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Message Posted: Tue, 21 Feb 2006 @ 19:12:31 GMT


     
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Subj:   A query on the PI properties of Teradata
 
From:   Ananta Kishore Narahari

Hi All,

When you Specify a Single PI the teradata is going to create a hash map based on your PI and also the Retrieval happens in the reverse way storing in the Database

I have one doubt, when you specify the Combination PI (Example: Acct_id and DW_EFF_TS) in the teradata then how your data will be stored in the database

If it is going to Create A hash Map based on both the PI then if i use a Query

Select * from bank_t where acct_id =101

Then how the teradata uses the Hash map to identify the AMP to locate the specified record.

Please Help Me in this regard.


Regards,

Kishore



     
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