lcspinter commented on a change in pull request #2333: URL: https://github.com/apache/hive/pull/2333#discussion_r643752741
########## File path: ql/src/java/org/apache/hadoop/hive/ql/parse/PartitionTransform.java ########## @@ -0,0 +1,79 @@ +/* + * 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.hadoop.hive.ql.parse; + +import java.util.ArrayList; +import java.util.List; +import java.util.Map; +import java.util.stream.Collectors; +import java.util.stream.Stream; + +public class PartitionTransform { + + private static final Map<Integer, TransformTypes> TRANSFORMS = Stream + .of(new Object[][] { { HiveParser.TOK_IDENTITY, TransformTypes.IDENTITY }, + { HiveParser.TOK_YEAR, TransformTypes.YEAR }, { HiveParser.TOK_MONTH, TransformTypes.MONTH }, + { HiveParser.TOK_DAY, TransformTypes.DAY }, { HiveParser.TOK_HOUR, TransformTypes.HOUR }, + { HiveParser.TOK_TRUNCATE, TransformTypes.TRUNCATE }, { HiveParser.TOK_BUCKET, TransformTypes.BUCKET } }) + .collect(Collectors.toMap(e -> (Integer) e[0], e -> (TransformTypes) e[1])); + + /** + * Parse the partition transform specifications from the AST Tree node. + * @param node AST Tree node, must be not null + * @return list of partition transforms + */ + public static List<PartitionTransformSpec> getPartitionTransformSpec(ASTNode node) { + List<PartitionTransformSpec> partSpecList = new ArrayList<>(); + for (int i = 0; i < node.getChildCount(); i++) { + PartitionTransformSpec spec = new PartitionTransformSpec(); + ASTNode child = (ASTNode) node.getChild(i); + for (int j = 0; j < child.getChildCount(); j++) { + ASTNode grandChild = (ASTNode) child.getChild(j); + switch (grandChild.getToken().getType()) { + case HiveParser.TOK_IDENTITY: + case HiveParser.TOK_YEAR: + case HiveParser.TOK_MONTH: + case HiveParser.TOK_DAY: + case HiveParser.TOK_HOUR: + spec.transformType = TRANSFORMS.get(grandChild.getToken().getType()); + break; + case HiveParser.TOK_TRUNCATE: + case HiveParser.TOK_BUCKET: + spec.transformType = TRANSFORMS.get(grandChild.getToken().getType()); + spec.transformParam = Integer.valueOf(grandChild.getChild(0).getText()); + break; + default: + spec.name = grandChild.getText(); + } + } + partSpecList.add(spec); + } + + return partSpecList; + } + + public enum TransformTypes { + IDENTITY, YEAR, MONTH, DAY, HOUR, TRUNCATE, BUCKET + } + + public static class PartitionTransformSpec { + public String name; + public TransformTypes transformType; + public int transformParam; Review comment: In the case of TRUNCATE and BUCKET, the existence of the transform param is validated during the query parsing, but I agree It can be misleading for transform types with additional params. ########## File path: ql/src/java/org/apache/hadoop/hive/ql/parse/PartitionTransform.java ########## @@ -0,0 +1,79 @@ +/* + * 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.hadoop.hive.ql.parse; + +import java.util.ArrayList; +import java.util.List; +import java.util.Map; +import java.util.stream.Collectors; +import java.util.stream.Stream; + +public class PartitionTransform { + + private static final Map<Integer, TransformTypes> TRANSFORMS = Stream + .of(new Object[][] { { HiveParser.TOK_IDENTITY, TransformTypes.IDENTITY }, + { HiveParser.TOK_YEAR, TransformTypes.YEAR }, { HiveParser.TOK_MONTH, TransformTypes.MONTH }, + { HiveParser.TOK_DAY, TransformTypes.DAY }, { HiveParser.TOK_HOUR, TransformTypes.HOUR }, + { HiveParser.TOK_TRUNCATE, TransformTypes.TRUNCATE }, { HiveParser.TOK_BUCKET, TransformTypes.BUCKET } }) + .collect(Collectors.toMap(e -> (Integer) e[0], e -> (TransformTypes) e[1])); + + /** + * Parse the partition transform specifications from the AST Tree node. + * @param node AST Tree node, must be not null + * @return list of partition transforms + */ + public static List<PartitionTransformSpec> getPartitionTransformSpec(ASTNode node) { + List<PartitionTransformSpec> partSpecList = new ArrayList<>(); + for (int i = 0; i < node.getChildCount(); i++) { + PartitionTransformSpec spec = new PartitionTransformSpec(); + ASTNode child = (ASTNode) node.getChild(i); + for (int j = 0; j < child.getChildCount(); j++) { + ASTNode grandChild = (ASTNode) child.getChild(j); + switch (grandChild.getToken().getType()) { + case HiveParser.TOK_IDENTITY: Review comment: Done. -- This is an automated message from the Apache Git Service. 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