Question

In a MySQL procedure, I want to set current_timestamp+0 to a variable and use this variable in queries.

Edited:
I need @P_version to stay the same value during the whole procedure. I would like to get the current timestamp at the begining and use this value in all the queries.

I tried:

BEGIN
    DECLARE P_version float;
    SET P_version = current_timestamp +0;

    insert INTO reports_4.Items(id, version, itype)
    Select I.id, P_version, I.itype from Items where I.live = 1;
    .....
END;

And:

    BEGIN
      BEGIN
        SET @P_version = 'select current_timestamp +0 from dual';
            PREPARE query from @P_version;
            EXECUTE query;
            DEALLOCATE prepare query;
        END;    
      insert INTO reports_4.Items(id, version, itype)
      Select I.id, P_version, I.itype from Items where I.live = 1;
      .....
END;

If I use the following, when I call my procedure a second time the value of @P_version has the same value that the first time I ran the procedure.

BEGIN
  select @P_version = current_timestamp +0 from dual;

  insert INTO reports_4.Items(id, version, itype)
  Select I.id, @P_version, I.itype from Items where I.live = 1;
  .....
END;

Do you have an idea?

Answer 1

set @p = now();? mysql doesn’t require selecting from dual for this sort of thing.