Oracle / PLSQL: ORA-08002 Error Message

Learn the cause and how to resolve the ORA-08002 error message in Oracle.

Description

When you encounter an ORA-08002 error, the following error message will appear:

• ORA-08002: sequence NAME.CURRVAL is not yet defined in this session

Cause

You tried to execute a CURRVAL command on a sequence before the NEXTVAL command was executed at least once.

Resolution

The option(s) to resolve this Oracle error are:

Option #1

Try executing the NEXTVAL command for the sequence, initially. Then call the CURRVAL command.

For example, if you created the following sequence.

CREATE SEQUENCE supplier_seq
  MINVALUE 1
  MAXVALUE 999999999999999999999999999
  START WITH 1
  INCREMENT BY 1
  CACHE 20;

Then tried to call the CURRVAL command for this sequence:

SELECT supplier_seq.CURRVAL
FROM dual;

You would receive the following error message:

Your sequence does not yet have a value until you call the NEXTVAL command at least once as follows:

SELECT supplier_seq.NEXTVAL
FROM dual;

Now your sequence has a value assigned to it, so it is okay to execute the CURRVAL command, as follows:

SELECT supplier_seq.CURRVAL
FROM dual;