Query using progressive relaxation take more time for execution

HI gurus,

I'm creating a query using the context and the progressive relaxation index

I had started using progressive relaxation after obtaining the forum entries {: identifier of the thread = 2333942}. With the help of progressive relaxation takes more than 7 seconds for each request. Is there a way we can improve the query performance?
 create table test_sh4 (text1 clob,text2 clob,text3 clob);

begin
   ctx_ddl.create_preference ('nd_mcd', 'multi_column_datastore');
   ctx_ddl.set_attribute
       ('nd_mcd',
        'columns',
        'replace (text1, '' '', '''') nd1,
         text1 text1,
         replace (text2, '' '', '''') nd2,
         text2 text2');
   ctx_ddl.create_preference ('test_lex1', 'basic_lexer');
   ctx_ddl.set_attribute ('test_lex1', 'whitespace', '/\|-_+');
   ctx_ddl.create_section_group ('test_sg', 'basic_section_group');
   ctx_ddl.add_field_section ('test_sg', 'text1', 'text1', true);
   ctx_ddl.add_field_section ('test_sg', 'nd1', 'nd1', true);
   ctx_ddl.add_field_section ('test_sg', 'text2', 'text2', true);
   ctx_ddl.add_field_section ('test_sg', 'nd2', 'nd2', true);
 end;

create index IX_test_sh4 on test_sh4 (text3)   indextype is ctxsys.context   parameters    ('datastore     nd_mcd   lexer test_lex1 section group     test_sg') ;

alter index IX_test_sh4 REBUILD PARAMETERS ('REPLACE SYNC (ON COMMIT)') ;-- sync index on every commit. 


SELECT SCORE(1) score,t.* FROM test_sh4 t WHERE CONTAINS (text3,  '
<query>
<textquery>
<progression>
<seq>{GIFT GRILL STAPLES CARD} within text1</seq>
<seq>{GIFTGRILLSTAPLESCARD} within nd1</seq>
<seq>{GIFT GRILL STAPLES CARD} within text2</seq>
<seq>{GIFTGRILLSTAPLESCARD} within nd2</seq>
<seq>((%GIFT% and %GRILL% and %STAPLES% and %CARD%)) within text1</seq>
<seq>((%GIFT% and %GRILL% and %STAPLES% and %CARD%)) within text2</seq>
<seq>((%GIFT% and %GRILL% and %STAPLES%) or (%GRILL% and %STAPLES% and %CARD%) or (%GIFT% and %STAPLES% and %CARD%) or (%GIFT% and %GRILL% and %CARD%)) within text1</seq>
<seq>((%GIFT% and %GRILL% and %STAPLES%) or (%GRILL% and %STAPLES% and %CARD%) or (%GIFT% and %STAPLES% and %CARD%) or (%GIFT% and %GRILL% and %CARD%)) within text2</seq>
<seq>((%STAPLES% and %CARD%) or (%GIFT% and %GRILL%) or (%GRILL% and %CARD%) or (%GIFT% and %CARD%) or (%GIFT% and %STAPLES%) or (%GRILL% and %STAPLES%)) within text1</seq>
<seq>((%STAPLES% and %CARD%) or (%GIFT% and %GRILL%) or (%GRILL% and %CARD%) or (%GIFT% and %CARD%) or (%GIFT% and %STAPLES%) or (%GRILL% and %STAPLES%)) within text2</seq>
<seq>((%GIFT% , %GRILL% , %STAPLES% , %CARD%)) within text1</seq>
<seq>((%GIFT% , %GRILL% , %STAPLES% , %CARD%)) within text2</seq>
<seq>((!GIFT and !GRILL and !STAPLES and !CARD)) within text1</seq>
<seq>((!GIFT and !GRILL and !STAPLES and !CARD)) within text2</seq>
<seq>((!GIFT and !GRILL and !STAPLES) or (!GRILL and !STAPLES and !CARD) or (!GIFT and !STAPLES and !CARD) or (!GIFT and !GRILL and !CARD)) within text1</seq>
<seq>((!GIFT and !GRILL and !STAPLES) or (!GRILL and !STAPLES and !CARD) or (!GIFT and !STAPLES and !CARD) or (!GIFT and !GRILL and !CARD)) within text2</seq>
<seq>((!STAPLES and !CARD) or (!GIFT and !GRILL) or (!GRILL and !CARD) or (!GIFT and !CARD) or (!GIFT and !STAPLES) or (!GRILL and !STAPLES)) within text1</seq>
<seq>((!STAPLES and !CARD) or (!GIFT and !GRILL) or (!GRILL and !CARD) or (!GIFT and !CARD) or (!GIFT and !STAPLES) or (!GRILL and !STAPLES)) within text2</seq>
<seq>((!GIFT , !GRILL , !STAPLES , !CARD)) within text1</seq>
<seq>((!GIFT , !GRILL , !STAPLES , !CARD)) within text2</seq>
<seq>((?GIFT and ?GRILL and ?STAPLES and ?CARD)) within text1</seq>
<seq>((?GIFT and ?GRILL and ?STAPLES and ?CARD)) within text2</seq>
<seq>((?GIFT and ?GRILL and ?STAPLES) or (?GRILL and ?STAPLES and ?CARD) or (?GIFT and ?STAPLES and ?CARD) or (?GIFT and ?GRILL and ?CARD)) within text1</seq>
<seq>((?GIFT and ?GRILL and ?STAPLES) or (?GRILL and ?STAPLES and ?CARD) or (?GIFT and ?STAPLES and ?CARD) or (?GIFT and ?GRILL and ?CARD)) within text2</seq>
<seq>((?STAPLES and ?CARD) or (?GIFT and ?GRILL) or (?GRILL and ?CARD) or (?GIFT and ?CARD) or (?GIFT and ?STAPLES) or (?GRILL and ?STAPLES)) within text1</seq>
<seq>((?STAPLES and ?CARD) or (?GIFT and ?GRILL) or (?GRILL and ?CARD) or (?GIFT and ?CARD) or (?GIFT and ?STAPLES) or (?GRILL and ?STAPLES)) within text2</seq>
<seq>((?GIFT , ?GRILL , ?STAPLES , ?CARD)) within text1</seq>
<seq>((?GIFT , ?GRILL , ?STAPLES , ?CARD)) within text2</seq>
</progression>
</textquery>
<score datatype="FLOAT" algorithm="default"/>
</query>',1) >0 ORDER BY score(1) DESC

