Oracle Streams Errors

Question

Why is this not Supported :
How can i create a non-buffered queue ?ß
BEGIN
DBMS_CAPTURE_ADM.ALTER_CAPTURE(
capture_name => 'capture_demo',
start_scn => 1211212) ;
end;
ORA-25302: Operation not possible for non-buffered queue STRMADM.STREAMS_QUEUE
ORA-06512: at "SYS.DBMS_AQADM_SYS", line 1721
ORA-06512: at "SYS.DBMS_AQADM_SYS", line 3562
ORA-06512: at line 1
ORA-06512: at "SYS.DBMS_CAPTURE_ADM_INTERNAL", line 54
ORA-06512: at "SYS.DBMS_CAPTURE_ADM", line 124
ORA-06512: at line 2
Thanks in advance.

Answer 1

You should create a buffered queue to be able to do this.
I did something like this :
-- queue name and table name should not exceed 24 characters
BEGIN
DBMS_AQADM.CREATE_QUEUE_TABLE(
queue_table=>'logrep$_lchanges_qtab',
queue_payload_type=>'sys.anydata',
multiple_consumers => true,
comment => 'Queue table', compatible => '8.1.3');
END;
BEGIN
DBMS_AQADM.CREATE_QUEUE(
queue_name=>'queue1',
queue_table=>'logrep$_lchanges_qtab',
comment => 'Queue1');
END;
-- start the queue
EXECUTE dbms_aqadm.start_queue (queue_name=>'queue1');
EXECUTE sys.dbms_aqadm_sys.add_buffer (queue_name=>'queue1', memory_threshold=>3000000);
Chandar