Bug 160650 IDataExtractionTask.selectColumns() doesn't work.
Description: IDataExtractionTask.selectColumns() doesn't work. Steps to reproduce: Codes: String[] columns={"code","territory"}; task.selectResultSet( "t1" ); task.selectColumns(columns ); IExtractionResults result = task.extract( ); assertEquals(2,result.getResultMetaData( ).getColumnCount( )); Covered in DataExtractionTaskTest.testMethods() case. Expected result: Column count is 2. Actual result: Column count is 3.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/api/impl/ResultMetaData.java
{
		String name;
		int type;
		MetaDataEntry( String name, int type )
		{
			this.name = name;
			this.type = type;
		}
	}
	protected void appendMetaData( IBaseQueryDefinition query )
	{
		Map bindings = query.getResultSetExpressions( );
		Iterator iter = bindings.entrySet( ).iterator( );
		while ( iter.hasNext( ) )