Progressive relaxation works best when you select only a limited number of lines. If you retrieve ALL the rows that satisfy the query, then every step of easing should run without worrying.

If you collect - say - the first 10 results, then if the first step in the relaxation gives 10 results so there is no need to execute the next step (actually, due to the internal buffering, which won't be exactly true but he is theoretically correct).

The easiest way to proceed is to reformulate the query in the form

SELECT * FROM)
(Score select (1) SCORE, t.* FROM test_sh4 t WHERE CONTAINS (Text3, '))


...


(1) > 0 ORDER BY score (1) DESC
)
WHERE ROWNUM<=>

You have discovered that wildcards don't work too well, unless you use SUBSTRING_INDEX. I encourage you to avoid completely if possible, or push down much lower in the progressive relaxation. Usually, GIFT % is a useful term (matches GIFTS, GIFTED, etc.), DON % is generally more effective.

There are a lot of steps in your progressive relaxation. It you want to reduce the number of steps, you can change:

((GIFT and percent of the GRID and STAPLES % and CARD %)) in Text1
((GIFT and percent of the GRID and STAPLES % and CARD %)) in Text2

TO

((CADEAU % et % de la GRILLE et AGRAFES % et CARTE %) * 2) within Text1 ACCUM ((GIFT and percent of the GRID and STAPLES % and CARD %)) in Text2

I don't know if it would have performance benefits - but it is worth trying to see.

Tags: Database

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    AND trx.org_id = nvl(:p_org_id,trx.org_id)
    AND trx.attribute1 = period.period_id
    AND trx.customer_trx_id = pay.customer_trx_id
    AND cla.branch_id = NVL (: p_branch, cla.branch_id)
    AND to_char(trx.creation_date,'YYYY/MM/DD') between substr(:p_date_from,1,10) and substr(:p_date_to,1,10)
    and pay.amount_due_remaining > 0
    )

    Hello

    I see a lot of problem in your query.
    First, there is the request of duplication in Union all, who take.
    There is also the filter condition that is of no use.

