Some generated protobuf descriptors do not quite match what protoc …

fdb-record-layer-core/src/main/java/com/apple/foundationdb/record/metadata/SyntheticRecordTypeBuilder.java

@@ -166,6 +166,7 @@ protected void addConstituentFields(@Nonnull DescriptorProtos.DescriptorProto.Bu
         for (Constituent constituent : constituents) {
             descriptorProto.addFieldBuilder()
                     .setName(constituent.getName())
+                    .setJsonName(constituent.getName())
                     .setNumber(++fieldNumber)
                     .setType(DescriptorProtos.FieldDescriptorProto.Type.TYPE_MESSAGE)
                     .setTypeName("." + constituent.getRecordType().getDescriptor().getFullName());

fdb-record-layer-core/src/main/java/com/apple/foundationdb/record/metadata/UnnestedRecordTypeBuilder.java

@@ -317,6 +317,7 @@ public void buildDescriptor(@Nonnull final DescriptorProtos.FileDescriptorProto.
                         .setLabel(DescriptorProtos.FieldDescriptorProto.Label.LABEL_OPTIONAL)
                         .setType(DescriptorProtos.FieldDescriptorProto.Type.TYPE_INT64)
                         .setName(constituent.getName())
+                        .setJsonName(constituent.getName())
                         .setNumber(indexPosition++);
             }
         }
@@ -325,6 +326,7 @@ public void buildDescriptor(@Nonnull final DescriptorProtos.FileDescriptorProto.
                 .setType(DescriptorProtos.FieldDescriptorProto.Type.TYPE_MESSAGE)
                 .setTypeName(name + "." + indexesProto.getName())
                 .setName(UnnestedRecordType.POSITIONS_FIELD)
+                .setJsonName(UnnestedRecordType.POSITIONS_FIELD)
                 .setNumber(getConstituents().size() + 1);
     }
 

fdb-record-layer-core/src/main/java/com/apple/foundationdb/record/provider/foundationdb/MetaDataProtoEditor.java

@@ -102,6 +102,7 @@ private static void addFieldToUnion(@Nonnull DescriptorProtos.DescriptorProto.Bu
                 .setType(DescriptorProtos.FieldDescriptorProto.Type.TYPE_MESSAGE)
                 .setTypeName(fullyQualifiedTypeName(fileBuilder, typeName))
                 .setName("_" + typeName)
+                .setJsonName("_" + typeName)
                 .setNumber(assignFieldNumber(unionBuilder));
         unionBuilder.addField(fieldBuilder);
     }
@@ -416,6 +417,7 @@ public static void renameRecordType(@Nonnull RecordMetaDataProto.MetaData.Builde
                             .noneMatch(otherUnionField -> otherUnionField != unionFieldBuilder
                                     && otherUnionField.getName().equals(newFieldName))) {
                         unionFieldBuilder.setName(newFieldName);
+                        unionFieldBuilder.setJsonName(newFieldName);
                     }
                 }
             }

fdb-record-layer-core/src/main/java/com/apple/foundationdb/record/query/plan/cascades/typing/Type.java

@@ -988,6 +988,7 @@ public void addProtoField(@Nonnull final TypeRepository.Builder typeRepositoryBu
             descriptorBuilder.addField(FieldDescriptorProto.newBuilder()
                     .setNumber(fieldNumber)
                     .setName(fieldName)
+                    .setJsonName(fieldName)
                     .setType(protoType)
                     .setLabel(label)
                     .build());
@@ -1634,6 +1635,7 @@ public void addProtoField(@Nonnull final TypeRepository.Builder typeRepositoryBu
             FieldDescriptorProto.Builder builder = FieldDescriptorProto.newBuilder()
                     .setNumber(fieldNumber)
                     .setName(fieldName)
+                    .setJsonName(fieldName)
                     .setType(protoType)
                     .setLabel(label);
             typeNameOptional.ifPresent(builder::setTypeName);
@@ -2067,9 +2069,11 @@ public void addProtoField(@Nonnull final TypeRepository.Builder typeRepositoryBu
             final var fieldDescriptorProto = FieldDescriptorProto.newBuilder();
             fieldDescriptorProto
                     .setName(fieldName)
+                    .setJsonName(fieldName)
                     .setNumber(fieldNumber)
+                    .setType(FieldDescriptorProto.Type.TYPE_MESSAGE)
                     .setLabel(label);
-            typeNameOptional.ifPresent(fieldDescriptorProto::setTypeName);
+            typeNameOptional.ifPresent(localName -> fieldDescriptorProto.setTypeName("." + localName));
             descriptorBuilder.addField(fieldDescriptorProto.build());
         }
 
