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PDQ limit [message #584476] Thu, 24 January 2008 00:41
Jesse Pangburn is currently offline Jesse PangburnFriend
Messages: 166
Registered: July 2009
Senior Member
Hi,
I'm using the bridge and testing PDQ against some PIX managers and have
run into a weird thing. A certain PIX manager returns something like 20
entries when you search for "chip moore" because they have the same
patient in every PIX source system's local assigning authority. While
watching the bridge process this request, I learned about "continuation"
(which for those as new to this as me, it bascially means you get part of
a result set and a pointer to the next part- you keep making requests
until you get all the data).

So I had a chance to play with the parameter to limit the size of the
result set and am thinking that someone is misunderstanding its use. When
I set the value to "5" and query against them, I see the bridge retrieving
the various patients in blocks of 5- yet it still retrieves all the
patients instead of stopping at the first 5 as I would have expected. So
I set the value to "3" to see if the block size of 5 was just coincidence,
it was not and I found that the requests returned blocks of 3 yet still
retrieved all the patients.

My conclusion is one of the following 3 cases must be true:
1. I'm misunderstanding this parameter :-) entirely possible
2. The bridge should take the first block of "3" or "5" in this case, not
do the continuation thing for the rest of the result set, and just return
the specified number of records.
3. The PIX manager should not be sending the continuation pointer (or
whatever the heck you call it) and encouraging the client to keep getting
more of the result set.

Anyone have an idea as to which case is true?

thanks,
Jesse
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