[Maria-developers] MDEV-13417 / MDEV - 13418 The order of evaluation of SELECT..INTO assignments

Hello Sergei, Here is a patch for MDEV-13417 and MDEV-13418. Until you choose the right name for this new sql_mode, I temporarily chosen "SET_CONSISTENCY". It is set only for sql_mode=oracle for now. Can you review it ? Thank you. Regard.