Bug 210357 Can not get sorting key if xtab has a count aggregation binding[1102]
Description: Can not get sorting key if xtab has a count aggregation binding. The filter got the same issue. Build number: 2.3.0.v20071120-0800 Steps to reproduce: 1, New a Cube 2, New a crosstab using the cube 3, Add a aggregation binding on crosstab and select the function to COUNT, leave the datafield empty 4, after step3, goto sort page and add a sorting Expected result: User can get the sorting keys Actual result: The sorting key list is empty and the filter has the same issue
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/olap/util/OlapExpressionCompiler.java
return null;
		else
			return getReferencedScriptObject( expr.getText( ), objectName );
	}
	/**
	 * 
	 * @param expr
	 * @param objectName
	 * @return
	 */
	public static String getReferencedScriptObject( String expr,
			String objectName )
	{
		if ( expr == null )
			return null;
		try
		{
			Context cx = Context.enter( );
			CompilerEnvirons ce = new CompilerEnvirons( );
			Parser p = new Parser( ce, cx.getErrorReporter( ) );
			ScriptOrFnNode tree = p.parse( expr, null, 0 );
			return getScriptObjectName( tree, objectName );
		}
		finally
		{
			Context.exit( );
		}
	}
	/**
	 *