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Fast table scan of ORA_ROWSCN

For change data capture (inserts and updates only) it would be useful to capture changes to a table by using ORA_ROWSCN. We would simply query the table where the ORA_ROWSCN was greater than the last SCN we used to query the table the last time we queried it. The problem is that this sort of query will perform a full table scan because ORA_ROWSCN is a pseudo column and cannot be indexed with a traditional index, so performance is slow on a multi-million row table.

The solution would be for the database to have some sort of fast scan capability on ORA_ROWSCN so it could efficiently find blocks/rows by SCN. I imagine some sort of feature like storage indexes on exadata might be a good implementation.

sbird-Oracle
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