diff --git a/src/DataTypes/ObjectUtils.cpp b/src/DataTypes/ObjectUtils.cpp
index 4f3c22aa8a3..f8a1ff7002f 100644
--- a/src/DataTypes/ObjectUtils.cpp
+++ b/src/DataTypes/ObjectUtils.cpp
@@ -521,7 +521,7 @@ DataTypePtr createConcreteEmptyDynamicColumn(const DataTypePtr & type_in_storage
     throw Exception(ErrorCodes::EXPERIMENTAL_FEATURE_ERROR, "Type {} unexpectedly has dynamic columns", type_in_storage->getName());
 }
 
-bool hasDynamicSubcolumns(const ColumnsDescription & columns)
+bool hasDynamicSubcolumnsDeprecated(const ColumnsDescription & columns)
 {
     return std::any_of(columns.begin(), columns.end(),
         [](const auto & column)
diff --git a/src/DataTypes/ObjectUtils.h b/src/DataTypes/ObjectUtils.h
index d4109b971a4..830f0e4c95e 100644
--- a/src/DataTypes/ObjectUtils.h
+++ b/src/DataTypes/ObjectUtils.h
@@ -63,7 +63,7 @@ DataTypePtr createConcreteEmptyDynamicColumn(const DataTypePtr & type_in_storage
 void extendObjectColumns(NamesAndTypesList & columns_list, const ColumnsDescription & object_columns, bool with_subcolumns);
 
 /// Checks whether @columns contain any column with dynamic subcolumns.
-bool hasDynamicSubcolumns(const ColumnsDescription & columns);
+bool hasDynamicSubcolumnsDeprecated(const ColumnsDescription & columns);
 
 /// Updates types of objects in @object_columns inplace
 /// according to types in new_columns.
diff --git a/src/Formats/FormatSettings.h b/src/Formats/FormatSettings.h
index 315c2d1bc32..ed4357b6cfd 100644
--- a/src/Formats/FormatSettings.h
+++ b/src/Formats/FormatSettings.h
@@ -220,7 +220,7 @@ struct FormatSettings
         bool escape_forward_slashes = true;
         bool read_named_tuples_as_objects = false;
         bool use_string_type_for_ambiguous_paths_in_named_tuples_inference_from_objects = false;
-        bool write_named_tuples_as_objects = false;
+        bool write_named_tuples_as_objects = true;
         bool skip_null_value_in_named_tuples = false;
         bool defaults_for_missing_elements_in_named_tuple = false;
         bool ignore_unknown_keys_in_named_tuple = false;
diff --git a/src/Functions/FunctionsConversion.cpp b/src/Functions/FunctionsConversion.cpp
index ead4b6065ac..0aa6d12e714 100644
--- a/src/Functions/FunctionsConversion.cpp
+++ b/src/Functions/FunctionsConversion.cpp
@@ -4108,6 +4108,7 @@ private:
                 ColumnStringHelpers::WriteHelper write_helper(assert_cast<ColumnString &>(*json_string), input_rows_count);
                 auto & write_buffer = write_helper.getWriteBuffer();
                 FormatSettings format_settings = context ? getFormatSettings(context) : FormatSettings{};
+                format_settings.json.quote_64bit_integers = false;
                 auto serialization = arguments[0].type->getDefaultSerialization();
                 for (size_t i = 0; i < input_rows_count; ++i)
                 {
diff --git a/src/Interpreters/ClusterProxy/executeQuery.cpp b/src/Interpreters/ClusterProxy/executeQuery.cpp
index e88fdeb0379..dc1a8e5a1c3 100644
--- a/src/Interpreters/ClusterProxy/executeQuery.cpp
+++ b/src/Interpreters/ClusterProxy/executeQuery.cpp
@@ -755,7 +755,7 @@ void executeQueryWithParallelReplicasCustomKey(
     }
 
     ColumnsDescriptionByShardNum columns_object;
-    if (hasDynamicSubcolumns(columns))
+    if (hasDynamicSubcolumnsDeprecated(columns))
         columns_object = getExtendedObjectsOfRemoteTables(*query_info.cluster, storage_id, columns, context);
 
     ClusterProxy::SelectStreamFactory select_stream_factory
diff --git a/src/Interpreters/InterpreterCreateQuery.cpp b/src/Interpreters/InterpreterCreateQuery.cpp
index ff0e1d7f5a8..c9fcee498d2 100644
--- a/src/Interpreters/InterpreterCreateQuery.cpp
+++ b/src/Interpreters/InterpreterCreateQuery.cpp
@@ -1881,7 +1881,7 @@ bool InterpreterCreateQuery::doCreateTable(ASTCreateQuery & create,
 
     validateVirtualColumns(*res);
 
