Question

In Oracle I have a stored procedure that queries a table and writes 2 fields into variables. Problem is Oracle will throw an error when nothing is returned. Here is my code

  SELECT COUNT (empno),Name
    INTO empcount,empname
    FROM lv_request_header
   WHERE empno = emp 
     AND request_id = rqid
   GROUP BY empname

Using NVL with a count still throws an error

ERROR at line 1: ORA-20000: lv_request_header not found ORA-06512: at line 13

Answer 1

The error you posted indicates that the problem is that the table lv_request_header does not exist or that the owner of the procedure does not have access to it. If a user other than the owner of the procedure owns this table, you likely need to qualify the table name with the schema name or to create a synonym for the object.

In general, if you want to deal with a SELECT ... INTO statement that returns 0 rows, you’d need to specify what values you want your two local variables to have in that case. If you want empcount to be 0 and empname to be NULL, you could do something like this

BEGIN
  SELECT COUNT (empno),Name
    INTO empcount,empname
    FROM lv_request_header
   WHERE empno = emp 
     AND request_id = rqid
   GROUP BY empname
EXCEPTION
  WHEN no_data_found
  THEN
    empcount := 0;
    empname  := NULL;
END;