| ############################################################################ |
| # Licensed to the Apache Software Foundation (ASF) under one or more |
| # contributor license agreements. See the NOTICE file distributed with |
| # this work for additional information regarding copyright ownership. |
| # The ASF licenses this file to You under the Apache License, Version 2.0 |
| # (the "License"); you may not use this file except in compliance with |
| # the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| # |
| ############################################################################ |
| require 'pigudf' |
| |
| class Myudfs < PigUdf |
| def square num |
| return num**2 if num |
| end |
| |
| def cube num |
| return num**3 if num |
| end |
| |
| output_schema_function :rev_schema |
| |
| def reverse e1, e2 |
| [e2,e1] |
| end |
| |
| def rev_schema s |
| Schema.t([s[1],s[0]]) |
| end |
| end |
| |
| CUBE = PigUdf.evalfunc("x:int") do |v| |
| v**3 |
| end |
| |
| ISEVEN = PigUdf.filterfunc do |v| |
| v % 2 == 0 |
| end |
| |
| class AppendIndex < AccumulatorPigUdf |
| outputSchema do |inS| |
| inS.in.in.add! Schema.long |
| inS |
| end |
| |
| def initialize |
| @ct = 0 |
| @inter = DataBag.new |
| end |
| |
| def exec b |
| b.each { |t| @inter.add(t << (@ct+=1)) } |
| end |
| |
| def get |
| @inter |
| end |
| end |