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new 990d30b99b [hive] Support multiset type in hive reads (#8949)
990d30b99b is described below
commit 990d30b99ba236700a8cb909f202284eccf2a1d7
Author: Arnav Balyan <[email protected]>
AuthorDate: Fri Jul 31 07:43:05 2026 +0530
[hive] Support multiset type in hive reads (#8949)
---
.../PaimonObjectInspectorFactory.java | 5 ++
.../PaimonObjectInspectorFactoryTest.java | 71 ++++++++++++++++++++++
2 files changed, 76 insertions(+)
diff --git
a/paimon-hive/paimon-hive-connector-common/src/main/java/org/apache/paimon/hive/objectinspector/PaimonObjectInspectorFactory.java
b/paimon-hive/paimon-hive-connector-common/src/main/java/org/apache/paimon/hive/objectinspector/PaimonObjectInspectorFactory.java
index 1b81722d00..09301cfd32 100644
---
a/paimon-hive/paimon-hive-connector-common/src/main/java/org/apache/paimon/hive/objectinspector/PaimonObjectInspectorFactory.java
+++
b/paimon-hive/paimon-hive-connector-common/src/main/java/org/apache/paimon/hive/objectinspector/PaimonObjectInspectorFactory.java
@@ -24,7 +24,9 @@ import org.apache.paimon.types.CharType;
import org.apache.paimon.types.DataField;
import org.apache.paimon.types.DataType;
import org.apache.paimon.types.DecimalType;
+import org.apache.paimon.types.IntType;
import org.apache.paimon.types.MapType;
+import org.apache.paimon.types.MultisetType;
import org.apache.paimon.types.RowType;
import org.apache.paimon.types.TimeType;
import org.apache.paimon.types.VarCharType;
@@ -89,6 +91,9 @@ public class PaimonObjectInspectorFactory {
case MAP:
MapType mapType = (MapType) logicalType;
return new PaimonMapObjectInspector(mapType.getKeyType(),
mapType.getValueType());
+ case MULTISET:
+ MultisetType multisetType = (MultisetType) logicalType;
+ return new
PaimonMapObjectInspector(multisetType.getElementType(), new IntType());
case ROW:
List<String> fieldComments =
((RowType) logicalType)
diff --git
a/paimon-hive/paimon-hive-connector-common/src/test/java/org/apache/paimon/hive/objectinspector/PaimonObjectInspectorFactoryTest.java
b/paimon-hive/paimon-hive-connector-common/src/test/java/org/apache/paimon/hive/objectinspector/PaimonObjectInspectorFactoryTest.java
new file mode 100644
index 0000000000..712382279e
--- /dev/null
+++
b/paimon-hive/paimon-hive-connector-common/src/test/java/org/apache/paimon/hive/objectinspector/PaimonObjectInspectorFactoryTest.java
@@ -0,0 +1,71 @@
+/*
+ * 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.paimon.hive.objectinspector;
+
+import org.apache.paimon.data.BinaryString;
+import org.apache.paimon.data.GenericMap;
+import org.apache.paimon.types.DataTypes;
+
+import org.apache.hadoop.hive.serde2.objectinspector.MapObjectInspector;
+import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
+import org.junit.jupiter.api.Test;
+
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.Map;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/** Tests for {@link PaimonObjectInspectorFactory}. */
+public class PaimonObjectInspectorFactoryTest {
+
+ @Test
+ public void testCreateMultisetObjectInspector() {
+ ObjectInspector oi =
+
PaimonObjectInspectorFactory.create(DataTypes.MULTISET(DataTypes.STRING()));
+
+ assertThat(oi.getCategory()).isEqualTo(ObjectInspector.Category.MAP);
+ assertThat(oi.getTypeName()).isEqualTo("map<string,int>");
+
+ MapObjectInspector mapOi = (MapObjectInspector) oi;
+ Map<BinaryString, Integer> javaMap = new HashMap<>();
+ javaMap.put(BinaryString.fromString("apple"), 2);
+ javaMap.put(BinaryString.fromString("banana"), 1);
+ GenericMap multisetData = new GenericMap(javaMap);
+
+ assertThat(mapOi.getMapSize(multisetData)).isEqualTo(2);
+ assertThat(mapOi.getMapValueElement(multisetData,
BinaryString.fromString("apple")))
+ .isEqualTo(2);
+ assertThat(mapOi.getMapValueElement(multisetData,
BinaryString.fromString("banana")))
+ .isEqualTo(1);
+ }
+
+ @Test
+ public void testCreateRowInspectorContainingMultiset() {
+ PaimonInternalRowObjectInspector inspector =
+ new PaimonInternalRowObjectInspector(
+ Arrays.asList("id", "tags"),
+ Arrays.asList(DataTypes.INT(),
DataTypes.MULTISET(DataTypes.STRING())),
+ Arrays.asList(null, null));
+
+ assertThat(inspector.getAllStructFieldRefs()).hasSize(2);
+
assertThat(inspector.getStructFieldRef("tags").getFieldObjectInspector().getTypeName())
+ .isEqualTo("map<string,int>");
+ }
+}
