MySQL save results of EXECUTE in a variable?

Question

How do I save the results of EXECUTE statement to a variable? Something like

SET a = (EXECUTE stmtl); 

Answer 1

If you want to do this with a prepared statement, then you need to include the variable assignment in the original statement declaration.

If you want to use a stored routine it's easier. You can assign the return value of a stored function directly to a variable, and stored procedures support out parameters.

Examples:

Prepared Statement:

PREPARE square_stmt from 'select pow(?,2) into @outvar'; set @invar = 1; execute square_stmt using @invar; select @outvar; +---------+ | @outvar | +---------+ |       1 | +---------+ DEALLOCATE PREPARE square_stmt; 

Stored Function:

delimiter $$ create function square_func(p_input int) returns int begin   return pow(p_input,2); end $$ delimiter ;  set @outvar = square_func(2); select @outvar; +---------+ | @outvar | +---------+ |       4 | +---------+ 

Stored Procedure:

delimiter $$ create procedure square_proc(p_input int, p_output int) begin   set p_output = pow(p_input,2); end $$ delimiter ;  set @outvar = square_func(3); call square_proc(2,@outvar); select @outvar; +---------+ | @outvar | +---------+ |       9 | +---------+