1. 14 Nov, 2007 3 commits
  2. 12 Nov, 2007 2 commits
    • anozdrin/alik@station.'s avatar
      A patch for BUG#32172: information_schema test fails with · 99d33cd6
      anozdrin/alik@station. authored
      wait_condition timeout.
      
      The problem was that the event thread didn't manage to execute
      the event in 30 seconds on highly-loaded box. The fix is to
      increase timeout.
      
      This is a fix for the test suite.
      99d33cd6
    • anozdrin/alik@station.'s avatar
      Fix for a BUG#31898: 16M memory allocations for user variables · 5f33524d
      anozdrin/alik@station. authored
      in stored procedure.
      
      The problem was that MySQL used unnecessarily large amounts of
      memory if user variables were used as an argument to CONCAT or
      CONCAT_WS -- 16M per each user variable used.
      
      Technically, it happened because MySQL used the following
      allocation strategy for string functions to avoid multiple
      realloc() calls: in the virtual operation fix_length_and_dec()
      the attribute max_length was calculated as a sum of max_length
      values for each argument.
      
      Although this approach worked well for small (or fixed) data types,
      there could be a problem if there as a user variable among
      the arguments of a string function -- max_length of the function
      would be 16M (as the max_length of a user variable is 16M).
      
      Both CONCAT() and CONCAT_WS() functions suffer from this problem.
      
      The fix is to do not use meta-data for allocating memory.
      The following strategy is proposed instead: allocate the exact
      length of the result string at the first record, double the amount
      of memory allocated when it is required.
      
      No test case for this bug because there is no way to test memory
      consumption in a robust way with our test suite.
      5f33524d
  3. 06 Nov, 2007 2 commits
  4. 05 Nov, 2007 5 commits
  5. 02 Nov, 2007 4 commits
  6. 01 Nov, 2007 22 commits
  7. 31 Oct, 2007 2 commits