Using NEXTVAL or CURRVAL to Query Global Sequence Numbers

Procedure

1. Connect to a DDM instance.
2. Open the required schema.
3. Run the following command to create a global sequence:

   create sequence seq_test;

   

4. Run the following command to obtain the next sequence number:

   select seq_test.nextval;

   

5. Run the following command to obtain the current sequence number:

   select seq_test.currval;

   

6. Run the following command to obtain sequence numbers in batches:

   select seq_test.nextval(n);

   

   Note

   • Cross-schema operations are not supported when sequence numbers are obtained in batches.
   • If no global sequence is used, CURRVAL returns 0.