在另一个存储过程中使用mysql存储过程的结果集

Question

I have a MYSQL stored procedure SP1() that returns a result set.

I want to call SP1() inside of SP2() and loop through the result set of SP1() to do some additional work.

I don't want to include my logic from SP1() because it would make SP2() too complicated.

Any suggestions?

Thanks.

Answer 1

What you want to do doesnt sound particularly good and maybe you should think about re-designing those 2 procs. However, you could do something like this as a quick fix:

get your sp2 sproc to write it's intermediate results to a temporary table which you can then access/process inside of sp1. You can then drop the temporary table which you created in sp2 once sp1 returns.

http://pastie.org/883881

delimiter ;
drop procedure if exists foo;
delimiter #

create procedure foo()
begin

  create temporary table tmp_users select * from users;

  -- do stuff with tmp_users

  call bar();

  drop temporary table if exists tmp_users;

end #

delimiter ;

drop procedure if exists bar;

delimiter #

create procedure bar()
begin
  -- do more stuff with tmp_users
  select * from tmp_users;
end #

delimiter ;

call foo();

not very elegant but should do the trick

Answer 2

Cursors would help solve the issue.

I am not sure if this is possible but make a cursor for select call for SP1() and iterate over them as usual cursor.