How to access the NEXTVAL CURRVAL on columns of IDENTITY Oracle 12 c?

With the help of Oracle 12 c I defined an identity column:

create table test (col1 number generated default as identity (start with 1 by 1 increment), col2 varchar2 (100));

Oracle then automatically generates a sequence for my identity column.

Is there a way (/ the call of the function/etc..) to access the CURRVAL / NEXTVAL for this given sequence I don't have the name of sequence? (without having to query the system catalog).

I try to avoid the manual creation of a sequence for each of the tables that need the auto-numbering and let Oracle manage automatically creating the sequence, but I need to join the just inserted number in my identity column when inserting in the line, essentially the CURRVAL. Looking forward to use IDENTITY columns...

Thank you!

user537222 wrote:

With the help of Oracle 12 c I defined an identity column:

create table test (col1 number generated default as identity (start with 1 by 1 increment), col2 varchar2 (100));

Oracle then automatically generates a sequence for my identity column.

Is there a way (/ the call of the function/etc..) to access the CURRVAL / NEXTVAL for this given sequence I don't have the name of sequence? (without having to query the system catalog).

I try to avoid the manual creation of a sequence for each of the tables that need the auto-numbering and let Oracle manage automatically creating the sequence, but I need to join the just inserted number in my identity column when inserting in the line, essentially the CURRVAL. Looking forward to use IDENTITY columns...

Thank you!

You can do this in the way you would normally do: using PL/SQL and the RETURNING clause. Here is an article from the Oracle base that shows the use of a RETURNING clause. Just ignore the part that explicitly inserts the value of the sequence given that the IDENTITY column that will do it for you.j

http://www.Oracle-base.com/articles/Misc/DML-returning-into-clause.php

>

SET SERVEROUTPUT ON

DECLARE

T1.ID%type l_id;

BEGIN

INSERT INTO t1 VALUES (t1_seq.nextval, 'FOUR')

RETURN the id INTO l_id;

COMMIT;

Dbms_output.put_line ('ID =' | l_id);

END;

/

ID = 4

PL/SQL procedure successfully completed.

>

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