Bug 201495 [Automation][Regression]The joint result of script computed column is incorrect[07]
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/executor/transform/pass/DataSetProcessUtil.java
ExpressionCompiler compiler = new ExpressionCompiler( );
		compiler.setDataSetMode( true );
		try
		{
			Context cx = Context.enter( );
			List aggrInfos = new ArrayList( );
			List aggrNames = new ArrayList( );
			for ( int i = 0; i < aggrComputedColumns.size( ); i++ )
			{
				ComputedColumn cc = (ComputedColumn) aggrComputedColumns.get( i );
				List args = cc.getAggregateArgument( );
				IBaseExpression[] exprs = null;
				int offset = 0;
				if ( cc.getExpression( ) != null )
				{
					exprs = new IBaseExpression[args.size( ) + 1];
					offset = 1;
					exprs[0] = cc.getExpression( );
				}
				else
					exprs = new IBaseExpression[args.size( )];
				for ( int j = offset; j < args.size( )+offset; j++ )
				{
					exprs[j] = (IBaseExpression) args.get( j - offset );
				}
				for ( int j = 0; j < exprs.length; j++ )
				{
					if ( exprs[j] instanceof IScriptExpression )
					{
						IScriptExpression scriptExpr = (IScriptExpression) exprs[j];