Bug 123915 Add table-fetch limitation when DataSet Editor is populating table names.
When fetch table names from database of large volume of data, there lies a possibility that the editor window will be frozen because of the population of huge number of table names. This should be enhanced. A handy solution might be limiting the number of table names being fetched each schema.
data/org.eclipse.birt.report.data.oda.jdbc.ui/src/org/eclipse/birt/report/data/oda/jdbc/ui/editors/SQLDataSetEditorPage.java
}
            
        });
        
		filterComboViewer.setInput(dbTypeList);
		
		
		filterComboViewer.getCombo().select(0);
	}
	/*
	 * This method is invoked when the find button is clicked
	 * It populates the Available Data Base obecets ( in the Tree control ) 
	 * 
	 */
	protected void populateAvailableDbObjects()
	{
		
		OdaDataSourceHandle curDataSourceHandle = (OdaDataSourceHandle) ((OdaDataSetHandle) getContainer( ).getModel( )).getDataSource();
		
		if ( curDataSourceHandle == prevDataSourceHandle )
		{
			if ( ( cachedSearchTxt == searchTxt.getText( ) || ( cachedSearchTxt != null && cachedSearchTxt.equals( searchTxt.getText( ) ) ) )
					&& ( cachedDbType == getSelectedDbType( ) || ( cachedDbType != null && cachedDbType.equals( getSelectedDbType( ) ) ) ) )
			{
				if ( schemaList != null && schemaList.size( ) > 0 )
				{
					if ( cachedSchemaComboIndex == schemaCombo.getSelectionIndex( ) )
					{
						return;
					}