yihua commented on code in PR #11265:
URL: https://github.com/apache/hudi/pull/11265#discussion_r1608735139


##########
hudi-common/src/main/java/org/apache/hudi/avro/AvroLogicalTypeEnum.java:
##########
@@ -0,0 +1,42 @@
+/*
+ * 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.avro;
+
+public enum AvroLogicalTypeEnum {

Review Comment:
   nit: Javadocs.  Does this work with all Avro spec versions?



##########
hudi-common/src/main/java/org/apache/hudi/avro/AvroLogicalTypeEnum.java:
##########
@@ -0,0 +1,42 @@
+/*
+ * 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.avro;
+
+public enum AvroLogicalTypeEnum {

Review Comment:
   Also, Avro library defines the `LogicalTypes`.  Can we use that instead of 
creating own enums?
   
https://github.com/apache/avro/blob/main/lang/java/avro/src/main/java/org/apache/avro/LogicalTypes.java



##########
hudi-common/src/main/java/org/apache/hudi/avro/MercifulJsonConverter.java:
##########
@@ -187,196 +178,774 @@ private static Object convertJsonToAvroField(Object 
value, String name, Schema s
       throw new HoodieJsonToAvroConversionException(null, name, schema, 
shouldSanitize, invalidCharMask);
     }
 
-    JsonToAvroFieldProcessor processor = 
FIELD_TYPE_PROCESSORS.get(schema.getType());
-    if (null != processor) {
+    return JsonToAvroFieldProcessorUtil.convertToAvro(value, name, schema, 
shouldSanitize, invalidCharMask);
+  }
+
+  private static class JsonToAvroFieldProcessorUtil {

Review Comment:
   Are you porting the logic from another library?  If so, could you reference 
the source?



##########
hudi-common/src/test/java/org/apache/hudi/avro/TestMercifulJsonConverter.java:
##########
@@ -55,6 +70,649 @@ public void basicConversion() throws IOException {
     Assertions.assertEquals(rec, CONVERTER.convert(json, simpleSchema));
   }
 
+  private static final String DECIMAL_AVRO_FILE_INVALID_PATH = 
"/decimal-logical-type-invalid.avsc";
+  private static final String DECIMAL_AVRO_FILE_PATH = 
"/decimal-logical-type.avsc";
+  private static final String DECIMAL_FIXED_AVRO_FILE_PATH = 
"/decimal-logical-type-fixed-type.avsc";
+  /**
+   * Covered case:
+   * Avro Logical Type: Decimal
+   * Exhaustive unsupported input coverage.
+   */
+  @ParameterizedTest
+  @MethodSource("decimalBadCases")
+  void decimalLogicalTypeInvalidCaseTest(String avroFile, String strInput, 
Double numInput,

Review Comment:
   Similar for the tests on code porting.  And do these cover all cases of 
logical types?



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