Long running mapping when using Mapping Transformations
Hi,
I have a source table with 8,000 records which I would like to merge using the update/insert operator into my target table. This simple operation takes 15 sec which I am very happy with. The problem I have is when I try to call a series of Functions using Mapping Transformations - when I do this the performance of the mapping is dire - it now takes longer than 40min!!!
The strange thing is that when I generate the intermediate result and run the code (not including the Merge in to my Target table) in TOAD, the results come back quickly? So I am not sure if there is a problem with the fact that I am using Mapping Transformations or if I am using a Merge on the Target Table...
I have taken off Parrallel hints on the target table and applied the relevant indexes.
I am really lost and any help would be most appreciated.
Regards
Mitesh
If you could let us know what kind of functions you are using? I had experienced the same problem while calling a function using a Mapping Transformation. The functions used a cursor and for every source record these function were getting called and the cursor was opened and closed, which caused a performance bottleneck.
Better write the functions with direct SQLs and no cursors, if possible or use a temporary table, joiner operator or look up operator to achieve the task.
This should reduce the execution time considerably.
Regards
Arnab
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where
l.date_key = f.call_date_key and
g.geography_key = f.geography_key and
r.dest_key = f.dest_key and
p.product_key = f.product_key and
--c.customer_key = f.customer_key and
d.customer_key = f.customer_key and
t.contract_key = f.contract_key and
s.SUBSCRIBER_KEY = f.SUBSCRIBER_KEY and
o.org_id(+) = AR_OrgId and
g.country_code = pCountry and
l.actual_date >= startdate and
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group by
l.actual_date,
o.city||o.zipcode, g.country_code,d.customer_name, d.customer_number,t.contrno,r.dest_level3, p.product_code;
Type CountryTabType is Table of country_traffic_details.Country%Type index by BINARY_INTEGER;
Type CallDateTabType is Table of country_traffic_details.CALL_DATE%Type index by BINARY_INTEGER;
Type CustomerNameTabType is Table of Country_traffic_details.Customer_name%Type index by BINARY_INTEGER;
Type CustomerNumberTabType is Table of Country_traffic_details.Customer_number%Type index by BINARY_INTEGER;
Type BcnTabType is Table of Country_traffic_details.Bcn%Type index by BINARY_INTEGER;
Type DestinationTypeTabType is Table of Country_traffic_details.DESTINATION_TYPE%Type index by BINARY_INTEGER;
Type ProductCodeTabType is Table of Country_traffic_details.Product_Code%Type index by BINARY_INTEGER;
Type ProductTabType is Table of Country_traffic_details.Product%Type index by BINARY_INTEGER;
Type DurationTabType is Table of Country_traffic_details.Duration%Type index by BINARY_INTEGER;
Type DebamounteurTabType is Table of Country_traffic_details.DEBAMOUNTEUR%Type index by BINARY_INTEGER;
Type SiteTabType is Table of Country_traffic_details.Site%Type index by BINARY_INTEGER;
CountryArr CountryTabType;
CallDateArr CallDateTabType;
Customer_NameArr CustomerNameTabType;
CustomerNumberArr CustomerNumberTabType;
BCNArr BCNTabType;
DESTINATION_TYPEArr DESTINATIONTYPETabType;
PRODUCT_CODEArr PRODUCTCODETabType;
PRODUCTArr PRODUCTTabType;
DurationArr DurationTabType;
DebamounteurArr DebamounteurTabType;
SiteArr SiteTabType;
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when 'PT' then AR_OrgId := 124;
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when 'IE' then AR_OrgId := 128;
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when 'NL' then AR_OrgId := 129;
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when 'UK' then AR_OrgId := 131;
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end case;
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populateOrderDetails(AR_OrgId);
dbms_output.put_line('4: '||to_char(sysdate, 'HH24:MI:SS'));
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Open cTraffic;
Loop
Exe_Pos := 5;
CallDateArr.delete;
FETCH cTraffic BULK COLLECT
INTO CallDateArr, SiteArr, CountryArr, Customer_NameArr,CustomerNumberArr,
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FORALL i IN 1..callDateArr.last
insert into country_traffic_details
values(CallDateArr(i), CountryArr(i), Customer_NameArr(i),CustomerNumberArr(i),
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dbms_output.put_line('7: '||to_char(sysdate, 'HH24:MI:SS'));
EXIT WHEN ctraffic%NOTFOUND;
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commit;
Exe_Pos := 8;
commit;
dbms_output.put_line('8: '||to_char(sysdate, 'HH24:MI:SS'));
lSql := 'CREATE INDEX COUNTRY_TRAFFIC_DETAILS_CUSTNO ON country_traffic_details (CUSTOMER_NUMBER)';
execDDl(lSql);
lSql := 'CREATE INDEX COUNTRY_TRAFFIC_DETAILS_BCN ON country_traffic_details (BCN)';
execDDl(lSql);
lSql := 'CREATE INDEX COUNTRY_TRAFFIC_DETAILS_PRODCD ON country_traffic_details (PRODUCT_CODE)';
execDDl(lSql);
lSql := 'CREATE INDEX COUNTRY_TRAFFIC_DETAILS_SITE ON country_traffic_details (SITE)';
execDDl(lSql);
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When Others then
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