@@ -3036,7 +3040,9 @@ public void addProtoField(@Nonnull final TypeRepository.Builder typeRepositoryBu
             FieldDescriptorProto.Builder builder = FieldDescriptorProto.newBuilder()
                     .setNumber(fieldNumber)
                     .setName(fieldName)
+                    .setJsonName(fieldName)
                     .setLabel(label)
+                    .setType(FieldDescriptorProto.Type.TYPE_MESSAGE)
                     .setTypeName(TupleFieldsProto.UUID.getDescriptor().getFullName());
             typeNameOptional.ifPresent(builder::setTypeName);
             descriptorBuilder.addField(builder);

fdb-relational-core/src/main/java/com/apple/foundationdb/relational/recordlayer/metadata/serde/FileDescriptorSerializer.java

@@ -101,11 +101,13 @@ public void visit(@Nonnull final Table table) {
         // add the table as an entry in the final 'RecordTypeUnion' entry of the record store metadata. There is one
         // field for each generation of the RecordLayerTable.
         for (var version : generations.entrySet()) {
+            final String name = recordLayerTable.getName() + "_" + (fieldCounter++);
             final var tableEntryInUnionDescriptor = DescriptorProtos.FieldDescriptorProto.newBuilder()
                     .setNumber(version.getKey())
-                    .setName(recordLayerTable.getName() + "_" + (fieldCounter++))
+                    .setName(name)
+                    .setJsonName(name)
                     .setType(DescriptorProtos.FieldDescriptorProto.Type.TYPE_MESSAGE)
-                    .setTypeName(typeDescriptor)
+                    .setTypeName("." + typeDescriptor)
                     .setOptions(version.getValue())
                     .build();
             unionDescriptorBuilder.addField(tableEntryInUnionDescriptor);

fdb-relational-core/src/test/java/com/apple/foundationdb/relational/api/ProtobufDataBuilderTest.java

@@ -120,7 +120,7 @@ public static DescriptorProtos.FieldDescriptorProto newDescriptor(String name,
                                                                       String messageType,
                                                                       boolean isRepeated) {
         DescriptorProtos.FieldDescriptorProto.Builder proto = DescriptorProtos.FieldDescriptorProto.newBuilder()
-                .setName(name);
+                .setName(name).setJsonName(name);
         switch (javaType) {
             case INT:
                 proto.setType(DescriptorProtos.FieldDescriptorProto.Type.TYPE_INT32);

fdb-relational-core/src/test/java/com/apple/foundationdb/relational/api/ddl/DdlTestUtil.java

@@ -251,7 +251,11 @@ private void buildTypesAndTables() {
                 if (extension != null && extension.hasUsage() && extension.getUsage() == RecordMetaDataOptionsProto.RecordTypeOptions.Usage.UNION) {
                     //we found the Union Descriptor
                     for (DescriptorProtos.FieldDescriptorProto tableDescs : typeDesc.getFieldList()) {
-                        tableNames.add(tableDescs.getTypeName());
+                        String name = tableDescs.getTypeName();
+                        if (name.startsWith(".")) {
+                            name = name.substring(1);
+                        }
+                        tableNames.add(name);
                     }
                 }
             }

fdb-relational-core/src/test/java/com/apple/foundationdb/relational/recordlayer/metadata/SchemaTemplateSerDeTests.java

@@ -163,7 +163,7 @@ public void testGoodSchemaTemplate() {
         final var unionDesc = maybeUnionDesc.get();
 
         // Check if all tables are part of union descriptor.
-        final var expectedTableNameSet = Set.of("T1", "T2");
+        final var expectedTableNameSet = Set.of(".T1", ".T2");
         Assertions.assertTrue(unionDesc.getFieldList().stream().allMatch(e -> expectedTableNameSet.contains(e.getTypeName())));
 
         // Check if the number of fields in union descriptor are equal to the tables in the template.
@@ -237,8 +237,10 @@ public void testGoodSchemaTemplateWithGenerations() {
         // Check if all generations are present in union descriptor
         for (final var unionField : unionDesc.getFieldList()) {
             final var typeName = unionField.getTypeName();
-            Assertions.assertTrue(testcase.containsKey(typeName));
-            final var expectedGenerations = testcase.get(typeName);
+            Assertions.assertTrue(typeName.startsWith("."));
+            final var caseName = typeName.substring(1);
+            Assertions.assertTrue(testcase.containsKey(caseName));
+            final var expectedGenerations = testcase.get(caseName);
             Assertions.assertTrue(expectedGenerations.contains(NonnullPair.of(unionField.getNumber(), unionField.getOptions())));
         }
     }