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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-4541) Support for SQL NOT IN operator
Date Thu, 24 Nov 2016 12:14:59 GMT

    [ https://issues.apache.org/jira/browse/FLINK-4541?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15693131#comment-15693131
] 

ASF GitHub Bot commented on FLINK-4541:
---------------------------------------

Github user fhueske commented on a diff in the pull request:

    https://github.com/apache/flink/pull/2811#discussion_r89483428
  
    --- Diff: flink-libraries/flink-table/src/main/scala/org/apache/flink/api/table/runtime/RichMapRunner.scala
---
    @@ -0,0 +1,52 @@
    +/*
    + * 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.
    + */
    +
    +package org.apache.flink.api.table.runtime
    +
    +import org.apache.flink.api.common.functions.RichMapFunction
    +import org.apache.flink.api.common.typeinfo.TypeInformation
    +import org.apache.flink.api.java.typeutils.ResultTypeQueryable
    +import org.apache.flink.configuration.Configuration
    +import org.slf4j.LoggerFactory
    +
    +class RichMapRunner[IN, OUT](
    --- End diff --
    
    I think we need two map join runner classes, one for each side of the broadcasted value.
Could be named `MapJoinLeftRunner` and `MapJoinRightRunner`.


> Support for SQL NOT IN operator
> -------------------------------
>
>                 Key: FLINK-4541
>                 URL: https://issues.apache.org/jira/browse/FLINK-4541
>             Project: Flink
>          Issue Type: Improvement
>          Components: Table API & SQL
>            Reporter: Timo Walther
>            Assignee: Alexander Shoshin
>
> This should work:
> {code}
> def main(args: Array[String]): Unit = {
>     // set up execution environment
>     val env = ExecutionEnvironment.getExecutionEnvironment
>     val tEnv = TableEnvironment.getTableEnvironment(env)
>     val input = env.fromElements(WC("hello", 1), WC("hello", 1), WC("ciao", 1))
>     // register the DataSet as table "WordCount"
>     tEnv.registerDataSet("WordCount", input, 'word, 'frequency)
>     tEnv.registerTable("WordCount2", tEnv.fromDataSet(input, 'word, 'frequency).select('word).filter('word
!== "hello"))
>     // run a SQL query on the Table and retrieve the result as a new Table
>     val table = tEnv.sql("SELECT word, SUM(frequency) FROM WordCount WHERE word NOT IN
(SELECT word FROM WordCount2) GROUP BY word")
>     table.toDataSet[WC].print()
>   }
> {code}



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