Github user wuchong commented on a diff in the pull request:
https://github.com/apache/flink/pull/2653#discussion_r86923273
--- Diff:
flink-libraries/flink-table/src/test/java/org/apache/flink/api/java/batch/UserDefinedTableFunctionITCase.java
---
@@ -0,0 +1,156 @@
+/*
+ * 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.java.batch;
+
+import org.apache.flink.api.java.DataSet;
+import org.apache.flink.api.java.ExecutionEnvironment;
+import org.apache.flink.api.java.table.BatchTableEnvironment;
+import org.apache.flink.api.java.tuple.Tuple2;
+import org.apache.flink.api.java.tuple.Tuple5;
+import org.apache.flink.api.scala.batch.utils.TableProgramsTestBase;
+import org.apache.flink.api.table.Row;
+import org.apache.flink.api.table.Table;
+import org.apache.flink.api.table.TableEnvironment;
+import org.apache.flink.api.table.functions.TableFunction;
+import org.apache.flink.test.javaApiOperators.util.CollectionDataSets;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+
+import java.util.List;
+
+
+@RunWith(Parameterized.class)
+public class UserDefinedTableFunctionITCase extends TableProgramsTestBase {
+
+ public UserDefinedTableFunctionITCase(TestExecutionMode mode,
TableConfigMode configMode){
+ super(mode, configMode);
+ }
+
+
+ @Test
+ public void testUDTF() throws Exception {
+ ExecutionEnvironment env =
ExecutionEnvironment.getExecutionEnvironment();
+ BatchTableEnvironment tableEnv =
TableEnvironment.getTableEnvironment(env);
+
+ DataSet<Tuple5<Integer, Long, Integer, String, Long>> ds1 =
+ CollectionDataSets.getSmall5TupleDataSet(env);
+
+ Table table = tableEnv.fromDataSet(ds1, "a, b, c, d, e");
+
+ tableEnv.registerFunction("stack", new TableFunc0());
+
+ Table result = table.crossApply("stack(a,c) as (f)")
+ .select("b,f");
+
+ // with overloading
+ DataSet<Row> ds = tableEnv.toDataSet(result, Row.class);
+ List<Row> results = ds.collect();
+ String expected = "1,1\n" + "1,0\n" + "2,2\n" + "2,1\n" +
"3,2\n" + "3,2\n";
+ compareResultAsText(results, expected);
+
+ Table result2 = table.crossApply("stack(a,c,e) as (f)")
+ .select("b,f");
+
+ DataSet<Row> ds2 = tableEnv.toDataSet(result2, Row.class);
+ List<Row> results2 = ds2.collect();
+ String expected2 = "1,1\n" + "1,1\n" + "1,0\n" + "2,2\n" +
"2,2\n" + "2,1\n" +
+ "3,1\n" + "3,2\n" + "3,2\n";
+ compareResultAsText(results2, expected2);
+ }
+
+ @Test
+ public void testUDTFWithOuterApply() throws Exception {
+ ExecutionEnvironment env =
ExecutionEnvironment.getExecutionEnvironment();
+ BatchTableEnvironment tableEnv =
TableEnvironment.getTableEnvironment(env);
+
+ DataSet<Tuple5<Integer, Long, Integer, String, Long>> ds1 =
+ CollectionDataSets.getSmall5TupleDataSet(env);
+
+ Table table = tableEnv.fromDataSet(ds1, "a, b, c, d, e");
+
+ tableEnv.registerFunction("func1", new TableFunc1());
+
+ Table result = table.crossApply("func1(d) as (s,l)")
+ .select("d,s,l");
+
+ DataSet<Row> ds = tableEnv.toDataSet(result, Row.class);
+ List<Row> results = ds.collect();
+ String expected = "Hallo Welt,Welt,4\n" + "Hallo Welt
wie,Welt,4\n" +
+ "Hallo Welt wie,wie,3\n";
+ compareResultAsText(results, expected);
+
+
+ Table result2 = table.outerApply("func1(d) as (s,l)")
+ .select("d,s,l");
+
+ DataSet<Row> ds2 = tableEnv.toDataSet(result2, Row.class);
+ List<Row> results2 = ds2.collect();
+ String expected2 = "Hallo,null,null\n" + "Hallo Welt,Welt,4\n"
+ "Hallo Welt wie,Welt,4\n" +
+ "Hallo Welt wie,wie,3\n";
+ compareResultAsText(results2, expected2);
+ }
+
+ @Test
+ public void testUDTFWithScalarFunction() throws Exception {
+ ExecutionEnvironment env =
ExecutionEnvironment.getExecutionEnvironment();
+ BatchTableEnvironment tableEnv =
TableEnvironment.getTableEnvironment(env);
+
+ DataSet<Tuple5<Integer, Long, Integer, String, Long>> ds1 =
+ CollectionDataSets.getSmall5TupleDataSet(env);
+
+ Table table = tableEnv.fromDataSet(ds1, "a, b, c, d, e");
+
+ tableEnv.registerFunction("func0", new TableFunc0());
+
+ Table result = table.crossApply("func0(c, charLength(d)) as
(l)")
+ .select("d,l");
+
+ DataSet<Row> ds = tableEnv.toDataSet(result, Row.class);
+ List<Row> results = ds.collect();
+ String expected = "Hallo,0\n" + "Hallo,5\n" + "Hallo Welt,1\n"
+ "Hallo Welt,10\n" +
+ "Hallo Welt wie,2\n" + "Hallo Welt wie,14\n";
+ compareResultAsText(results, expected);
+ }
+
+
+ public static class TableFunc0 extends TableFunction<Integer> {
+ public void eval(int a, int b) {
+ collect(a);
+ collect(b);
+ }
+
+ public void eval(int a, int b, long c) {
+ collect(a);
+ collect(b);
+ collect((int) c);
+ }
+ }
+
+ public static class TableFunc1 extends TableFunction<Tuple2<String,
Integer>> {
--- End diff --
Good catch. It doesn't support POJO now. I will fix it.
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastruct...@apache.org or file a JIRA ticket
with INFRA.
---
