
        EXPLAIN/optimize code, so that subquery optimization is not
        done if not needed. Such a solution would be a lot bigger and
        more complex than a bug fix.
      78fa331e
    • Sergey Petrunya's avatar
      BUG#751484: Valgrind warning / sporadic crash in evaluate_join_record... · 95cba104
      Sergey Petrunya authored
      BUG#751484: Valgrind warning / sporadic crash in evaluate_join_record sql_select.cc:14099 with semijoin
      - Added testcase. The bug is most likely fixed by MWL#90 code.
      95cba104
    • Igor Babaev's avatar
      Merge · 5ce5e8db
      Igor Babaev authored
      5ce5e8db
    • Igor Babaev's avatar
      Fixed LP bug #800535. · 9c4a3ced
      Igor Babaev authored
      The function create_view_field in some cases incorrectly set the maybe_null
      flag for the returned items.
      9c4a3ced
  5. 27 Jun, 2011 9 commits
    • Michael Widenius's avatar
      Automatic merge · 32b3272b
      Michael Widenius authored
      32b3272b
    • Michael Widenius's avatar
      Automatic merge · c7525961
      Michael Widenius authored
      c7525961
    • Sergey Petrunya's avatar
      Added TODO comments · 44806426
      Sergey Petrunya authored
      44806426
    • Michael Widenius's avatar
      Added mytop to distribution (with some small trivial changes to make it workg... · c785ed70
      Michael Widenius authored
      Added mytop to distribution (with some small trivial changes to make it workg good also for MariaDB)
      
      scripts/CMakeLists.txt:
        Added mytop
      scripts/Makefile.am:
        Added mytop
      scripts/make_binary_distribution.sh:
        Added mytop
      scripts/make_win_bin_dist:
        Added mytop
      scripts/mytop.sh:
        Added mytop (with some small trivial changes to make it workg good also for MariaDB)
      support-files/mysql.spec.sh:
        Added mytop
      c785ed70
    • Michael Widenius's avatar
      New status variables: Rows_tmp_read, Handler_tmp_update and Handler_tmp_write · ba9a890f
      Michael Widenius authored
      Split status variable Rows_read to Rows_read and Rows_tmp_read so that one can see how much real data is read.
      Same was done with with Handler_update and Handler_write.
      Fixed bug in MEMORY tables where some variables was counted twice.
      Added new internal handler call 'ha_close()' to have one place to gather statistics.
      Fixed bug where thd->open_options was set to wrong value when doing admin_recreate_table()
      
      
      mysql-test/r/status.result:
        Updated test results and added new tests
      mysql-test/r/status_user.result:
        Udated test results
      mysql-test/t/status.test:
        Added new test for temporary table status variables
      sql/ha_partition.cc:
        Changed to call ha_close() instead of close()
      sql/handler.cc:
        Added internal_tmp_table variable for easy checking of temporary tables.
        Added new internal handler call 'ha_close()' to have one place to gather statistics.
        Gather statistics for internal temporary tables.
      sql/handler.h:
        Added handler variables internal_tmp_table, rows_tmp_read.
        Split function update_index_statistics() to two.
        Added ha_update_tmp_row() for faster tmp table handling with more statistics.
      sql/item_sum.cc:
        ha_write_row() -> ha_write_tmp_row()
      sql/multi_range_read.cc:
        close() -> ha_close()
      sql/mysqld.cc:
        New status variables: Rows_tmp_read, Handler_tmp_update and Handler_tmp_write
      sql/opt_range.cc:
        close() -> ha_close()
      sql/sql_base.cc:
        close() -> ha_close()
      sql/sql_class.cc:
        Added handling of rows_tmp_read
      sql/sql_class.h:
        Added new satistics variables.
        rows_read++  ->  update_rows_read() to be able to correctly count reads to internal temp tables.
        Added handler::ha_update_tmp_row()
      sql/sql_connect.cc:
        Added comment
      sql/sql_expression_cache.cc:
        ha_write_row() -> ha_write_tmp_row()
      sql/sql_select.cc:
        close() -> ha_close()
        ha_update_row() -> ha_update_tmp_row()
      sql/sql_show.cc:
        ha_write_row() -> ha_write_tmp_row()
      sql/sql_table.cc:
        Fixed bug where thd->open_options was set to wrong value when doing admin_recreate_table()
      sql/sql_union.cc:
        ha_write_row() -> ha_write_tmp_row()
      sql/sql_update.cc:
        ha_write_row() -> ha_write_tmp_row()
      sql/table.cc:
        close() -> ha_close()
      storage/heap/ha_heap.cc:
        Removed double counting of statistic variables.
        close -> ha_close() to get tmp table statistics.
      storage/maria/ha_maria.cc:
        close -> ha_close() to get tmp table statistics.
      ba9a890f
    • Michael Widenius's avatar
      Updated version tag to beta · a6542a13
      Michael Widenius authored
      a6542a13
    • Michael Widenius's avatar
      Automatic merge · 2cfbfbac
      Michael Widenius authored
      2cfbfbac
    • Michael Widenius's avatar
      6b2438c0
    • Igor Babaev's avatar
      Fixed LP bug #801536. · cb164640
      Igor Babaev authored
      Ensured valid calculations of the estimates stored in JOIN_TAB::used_fieldlength.
      
