hanyuzheng7 commented on code in PR #22842: URL: https://github.com/apache/flink/pull/22842#discussion_r1507128713
########## flink-table/flink-table-runtime/src/main/java/org/apache/flink/table/runtime/functions/scalar/MapUnionFunction.java: ########## @@ -0,0 +1,161 @@ +/* + * 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.functions.scalar; + +import org.apache.flink.annotation.Internal; +import org.apache.flink.table.api.DataTypes; +import org.apache.flink.table.data.ArrayData; +import org.apache.flink.table.data.GenericArrayData; +import org.apache.flink.table.data.MapData; +import org.apache.flink.table.functions.BuiltInFunctionDefinitions; +import org.apache.flink.table.functions.FunctionContext; +import org.apache.flink.table.functions.SpecializedFunction; +import org.apache.flink.table.types.DataType; +import org.apache.flink.table.types.KeyValueDataType; +import org.apache.flink.util.FlinkRuntimeException; + +import javax.annotation.Nullable; + +import java.lang.invoke.MethodHandle; +import java.util.ArrayList; +import java.util.List; + +import static org.apache.flink.table.api.Expressions.$; + +/** Implementation of {@link BuiltInFunctionDefinitions#MAP_UNION}. */ +@Internal +public class MapUnionFunction extends BuiltInScalarFunction { + private final ArrayData.ElementGetter keyElementGetter; + private final ArrayData.ElementGetter valueElementGetter; + + private final SpecializedFunction.ExpressionEvaluator keyEqualityEvaluator; + private transient MethodHandle keyEqualityHandle; + + public MapUnionFunction(SpecializedFunction.SpecializedContext context) { + super(BuiltInFunctionDefinitions.MAP_UNION, context); + KeyValueDataType outputType = + ((KeyValueDataType) context.getCallContext().getOutputDataType().get()); + final DataType keyDataType = outputType.getKeyDataType(); + final DataType valueDataType = outputType.getValueDataType(); + keyElementGetter = + ArrayData.createElementGetter(outputType.getKeyDataType().getLogicalType()); + valueElementGetter = + ArrayData.createElementGetter(outputType.getValueDataType().getLogicalType()); + keyEqualityEvaluator = + context.createEvaluator( + $("element1").isEqual($("element2")), + DataTypes.BOOLEAN(), + DataTypes.FIELD("element1", keyDataType.notNull().toInternal()), + DataTypes.FIELD("element2", keyDataType.notNull().toInternal())); + } + + @Override + public void open(FunctionContext context) throws Exception { + keyEqualityHandle = keyEqualityEvaluator.open(context); + } + + public @Nullable MapData eval(@Nullable MapData... maps) { + try { + if (maps == null || maps.length == 0) { + return null; + } + if (maps.length == 1) { + return maps[0]; + } + MapData result = maps[0]; + for (int i = 1; i < maps.length; ++i) { + MapData map = maps[i]; + if (map != null && map.size() > 0) { + result = new MapDataForMapUnion(result, map); + } + } + return result; + } catch (Throwable t) { + throw new FlinkRuntimeException(t); + } + } + + private class MapDataForMapUnion implements MapData { + private final GenericArrayData keysArray; + private final GenericArrayData valuesArray; + + public MapDataForMapUnion(MapData map1, MapData map2) throws Throwable { + List<Object> keysList = new ArrayList<>(); + List<Object> valuesList = new ArrayList<>(); + boolean isKeyNullExist = false; + for (int i = 0; i < map2.size(); i++) { + Object key = keyElementGetter.getElementOrNull(map2.keyArray(), i); Review Comment: Ok, I will extracted it. ########## flink-table/flink-table-runtime/src/main/java/org/apache/flink/table/runtime/functions/scalar/MapUnionFunction.java: ########## @@ -0,0 +1,161 @@ +/* + * 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.functions.scalar; + +import org.apache.flink.annotation.Internal; +import org.apache.flink.table.api.DataTypes; +import org.apache.flink.table.data.ArrayData; +import org.apache.flink.table.data.GenericArrayData; +import org.apache.flink.table.data.MapData; +import org.apache.flink.table.functions.BuiltInFunctionDefinitions; +import org.apache.flink.table.functions.FunctionContext; +import org.apache.flink.table.functions.SpecializedFunction; +import org.apache.flink.table.types.DataType; +import org.apache.flink.table.types.KeyValueDataType; +import org.apache.flink.util.FlinkRuntimeException; + +import javax.annotation.Nullable; + +import java.lang.invoke.MethodHandle; +import java.util.ArrayList; +import java.util.List; + +import static org.apache.flink.table.api.Expressions.$; + +/** Implementation of {@link BuiltInFunctionDefinitions#MAP_UNION}. */ +@Internal +public class MapUnionFunction extends BuiltInScalarFunction { + private final ArrayData.ElementGetter keyElementGetter; + private final ArrayData.ElementGetter valueElementGetter; + + private final SpecializedFunction.ExpressionEvaluator keyEqualityEvaluator; + private transient MethodHandle keyEqualityHandle; + + public MapUnionFunction(SpecializedFunction.SpecializedContext context) { + super(BuiltInFunctionDefinitions.MAP_UNION, context); + KeyValueDataType outputType = + ((KeyValueDataType) context.getCallContext().getOutputDataType().get()); + final DataType keyDataType = outputType.getKeyDataType(); + final DataType valueDataType = outputType.getValueDataType(); + keyElementGetter = + ArrayData.createElementGetter(outputType.getKeyDataType().getLogicalType()); + valueElementGetter = + ArrayData.createElementGetter(outputType.getValueDataType().getLogicalType()); + keyEqualityEvaluator = + context.createEvaluator( + $("element1").isEqual($("element2")), + DataTypes.BOOLEAN(), + DataTypes.FIELD("element1", keyDataType.notNull().toInternal()), + DataTypes.FIELD("element2", keyDataType.notNull().toInternal())); + } + + @Override + public void open(FunctionContext context) throws Exception { + keyEqualityHandle = keyEqualityEvaluator.open(context); + } + + public @Nullable MapData eval(@Nullable MapData... maps) { + try { + if (maps == null || maps.length == 0) { + return null; + } + if (maps.length == 1) { + return maps[0]; + } + MapData result = maps[0]; + for (int i = 1; i < maps.length; ++i) { + MapData map = maps[i]; + if (map != null && map.size() > 0) { + result = new MapDataForMapUnion(result, map); + } + } + return result; + } catch (Throwable t) { + throw new FlinkRuntimeException(t); + } + } + + private class MapDataForMapUnion implements MapData { + private final GenericArrayData keysArray; + private final GenericArrayData valuesArray; + + public MapDataForMapUnion(MapData map1, MapData map2) throws Throwable { + List<Object> keysList = new ArrayList<>(); + List<Object> valuesList = new ArrayList<>(); + boolean isKeyNullExist = false; + for (int i = 0; i < map2.size(); i++) { + Object key = keyElementGetter.getElementOrNull(map2.keyArray(), i); + if (key == null) { + isKeyNullExist = true; + } + keysList.add(key); + valuesList.add(valueElementGetter.getElementOrNull(map2.valueArray(), i)); Review Comment: ok -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: issues-unsubscr...@flink.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
