Bug 177091 Can't access stored procedure defined in Oracle Package
1.setup an oracle connection 2.try to call a stored procedure defined in package
data/org.eclipse.birt.report.data.oda.jdbc/src/org/eclipse/birt/report/data/oda/jdbc/CallStatement.java
* be returned otherwise for a pseudo resultSet.
	 */
	private java.sql.ResultSet getOutputParamResultSet( ) throws OdaException,
			SQLException
	{
		if ( parameterDefn != null )
		{
			for ( int i = 0; i < parameterDefn.getParameterCount( ); i++ )
			{
				if ( parameterDefn.getParameterMode( i ) == IParameterMetaData.parameterModeOut )
				{
					Object expected = callStat.getObject( i + 1 );
					if ( expected instanceof java.sql.ResultSet )
						return (java.sql.ResultSet) expected;
				}
			}
		}
		return null;
	}
	
	/**
	 * get paremeter metadata for callableStatement, if metadata is null or data
	 * mode is unknown or SQLException is thrown, register output parameter on
	 * DatabaseMetadata, else register output paremeter on statement's metadata.
	 * 
	 * @throws OdaException
	 */
	private void registerOutputParameter( ) throws OdaException
	{