String[]field=yAxis.stream().map(y->"CAST("+y.getSummary()+"("+y.getOriginName()+") AS DECIMAL(20,2)) AS _"+y.getSummary()+"_"+y.getOriginName()).toArray(String[]::new);
// String[] field = yAxis.stream().map(y -> "CAST(" + y.getSummary() + "(" + y.getOriginName() + ") AS DECIMAL(20,2)) AS _" + y.getSummary() + "_" + y.getOriginName()).toArray(String[]::new);