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From "Matthew Baird" <Matthew.Ba...@motiva.com>
Subject RE: Scrollable Resultsets in JdbcAccess
Date Mon, 03 Feb 2003 18:21:10 GMT
this seems to be fixed in the latest CVS

-----Original Message-----
From: lcheng@gmx.net [mailto:lcheng@gmx.net]
Sent: Friday, January 31, 2003 2:45 AM
To: OJB Developers List
Subject: Scrollable Resultsets in JdbcAccess


hi!

is anybody able to answer my question? i posted it some times ago, but
obviously nobody
could react. i think matthew has made the change. could you help me out? 

regards,
liang  

> hi!
> 
> As of OJB 0.9.8 the scrollable flag in method JDBCAccess.executeSQL() has
> been set from 
> Query.SCROLLABLE to Query.NOT_SCROLLABLE, which causes RsIterator.size()
> always to
> use count(*) method to determine the size although the JDBC driver
> supports
> it.
> 
> 	public int size() throws PersistenceBrokerException
> 	{
> 		int retval = 0; // default size is 0;
> 		boolean forwardOnly = true;
> 		try
> 		{
> # forwardOnly flag yields true			forwardOnly =
> m_rsAndStmt.m_stmt.getResultSetType() == ResultSet.TYPE_FORWARD_ONLY;
> 		}
> 		catch (SQLException e)
> 		{
> 		}
> 		if (!supportsAdvancedJDBCCursorControl()
> 			||
>
PlatformFactory.getPlatformFor(m_cld.getConnectionDescriptor()).useCountForResultsetSize()
> 			|| forwardOnly)
> 		{
> 			/**
> 			 * MBAIRD: doesn't support the .last .getRow method, use the .getCount
> on
> the
> 			 * persistenceBroker which executes a count(*) query.
> 			 */
> 			if (logger.isDebugEnabled()) logger.debug("Executing count(*) to get
> size()");
> 			retval = countedSize();
> 		}
> 		else
> 		...
> 
> Why has to been changed and how can i force size() not to take the
> count(*)
> method?
> 
> thanks,
> 
> Liang Cheng

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