sql tunning
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Thread: sql tunning

  1. #1
    Join Date
    Aug 2000
    Posts
    87

    sql tunning

    Hi Guys,

    Can any one suggest me to tune the below SQL.

    select
    a.field,
    c.well,
    c.hole_no,
    a.conduit,
    d.production_interval,
    b.daytime,
    --valid_ind,
    b.attribute_name,
    b.attribute_value
    From
    v_re_conduit a,
    v_re_conduit_sample_attr b,
    v_re_completion c,
    v_re_bore d
    where a.object_id = b.object_id
    and b.object_id = d.conduit_object_id
    and a.completion_object_id = c.object_id
    and a.well_object_id = c.well_object_id
    and b.daytime >= add_months (sysdate, -9)
    and c.end_date is null
    and a.end_date is null
    and b.attribute_name in ('BSW', 'SAND')

    The explain is below:
    =====================
    PLAN
    --------------------------------------------------------------------------------
    NESTED LOOPS
    NESTED LOOPS
    NESTED LOOPS
    NESTED LOOPS
    NESTED LOOPS
    NESTED LOOPS
    NESTED LOOPS
    NESTED LOOPS
    NESTED LOOPS
    TABLE ACCESS BY INDEX ROWID OBJECTS
    INDEX RANGE SCAN I_OBJECTS_1

    PLAN
    --------------------------------------------------------------------------------
    TABLE ACCESS BY INDEX ROWID OBJECTS_ATTRIBUTE
    INDEX RANGE SCAN PK_OBJECTS_ATTRIBUTE
    TABLE ACCESS BY INDEX ROWID OBJECT_EVENT_ANALYSIS
    INDEX RANGE SCAN UK_OBJECT_EVENT_ANALYSIS_1
    TABLE ACCESS BY INDEX ROWID WELL
    INDEX UNIQUE SCAN UK_WELL_1
    TABLE ACCESS BY INDEX ROWID WELL
    INDEX UNIQUE SCAN UK_WELL_1
    TABLE ACCESS BY INDEX ROWID WELL
    INDEX UNIQUE SCAN UK_WELL_1
    TABLE ACCESS BY INDEX ROWID WELL_ATTRIBUTE

    PLAN
    --------------------------------------------------------------------------------
    INDEX RANGE SCAN I_WELL_ATTRIBUTE_2
    INDEX RANGE SCAN PK_WEBO_BORE
    TABLE ACCESS BY INDEX ROWID WELL_ATTRIBUTE
    INDEX RANGE SCAN I_WELL_ATTRIBUTE_2
    TABLE ACCESS BY INDEX ROWID WELL_ATTRIBUTE
    INDEX RANGE SCAN I_WELL_ATTRIBUTE_2


    thanks in advance.
    Cheers,
    Vinod

  2. #2
    Join Date
    Dec 2002
    Location
    Bangalore ( India )
    Posts
    2,434
    Well I doubt if the plan is of the SQL u want to tune..

    BTW, why dont u put the plan in "code and /code"
    funky...

    "I Dont Want To Follow A Path, I would Rather Go Where There Is No Path And Leave A Trail."

    "Ego is the worst thing many have, try to overcome it & you will be the best, if not good, person on this earth"

  3. #3
    Join Date
    Aug 2000
    Posts
    87
    Thanks for your Wonderful suggestion.
    I think u will fix the probs as you have replied.

    Anyway the problem is found & fixed.

    No Worries.

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