• Ramil Kalimullin's avatar
    Fix for bug#52397: another crash with explain extended and group_concat · 55852670
    Ramil Kalimullin authored
    Problem: EXPLAIN EXTENDED was trying to resolve references to 
    freed temporary table fields for GROUP_CONCAT()'s ORDER BY arguments.
    
    Fix: use stored original GROUP_CONCAT()'s arguments in such a case.
    
    
    mysql-test/r/func_gconcat.result:
      Fix for bug#52397: another crash with explain extended and group_concat
        - test result.
    mysql-test/t/func_gconcat.test:
      Fix for bug#52397: another crash with explain extended and group_concat
        - test case.
    sql/item_sum.cc:
      Fix for bug#52397: another crash with explain extended and group_concat
        - use "pargs", printing ORDER BY arguments in the 
      Item_func_group_concat::print() instead of "order" to avoid
      possible reference resolving to (freed) temporary table fields.
    55852670
item_sum.cc 85.6 KB