-    if (!res->supportsDynamicSubcolumnsDeprecated() && hasDynamicSubcolumns(res->getInMemoryMetadataPtr()->getColumns()) && mode <= LoadingStrictnessLevel::CREATE)
+    if (!res->supportsDynamicSubcolumnsDeprecated() && hasDynamicSubcolumnsDeprecated(res->getInMemoryMetadataPtr()->getColumns()) && mode <= LoadingStrictnessLevel::CREATE)
     {
         throw Exception(ErrorCodes::ILLEGAL_COLUMN,
             "Cannot create table with column of type Object, "
diff --git a/src/Storages/AlterCommands.cpp b/src/Storages/AlterCommands.cpp
index fbca222b1e7..9f41c845510 100644
--- a/src/Storages/AlterCommands.cpp
+++ b/src/Storages/AlterCommands.cpp
@@ -1450,9 +1450,8 @@ void AlterCommands::validate(const StoragePtr & table, ContextPtr context) const
                 const auto old_data_type = all_columns.getColumn(options, column_name).type;
 
                 bool new_type_has_deprecated_object = command.data_type->hasDynamicSubcolumnsDeprecated();
-                bool old_type_has_deprecated_object = old_data_type->hasDynamicSubcolumnsDeprecated();
 
-                if (new_type_has_deprecated_object || old_type_has_deprecated_object)
+                if (new_type_has_deprecated_object)
                     throw Exception(
                         ErrorCodes::BAD_ARGUMENTS,
                         "The change of data type {} of column {} to {} is not allowed. It has known bugs",
diff --git a/src/Storages/MergeTree/MergeTreeData.cpp b/src/Storages/MergeTree/MergeTreeData.cpp
index b9e674a8eec..286c1581fa9 100644
--- a/src/Storages/MergeTree/MergeTreeData.cpp
+++ b/src/Storages/MergeTree/MergeTreeData.cpp
@@ -4104,7 +4104,7 @@ void MergeTreeData::checkPartDynamicColumns(MutableDataPartPtr & part, DataParts
     const auto & columns = metadata_snapshot->getColumns();
     auto virtuals = getVirtualsPtr();
 
-    if (!hasDynamicSubcolumns(columns))
+    if (!hasDynamicSubcolumnsDeprecated(columns))
         return;
 
     const auto & part_columns = part->getColumns();
@@ -8754,8 +8754,11 @@ void MergeTreeData::resetObjectColumnsFromActiveParts(const DataPartsLock & /*lo
 {
     auto metadata_snapshot = getInMemoryMetadataPtr();
     const auto & columns = metadata_snapshot->getColumns();
-    if (!hasDynamicSubcolumns(columns))
+    if (!hasDynamicSubcolumnsDeprecated(columns))
+    {
+        object_columns = ColumnsDescription{};
         return;
+    }
 
     auto range = getDataPartsStateRange(DataPartState::Active);
     object_columns = getConcreteObjectColumns(range, columns);
@@ -8765,7 +8768,7 @@ void MergeTreeData::updateObjectColumns(const DataPartPtr & part, const DataPart
 {
     auto metadata_snapshot = getInMemoryMetadataPtr();
     const auto & columns = metadata_snapshot->getColumns();
-    if (!hasDynamicSubcolumns(columns))
+    if (!hasDynamicSubcolumnsDeprecated(columns))
         return;
 
     DB::updateObjectColumns(object_columns, columns, part->getColumns());
diff --git a/src/Storages/MergeTree/StorageFromMergeTreeDataPart.cpp b/src/Storages/MergeTree/StorageFromMergeTreeDataPart.cpp
index 3df03b55cd4..9e59c086e79 100644
--- a/src/Storages/MergeTree/StorageFromMergeTreeDataPart.cpp
+++ b/src/Storages/MergeTree/StorageFromMergeTreeDataPart.cpp
@@ -50,7 +50,7 @@ StorageSnapshotPtr
 StorageFromMergeTreeDataPart::getStorageSnapshot(const StorageMetadataPtr & metadata_snapshot, ContextPtr /*query_context*/) const
 {
     const auto & storage_columns = metadata_snapshot->getColumns();
-    if (!hasDynamicSubcolumns(storage_columns))
+    if (!hasDynamicSubcolumnsDeprecated(storage_columns))
         return std::make_shared<StorageSnapshot>(*this, metadata_snapshot);
 
