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Blocking on SQL Execution

From: logan(at)datacurrent(dot)com
To: pgsql-jdbc(at)postgresql(dot)org
Subject: Blocking on SQL Execution
Date: 2005-10-31 23:40:58
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-jdbc

I'm running a web application that needs to run several queries against 
several databases to satisfy a single request.  To minimize latency I'd 
like to be able to issue "<PreparedStatement Object>.executeQuery()" on 
each connection, allow the servers to execute the queries in parallel, and 
then only block when I attempt to fetch the first row.

My anecdotal experience with JDBC drivers in general are that they block 
when you attempt to execute the query, not when you attempt to retrieve 
data.  Is this the case for the Postgres driver?  Does anyone have a feel 
for how hard it would be to modify the driver allow queries to be executed 
in the background?  Thanks!

Logan Bowers

pgsql-jdbc by date

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Subject: Non-blocking SQL Execution
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