Exeuction plan

Question

Hi
I Have some problem with the query execution plan. when i executed the query the exeution plan in 2 different schemas for the same query. and i have checked in both the schemas i have same table names, indexes on same columns and the statistics is collected for whole database (except sys and system) so both the schemas have the statistics up-to-date.
here i am attaching pasting the just taken the execution plan by setting
set autotrace traceonly explain.
And partitions are also there.
SQL> select c.cid from tcdbapp.consumer c, tcdbapp.consumer_contact cc where c.cid=cc.cid
and (upper(cc.email_address)=upper('[email protected]') or cc.mobile_no='[phone]')
and c.delete_date is null 2 3 ;
Elapsed: 00:00:00.01
Execution Plan
0
SELECT STATEMENT Optimizer=CHOOSE (Cost=97 Card=33 Bytes=1683)
1 0
NESTED LOOPS (Cost=97 Card=33 Bytes=1683)
2 1
PARTITION HASH (ALL)
3 2
TABLE ACCESS (BY LOCAL INDEX ROWID) OF 'CONSUMER_CONTACT' (Cost=31 Card=33 Bytes=1254)
4 3
BITMAP CONVERSION (TO ROWIDS)
5 4
BITMAP OR
6 5
BITMAP CONVERSION (FROM ROWIDS)
7 6
INDEX (RANGE SCAN) OF 'CONS_CONTACT_EMAIL_IDX1' (NON-UNIQUE) (Cost=9)
8 5
BITMAP CONVERSION (FROM ROWIDS)
9 8
INDEX (RANGE SCAN) OF 'CONS_CONTACT_IDX2' (NON-UNIQUE) (Cost=9)
10 1
PARTITION HASH (ITERATOR)
11 10
TABLE ACCESS (BY LOCAL INDEX ROWID) OF 'CONSUMER' (Cost=2 Card=1 Bytes=13)
12 11
INDEX (UNIQUE SCAN) OF 'PK_CONS' (UNIQUE) (Cost=1 Card=1)
SQL> select c.cid from consumer c, consumer_contact cc where c.cid=cc.cid
and (upper(cc.email_address)=upper('[email protected]') or cc.mobile_no='[phone]')
and c.delete_date is null 2 3 ;
Elapsed: 00:00:00.01
Execution Plan
0
SELECT STATEMENT Optimizer=CHOOSE (Cost=136 Card=482 Bytes=19280)
1 0
PARTITION HASH (ALL)
2 1
HASH JOIN (Cost=136 Card=482 Bytes=19280)
3 2
TABLE ACCESS (FULL) OF 'CONSUMER_CONTACT' (Cost=72 Card=482 Bytes=13014)
4 2
TABLE ACCESS (FULL) OF 'CONSUMER' (Cost=60 Card=31820 Bytes=413660)
help needed
thanks and regards
Chandu Singh

Answer 1

Hi Jehan
There are differences in number or rows in both the schemas.
owner     blevel     leaf_blocks     distinct_keys     avg_leaf_blocks_per_key     avg_data_blocks_per_key     clustering_factor     num_rows
CDBAPP     1.00     17.00     560.00     1.00     1.00     310.00     749.00
CDBAPP     1.00     113.00     17 603.00     1.00     1.00     9 545.00     17 603.00
CDBAPP     1.00     37.00     560.00     1.00     1.00     310.00     749.00
CDBAPP     1.00     76.00     777.00     1.00     5.00     4 384.00     5 002.00
TCDBAPP     2.00     4 037.00     752 686.00     1.00     1.00     19 898.00     752 686.00
TCDBAPP     2.00     2 437.00     180 512.00     1.00     2.00     426 899.00     624 379.00
TCDBAPP     2.00     3 093.00     70 648.00     1.00     8.00     593 574.00     613 049.00
TCDBAPP     2.00     2 462.00     162 935.00     1.00     2.00     419 149.00     623 928.00
But in user tables the num_rows , chain_cnt, and blocks are not updated. Even after the tables are gathering the statistics daily.
Chandu Singh