Bug 199021 Error message pops up several times when click an invalid dataset
Description: There is a sqlserver datasource and dataset, remove the jtds driver to let the dataset invalid. Double click on the dataset, the error message will pop up serveral times. Build version:2.2.0.v20070807-0630 Steps to reproduce: 1. Create a sqlserver datasource and dataset. 2. Remove the jtds driver, and the dataset will be invalid. 3. Double click on the dataset. Expect result: Error message pops up once to indicate the problem. Actual result: Error message pops up serveral times.
data/org.eclipse.birt.report.data.oda.jdbc.ui/src/org/eclipse/birt/report/data/oda/jdbc/ui/editors/SQLDataSetEditorPage.java
isPageInitialization = !isPageInitialization;
		}
	}
	/**
	 * 
	 * @param schemaName
	 * @return
	 */
	private boolean containsTableInSchema( String schemaName )
	{
		ResultSet rs = metaDataProvider.getAlltables( metaDataProvider.getCatalog( ),
				schemaName,
				"%",
				new String[]{
						"TABLE", "VIEW"
				} );
		boolean hasNonSystemTable = false;
		if ( rs != null )
		{
			try
			{
				while ( rs.next( ) )
				{
					if ( !"SYSTEM TABLE".equalsIgnoreCase( rs.getString( "TABLE_TYPE" ) ) )
					{
						hasNonSystemTable = true;
						break;
					}
				}
			}