     auto data_parts = storage.getDataPartsVectorForInternalUsage();
diff --git a/src/Storages/StorageDistributed.cpp b/src/Storages/StorageDistributed.cpp
index 4f5a95ab508..337800338d1 100644
--- a/src/Storages/StorageDistributed.cpp
+++ b/src/Storages/StorageDistributed.cpp
@@ -686,7 +686,7 @@ std::optional<QueryProcessingStage::Enum> StorageDistributed::getOptimizedQueryP
 
 static bool requiresObjectColumns(const ColumnsDescription & all_columns, ASTPtr query)
 {
-    if (!hasDynamicSubcolumns(all_columns))
+    if (!hasDynamicSubcolumnsDeprecated(all_columns))
         return false;
 
     if (!query)
diff --git a/src/Storages/StorageMemory.cpp b/src/Storages/StorageMemory.cpp
index 71447889d86..e352b16546e 100644
--- a/src/Storages/StorageMemory.cpp
+++ b/src/Storages/StorageMemory.cpp
@@ -180,7 +180,7 @@ StorageSnapshotPtr StorageMemory::getStorageSnapshot(const StorageMetadataPtr &
     /// rows and bytes counters into the MultiVersion-ed struct, then everything would be consistent.
     snapshot_data->rows_approx = total_size_rows.load(std::memory_order_relaxed);
 
-    if (!hasDynamicSubcolumns(metadata_snapshot->getColumns()))
+    if (!hasDynamicSubcolumnsDeprecated(metadata_snapshot->getColumns()))
         return std::make_shared<StorageSnapshot>(*this, metadata_snapshot, ColumnsDescription{}, std::move(snapshot_data));
 
     auto object_columns = getConcreteObjectColumns(
diff --git a/tests/queries/0_stateless/02725_object_column_alter.sql b/tests/queries/0_stateless/02725_object_column_alter.sql
index 0e41070742a..9625e7c9777 100644
--- a/tests/queries/0_stateless/02725_object_column_alter.sql
+++ b/tests/queries/0_stateless/02725_object_column_alter.sql
@@ -3,13 +3,7 @@
 SET allow_experimental_object_type=1;
 
