Executing a merge query for a collection

Question

Hello All,
I am trying to use a merge query to find common and uncommon ids between a table and a list I pass to my pl-sql proc. I am not sure if I am doing the right thing, please guide me...
Here is my code...
Procedure process_content(i_eidlist IN ocs_eid_list_t, i_id IN number, o_new_email_list OUT ocs_eid_list_t) AS
lv_last_processed_row_id number;
lv_common_email_list ocs_eid_list_t;
lv_internet_id varchar2;
Begin
lv_last_processed_row_id := 0;
MERGE INTO table c
USING TABLE(i_eidlist)a
ON (c.eid in a)
--WHEN MATCHED THEN UPDATE SET c.row_id = job_no_seq.NEXTVAL,c.copy_count=1 returning row_id bulk collect into lv_row_id_list;
WHEN MATCHED THEN SELECT c.eid bulk collect into lv_common_email_list returning row_id bulk collect into lv_row_id_list
WHEN NOT MATCHED THEN SELECT c.eid bulk collect into o_new_email_list;
I am assuming that the merge query is going to iterate over the i_eidlist, and find me the common and uncommon elements. However, I get an error saying the sql block is ignored.
Thanks
Abhishek
글 수정: A.J.

Answer 1

I do not think it is possible in one pass. The best I could come up with:
DECLARE
    COMMON_LIST NAME_LIST;
    UNCOMMON_LIST NAME_LIST;
    EMPLOYEE_LIST NAME_LIST;
    CHECK_LIST NAME_LIST := NAME_LIST('KING','QUEEN');
BEGIN
    SELECT  ENAME
      BULK COLLECT INTO EMPLOYEE_LIST
      FROM  EMP;
    COMMON_LIST := EMPLOYEE_LIST MULTISET INTERSECT CHECK_LIST;
    UNCOMMON_LIST := EMPLOYEE_LIST MULTISET EXCEPT CHECK_LIST;
DBMS_OUTPUT.PUT_LINE('-- COMMON_LIST --');
FOR i IN 1..COMMON_LIST.COUNT LOOP
  DBMS_OUTPUT.PUT_LINE(COMMON_LIST(i));
END LOOP;
DBMS_OUTPUT.PUT_LINE('-- UNCOMMON_LIST --');
FOR i IN 1..UNCOMMON_LIST.COUNT LOOP
  DBMS_OUTPUT.PUT_LINE(UNCOMMON_LIST(i));
END LOOP;
END;
/Run results showing contents:
SQL> DECLARE
  2      COMMON_LIST NAME_LIST;
  3      UNCOMMON_LIST NAME_LIST;
  4      EMPLOYEE_LIST NAME_LIST;
  5      CHECK_LIST NAME_LIST := NAME_LIST('KING','QUEEN');
  6  BEGIN
  7      SELECT  ENAME
  8        BULK COLLECT INTO EMPLOYEE_LIST
  9        FROM  EMP;
10      COMMON_LIST := EMPLOYEE_LIST MULTISET INTERSECT CHECK_LIST;
11      UNCOMMON_LIST := EMPLOYEE_LIST MULTISET EXCEPT CHECK_LIST;
12  DBMS_OUTPUT.PUT_LINE('-- COMMON_LIST --');
13  FOR i IN 1..COMMON_LIST.COUNT LOOP
14    DBMS_OUTPUT.PUT_LINE(COMMON_LIST(i));
15  END LOOP;
16  DBMS_OUTPUT.PUT_LINE('-- UNCOMMON_LIST --');
17  FOR i IN 1..UNCOMMON_LIST.COUNT LOOP
18    DBMS_OUTPUT.PUT_LINE(UNCOMMON_LIST(i));
19  END LOOP;
20  END;
21  /
-- COMMON_LIST --
KING
-- UNCOMMON_LIST --
SMITH
ALLEN
WARD
JONES
MARTIN
BLAKE
CLARK
SCOTT
TURNER
ADAMS
JAMES
FORD
MILLER
PL/SQL procedure successfully completed.
SQL> SY.