• unknown's avatar
    Fix for bug #31349: ERROR 1062 (23000): Duplicate entry '' for key 'group_key' · 426b551b
    unknown authored
    Problem: lying to the optimizer that a function (Item_func_inet_ntoa)
    cannot return NULL values leads to unexpected results (in the case group
    keys creation/comparison is broken). 
    
    Fix: Item_func_inet_ntoa::maybe_null should be set properly.
    
    
    mysql-test/r/func_misc.result:
      Fix for bug #31349: ERROR 1062 (23000): Duplicate entry '' for key 'group_key'
        - test result.
    mysql-test/t/func_misc.test:
      Fix for bug #31349: ERROR 1062 (23000): Duplicate entry '' for key 'group_key'
        - test case.
    sql/item_strfunc.h:
      Fix for bug #31349: ERROR 1062 (23000): Duplicate entry '' for key 'group_key'
        - set Item_func_inet_ntoa::maybe_null flag.
    426b551b
item_strfunc.h 22.7 KB