[HUDI-3978] Fix use of partition path field as hive partition field in flink (#5434)

* Fix partition path fields as hive sync partition fields error

hudi-flink-datasource/hudi-flink/src/main/java/org/apache/hudi/sink/utils/HiveSyncContext.java

@@ -18,6 +18,7 @@
 
 package org.apache.hudi.sink.utils;
 
+import org.apache.flink.annotation.VisibleForTesting;
 import org.apache.hudi.aws.sync.AwsGlueCatalogSyncTool;
 import org.apache.hudi.common.fs.FSUtils;
 import org.apache.hudi.configuration.FlinkOptions;
@@ -70,7 +71,8 @@ public class HiveSyncContext {
     return new HiveSyncContext(syncConfig, hiveConf, fs);
   }
 
-  private static HiveSyncConfig buildSyncConfig(Configuration conf) {
+  @VisibleForTesting
+  public static HiveSyncConfig buildSyncConfig(Configuration conf) {
     HiveSyncConfig hiveSyncConfig = new HiveSyncConfig();
     hiveSyncConfig.basePath = conf.getString(FlinkOptions.PATH);
     hiveSyncConfig.baseFileFormat = conf.getString(FlinkOptions.HIVE_SYNC_FILE_FORMAT);
@@ -83,7 +85,7 @@ public class HiveSyncContext {
     hiveSyncConfig.tableProperties = conf.getString(FlinkOptions.HIVE_SYNC_TABLE_PROPERTIES);
     hiveSyncConfig.serdeProperties = conf.getString(FlinkOptions.HIVE_SYNC_TABLE_SERDE_PROPERTIES);
     hiveSyncConfig.jdbcUrl = conf.getString(FlinkOptions.HIVE_SYNC_JDBC_URL);
-    hiveSyncConfig.partitionFields = Arrays.asList(FilePathUtils.extractPartitionKeys(conf));
+    hiveSyncConfig.partitionFields = Arrays.asList(FilePathUtils.extractHivePartitionFields(conf));
     hiveSyncConfig.partitionValueExtractorClass = conf.getString(FlinkOptions.HIVE_SYNC_PARTITION_EXTRACTOR_CLASS_NAME);
     hiveSyncConfig.useJdbc = conf.getBoolean(FlinkOptions.HIVE_SYNC_USE_JDBC);
     hiveSyncConfig.useFileListingFromMetadata = conf.getBoolean(FlinkOptions.METADATA_ENABLED);

hudi-flink-datasource/hudi-flink/src/main/java/org/apache/hudi/table/format/FilePathUtils.java

@@ -425,4 +425,17 @@ public class FilePathUtils {
     }
     return conf.getString(FlinkOptions.PARTITION_PATH_FIELD).split(",");
   }
+
+  /**
+   * Extracts the hive sync partition fields with given configuration.
+   *
+   * @param conf The flink configuration
+   * @return array of the hive partition fields
+   */
+  public static String[] extractHivePartitionFields(org.apache.flink.configuration.Configuration conf) {
+    if (FlinkOptions.isDefaultValueDefined(conf, FlinkOptions.HIVE_SYNC_PARTITION_FIELDS)) {
+      return extractPartitionKeys(conf);
+    }
+    return conf.getString(FlinkOptions.HIVE_SYNC_PARTITION_FIELDS).split(",");
+  }
 }

hudi-flink-datasource/hudi-flink/src/test/java/org/apache/hudi/sink/utils/TestHiveSyncContext.java

@@ -0,0 +1,62 @@
+/*
+ * 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.hudi.sink.utils;
+
+import org.apache.flink.configuration.Configuration;
+
+import org.apache.hudi.configuration.FlinkOptions;
+import org.apache.hudi.hive.HiveSyncConfig;
+
+import org.junit.jupiter.api.Test;
+
+import java.lang.reflect.Method;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/**
+ * Test cases for {@link HiveSyncContext}.
+ */
+public class TestHiveSyncContext {
+  /**
+   * Test that the file ids generated by the task can finally shuffled to itself.
+   */
+  @Test
+  public void testBuildSyncConfig() throws Exception {
+    Configuration configuration1 = new Configuration();
+    Configuration configuration2 = new Configuration();
+    String hiveSyncPartitionField = "hiveSyncPartitionField";
+    String partitionPathField = "partitionPathField";
+
+    configuration1.setString(FlinkOptions.HIVE_SYNC_PARTITION_FIELDS, hiveSyncPartitionField);
+    configuration1.setString(FlinkOptions.PARTITION_PATH_FIELD, partitionPathField);
+
+    configuration2.setString(FlinkOptions.PARTITION_PATH_FIELD, partitionPathField);
+
+    Class<?> threadClazz = Class.forName("org.apache.hudi.sink.utils.HiveSyncContext");
+    Method buildSyncConfigMethod = threadClazz.getDeclaredMethod("buildSyncConfig", Configuration.class);
+    buildSyncConfigMethod.setAccessible(true);
+
+    HiveSyncConfig hiveSyncConfig1 = HiveSyncContext.buildSyncConfig(configuration1);
+    HiveSyncConfig hiveSyncConfig2 = HiveSyncContext.buildSyncConfig(configuration2);
+
+    assertTrue(hiveSyncConfig1.partitionFields.get(0).equals(hiveSyncPartitionField));
+    assertTrue(hiveSyncConfig2.partitionFields.get(0).equals(partitionPathField));
+
+  }
+}