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Bitmap index column goes for full table scan

890271Apr 4 2013 — edited Apr 6 2013
Hi all,

Database : 10g R2
OS : Windows xp

my select query is :

SELECT tran_id, city_id, valid_records
FROM transaction_details
WHERE type_id=101;

And the Explain Plan is :

Plan
SELECT STATEMENT ALL_ROWSCost: 29 Bytes: 8,876 Cardinality: 634
1 TABLE ACCESS FULL TABLE TRANSACTION_DETAILS** Cost: 29 Bytes: 8,876 Cardinality: 634


total number of rows in the table = 1800 ;
distinct value of type_ids are 101,102,103

so i created a bit map index on it.

CREATE BITMAP INDEX btmp_typeid ON transaction_details
(type_id)
LOGGING
NOPARALLEL;

after creating the index, the explain plan shows the same. why it goes for full table scan?.

Kindly share ur idea on this.

Edited by: 887268 on Apr 3, 2013 11:01 PM

Edited by: 887268 on Apr 3, 2013 11:02 PM

Comments

vijayrsehgal-Oracle 
30511, 00000, "invalid DDL operation in system triggers"
// *Cause:  An attempt was made to perform an invalid DDL operation
//          in a system trigger. Most DDL operations currently are not
//          supported in system triggers. The only currently supported DDL
//          operations are table operations and ALTER?COMPILE operations.
// *Action: Remove invalid DDL operations in system triggers.
971895
For that account,it has trigger. that's why it is raising the trigger.
i.e database level trigger ..ask dba to resolve this one.
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Locked on May 4 2013
Added on Apr 4 2013
#column, #for, #index, #table
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