/* * 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.client.gateway.utils; import org.apache.flink.api.common.typeinfo.BasicTypeInfo; import org.apache.flink.api.common.typeinfo.TypeInformation; import org.apache.flink.table.api.Types; import org.apache.flink.table.functions.AggregateFunction; import org.apache.flink.table.functions.ScalarFunction; import org.apache.flink.table.functions.TableFunction; import org.apache.flink.types.Row; /** * A bunch of UDFs for testing the SQL Client. */ public class UserDefinedFunctions { /** * The scalar function for SQL Client test. */ public static class ScalarUDF extends ScalarFunction { private int offset; public ScalarUDF(Integer offset) { this.offset = offset; } public String eval(Integer i) { return String.valueOf(i + offset); } } /** * The aggregate function for SQL Client test. */ public static class AggregateUDF extends AggregateFunction<Long, Long> { public AggregateUDF(String name, Boolean flag, Integer value) { // do nothing } @Override public Long createAccumulator() { return 0L; } @Override public Long getValue(Long accumulator) { return 100L; } public void accumulate(Long acc, Long value) { // do nothing } @Override public TypeInformation<Long> getResultType() { return BasicTypeInfo.LONG_TYPE_INFO; } } /** * The table function for SQL Client test. */ public static class TableUDF extends TableFunction<Row> { private long extra; public TableUDF(Long extra) { this.extra = extra; } public void eval(String str) { for (String s : str.split(" ")) { Row r = new Row(2); r.setField(0, s); r.setField(1, s.length() + extra); collect(r); } } @Override public TypeInformation<Row> getResultType() { return Types.ROW(Types.STRING(), Types.LONG()); } } }