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https://issues.apache.org/jira/browse/HIVE-26754?focusedWorklogId=830033&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-830033
]
ASF GitHub Bot logged work on HIVE-26754:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 30/Nov/22 12:18
Start Date: 30/Nov/22 12:18
Worklog Time Spent: 10m
Work Description: tarak271 commented on code in PR #3806:
URL: https://github.com/apache/hive/pull/3806#discussion_r1035898966
##########
ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDFArrayDistinct.java:
##########
@@ -0,0 +1,59 @@
+/*
+ * 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.udf.generic;
+
+import org.apache.hadoop.hive.ql.exec.Description;
+import org.apache.hadoop.hive.ql.metadata.HiveException;
+import org.apache.hadoop.hive.serde2.objectinspector.ListObjectInspector;
+import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+/**
+ * Generic UDF for distinct array
+ * <code>ARRAY_DISTINCT(array(obj1, obj2, obj3...))</code>.
+ *
+ * @see org.apache.hadoop.hive.ql.udf.generic.GenericUDF
+ */
+@Description(name = "array_distinct",
+ value = "_FUNC_(array(obj1, obj2,...)) - "
+ + "The function returns an array of the same type as the input
argument where all duplicate"
+ + " values have been removed.",
+ extended = "Example:\n"
+ + " > SELECT _FUNC_(array('b', 'd', 'd', 'a')) FROM src LIMIT
1;\n"
+ + " ['b', 'd', 'a']")
+public class GenericUDFArrayDistinct extends AbstractGenericUDFArrayBase {
+
+ public GenericUDFArrayDistinct() {
+ super("ARRAY_DISTINCT", 1, 1, ObjectInspector.Category.LIST);
+ }
+
+ @Override
+ public Object evaluate(DeferredObject[] arguments) throws HiveException {
+
+ Object array = arguments[ARRAY_IDX].get();
+
+ if (arrayOI.getListLength(array) <= 0) {
+ return null;
+ }
+
+ List<?> retArray = ((ListObjectInspector)
argumentOIs[ARRAY_IDX]).getList(array);
+ return
convertArray(retArray.stream().distinct().collect(Collectors.toList()));
Review Comment:
Made changes as recommended
Issue Time Tracking
-------------------
Worklog Id: (was: 830033)
Time Spent: 2.5h (was: 2h 20m)
> Implement array_distinct UDF to return an array after removing duplicates in
> it
> -------------------------------------------------------------------------------
>
> Key: HIVE-26754
> URL: https://issues.apache.org/jira/browse/HIVE-26754
> Project: Hive
> Issue Type: Sub-task
> Components: Hive
> Reporter: Taraka Rama Rao Lethavadla
> Assignee: Taraka Rama Rao Lethavadla
> Priority: Major
> Labels: pull-request-available
> Time Spent: 2.5h
> Remaining Estimate: 0h
>
> *array_distinct(array(obj1, obj2,...))* - The function returns an array of
> the same type as the input argument where all duplicate values have been
> removed.
> Example:
> > SELECT array_distinct(array('b', 'd', 'd', 'a')) FROM src LIMIT 1;
> ['a', 'b', 'c']
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