MySQL使用concat的Alter表

Question

These SQLs should be give same result? Second one gives an error (SQL Error 1064).

Correct :          ALTER TABLE table1 TRUNCATE PARTITION d20; 
Does not work   :  ALTER TABLE table1 TRUNCATE PARTITION concat('d', '20');

Actually I stuck on truncate table with respect to day of month, (ie today is 25th) execute

i was planned sql like below, but does not work

ALTER TABLE table1 TRUNCATE PARTITION DAYOFMONTH(now());

Answer 1

No, they shouldn't. TRUNCATE PARTITION accepts a partition name, which is not a string.

UPD :

You still can create and perform dynamic sql queries using PREPARE + EXECUTE