      cb164640
  6. 25 Jun, 2011 3 commits
    • Igor Babaev's avatar
      Fixed LP bug #802023. · 77f8874c
      Igor Babaev authored
      Made mergeable views and mergeable derived tables transparent for
      the MIN/MAX optimization.
      77f8874c
    • Igor Babaev's avatar
      Added test cases for LP bug #798625 and LP bug #800085 · c6802021
      Igor Babaev authored
      fixed by the patch for LP bug 798621.
      c6802021
    • Igor Babaev's avatar
      Fixed LP bug #799499. · 37bac085
      Igor Babaev authored
      The following were missing in the patch for mwl106:
      - KEY_PART_INFO::fieldnr were not set for generated keys to access
        tmp tables storing the rows of materialized derived tables/views
      - TABLE_SHARE::column_bitmap_size was not set for tmp tables storing
        the rows of materialized derived tables/views.
      These could cause crashes or memory overwrite.
      
      37bac085
  7. 24 Jun, 2011 9 commits
    • Igor Babaev's avatar
      Fixed LP bug #798576. · fb22eb13
      Igor Babaev authored
      If a view/derived table is non-mergeable then the definition of the tmp table
      to store the rows for it is created at the prepare stage. In this case if the
      view definition uses outer joins and a view column belongs to an inner table
      of one of them then the column should be considered as nullable independently
      on nullability of the underlying column. If the underlying column happens to be
      defined as non-nullable then the function create_tmp_field_from_item rather 
      than the function create_tmp_field_from_field should be employed to create
      the definition of the interesting column in the tmp table.
       
      fb22eb13
    • Sergey Petrunya's avatar
      Merge 5.2 -> 5.3 · 7880039f
      Sergey Petrunya authored
      (testcase for #798597 now crashes)
      7880039f
    • Michael Widenius's avatar
      Automatic merge · 3d4e3472
      Michael Widenius authored
      3d4e3472
    • Michael Widenius's avatar
      Merge with 5.1 · 66b3e829
      Michael Widenius authored
      66b3e829
    • Michael Widenius's avatar
      Fixed several errors in Aria discovered by test case for lp:727869... · 424e9a88
      Michael Widenius authored
      Fixed several errors in Aria discovered by test case for lp:727869 ma_pagecache.c:2103: find_block: Assertion `block->rlocks == 0
      - Fixed assert in transaction log handler when aria_check was run on block-record table that was much bigger than expected.
      - Fixed warnings about wrong mutex order between bitmap and intern_lock
      - Fixed error in bitmap that could cause two rows to use same block for a block record.
      - Fixed wrong test that could cause error if last page for a bitmap was used by a blob.
      - Fixed several bugs in pagecache for the case where pagecase had very few blocks and there was a lot of threads competing to get the blocks (very unlikely case).
      
      
      mysql-test/suite/maria/r/maria-recovery3.result:
        Updated results
      sql/mysqld.cc:
        Allow mi_check() to send information messages for log file
      storage/maria/ma_bitmap.c:
        Fixed problem with wrong mutex order when bitmap was the first page that was flushed out of page cache
        - Fixed by introducing _ma_bitmap_mark_file_changed() that marks file changed without a bitmap lock.
        - Fixed one case in _ma_change_bitmap_page() where we didn't mark the bitmap changed. This could cause to rows to reuse same block if this was the only change to the bitmap.
        - Split _ma_bitmap_get_page_bits() in two parts to not take a bitmap lock when we already have it
        - Fixed bug in _ma_bitmap_set_full_page_bits() that caused an error if last page for a bitmap was used by a blob
      storage/maria/ma_check.c:
        Better handling of wrong file length.
        Fixed bug when we tried to write to transaction log when it was not opened (happened when block record file was bigger than expected)
      storage/maria/ma_pagecache.c:
        Fixed several bugs in pagecache for the case where pagecase had very few blocks and there was a lot of threads competing to get the blocks:
        - In link_block() mark a block given to another thread with PCBLOCK_REASSIGNED to ensure that no other threads can start re-using the block
          before the thread that requsted a block.
        - In free_block(), don't reset status for a block that is in re-assign by link_block() (we don't want to loose the PCBLOCK_REASSIGNED flag).
        - Added call to wait_for_flush() when we got a new block in find_block() to ensure that we don't use a block that is beeing flushed by another thread.
        - Moved setting of hits_left and last_hit_time in find_block() to where we assign the block.
        
