Bug 126390 IDataSetInstance needs method to return column information
There is no way to get the Java equivalent of the JavaScript columnDefns array, which describes the columns in a data set.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/script/internal/instance/DataSetInstance.java
{
			dataSet.setQueryText( queryText );
		} catch ( BirtException e )
		{
			throw new ScriptException( e.getLocalizedMessage( ) );
		}
	}
	/**
	 * @see org.eclipse.birt.report.engine.api.script.instance.IDataSetInstance#getAllExtensionProperties()
	 */
	public Map getAllExtensionProperties()
	{
		return dataSet.getAllExtensionProperties();
	}
	/**
	 * @see org.eclipse.birt.report.engine.api.script.instance.IDataSetInstance#getExtensionProperty(java.lang.String)
	 */
	public String getExtensionProperty(String name)
	{
		return dataSet.getExtensionProperty(name);
	}
	/**
	 * @see org.eclipse.birt.report.engine.api.script.instance.IDataSetInstance#setExtensionProperty(java.lang.String, java.lang.String)
	 */
	public void setExtensionProperty(String name, String value)
	{
		dataSet.setExtensionProperty( name, value );
	}
}