1. 16 Jun, 2006 2 commits
  2. 15 Jun, 2006 4 commits
  3. 14 Jun, 2006 12 commits
  4. 13 Jun, 2006 3 commits
    • evgen@moonbone.local's avatar
      Merge epotemkin@bk-internal.mysql.com:/home/bk/mysql-4.1-opt · 111dc927
      evgen@moonbone.local authored
      into moonbone.local:/home/evgen/bk-trees/mysql-4.1-opt
      111dc927
    • evgen@moonbone.local's avatar
      Merge epotemkin@bk-internal.mysql.com:/home/bk/mysql-4.1-opt · d4942a26
      evgen@moonbone.local authored
      into moonbone.local:/work/16377-bug-4.1-opt-mysql
      d4942a26
    • evgen@moonbone.local's avatar
      Fixed bug#16377: result of DATE/TIME functions were compared as strings which · 67de8c46
      evgen@moonbone.local authored
      can lead to a wrong result.
      
      All date/time functions has the STRING result type thus their results are
      compared as strings. The string date representation allows a user to skip 
      some of leading zeros. This can lead to wrong comparison result if a date/time 
      function result is compared to such a string constant.
      
      The idea behind this bug fix is to compare results of date/time functions
      and data/time constants as ints, because that date/time representation is 
      more exact. To achieve this the agg_cmp_type() is changed to take in the
      account that a date/time field or an date/time item should be compared 
      as ints.
      
      This bug fix is partially back ported from 5.0.
      
      The agg_cmp_type() function now accepts THD as one of parameters. 
      In addition, it now checks if a date/time field/function is present in the
      list. If so, it tries to coerce all constants to INT to make date/time
      comparison return correct result. The field for the constant coercion is
      taken from the Item_field or constructed from the Item_func. In latter case
      the constructed field will be freed after conversion of all constant items.
      Otherwise the result is same as before - aggregated with help of the
      item_cmp_type() function.
      
      From the Item_func_between::fix_length_and_dec() function removed the part
      which was converting date/time constants to int if possible. Now this is 
      done by the agg_cmp_type() function.
      
      The new function result_as_longlong() is added to the Item class. 
      It indicates that the item is a date/time item and result of it can be
      compared as int. Such items are date/time fields/functions.
      
      Correct val_int() methods are implemented for classes Item_date_typecast, 
      Item_func_makedate, Item_time_typecast, Item_datetime_typecast. All these
      classes are derived from Item_str_func and Item_str_func::val_int() converts
      its string value to int without regard to the date/time type of these items.
      
      Arg_comparator::set_compare_func() and Arg_comparator::set_cmp_func()
      functions are changed to substitute result type of an item with the INT_RESULT
      if the item is a date/time item and another item is a constant. This is done
      to get a correct result of comparisons like date_time_function() = string_constant.
      67de8c46
  5. 12 Jun, 2006 9 commits
  6. 09 Jun, 2006 2 commits
  7. 08 Jun, 2006 5 commits
  8. 07 Jun, 2006 2 commits
  9. 06 Jun, 2006 1 commit