Interpretation of TKPROF output

I am running tkprof on some trace files with the following options:
(Oracle 8.1.7)

explain=<user>/<password> sort=exeqry,fchqry,execu,fchcu

Output after each query includes the following two tables:

Rows Row Source Operation

-------  ---------------------------------------------------
     36  INLIST ITERATOR
     36   TABLE ACCESS BY INDEX ROWID PART_LIST
     72    INDEX RANGE SCAN (object id 3451)


Rows     Execution Plan
-------  ---------------------------------------------------
      0  SELECT STATEMENT   GOAL: CHOOSE
     36   TABLE ACCESS   GOAL: ANALYZED (FULL) OF 'PART_LIST'

The "Execution Plan" table corresponds to the Explain Plan section of the Performance manual. There is no mention, however, of the "Row Source Operation" table. I note particularly, that in some cases the first table seems to agree with the second. In others, however, such as the example here, the Row Source table shows use of an index while the Execution Plan shows a Table Access (Full table scan?).

Am I interpreting this correctly? If so, what is going on?

Thanks,

Peter Schauss
Northrop Grumman Corporation
schaupe_at_mail.northgrum.com

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Author: Schauss, Peter
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