optimize multiple partial update code

hudi-client/hudi-client-common/src/main/java/org/apache/hudi/table/action/commit/BaseWriteHelper.java

@@ -43,7 +43,7 @@ public HoodieWriteMetadata<O> write(String instantTime,
     try {
       // De-dupe/merge if needed
       I dedupedRecords =
-          combineOnCondition(shouldCombine, inputRecords, shuffleParallelism, table, executor.config.getSchema());
+          combineOnCondition(shouldCombine, inputRecords, shuffleParallelism, table);
 
       Instant lookupBegin = Instant.now();
       I taggedRecords = dedupedRecords;
@@ -69,8 +69,8 @@ protected abstract I tag(
       I dedupedRecords, HoodieEngineContext context, HoodieTable<T, I, K, O> table);
 
   public I combineOnCondition(
-          boolean condition, I records, int parallelism, HoodieTable<T, I, K, O> table, String schemaString) {
-    return condition ? deduplicateRecords(records, table, parallelism, schemaString) : records;
+          boolean condition, I records, int parallelism, HoodieTable<T, I, K, O> table) {
+    return condition ? deduplicateRecords(records, table, parallelism) : records;
   }
 
   /**
@@ -81,8 +81,8 @@ public I combineOnCondition(
    * @return Collection of HoodieRecord already be deduplicated
    */
   public I deduplicateRecords(
-      I records, HoodieTable<T, I, K, O> table, int parallelism, String schemaString) {
-    return deduplicateRecords(records, table.getIndex(), parallelism, schemaString);
+      I records, HoodieTable<T, I, K, O> table, int parallelism) {
+    return deduplicateRecords(records, table.getIndex(), parallelism, table.getConfig().getSchema());
   }
 
   public abstract I deduplicateRecords(

hudi-client/hudi-client-common/src/main/java/org/apache/hudi/table/action/commit/HoodieWriteHelper.java

@@ -19,6 +19,7 @@
 package org.apache.hudi.table.action.commit;
 
 import org.apache.hudi.client.WriteStatus;
+import org.apache.hudi.common.config.SerializableSchema;
 import org.apache.hudi.common.data.HoodieData;
 import org.apache.hudi.common.engine.HoodieEngineContext;
 import org.apache.hudi.common.model.HoodieAvroRecord;
@@ -55,16 +56,15 @@ protected HoodieData<HoodieRecord<T>> tag(HoodieData<HoodieRecord<T>> dedupedRec
   public HoodieData<HoodieRecord<T>> deduplicateRecords(
       HoodieData<HoodieRecord<T>> records, HoodieIndex<?, ?> index, int parallelism, String schemaString) {
     boolean isIndexingGlobal = index.isGlobal();
-    Properties properties = new Properties();
-    properties.put("schema", schemaString);
+    final SerializableSchema schema = new SerializableSchema(schemaString);
     return records.mapToPair(record -> {
       HoodieKey hoodieKey = record.getKey();
       // If index used is global, then records are expected to differ in their partitionPath
       Object key = isIndexingGlobal ? hoodieKey.getRecordKey() : hoodieKey;
       return Pair.of(key, record);
     }).reduceByKey((rec1, rec2) -> {
       @SuppressWarnings("unchecked")
-      T reducedData = (T) rec2.getData().preCombine(rec1.getData(), properties);
+      T reducedData = (T) rec2.getData().preCombine(rec1.getData(), schema.get(), new  Properties());
       HoodieKey reducedKey = rec1.getData().equals(reducedData) ? rec1.getKey() : rec2.getKey();
 
       return new HoodieAvroRecord<>(reducedKey, reducedData);

hudi-client/hudi-flink-client/src/main/java/org/apache/hudi/table/action/commit/FlinkWriteHelper.java

@@ -18,6 +18,7 @@
 
 package org.apache.hudi.table.action.commit;
 
+import org.apache.avro.Schema;
 import org.apache.hudi.client.WriteStatus;
 import org.apache.hudi.common.data.HoodieListData;
 import org.apache.hudi.common.engine.HoodieEngineContext;
@@ -98,9 +99,8 @@ public List<HoodieRecord<T>> deduplicateRecords(
       final T data1 = rec1.getData();
       final T data2 = rec2.getData();
 
-      Properties properties = new Properties();
-      properties.put("schema", schemaString);
-      @SuppressWarnings("unchecked") final T reducedData = (T) data2.preCombine(data1, properties);
+      final Schema schema = new Schema.Parser().parse(schemaString);
+      @SuppressWarnings("unchecked") final T reducedData = (T) data2.preCombine(data1, schema, new Properties());
       // we cannot allow the user to change the key or partitionPath, since that will affect
       // everything
       // so pick it from one of the records.

hudi-client/hudi-java-client/src/main/java/org/apache/hudi/table/action/commit/JavaBulkInsertHelper.java

@@ -103,7 +103,7 @@ public List<WriteStatus> bulkInsert(List<HoodieRecord<T>> inputRecords,
 
     if (performDedupe) {
       dedupedRecords = (List<HoodieRecord<T>>) JavaWriteHelper.newInstance().combineOnCondition(config.shouldCombineBeforeInsert(), inputRecords,
-          parallelism, table, config.getSchema());
+          parallelism, table);
     }
 
     final List<HoodieRecord<T>> repartitionedRecords = (List<HoodieRecord<T>>) partitioner.repartitionRecords(dedupedRecords, parallelism);

hudi-client/hudi-spark-client/src/main/java/org/apache/hudi/table/action/commit/SparkBulkInsertHelper.java

