SELECT on a Single Column (or Only a Few Columns) Does Not Partition Prune

(Doc ID 2032295.1)

Last updated on JULY 15, 2015

Applies to:

Oracle Database - Enterprise Edition - Version and later
Information in this document applies to any platform.



The number of columns in a select list seems to determine whether partition pruning is used or not, when all else stays the same.  


Example: (Note: BUS_DTE is the partitioning key for table FACT_PERFORMANCE_SEC)

A. Here, a single column is being selected, which results in an FTS on all 481 partitions of FACT_PERFORMANCE_SEC.



 The only thing in the query that changes is the number of columns in the select list.


Sign In with your My Oracle Support account

Don't have a My Oracle Support account? Click to get started

My Oracle Support provides customers with access to over a
Million Knowledge Articles and hundreds of Community platforms