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From Felix Schumacher <>
Subject JDBC PreparedStatement Cache
Date Tue, 06 Sep 2016 18:08:17 GMT
Hi all,

we have a pool for PreparedStatements in AbstractJDBCTestElement, which 
has a problem with the wrapped Connections, that are returned by our 
jdbc pool. We could fix it, by unwrapping the pool-connection and using 
that as key for the cache-map "perConnCache". But this unwrapping would 
be special to the used pool implementation and we wanted to be 
independent :(

Another thing is, that since jdbc 3.0 there seems to be support for 
pooling/cacheing of PreparedStatements in the jdbc driver itself. It 
seems, that most major vendors have implemented that cache (see

Given these two bits of information I would opt to remove the 
perConnCache in order to solve bug 60085.

What do you think?


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