Bug 134988 [regression]Available items in Query didn't change when change data source in Edit Data Set Dialog.
Description: Available items in Query didn't change when change data source in Edit Data Set Dialog. Steps to reproduce: 1. New two different data sources. 2. New a dataset, change data source, view Available Items in Query pane. Expected result: Available Items in Query pane changed according to new Data source. Actual result: Available Items in Query pane kept unchanged.
data/org.eclipse.birt.report.data.oda.jdbc.ui/src/org/eclipse/birt/report/data/oda/jdbc/ui/editors/SQLDataSetEditorPage.java
/**
	 * return the query text. If the query text is empty then return the pre-defined pattern
	 * 
	 * @return
	 */
	private String getQueryText( )
	{
		String queryText = this.getDataSetDesign( ).getQueryText( );
		if ( queryText != null && queryText.trim( ).length( ) > 0 )
			return queryText;
		return getQueryPresetTextString( );
	}
	
	/**
	 * Return pre-defined query text pattern with every element in a cell.
	 * 
	 * @return pre-defined query text
	 */
	private String getQueryPresetTextString( )
	{
		String[] lines = getQueryPresetTextArray( );
		String result = "";
		if ( lines != null && lines.length > 0 )
		{
			for ( int i = 0; i < lines.length; i++ )
			{
				result = result
						+ lines[i] + ( i == lines.length - 1 ? " " : " \n" );
			}
		}