@@ -100,7 +100,7 @@ public HoodieData<WriteStatus> bulkInsert(HoodieData<HoodieRecord<T>> inputRecor
 
     if (performDedupe) {
       dedupedRecords = (HoodieData<HoodieRecord<T>>) HoodieWriteHelper.newInstance().combineOnCondition(config.shouldCombineBeforeInsert(), inputRecords,
-          parallelism, table, config.getSchema());
+          parallelism, table);
     }
 
     // only JavaRDD is supported for Spark partitioner, but it is not enforced by BulkInsertPartitioner API. To improve this, TODO HUDI-3463

hudi-common/src/main/java/org/apache/hudi/avro/HoodieAvroUtils.java

@@ -18,18 +18,6 @@
 
 package org.apache.hudi.avro;
 
-import org.apache.hudi.common.config.SerializableSchema;
-import org.apache.hudi.common.model.HoodieOperation;
-import org.apache.hudi.common.model.HoodieRecord;
-import org.apache.hudi.common.model.HoodieRecordPayload;
-import org.apache.hudi.common.model.MultipleOrderingVal2ColsInfo;
-import org.apache.hudi.common.util.Option;
-import org.apache.hudi.common.util.StringUtils;
-import org.apache.hudi.common.util.collection.Pair;
-import org.apache.hudi.exception.HoodieException;
-import org.apache.hudi.exception.HoodieIOException;
-import org.apache.hudi.exception.SchemaCompatibilityException;
-
 import org.apache.avro.AvroRuntimeException;
 import org.apache.avro.Conversions;
 import org.apache.avro.Conversions.DecimalConversion;
@@ -54,6 +42,16 @@
 import org.apache.avro.io.JsonDecoder;
 import org.apache.avro.io.JsonEncoder;
 import org.apache.avro.specific.SpecificRecordBase;
+import org.apache.hudi.common.config.SerializableSchema;
+import org.apache.hudi.common.model.HoodieOperation;
+import org.apache.hudi.common.model.HoodieRecord;
+import org.apache.hudi.common.model.HoodieRecordPayload;
+import org.apache.hudi.common.util.Option;
+import org.apache.hudi.common.util.StringUtils;
+import org.apache.hudi.common.util.collection.Pair;
+import org.apache.hudi.exception.HoodieException;
+import org.apache.hudi.exception.HoodieIOException;
+import org.apache.hudi.exception.SchemaCompatibilityException;
 
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
@@ -70,13 +68,12 @@
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
+import java.util.Deque;
 import java.util.HashMap;
 import java.util.Iterator;
+import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
-import java.util.Deque;
-import java.util.LinkedList;
-import java.util.Objects;
 import java.util.TimeZone;
 import java.util.stream.Collectors;
 
@@ -497,17 +494,6 @@ public static Object getNestedFieldValAsString(GenericRecord record, String fiel
     return obj == null ? "" : StringUtils.objToString(obj);
   }
 
-  public static Object getMultipleNestedFieldVals(GenericRecord record, String fieldMappings, boolean consistentLogicalTimestampEnabled) {
-    MultipleOrderingVal2ColsInfo multipleOrderingVal2ColsInfo = new MultipleOrderingVal2ColsInfo(fieldMappings);
-    multipleOrderingVal2ColsInfo.getOrderingVal2ColsInfoList().forEach(orderingVal2ColsInfo -> {
-      Object val = getNestedFieldVal(record, orderingVal2ColsInfo.getOrderingField(), true, consistentLogicalTimestampEnabled);
-      if (Objects.nonNull(val)) {
-        orderingVal2ColsInfo.setOrderingValue(val.toString());
-      }
-    });
-    return multipleOrderingVal2ColsInfo.generateOrderingText();
-  }
-
   /**
    * Obtain value of the provided field, denoted by dot notation. e.g: a.b.c
    */

hudi-common/src/main/java/org/apache/hudi/common/config/SerializableSchema.java

@@ -38,6 +38,10 @@ public SerializableSchema() {
   public SerializableSchema(Schema schema) {
     this.schema = newCopy(schema);
   }
+
+  public SerializableSchema(String schemaStr) {
+    this.schema = new Schema.Parser().parse(schemaStr);
+  }
 
   public SerializableSchema(SerializableSchema serializableSchema) {
     this(serializableSchema.schema);

hudi-common/src/main/java/org/apache/hudi/common/model/HoodieRecordPayload.java

@@ -58,6 +58,20 @@ default T preCombine(T oldValue, Properties properties) {
     return preCombine(oldValue);
   }
 
+  /**
+   * When more than one HoodieRecord have the same HoodieKey in the incoming batch, this function combines them before attempting to insert/upsert by taking in a schema.
+   * Implementation can leverage the schema to decide their business logic to do preCombine.
+   *
+   * @param oldValue   instance of the old {@link HoodieRecordPayload} to be combined with.
+   * @param schema     Payload related schema. For example use schema to overwrite old instance for specified fields that doesn't equal to default value.
+   * @param properties Payload related properties. For example pass the ordering field(s) name to extract from value in storage.
+   * @return the combined value
+   */
+  @PublicAPIMethod(maturity = ApiMaturityLevel.EVOLVING)
+  default T preCombine(T oldValue, Schema schema, Properties properties) {
+    return preCombine(oldValue, properties);
+  }
+
   /**
    * This methods is deprecated. Please refer to {@link #combineAndGetUpdateValue(IndexedRecord, Schema, Properties)} for java docs.
    */