1. 11 Jul, 2006 2 commits
  2. 10 Jul, 2006 4 commits
    • unknown's avatar
      Merge epotemkin@bk-internal.mysql.com:/home/bk/mysql-4.1-opt · 7bea031d
      unknown authored
      into  moonbone.local:/work/allany-4.1-mysql
      
      
      7bea031d
    • unknown's avatar
      Fixed bug#16302: Quantified subquery without any tables gives wrong results · ad88eabd
      unknown authored
      The ALL/ANY subqueries are the subject of MIN/MAX optimization. The matter
      of this optimization is to embed MIN() or MAX() function into the subquery
      in order to get only one row by which we can tell whether the expression
      with ALL/ANY subquery is true or false.
      But when it is applied to a subquery like 'select a_constant' the reported bug
      occurs. As no tables are specified in the subquery the do_select() function 
      isn't called for the optimized subquery and thus no values have been added 
      to a MIN()/MAX() function and it returns NULL instead of a_constant.
      This leads to a wrong query result.
      
      For the subquery like 'select a_constant' there is no reason to apply
      MIN/MAX optimization because the subquery anyway will return at most one row.
      Thus the Item_maxmin_subselect class is more appropriate for handling such
      subqueries.
      
      The Item_in_subselect::single_value_transformer() function now checks
      whether tables are specified for the subquery. If no then this subselect is
      handled like a UNION using an Item_maxmin_subselect object.
      
      
      mysql-test/t/subselect.test:
        Added test case for bug#16302: Quantified subquery without any tables gives wrong results
      mysql-test/r/subselect.result:
        Added test case for bug#16302: Quantified subquery without any tables gives wrong results
      sql/item_subselect.cc:
        Fixed bug#16302: Quantified subquery without any tables gives wrong results
         
        The Item_in_subselect::single_value_transformer() function now checks
        whether tables are specified for the subquery. If no then this subselect is
        handled like a UNION using an Item_maxmin_subselect object.
      ad88eabd
    • unknown's avatar
      Merge rakia:mysql/4.1/B14553 · ca1e4aab
      unknown authored
      into  macbook.gmz:/Users/kgeorge/mysql/work/B14553-4.1-opt
      
      
      sql/sql_class.cc:
        SCCS merged
      sql/sql_select.cc:
        SCCS merged
      ca1e4aab
    • unknown's avatar
      BUG#14553: NULL in WHERE resets LAST_INSERT_ID · 0806d9a8
      unknown authored
      To make MySQL compatible with some ODBC applications, you can find
      the AUTO_INCREMENT value for the last inserted row with the following query:
       SELECT * FROM tbl_name WHERE auto_col IS NULL.
      This is done with a special code that replaces 'auto_col IS NULL' with
      'auto_col = LAST_INSERT_ID'.
      However this also resets the LAST_INSERT_ID to 0 as it uses it for a flag
      so as to ensure that only the first SELECT ... WHERE auto_col IS NULL
      after an INSERT has this special behaviour.
      In order to avoid resetting the LAST_INSERT_ID a special flag is introduced
      in the THD class. This flag is used to restrict the second and subsequent
      SELECTs instead of LAST_INSERT_ID.
      
      
      mysql-test/r/odbc.result:
        test suite for the bug
      mysql-test/r/rpl_insert_id.result:
        test for the fix in replication
      mysql-test/t/odbc.test:
        test suite for the bug
      mysql-test/t/rpl_insert_id.test:
        test for the fix in replication
      sql/sql_class.cc:
        initialize the flag
      sql/sql_class.h:
        flag's declaration and set code when setting the last_insert_id
      sql/sql_select.cc:
        the special flag is used instead of last_insert_id
      0806d9a8
  3. 06 Jul, 2006 2 commits
    • unknown's avatar
      Merge ibabaev@bk-internal.mysql.com:/home/bk/mysql-4.1-opt · 8cb368bc
      unknown authored
      into  olga.mysql.com:/home/igor/mysql-4.1-opt
      
      
      8cb368bc
    • unknown's avatar
      Fixed bug #18243. · cf7627bc
      unknown authored
      The implementation of the method Item_func_reverse::val_str
      for the REVERSE function modified the argument of the function.
      This led to wrong results for expressions that contained
      REVERSE(ref) if ref occurred somewhere else in the expressions.
      
      
      mysql-test/r/func_str.result:
        Added a test case for bug #18243.
      mysql-test/t/func_str.test:
        Added a test case for bug #18243.
      sql/item_strfunc.cc:
        Fixed bug #18243.
        The implementation of the method Item_func_reverse::val_str
        for the REVERSE function modified the argument of the function.
        This led to wrong results for expressions that contained
        REVERSE(ref) if ref occurred somewhere else in the expressions.
        
        The implementation of Item_func_reverse::val_str has been changed
        to make the argument intact.
      sql/item_strfunc.h:
        Fixed bug #18243.
        Added tmp_value to the Item_func_reverse class to store
        the result of the function. It erroneously replaced the 
        argument before this fix.
      cf7627bc
  4. 05 Jul, 2006 1 commit
  5. 04 Jul, 2006 2 commits
    • unknown's avatar
      WL#2928 Date Translation NRE · 184ff212
      unknown authored
      (implemented by by Josh Chamas)
      
      
      libmysqld/Makefile.am:
        Adding new source file
      mysql-test/r/date_formats.result:
        Adding test case
      mysql-test/t/date_formats.test:
        Adding test case
      sql/Makefile.am:
        Adding new source file
      BitKeeper/etc/ignore:
        Added libmysqld/sql_locale.cc to the ignore list
      sql/item_timefunc.cc:
        Using current locale data, instead of hard coded English names.
      sql/mysql_priv.h:
        Adding new type MY_LOCALE, and declaring new global variables.
      sql/set_var.cc:
        Adding "lc_time_names" system variable.
      sql/set_var.h:
        Adding "lc_time_names" system variable.
      sql/sql_cache.cc:
        Adding lc_time_names as a query cache flag.
      sql/sql_class.cc:
        Setting default locale to en_US
      sql/sql_class.h:
        Adding locale variable into system_variables.
      sql/sql_locale.cc:
        Adding new file with locale data for various languages
      184ff212
    • unknown's avatar
      Better comments for void Item::top_level_item() · 1401c2c7
      unknown authored
      1401c2c7
  6. 30 Jun, 2006 14 commits
  7. 29 Jun, 2006 9 commits
  8. 28 Jun, 2006 3 commits
  9. 27 Jun, 2006 3 commits