Clojure JIRA http://dev.clojure.org/jira This file is an XML representation of an issue en-us 4.4 649 25-07-2011 [JDBC-6] Add hook to allow operations on PreparedStatement prior to query execution http://dev.clojure.org/jira/browse/JDBC-6 java.jdbc <p>It would be very useful to be able to pass in a function argument to several c.j.j functions that would be called on the PreparedStatement before executing the query, for example, calling setFetchSize(). I'm not sure what the syntax should look like for this...</p> JDBC-6 Add hook to allow operations on PreparedStatement prior to query execution Enhancement Major Resolved Completed Sean Corfield Sean Corfield Thu, 26 May 2011 20:06:23 -0500 Wed, 10 Aug 2011 02:23:49 -0500 Wed, 10 Aug 2011 02:23:49 -0500 0 0 <p>I've started the work to reorganize the code to better expose the statement object for this sort of manipulation.</p> <p>Two options under consideration:</p> <ul> <li>allow raw PreparedStatement to be passed in by user where appropriate so they have complete control</li> <li>allow map of settings that would be used to create the PreparedStatement and set its options</li> </ul> <p>I like the latter better but Alan Malloy made the point that the former may still be needed for total control anyway.</p> <p>I'm leaning toward adding a function to ease creation of PreparedStatement objects to at least provide a clean API and then I'll consider how best to integrate that with the other functions.</p> <p>Added prepare-statement* to jdbc.internal which takes a connection, a SQL string and a map of options; returns a PreparedStatement. Will expose this in top-level.</p> <p>with-query-results now allows the first element in the sql-params vector to be either:</p> <ul> <li>PreparedStatement object created by the user</li> <li>map of options passed to prepare-statement* in order to create the PreparedStatement</li> </ul> <p>Options supported are in the docstring. May add additional post-creation options (beyond fetch-size and max-rows).</p> <p>Users have verified that being able to specify :fetch-size in with-query-results handles the common use cases for performance.</p> Global Rank