Check optimizer_mode in v$parameter for your session. I don't think it will eliminate
partitions if it is RULE.
Here is an explain plan from a simple select on a partitioned table. An index exists:
SELECT STATEMENT Optimizer=CHOOSE (Cost=1.69535189333285 Card=32 Bytes=3488)
PARTITION RANGE (SINGLE)
TABLE ACCESS (BY LOCAL INDEX ROWID) OF DMS_AMA_RECORDS (Cost=1.69535189333285
Card=32 Bytes=3488)
BITMAP CONVERSION (TO ROWIDS)
BITMAP INDEX (SINGLE VALUE) OF DMS_AMA_RECORDS_UI1
Jay Hostetter
Oracle DBA
D. & E. Communications
Ephrata, PA USA
>>> [EMAIL PROTECTED] 05/31/01 12:00PM >>>
Hi All,
Can anyone help me with this.
I have range partitioned a table (no indexes) and then computed statistics.
I have now queried the table using the partition key as the only criteria in
the where clause. Why does Oracle still do a full table scan, why is it not
clever enough to only scan the partition(s) effected by the where
condition?.
The Oracle documentation gives a good insight into partitioning but does not
go into detail about when partition elimination will be performed and what
the explain plan would look like when this occurs. If anyone can point me
to a section of the documentation that covers this I would be grateful.
Many Thanks,
Dave Leach
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