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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-2980) Add CUBE/ROLLUP/GROUPING SETS operator in Table API.
Date Mon, 23 Jan 2017 14:13:28 GMT

    [ https://issues.apache.org/jira/browse/FLINK-2980?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15834606#comment-15834606

ASF GitHub Bot commented on FLINK-2980:

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

    --- Diff: flink-libraries/flink-table/src/test/scala/org/apache/flink/api/scala/batch/table/GroupingSetsTest.scala
    @@ -0,0 +1,150 @@
    + * 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
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    +package org.apache.flink.api.scala.batch.table
    +import org.apache.flink.api.scala._
    +import org.apache.flink.api.scala.util.CollectionDataSets
    +import org.apache.flink.table.api.scala._
    +import org.apache.flink.table.api.{Table, TableConfig, TableEnvironment}
    +import org.apache.flink.test.util.TestBaseUtils
    +import org.apache.flink.types.Row
    +import org.junit._
    +import scala.collection.JavaConverters._
    +class GroupingSetsTest {
    --- End diff --
    Because we need to reduce the number of ITCases for improving the built time, I propose
a different test structure: Add a `org.apache.flink.table.runtime.dataset.DataSetAggregateITCase`
that tests grouping sets (not cube or rollup) in Scala Table API. The remaining tests can
be logical unit tests for Java Table API, Scala Table API and SQL API. You can find additional
information how we test here: https://issues.apache.org/jira/browse/FLINK-3656

> Add CUBE/ROLLUP/GROUPING SETS operator in Table API.
> ----------------------------------------------------
>                 Key: FLINK-2980
>                 URL: https://issues.apache.org/jira/browse/FLINK-2980
>             Project: Flink
>          Issue Type: New Feature
>          Components: Documentation, Table API & SQL
>            Reporter: Chengxiang Li
>            Assignee: Alexander Chermenin
>         Attachments: Cube-Rollup-GroupSet design doc in Flink.pdf
> Computing aggregates over a cube/rollup/grouping sets of several dimensions is a common
operation in data warehousing. It would be nice to have them in Table API.

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