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[FLINK-32261][table] Add built-in MAP_UNION function
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119 changes: 119 additions & 0 deletions
119
.../org/apache/flink/table/types/inference/strategies/CommonCollectionInputTypeStrategy.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,119 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
|
|
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| package org.apache.flink.table.types.inference.strategies; | ||
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| import org.apache.flink.annotation.Internal; | ||
| import org.apache.flink.table.functions.FunctionDefinition; | ||
| import org.apache.flink.table.types.DataType; | ||
| import org.apache.flink.table.types.inference.ArgumentCount; | ||
| import org.apache.flink.table.types.inference.CallContext; | ||
| import org.apache.flink.table.types.inference.InputTypeStrategy; | ||
| import org.apache.flink.table.types.inference.Signature; | ||
| import org.apache.flink.table.types.inference.Signature.Argument; | ||
| import org.apache.flink.table.types.logical.LegacyTypeInformationType; | ||
| import org.apache.flink.table.types.logical.LogicalType; | ||
| import org.apache.flink.table.types.logical.LogicalTypeRoot; | ||
| import org.apache.flink.table.types.logical.utils.LogicalTypeMerging; | ||
| import org.apache.flink.table.types.utils.TypeConversions; | ||
|
|
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| import java.util.ArrayList; | ||
| import java.util.Collections; | ||
| import java.util.List; | ||
| import java.util.Optional; | ||
| import java.util.stream.Collectors; | ||
| import java.util.stream.IntStream; | ||
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| /** An {@link InputTypeStrategy} that expects that all arguments have a common type. */ | ||
| @Internal | ||
| public class CommonCollectionInputTypeStrategy implements InputTypeStrategy { | ||
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| private static final Argument COMMON_ARGUMENT = Argument.ofGroup("COMMON"); | ||
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| private final ArgumentCount argumentCount; | ||
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| private final LogicalTypeRoot logicalTypeRoot; | ||
| private final String errorMessage; | ||
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| public CommonCollectionInputTypeStrategy( | ||
| ArgumentCount argumentCount, String errorMessage, LogicalTypeRoot logicalTypeRoot) { | ||
| this.argumentCount = argumentCount; | ||
| this.errorMessage = errorMessage; | ||
| this.logicalTypeRoot = logicalTypeRoot; | ||
| } | ||
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| @Override | ||
| public ArgumentCount getArgumentCount() { | ||
| return argumentCount; | ||
| } | ||
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| @Override | ||
| public Optional<List<DataType>> inferInputTypes( | ||
| CallContext callContext, boolean throwOnFailure) { | ||
| List<DataType> argumentDataTypes = callContext.getArgumentDataTypes(); | ||
| List<LogicalType> argumentTypes = | ||
| argumentDataTypes.stream() | ||
| .map(DataType::getLogicalType) | ||
| .collect(Collectors.toList()); | ||
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| if (!argumentTypes.stream().allMatch(logicalType -> logicalType.is(logicalTypeRoot))) { | ||
| return callContext.fail(throwOnFailure, errorMessage); | ||
| } | ||
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| if (argumentTypes.stream().anyMatch(CommonCollectionInputTypeStrategy::isLegacyType)) { | ||
| return Optional.of(argumentDataTypes); | ||
| } | ||
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| Optional<LogicalType> commonType = LogicalTypeMerging.findCommonType(argumentTypes); | ||
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| if (!commonType.isPresent()) { | ||
| return callContext.fail( | ||
| throwOnFailure, | ||
| "Could not find a common type for arguments: %s", | ||
| argumentDataTypes); | ||
| } | ||
|
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| return commonType.map( | ||
| type -> | ||
| Collections.nCopies( | ||
| argumentTypes.size(), TypeConversions.fromLogicalToDataType(type))); | ||
| } | ||
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| @Override | ||
| public List<Signature> getExpectedSignatures(FunctionDefinition definition) { | ||
| Optional<Integer> minCount = argumentCount.getMinCount(); | ||
| Optional<Integer> maxCount = argumentCount.getMaxCount(); | ||
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| int numberOfMandatoryArguments = minCount.orElse(0); | ||
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| if (maxCount.isPresent()) { | ||
| return IntStream.range(numberOfMandatoryArguments, maxCount.get() + 1) | ||
| .mapToObj(count -> Signature.of(Collections.nCopies(count, COMMON_ARGUMENT))) | ||
| .collect(Collectors.toList()); | ||
| } | ||
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| List<Argument> arguments = | ||
| new ArrayList<>(Collections.nCopies(numberOfMandatoryArguments, COMMON_ARGUMENT)); | ||
| arguments.add(Argument.ofGroupVarying("COMMON")); | ||
| return Collections.singletonList(Signature.of(arguments)); | ||
| } | ||
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| private static boolean isLegacyType(LogicalType type) { | ||
| return type instanceof LegacyTypeInformationType; | ||
| } | ||
| } |
33 changes: 33 additions & 0 deletions
33
...in/java/org/apache/flink/table/types/inference/strategies/CommonMapInputTypeStrategy.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,33 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
|
|
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| package org.apache.flink.table.types.inference.strategies; | ||
|
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| import org.apache.flink.annotation.Internal; | ||
| import org.apache.flink.table.types.inference.ArgumentCount; | ||
| import org.apache.flink.table.types.inference.InputTypeStrategy; | ||
| import org.apache.flink.table.types.logical.LogicalTypeRoot; | ||
|
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| /** An {@link InputTypeStrategy} that expects that all arguments have a common map type. */ | ||
| @Internal | ||
| public final class CommonMapInputTypeStrategy extends CommonCollectionInputTypeStrategy { | ||
|
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| public CommonMapInputTypeStrategy(ArgumentCount argumentCount) { | ||
| super(argumentCount, "All arguments requires to be a MAP type", LogicalTypeRoot.MAP); | ||
| } | ||
| } |
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