• unknown's avatar
    Bug#19978: INSERT .. ON DUPLICATE erroneously reports some records were · 976f0a39
    unknown authored
    updated.
    
    INSERT ... ON DUPLICATE KEY UPDATE reports that a record was updated when
    the duplicate key occurs even if the record wasn't actually changed
    because the update values are the same as those in the record.
    
    Now the compare_record() function is used to check whether the record was
    changed and the update of a record reported only if the record differs
    from the original one.
    
    
    sql/sql_update.cc:
      Bug#19978: INSERT .. ON DUPLICATE erroneously reports some records were
      updated.
      The compare_record() function was changed to non-static one.
    sql/sql_insert.cc:
      Bug#19978: INSERT .. ON DUPLICATE erroneously reports some records were
      updated.
      Now the compare_record() function is used to check whether the record was
      changed and the update of a record reported only if the record differs
      from the original one.
    sql/mysql_priv.h:
      Bug#19978: INSERT .. ON DUPLICATE erroneously reports some records were
      updated.
      Added the prototype of the compare_record() function.
    mysql-test/t/insert_select.test:
      Added a test case for bug#19978: INSERT .. ON DUPLICATE erroneously reports
      some records were updated.
    mysql-test/r/insert_select.result:
      Added a test case for bug#19978: INSERT .. ON DUPLICATE erroneously reports
      some records were updated.
    976f0a39
insert_select.result 10.5 KB