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Advantage of Updating record using Db key instead of CALC

 
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Shaheen Kalokhe

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Joined: 21 Feb 2008
Posts: 21
Location: India

PostPosted: Thu Feb 21, 2008 6:07 pm    Post subject: Advantage of Updating record using Db key instead of CALC
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Hello,

I would like to know the advantage of Updating a record using its DB Key
instead of CALC key. Does anyone has any idea of the time saved by using Db key based updates.

Thanks

Shaheen
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puviarasu

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Joined: 10 Mar 2008
Posts: 4
Location: India

PostPosted: Tue Mar 11, 2008 7:13 pm    Post subject: Using DB-KEY is advantageous
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Updating a record using DB-KEY is advantageous since the DB-KEY is the address of the particular record. Its the Page number + line number of that record. So if you try to update a record using the DB-KEY it will locate the record using this key value which is straight forward.

But when u update the same record using the CALC key, it should locate the record based on the calcing logic... which might require few more operations and consume more CPU time... which will be slightly slower than the first one...
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Shaheen Kalokhe

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Joined: 21 Feb 2008
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PostPosted: Tue Mar 11, 2008 9:14 pm    Post subject: Re: Using DB-KEY is advantageous
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Thanks for uri reply puviarasu

But what exactly i am looking for is the time difference. I already know that update using DB-Key is efficient. If ua have some details pertaining to time pals do reply.

Thanks

Shaheen
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puviarasu

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PostPosted: Tue Mar 11, 2008 9:46 pm    Post subject: Regarding Time Difference
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I don't have the detail regarding the time difference for this particular scenario. I can suggest one thing while coding a batch program we can retrieve the TIMESTAMP before and after the execution of the DML statements(bulk) using the DB-KEY/CALC-KEY which might give the time difference.
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