CREATE SEQUENCE from a stored procedure

Question

Hello,
Is it possible, to create a sequence object from an own written stored procedure? Can I reinitialize the actual value of a sequence object without recreating it from a stored procedure?
Thank you for recommendations,
Matthias Schoelzel
EDV Studio ALINA GmbH
Bad Oeynhausen

Answer 1

maybe this example might be of some help.
SQL> create or replace procedure dy_sequence (pSeqName varchar2,
  2                                           pStart number,
  3                                           pIncrement number) as
  4    vCnt     number := 0;
  5  begin
  6    select count(*) into vCnt
  7      from all_sequences
  8     where sequence_name = upper(pSeqName);
  9 
10    if vCnt = 0 then
11      execute immediate 'create sequence '||pSeqName||
12                        ' start with '||to_char(pStart)||
13                        ' increment by '||to_char(pIncrement);
14    else
15      execute immediate 'alter sequence '||pSeqName||' increment by '||to_char(pIncrement);
16    end if;
17  end;
18  /
Procedure created.
SQL> -- create the sequence by calling the dy_sequence procedure
SQL> execute dy_sequence ('test_sequence',1,1);
PL/SQL procedure successfully completed.
SQL> select test_sequence.nextval from dual;
   NEXTVAL
         1
SQL> -- alter the sequence to increment by 2
SQL> execute dy_sequence ('test_sequence',0,2);
PL/SQL procedure successfully completed.
SQL> select test_sequence.nextval from dual;
   NEXTVAL
         3
SQL>