TWO_index on same column

Hi All,
In One of my table i saw two index on same column , NORMAL and BITMAP. is it necessary . how it will increase/Decrease the performance .
select index_name,index_type,owner,table_name from dba_indexes where table_name='DS_ATTRSTORE';
INDEX_NAME INDEX_TYPE OWNER TABLE_NAME
EI_ATTRSTORE BITMAP ODS DS_ATTRSTORE
EI_ATTRSTORE_ORG NORMAL ODS DS_ATTRSTORE
EI_ATTRSTORE_ATTRVAL BITMAP ODS DS_ATTRSTORE
select count(*) from ODS.DS_ATTRSTORE;
COUNT(*)
14892879
some times iam getting some deadlock error in this table . i doubted that because of useless Normal index already Bitmap is there in table ..guess so ..
please help me on this.
Thanks,
Edited by: 826854 on Nov 27, 2012 2:31 AM
Edited by: 826854 on Nov 27, 2012 2:31 AM

>
In One of my table i saw two index on same column , NORMAL and BITMAP. is it necessary . how it will increase/Decrease the performance .
select index_name,index_type,owner,table_name from dba_indexes where table_name='DS_ATTRSTORE';
INDEX_NAME INDEX_TYPE OWNER TABLE_NAME
EI_ATTRSTORE BITMAP ODS DS_ATTRSTORE
EI_ATTRSTORE_ORG NORMAL ODS DS_ATTRSTORE
EI_ATTRSTORE_ATTRVAL BITMAP ODS DS_ATTRSTORE
>
What you posted just shows the indexes; it doesn't show whether those are on the same column and what other columns might be included in each index.
Any DML on a BITMAP index will likely cause serialization and performance issues since at least two sets of rows need to be locked in order to do an insert or update.

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Can you post some examples as described in the FAQ: {message:id=9360002}
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Message was edited by:
Marcello Nocito

Hi to all,
i've solved, is very simple using decode inside the select:
SELECT
ID,
FK_HTMLDB_ITEM, DECODE(FK_HTMLDB_ITEM,1,HTMLDB_ITEM.DATE_POPUP(3,rownum,VAL,'dd-mon-yyyy'),2,HTMLDB_ITEM.TEXT(3,VAL)) VALORE
FROM TESTID
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(     "ID" NUMBER NOT NULL ENABLE,
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Bye Bye

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string_line VARCHAR2(1000);
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Thanks for replies. I don't know what I am doing wrong but still not getting this damn thing work...This is the proc i am running now :
declare
table_list UTL_FILE.FILE_TYPE;
string_line VARCHAR2(1000);
tables_count number:=0;
table_name VARCHAR2(4000);
column_name VARCHAR2(4000);
code_text VARCHAR2(2000);
BEGIN
table_list := UTL_FILE.FOPEN('ORALOAD','test7.txt','R');
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UTL_FILE.GET_LINE(table_list,string_line);
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column_name := substr(string_line, instr(string_line,'|')+1);
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PL/SQL: ORA-00933: SQL command not properly ended
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Hi,
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2 As Select
3 PAC051MPROFORMA.mrn,
4 PAC051MPROFORMA.visitid,
5 PAC051TPROFORMA.mrn,
6 PAC051TPROFORMA.visitid,
7 PAC052MTRANSBILL.mrn,
8 PAC052MTRANSBILL.visitid
9 from PAC051MPROFORMA,PAC051TPROFORMA,PAC052MTRANSBILL
10 where
11 (PAC051MPROFORMA.mrn=PAC051TPROFORMA.mrn)
12 and
13 (PAC051TPROFORMA.mrn=PAC052MTRANSBILL.mrn);
CREATE VIEW pacviewproforma (mrn,visitid,mrn,visitid,mrn,visitid)
ERROR at line 1:
ORA-00957: duplicate column namePlease give different names to each column.
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5 PAC051TPROFORMA.mrn,
6 PAC051TPROFORMA.visitid,
7 PAC052MTRANSBILL.mrn,
8 PAC052MTRANSBILL.visitid
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11 (PAC051MPROFORMA.mrn=PAC051TPROFORMA.mrn)
12 and
13 (PAC051TPROFORMA.mrn=PAC052MTRANSBILL.mrn);
View created.
SQL> DESC pacviewproforma;
Name                                      Null?    Type
MPROFORMA_MRN                                      NUMBER
MPROFORMA_VISITID                                  NUMBER
TPROFORMA_MRN                                      NUMBER
TPROFORMA_VISITID                                  NUMBER
MTRANSBILL_MRN                                     NUMBER
MTRANSBILL_VISITID                                 NUMBER
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Twinkle

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