Sequence next value into a VIEW

Question

Hi all,
I am getting this error when i try to include sequence value in aview....
please suggest where i am doing wrong or if there is any work around...
CODE
CREATE OR REPLACE FORCE VIEW XREF_DATA_PRODUCT_V_2
XREF_COLUMN_NAME,
VALUE,
ROWID_1
AS
SELECT 'SEBL_01', A.sebl_01, ROWID
FROM XREF_GOMS_STG A
UNION
SELECT CASE
WHEN C.SOMS_01 = 'Engine Parts' THEN 'GOMS_01'
ELSE 'SOMS_01'
END,
c.goms_01,
ROWID
FROM XREF_GOMS_STG C
union
select 'COMMON',odipocsrc.xref_data_sequence.nextval,rowid
from ODIPOCSRC.XREF_GOMS_STG B
ORDER BY 3;
Thanks

Answer 1

Hi,
Why do you want to use a sequnce there? What are you trying to do? Would numbers generated by the analytic ROW_NUMBER function serve your purpose?
Assuming you really need a sequence, you can hide the sequence in a user-defined function, and use the function in the view, like this:
CREATE OR REPLACE FUNCTION     seq_x_nextval
RETURN     PLS_INTEGER
IS
     return_val      PLS_INTEGER;
BEGIN
     SELECT     seq_x.NEXTVAL
     INTO     return_val
     FROM     dual;
     RETURN     return_val;
END     seq_x_nextval;
CREATE OR REPLACE VIEW     view_x
AS
SELECT     danme
,     seq_x_nextval     AS seq_val
FROM     scott.dept;
SELECT     *
FROM     view_x;Output, when running the query above:
DNAME             SEQ_VAL
ACCOUNTING             52
RESEARCH               53
SALES                  54
OPERATIONS             55Then, running the same query again:
DNAME             SEQ_VAL
ACCOUNTING             56
RESEARCH               57
SALES                  58
OPERATIONS             59Edited by: Frank Kulash on Feb 15, 2010 7:42 PM