Capture every 2 minutes - stream

I'm using Oracle 11 g on RHEL 2

We intend to configure workflows from 11 GR 2-11 GR 2 DW OLTP environment. It would be the replication at the schema level.
Once the stream destination schema is populated with data, we schedule the ETL process to run every 2 minutes, because it is reporting in real time. The amount of data streams would be about 5000 records every minute.

So my question is if I need to look for the most recent data, should I use a TIMESTAMP column in the source tables or flows have integrated all the columns that I can query for the most recent data (recent 2 minutes of data)?
I scoured the Oracle Documentation which States that these attributes can be added by using DBMS_CAPTURE_ADM. INCLUDE_EXTRA_ATTRIBUTE
ROW_ID (ADR rank only)
Serial No.
session #.
thread #.
tx_name
username
But none of them are related to timestamp, is so that the source tables should have the timestamp column if I need to question the recent 2-minute destination schema data value?

I know that CDC can be useful as I can create subscribers and allows to extend the window to retrieve the most recent data but do not know how this can be accomplished with streams? Any thoughts?

Why not add a column on target table type typestamp default value to sysdate? The column has the value when the line was created. Put an index on this and off you go.

Tags: Database

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