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https://issues.apache.org/jira/browse/FLINK-10974?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16710948#comment-16710948
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ASF GitHub Bot commented on FLINK-10974:
----------------------------------------
dianfu commented on a change in pull request #7196: [FLINK-10974] [table] Add
support for flatMap to table API
URL: https://github.com/apache/flink/pull/7196#discussion_r239318443
##########
File path:
flink-libraries/flink-table/src/test/scala/org/apache/flink/table/runtime/batch/table/FlatMapITCase.scala
##########
@@ -0,0 +1,72 @@
+/*
+ * 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.table.runtime.batch.table
+
+import org.apache.flink.api.scala._
+import org.apache.flink.table.api.TableEnvironment
+import org.apache.flink.table.api.scala._
+import org.apache.flink.table.runtime.utils.TableProgramsClusterTestBase
+import
org.apache.flink.table.runtime.utils.TableProgramsTestBase.TableConfigMode
+import org.apache.flink.table.utils.TableFunc2
+import org.apache.flink.test.util.MultipleProgramsTestBase.TestExecutionMode
+import org.apache.flink.test.util.TestBaseUtils
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.junit.runners.Parameterized
+
+import scala.collection.JavaConverters._
+import scala.collection.mutable
+
+@RunWith(classOf[Parameterized])
+class FlatMapITCase(
+ mode: TestExecutionMode,
+ configMode: TableConfigMode)
+ extends TableProgramsClusterTestBase(mode, configMode) {
+
+ private def testData(env: ExecutionEnvironment): DataSet[(Int, Long,
String)] = {
+ val data = new mutable.MutableList[(Int, Long, String)]
+ data.+=((1, 1L, "Jack#22"))
+ data.+=((2, 2L, "John#333"))
+ data.+=((3, 2L, "Anna#4444"))
+ data.+=((4, 3L, "nosharp#55555"))
+ env.fromCollection(data)
+ }
+
+ @Test
+ def testFlatMap(): Unit = {
+ val env = ExecutionEnvironment.getExecutionEnvironment
+ val tEnv = TableEnvironment.getTableEnvironment(env)
+
+ val func2 = new TableFunc2
+ val results = testData(env).toTable(tEnv, 'a, 'b, 'c)
+ .flatMap(func2('c))
Review comment:
Agree. Done.
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> Add FlatMap to TableAPI
> -----------------------
>
> Key: FLINK-10974
> URL: https://issues.apache.org/jira/browse/FLINK-10974
> Project: Flink
> Issue Type: Sub-task
> Components: Table API & SQL
> Reporter: sunjincheng
> Assignee: Dian Fu
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.8.0
>
>
> Add FlatMap operator to Table API as described in [Google
> doc|https://docs.google.com/document/d/1tnpxg31EQz2-MEzSotwFzqatsB4rNLz0I-l_vPa5H4Q/edit#heading=h.q23rny2iglsr].
> The usageļ¼
> {code:java}
> val res = tab
> .flatMap(fun: TableFunction) // output has columns 'a, 'b, 'c
> .select('a, 'c)
> {code}
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