[
http://issues.apache.org/jira/browse/IBATIS-53?page=comments#action_12420559 ]
vishakha sawant commented on IBATIS-53:
---------------------------------------
Hi
We are using a patch version iBatis for REF CURSOR. We are using legacy database
we are getting exception "Cursor is closed" while executing a procedure.
stack trace of that exception is
java.sql.SQLException : Cursor is closed.
at
oracle.jdbc.driver.T4CResultSetAccessor.getCursor(T4CResultSetAccessor.java:271)
at oracle.jdbc.driver.ResultSetAccessor.getObject(ResultSetAccessor.java:94)
at oracle.jdbc.driver.OracleCallableStatement.getObject
(OracleCallableStatement.java:1368)
at test.TestSPA.main(TestSPA.java:95)
After doing some R&D I found that the if cursor is 'OUT' parameter and that is
not opened in procedure, it will result in this exception. According to stack
trace I found that in retrieveOutputParameters() method of
com.ibatis.sqlmap.engine.execution.SqlExecutor.java cs.getObject(i+1) is
causing this exception. For a time being we are catching that exception so that
we can retrieve other OUT values from procedure. Is there any other way to
resolve this issue?
It's urgent.
Regards,
Vishakha Sawant
> Support for oracle cursors as resultsets
> ----------------------------------------
>
> Key: IBATIS-53
> URL: http://issues.apache.org/jira/browse/IBATIS-53
> Project: iBatis for Java
> Type: New Feature
> Components: SQL Maps
> Reporter: Ken Katsma
> Priority: Minor
> Fix For: 2.1.0
> Attachments: SqlExecutor.java, SqlExecutor.java, SqlExecutor.java,
> SqlExecutor.java, showcase.txt, showcase_storedprocedure.txt,
> showcase_storedprocedure1.txt
>
> iBatis doesn't currently support result sets from functions in Oracle. A
> modification to SQLExecutor as detailed below can add the necessary support.
> However, it requires a hard-coded check for an Oracle driver. A better
> option would be to supply a factory for alternate SQLExecutor's for different
> dialects. This would allow for any future database specific customization as
> well.
> The code change is in SQLExecutor.executeQueryProcedure (see comments):
> public void executeQueryProcedure(RequestScope request, Connection conn,
> String sql, Object[] parameters,
> int skipResults, int maxResults,
> RowHandlerCallback callback)
> throws SQLException {
> ErrorContext errorContext = request.getErrorContext();
> errorContext.setActivity("executing query procedure");
> errorContext.setObjectId(sql);
> CallableStatement cs = null;
> ResultSet rs = null;
> try {
> errorContext.setMoreInfo("Check the SQL Statement (preparation
> failed).");
> cs = conn.prepareCall(sql);
> ParameterMap parameterMap = request.getParameterMap();
> ParameterMapping[] mappings = parameterMap.getParameterMappings();
> errorContext.setMoreInfo("Check the output parameters (register output
> parameters failed).");
> registerOutputParameters(cs, mappings);
> errorContext.setMoreInfo("Check the parameters (set parameters
> failed).");
> parameterMap.setParameters(request, cs, parameters);
> errorContext.setMoreInfo("Check the statement (update procedure
> failed).");
> // ****************************************
> // Code changes below
> // ****************************************
> if
> (conn.getMetaData().getDatabaseProductName().equalsIgnoreCase("Oracle"))
> {
> // If in oracle then execute instead of executeQuery
> boolean b = cs.execute();
> errorContext.setMoreInfo("In Oracle query mode.");
> errorContext.setMoreInfo("Check the output parameters (retrieval of
> output parameters failed).");
> // Get the output parameters first, instead of last
> retrieveOutputParameters(cs, mappings, parameters);
> // Then find the resultset and handle it
> for (int i=0;i<parameters.length;i++)
> {
> if (parameters[i] instanceof ResultSet)
> {
> rs = (ResultSet) parameters[i];
> break;
> }
> }
> errorContext.setMoreInfo("Check the results (failed to retrieve
> results).");
> handleResults(request, rs, skipResults, maxResults, callback);
> }
> //****************************************
> // Non-oracle..original code
> else
> {
>
> errorContext.setMoreInfo("In non-Oracle mode.");
> rs = cs.executeQuery();
> errorContext.setMoreInfo("Check the results (failed to retrieve
> results).");
> handleResults(request, rs, skipResults, maxResults, callback);
> errorContext.setMoreInfo("Check the output parameters (retrieval of
> output parameters failed).");
> retrieveOutputParameters(cs, mappings, parameters);
> }
> } finally {
> try {
> closeResultSet(rs);
> } finally {
> closeStatement(cs);
> }
> }
> An example mapping looks like:
> <parameterMap id="clientParameters" class="map" >
> <parameter property="result" jdbcType="ORACLECURSOR" mode="OUT"/>
> <parameter property="maxRows" jdbcType="VARCHAR"
> javaType="java.lang.String" mode="IN"/>
> </parameterMap>
> <procedure id="getClientListProc" resultMap="clientResult"
> parameterMap="clientParameters">
> {?= call abc.CLIENT_VIEW_PKG.client_result_list_f(?)}
> </procedure>
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