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
{
			int numberOfSchema = 0;
			Preferences preferences = JdbcPlugin.getDefault( )
					.getPluginPreferences( );
			if ( preferences.contains( DateSetPreferencePage.USER_MAX_NUM_OF_SCHEMA ) )
			{
				numberOfSchema = preferences.getInt( DateSetPreferencePage.USER_MAX_NUM_OF_SCHEMA );
			}
			else
			{
				numberOfSchema = DateSetPreferencePage.DEFAULT_MAX_NUM_OF_SCHEMA;
				preferences.setValue( DateSetPreferencePage.USER_MAX_NUM_OF_SCHEMA,
						numberOfSchema );
			}
			cachedSchemaComboIndex = schemaCombo.getSelectionIndex();
			if ( schemaCombo.getSelectionIndex() == 0)
			{
				targetSchemaList = schemaList;
			}
			else
			{
				targetSchemaList.add( schemaCombo.getItem( schemaCombo.getSelectionIndex() ));
				numberOfSchema = 1;
			}
			for ( int i = 0; i < targetSchemaList.size( ) && i < numberOfSchema; i++ )
			{
				String schemaName = (String) targetSchemaList.get( i );
				DbObject schemaObj = new DbObject( schemaName,
						schemaName,
						DbObject.SCHEMA_TYPE,