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https://issues.apache.org/jira/browse/FLINK-10974?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16710829#comment-16710829
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ASF GitHub Bot commented on FLINK-10974:
----------------------------------------
sunjincheng121 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_r239285940
##########
File path:
flink-libraries/flink-table/src/test/scala/org/apache/flink/table/api/stream/table/validation/FlatMapValidationTest.scala
##########
@@ -0,0 +1,68 @@
+/*
+ * 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.api.stream.table.validation
+
+import org.apache.flink.api.scala._
+import org.apache.flink.table.api.ValidationException
+import org.apache.flink.table.api.scala._
+import org.apache.flink.table.expressions.utils.Func15
+import
org.apache.flink.table.runtime.utils.JavaUserDefinedAggFunctions.WeightedAvg
+import org.apache.flink.table.utils.{TableFunc0, TableTestBase}
+import org.junit.Test
+
+class FlatMapValidationTest extends TableTestBase {
+
+ @Test(expected = classOf[ValidationException])
+ def testInvalidMapFunctionTypeAggregation(): Unit = {
+ val util = streamTestUtil()
+ util.addTable[(Int)](
+ "MyTable", 'int)
+ .flatMap('int.sum) // do not support AggregateFunction as input
Review comment:
add `.flatMap('int) ` test case ?
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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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