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remote request/ distribution request

Posted by Anonymous User

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Anonymous User

remote request/ distribution request
May 21, 2006 01:45PM

IP/Host: ---.saix.net

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I am unsure whether a remote request can access in its one SQL statement both a database that is non-remote (ie. at its own computer) as well as a database that is remote?
Or can only a distributed request do this?
This is why I am having a problem understanding Ass3 Ques 1.6 and 1.10

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stevenv

Re: remote request/ distribution request
May 21, 2006 02:56PM

IP/Host: ---.saix.net
Registered: 18 years ago
Posts: 613
Rating: 0

My understanding is that a remote request is one that can be processed by a single data processor (see bottom of pg 485). I think that we can presume that the remote request can alternatively access data at a local DP.

The difference with the distributed request is that it can access several DPs with a single SQL statement (local and/or remote).

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Anonymous User

Re: remote request/ distribution request
May 21, 2006 05:26PM

IP/Host: ---.saix.net

Rating: 0

I am not fully understanding your explanation.
When you say "..can alternatively access data at a local DP" do you mean that either it can access a local DP or remote DP but not both in one statement?
Am I understanding you correctly?
Thanks

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stevenv

Re: remote request/ distribution request
May 22, 2006 11:30AM

IP/Host: ---.saix.net
Registered: 18 years ago
Posts: 613
Rating: 0

What I mean is that a remote request is one that can be processed by only a single data processor i.e. a remote request can't access both a local and remote or two remote data processors at the same time because then it wouldn't be accessing a single DP. If the request were of this type it would have to be considered a distributed request because of the multiple DP access.