    AND trx.org_id = nvl(trx.org_id,trx.org_id)

    AND cla.branch_id = NVL (cla.branch_id, cla.branch_id)

    Conditional is just out from the first query in the union. and again you choose the same lines using account_number, which is nothing else than the same thing.

    and st.account_number in
(   SELECT distinct
     st.account_number as Roll_Number

     FROM
     ra_customer_trx_all trx,
     the_city_school_students st,
     class_v_table cla,
     bill_period period,
     ar_payment_schedules_all pay
     WHERE

     trx.attribute_category = nvl(:P_CHALLAN_TYPE,trx.attribute_category)
     AND trx.attribute2 = cla.fee_structure_id
     AND trx.bill_to_customer_id = st.cust_account_id
     AND trx.org_id = nvl(:p_org_id,trx.org_id)
     AND trx.attribute1 = period.period_id
     AND trx.customer_trx_id = pay.customer_trx_id
     AND cla.branch_id = NVL (:p_branch, cla.branch_id)
     AND to_char(trx.creation_date,'YYYY/MM/DD') between substr(:p_date_from,1,10) and substr(:p_date_to,1,10)
     and pay.amount_due_remaining >0 )

    so I think that under query will work

    SELECT
decode(cla.r_description,'Central Region','CR','Southern Region','SR','Northern Region','NR','Mehran Region','MR','Quetta HO','QHO') as Region,
''''|| to_char(trx.trx_number) as challan_Num,
st.account_number as Roll_Number,
st.party_name as Student_Name,
cla.class_name||'-'||st.section as Class_Section,
period.period_name as Fee_Period,
pay.TRX_DATE as Issue_date ,
pay.DUE_DATE as due_date,
pay.due_date as valid_date,
pay.amount_due_remaining amount
FROM
ra_customer_trx_all trx,
the_city_school_students st,
class_v_table cla,
bill_period period,
ar_payment_schedules_all pay
WHERE
trx.attribute_category = nvl(:P_CHALLAN_TYPE,trx.attribute_category)
AND trx.attribute2 = cla.fee_structure_id
AND trx.bill_to_customer_id = st.cust_account_id
AND trx.org_id = nvl(:p_org_id,trx.org_id)
AND trx.attribute1 = period.period_id
AND trx.customer_trx_id = pay.customer_trx_id
AND cla.branch_id = NVL (:p_branch, cla.branch_id)
AND (
     (trx.creation_date between TO_DATE(substr(:p_date_from,1,10),'YYYY/MM/DD') and TO_DATE(substr(:p_date_to,1,10),'YYYY/MM/DD'))
          OR
     (trx.creation_date < TO_DATE(substr(:p_date_from,1,10),'YYYY/MM/DD'))
     )
and pay.amount_due_remaining >0
UNION ALL
select
decode(A.r_description,'Central Region','CR','Southern Region','SR','Northern Region','NR','Mehran Region','MR','Quetta HO','QHO') as Region
,acd.ADM_CHALLAN_NO as challan_Num
,bsr.STUDENT_REGISTRATION_NO as Roll_Number
,bsr.STUDENT_NAME as Student_Name
,bc.CLASS_NAME as Class_Section
,' ' as Fee_Period
,acd.ADM_ISSUE_DATE as Issue_date
,acd.ADM_due_DATE as due_date
,acd.ADM_due_DATE as valid_date
,(ac.original_total+ac.adm_original_optional_total) amount
from bill_student_registration bsr
, adm_challan ac
, adm_challan_detail acd
, bill_class bc
, branch_network_region_link a
where
ac.STUDENT_REGISTARTION_ID = bsr.STUDENT_REGISTRATION_ID
AND bc.CLASS_ID = bsr.REGISTRATION_CLASS_ID
AND a.BRANCH = bsr.BRANCH_ID
AND ac.adm_challan_id = acd.adm_challan_id
---and ADM_PAID = 'N'
AND bsr.ORG_ID = nvl(:p_org_id,bsr.ORG_ID)
AND bsr.STUDENT_REGISTRATION_DATE between TO_DATE(substr(:p_date_from,1,10),'YYYY/MM/DD') and TO_DATE(substr(:p_date_to,1,10),'YYYY/MM/DD')
AND decode(A.r_description,'Central Region','CR','Southern Region','SR','Northern Region','NR','Mehran Region','MR','Quetta HO','QHO') is not null
AND bsr.BRANCH_ID = NVL (:p_branch, bsr.BRANCH_ID);

    Hope this helps

    Thank you!!!
    Didier

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