        
        Code cleanup and making code uniform:
        - Changed a lot of KEYCACHE_DBUG_PRINT to use DBUG_PRINT
        - Streamlined all reporting of 'signal' and 'wait' between threads to be identical.
        - Use thread name instead of thread number (for each match against --debug)
        - Added more DBUG_ENTER, DBUG_PRINT and DBUG_ASSERT()
        - Added more comments
      storage/myisam/ha_myisam.cc:
        Only print information about that we make a backup if we are really making a backup.
      storage/myisam/mi_check.c:
        Inform mysqld that we are creating a backup of the data file (for inclusion in error log).
      424e9a88
    • Michael Widenius's avatar
    • Michael Widenius's avatar
      Fixes to aria · 5407f511
      Michael Widenius authored
      - Fixed error when writing a blob to the last page on the bitmap.
      - Marked bitmap changed in once case that could cause two rows to use the same blob page.
      5407f511
    • Michael Widenius's avatar
      Fix for bug lp:798597 Incorrect "Duplicate entry" error with views and GROUP BY · 6a9ac86c
      Michael Widenius authored
      mysql-test/r/join.result:
        Test case for LP:798597
      mysql-test/t/join.test:
        Test case for LP:798597
      sql/sql_select.cc:
        In simplify_joins we reset table->maybe_null for outer join tables that can't ever be NULL.
        This caused a conflict between the previously calculated items and the group_buffer against the fields
        in the temporary table that are created as not null thanks to the optimization.
        The fix is to correct the group by items to also be not_null so that they match the used fields and keys.
      6a9ac86c
    • Igor Babaev's avatar
      Fixed a valgrind problem. · d6b0767c
      Igor Babaev authored
      The function setup_tables should handle table_list elements for
      semijoin materialized tables in a special way when executing
      a prepared statement for the second time.
      d6b0767c
  8. 23 Jun, 2011 1 commit
    • Igor Babaev's avatar
      Fixed LP bug #800518. · 3cf0d6f4
      Igor Babaev authored
      The function simple_pred did not take into account that a multiple equality
      could include ref items (more exactly items of the class Item_direct_view_ref).
      It caused crashes for queries over derived tables or views if the
      min/max optimization could be applied to these queries.
      3cf0d6f4
  9. 22 Jun, 2011 2 commits
    • Igor Babaev's avatar
      Merge · 1f6b32bc
      Igor Babaev authored
      1f6b32bc
    • Igor Babaev's avatar
      Fixed LP bug #798621. · e7578ac6
      Igor Babaev authored
      The patch for bugs 717577 and 724942 has missed to make adjustments for the
      call item_equal->add_const(const_item, orig_field_item) in the function
      check_simple_equality that builds multiple equality for a field and a constant.
      As a result, when this field happens to be a view field and the corresponding
      Item_field object F is wrapped in an Item_direct_view_ref object R the object
      F is placed in the multiple equality instead of the object R.
      A substitution of an equal item for F potentially can cause very serious
      problems and in some cases can lead to crashes of the server.
      e7578ac6
  10. 21 Jun, 2011 4 commits
    • unknown's avatar
      MWL#89 · e1d734f3
      unknown authored
      Removed forgotten EXPLAIN EXTENDED from the test file.
      e1d734f3
    • Sergei Golubchik's avatar
      lp:790513 MariaDB crashes on startup · 135ce0ba
      Sergei Golubchik authored
      initialize plugins earlier, to support, for example, non-MyISAM mysql.plugin table.
      135ce0ba
    • unknown's avatar
      MWL#89 · 44570d2b
      unknown authored
      Automerged with 5.3.
      44570d2b
    • unknown's avatar
      MWL#89 · a02682ab
      unknown authored
      - Added regression test with queries over the WORLD database.
      - Discovered and fixed several bugs in the related cost calculation
        functionality both in the semijoin and non-semijon subquery code.
      - Added DBUG printing of the cost variables used to decide between
        IN-EXISTS and MATERIALIZATION.
      a02682ab
  11. 17 Jun, 2011 3 commits