Commit 774a1955 authored by unknown's avatar unknown
Browse files

Bug#27127, Incorrect behaviour of timestamp column with DEFAULT CURRENT_TIMESTAMP 

correct the bitmap_set_bit when a field is timestamp and described 
with default CURRENT_TIMESTAMP or on update CURRENT_TIMESTAMP,
then it will reduce a little time cost when the field doesnot need 
to write.


sql/sql_update.cc:
  here table->timestamp_field represent only the timestamp field related to CURRENT_TIMESTAMP,
  when the timestamp_field_type is 0 or 1, it need not to write the field data further.
parent 7af5a3e9

sql/sql_update.cc

+4 −2
Original line number Diff line number Diff line
@@ -201,6 +201,8 @@ int mysql_update(THD *thd, 
      table->timestamp_field_type= TIMESTAMP_NO_AUTO_SET;

    else

    {

      if (table->timestamp_field_type == TIMESTAMP_AUTO_SET_ON_UPDATE ||

          table->timestamp_field_type == TIMESTAMP_AUTO_SET_ON_BOTH)

        bitmap_set_bit(table->write_set,

                       table->timestamp_field->field_index);

    }