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Not clear on what PQgetResult does - Mailing list pgsql-interfaces

From David Rysdam
Subject Not clear on what PQgetResult does
Date
Msg-id 437CD359.5080908@ll.mit.edu
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Responses Re: Not clear on what PQgetResult does  (Tom Lane <tgl@sss.pgh.pa.us>)
Re: Not clear on what PQgetResult does  (Brett Schwarz <brett_schwarz@yahoo.com>)
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I don't understand in what sense PQgetResult is asynchronous.  Obviously 
PQsendQuery returns immediately and apparently PQgetResult() allows me 
to get separate results from multiple queries submitted together, but...

Let's say I have a table with 1,000,000 rows and I PQsendQuery() a query 
to get them all.  When I call PQgetResult() the first time, will it 
block until all 1,000,000 are ready, or will it send back everything 
that's ready at the time I call it?

If the latter, is pgtcl's pg_getresult supposed to work the same way?

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