How can I Improve Shredding Process.

HI ,
I'm shredding XML into multiple realtional tables.
I want to understand what else can I do to improve
the performance.
The ORACLE version we are using is 11.1.0.7
Here is the scenario :
This is how the source table is where the XML is present
CREATE TABLE CLOB_TO_XTP (
          RQST_INFO_ID NUMBER,
          CERT_NBR NUMBER(12 , 0),
          RSP_XML XMLTYPE
     )XMLTYPE COLUMN RSP_XML
STORE AS SECUREFILE CLOB RSP_XML_BIN_LOB1 (
COMPRESS HIGH
RETENTION
NOCACHE
LOGGING
TABLESPACE TS_XML_LOB;
These are the Target Tables (There are many more say over 100)
1]
CREATE TABLE BR_CONT_DTL (
          BR_CONT_DTL_ID NUMBER NOT NULL,
          CRD_RQST_INFO_ID NUMBER,
          CERT_NBR NUMBER(12 , 0),
          NM VARCHAR2(4000)
     )COMPRESS FOR ALL OPERATIONS NOLOGGING;
2]
CREATE TABLE BR_CONT_PNT (
          BR_CONT_PNT_ID NUMBER NOT NULL,
          CRD_RQST_INFO_ID NUMBER,
          CERT_NBR NUMBER(12 , 0),
          VALU VARCHAR2(4000),
          TYPEOTHERDESCRIPTION VARCHAR2(4000),
          TYP VARCHAR2(4000),
          ROLETYPE VARCHAR2(4000),
          PREFERENCEINDICATOR VARCHAR2(4000)
     )COMPRESS FOR ALL OPERATIONS NOLOGGING;
Here are the insert statements :
1]
INSERT into BR_CONT_DTL
select BR_CONT_DTL_ID_SEQ1.nextval,CRD_RQST_INFO_ID,CERT_NBR,temp.*
FROM CLOB_TO_XTP tx,
XMLTABLE('RESPONSE_GROUP/RESPONSE/RESPONSE_DATA/CREDIT_RESPONSE/BORROWER/_RESIDENCE/CONTACT_DETAIL'
PASSING TX.RSP_XML
COLUMNS "_Name" varchar2(4000) PATH '@ _Name'
) as temp;
2]
INSERT into BR_CONT_PNT
select BR_CONT_PNT_ID_SEQ1.nextval,CRD_RQST_INFO_ID,CERT_NBR,temp.*
FROM CLOB_TO_XTP tx,
XMLTABLE('RESPONSE_GROUP/RESPONSE/RESPONSE_DATA/CREDIT_RESPONSE/BORROWER/_RESIDENCE/CONTACT_DETAIL/CONTACT_POINT'
PASSING TX.RSP_XML
COLUMNS "_Value" varchar2(4000) PATH '@ _Value',
"_TypeOtherDescription" varchar2(4000) PATH '@ _TypeOtherDescription',
"_Type" varchar2(4000) PATH '@ _Type',
"_RoleType" varchar2(4000) PATH '@ _RoleType',
"_PreferenceIndicator" varchar2(4000) PATH '@ _PreferenceIndicator'
) as temp;
Everything works smoothly. The data is getting shredded into appropriate tables.
Now I want to improve the execution time. Is there any thing which I can do.
I tried storing the source table as SECUREFILE BINARY XML
but had some ORA-00600 errors generated. This had improved the
execution time , but at the cost of ORA-00600.
Is there any way I can use XML - Indexes ?
Thanks ,
Aniket

RSP_XML XMLTYPE
) XMLTYPE COLUMN RSP_XML
STORE AS SECUREFILE CLOB RSP_XML_BIN_LOB1 (
COMPRESS HIGH Securefiles where introduced in 11.1.
AFAIK they have/had multiple issues regarding securefile & compression in 11.1. Most of them have been solved in 11.2, that's Oracle support advised to upgrade.
Remove the "COMPRESS HIGH" clause and I am guessing you are in the clear regarding the ORA-00600 issues. If you can pinpoint it to a specific issues, I would, via a SR, ask for a backport if available.
The better option would be (indeed)...
RSP_XML XMLTYPE
) XMLTYPE COLUMN RSP_XML
STORE AS SECUREFILE BINARY XML (...)with compression NOT set (set to default)...
Edited by: Marco Gralike on Aug 9, 2012 10:45 AM

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