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Oracle 12c Inmemory Access Paths

edited Apr 6, 2016 5:06AM in SQL Performance (MOSC) 1 commentAnswered

Hi,

I am using Oracle version 12.1.0.2.0, and I am trying to use 12c inmemory columnar option. Whenever I generate execution plans after pulling table into inmemory, I could only see TABLE ACCESS INMEMORY FULL. I could not see or find any other access path related to inmemory.


1. Does this mean the 12c Columnar option shows/has only one access path ?

2. Is TABLE ACCESS INMEMORY FULL replacing traditional full table scans ?

3. If the traditional execution plan(no inmemory) is using an index to get rowids, and is doing table access using index rowids, and one of those steps is taking time, is there an alternative that 12c inmemory provides which can be a better/faster option ?

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