Hwo to tell if Streams is up-to-date on the source database

Question

Scenario:
* Red Hat Enterprise Linux Server release 5.2, Oracle 11.1.0.7
* Streams is being used to replicate data from source DBSRC to target DBTRG
* Weekly archiving job on DBSRC needs to check that there are no pending streams updates to DBTRG before it starts archiving data
* How can this be done with recourse to a DB link from DBSRC to DBTRG - anhtying in the DBMS_STREAMS or AQ which will tell us this?

Answer 1

There are many ways do do it, here is the one I use to check descrepancy between objects per site:
set head on
col rsn format A28 head "Rule Set name"
col rn format A30 head "Rule name"
col rt format A64 head "Rule text"
col d_dblk format A34 head 'Destination dblink'
col nams format A31 head 'Source queue'
col namd format A61 head 'Remote queue'
col prop format A22 head 'Propagation name '
col rsname format A20 head 'Rule set name'
COLUMN TOTAL_TIME HEADING 'Total Time Executing|in Seconds' FORMAT 999999
COLUMN TOTAL_NUMBER HEADING 'Total Events Propagated' FORMAT 999999999
COLUMN TOTAL_BYTES HEADING 'Total mb| Propagated' FORMAT 9999999999
COL PROPAGATION_NAME format a24
COL SOURCE_QUEUE_NAME format a24 head "Source| queue name" justify c
COL DESTINATION_QUEUE_NAME format a24 head "Destination| queue name" justify c
col QUEUE_TO_QUEUE format a9 head "Queue to| Queue"
col RULE_SET_NAME format a18
set linesize 125
prompt
set linesize 132
col Stream head 'Stream|Type' justify l
col capture_name for a30
col QUEUE_NAME for a30
col RULE_NAME for a20
col last_snc for 999999999999
break on stream on capture_name on QUEUE_NAME on report
SELECT 'cap' stream, capture_name,  queue_name, rule_type, rule_name , last_enqueued_scn last_snc
       FROM dba_capture dc, dba_streams_rules dsr
      WHERE dsr.rule_set_name = dc.rule_set_name
union
SELECT 'app' stream, dc.apply_name,   queue_name,rule_type, rule_name , nvl(r.DEQUEUED_MESSAGE_NUMBER,0) last_dequeued
       FROM dba_apply@DSDVL2 dc, dba_streams_rules@DSDVL2 dsr, V$STREAMS_APPLY_READER@DSDVL2 r
      WHERE dsr.rule_set_name = dc.rule_set_name
        and dc.apply_name = r.apply_name (+)
union
SELECT 'prop' stream,propagation_name,  source_queue_name,rule_type, rule_name,0 FROM dba_propagation dc, dba_streams_rules dsr
      WHERE dsr.rule_set_name = dc.rule_set_name
order by stream desc
And the output is:
MACHINE host03.unix.b - ORACLE_SID : DEV1                                              Page:   1
Date              -  Tuesday   07th July      2009  12:22:54
Username          -  STRMADMIN
Show propagation overal status and figures (prop -h for help)
Stre
Type CAPTURE_NAME                   QUEUE_NAME                     RULE_TYPE RULE_NAME                 LAST_SNC
cap  CUST_CAPTURE                   CUST_CAPTURE_Q                 DML       DB_LOC31              110519659589
                                                                   DML       LOGGING27             110519659589
                                                                   DML       TEST_BPA47            110519659589
app  CUSTOMR_APPLY                  CUSTOMR_APPLY_Q                DML       DB_LOC154             110519659589
                                                                   DML       LOGGING152            110519659589
                                                                   DML       TEST_BPA159           110519659589You may derived a customized version to check that each object/SCN on source is matched on target. I am quite confident that there are others means to achieve this result