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Question and Answer

Connor McDonald

Thanks for the question, Ali.

Asked: February 20, 2019 - 2:50 pm UTC

Last updated: February 22, 2019 - 7:09 am UTC

Version: 12c

Viewed 1000+ times

You Asked

Hello Tom, would you explain a little which way is better to check on delta of information to populate DWh on schema? Materialized view log or LOGMNR?

and Connor said...

Easiest way is Goldengate...but yes I know, that is not cheap.

I did a video on all the options at your disposal:



One I would caution *against* using is materialized view logs. Because they are built for *us* solely for the purpose of materialized view refreshing.

So we are within our rights to totally change their structure, what data they capture, what format that data is in from release to release. For example, what if in (say) 19c we now capture 3 rows for every insert instead of 1. Or perhaps we only capture a binary raw image of a row that can't be dissected by user code.

That's a risky proposition.

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