Sequence : .CURRVAL is not yet defined in this session

Question

Hi ,
I had created a sequence with the name 'myseq' and used next function to retrieve the value.
But when used currval function
I am getting the following error:
sequence MYSEQ.CURRVAL is not yet defined in this session

Answer 1

898763 wrote:
Hi ,
I had created a sequence with the name 'myseq' and used next function to retrieve the value.
But when used currval function
I am getting the following error:
sequence MYSEQ.CURRVAL is not yet defined in this sessionYou don't need currval. The typical scenario is either to use the sequence value and store it in a variable. Then reuse this variable. Or better insert into a table that has a db trigger that fills the ID column from the sequence. In the latter case you would use the returning clause to fetch the new ID value.
example pl/sql code
declare
  v_empno ename%empno%type;
begin
  /* the empno column is filled by a DB-Trigger from a seqeunce */
  insert into emp (ename)
  values ('Ellison')
  returning empno into v_empno;
  /* do more stuff here, using the variable v_empno */
end;
/