 DROP TABLE IF EXISTS t_to;
-DROP TABLE IF EXISTS t_from;
-
 CREATE TABLE t_to (id UInt64, value Nullable(String)) ENGINE MergeTree() ORDER BY id;
-CREATE TABLE t_from (id UInt64, value Object('json')) ENGINE MergeTree() ORDER BY id;
-
 ALTER TABLE t_to MODIFY COLUMN value Object('json'); -- { serverError BAD_ARGUMENTS }
-ALTER TABLE t_from MODIFY COLUMN value Nullable(String); -- { serverError BAD_ARGUMENTS }
-
 DROP TABLE t_to;
-DROP TABLE t_from;
+
diff --git a/tests/queries/0_stateless/03261_tuple_map_object_to_json_cast.reference b/tests/queries/0_stateless/03261_tuple_map_object_to_json_cast.reference
index 0ae94e68663..bfc10723941 100644
--- a/tests/queries/0_stateless/03261_tuple_map_object_to_json_cast.reference
+++ b/tests/queries/0_stateless/03261_tuple_map_object_to_json_cast.reference
@@ -1,20 +1,20 @@
 Map to JSON
 {"a":"0","b":"1970-01-01","c":[],"d":[{"e":"0"}]}	{'a':'Int64','b':'Date','c':'Array(Nullable(String))','d':'Array(JSON(max_dynamic_types=16, max_dynamic_paths=256))'}
-{"a":"1","b":"1970-01-02","c":["0"],"d":[{"e":"1"}]}	{'a':'Int64','b':'Date','c':'Array(Nullable(String))','d':'Array(JSON(max_dynamic_types=16, max_dynamic_paths=256))'}
-{"a":"2","b":"1970-01-03","c":["0","1"],"d":[{"e":"2"}]}	{'a':'Int64','b':'Date','c':'Array(Nullable(String))','d':'Array(JSON(max_dynamic_types=16, max_dynamic_paths=256))'}
-{"a":"3","b":"1970-01-04","c":["0","1","2"],"d":[{"e":"3"}]}	{'a':'Int64','b':'Date','c':'Array(Nullable(String))','d':'Array(JSON(max_dynamic_types=16, max_dynamic_paths=256))'}
-{"a":"4","b":"1970-01-05","c":["0","1","2","3"],"d":[{"e":"4"}]}	{'a':'Int64','b':'Date','c':'Array(Nullable(String))','d':'Array(JSON(max_dynamic_types=16, max_dynamic_paths=256))'}
+{"a":"1","b":"1970-01-02","c":["0"],"d":[{"e":"1"}]}	{'a':'Int64','b':'Date','c':'Array(Nullable(Int64))','d':'Array(JSON(max_dynamic_types=16, max_dynamic_paths=256))'}
+{"a":"2","b":"1970-01-03","c":["0","1"],"d":[{"e":"2"}]}	{'a':'Int64','b':'Date','c':'Array(Nullable(Int64))','d':'Array(JSON(max_dynamic_types=16, max_dynamic_paths=256))'}
+{"a":"3","b":"1970-01-04","c":["0","1","2"],"d":[{"e":"3"}]}	{'a':'Int64','b':'Date','c':'Array(Nullable(Int64))','d':'Array(JSON(max_dynamic_types=16, max_dynamic_paths=256))'}
+{"a":"4","b":"1970-01-05","c":["0","1","2","3"],"d":[{"e":"4"}]}	{'a':'Int64','b':'Date','c':'Array(Nullable(Int64))','d':'Array(JSON(max_dynamic_types=16, max_dynamic_paths=256))'}
 {"a0":"0","b0":"1970-01-01","c0":[],"d0":[{"e0":"0"}]}	{'a0':'Int64','b0':'Date','c0':'Array(Nullable(String))','d0':'Array(JSON(max_dynamic_types=16, max_dynamic_paths=256))'}
-{"a1":"1","b1":"1970-01-02","c1":["0"],"d1":[{"e1":"1"}]}	{'a1':'Int64','b1':'Date','c1':'Array(Nullable(String))','d1':'Array(JSON(max_dynamic_types=16, max_dynamic_paths=256))'}
-{"a2":"2","b2":"1970-01-03","c2":["0","1"],"d2":[{"e2":"2"}]}	{'a2':'Int64','b2':'Date','c2':'Array(Nullable(String))','d2':'Array(JSON(max_dynamic_types=16, max_dynamic_paths=256))'}
-{"a0":"3","b0":"1970-01-04","c0":["0","1","2"],"d0":[{"e0":"3"}]}	{'a0':'Int64','b0':'Date','c0':'Array(Nullable(String))','d0':'Array(JSON(max_dynamic_types=16, max_dynamic_paths=256))'}
-{"a1":"4","b1":"1970-01-05","c1":["0","1","2","3"],"d1":[{"e1":"4"}]}	{'a1':'Int64','b1':'Date','c1':'Array(Nullable(String))','d1':'Array(JSON(max_dynamic_types=16, max_dynamic_paths=256))'}
+{"a1":"1","b1":"1970-01-02","c1":["0"],"d1":[{"e1":"1"}]}	{'a1':'Int64','b1':'Date','c1':'Array(Nullable(Int64))','d1':'Array(JSON(max_dynamic_types=16, max_dynamic_paths=256))'}
+{"a2":"2","b2":"1970-01-03","c2":["0","1"],"d2":[{"e2":"2"}]}	{'a2':'Int64','b2':'Date','c2':'Array(Nullable(Int64))','d2':'Array(JSON(max_dynamic_types=16, max_dynamic_paths=256))'}
+{"a0":"3","b0":"1970-01-04","c0":["0","1","2"],"d0":[{"e0":"3"}]}	{'a0':'Int64','b0':'Date','c0':'Array(Nullable(Int64))','d0':'Array(JSON(max_dynamic_types=16, max_dynamic_paths=256))'}
+{"a1":"4","b1":"1970-01-05","c1":["0","1","2","3"],"d1":[{"e1":"4"}]}	{'a1':'Int64','b1':'Date','c1':'Array(Nullable(Int64))','d1':'Array(JSON(max_dynamic_types=16, max_dynamic_paths=256))'}
 Tuple to JSON
 {"a":"0","b":"1970-01-01","c":[],"d":[{"e":"0"}]}	{'a':'Int64','b':'Date','c':'Array(Nullable(String))','d':'Array(JSON(max_dynamic_types=16, max_dynamic_paths=256))'}
-{"a":"1","b":"1970-01-02","c":["0"],"d":[{"e":"1"}]}	{'a':'Int64','b':'Date','c':'Array(Nullable(String))','d':'Array(JSON(max_dynamic_types=16, max_dynamic_paths=256))'}
-{"a":"2","b":"1970-01-03","c":["0","1"],"d":[{"e":"2"}]}	{'a':'Int64','b':'Date','c':'Array(Nullable(String))','d':'Array(JSON(max_dynamic_types=16, max_dynamic_paths=256))'}
-{"a":"3","b":"1970-01-04","c":["0","1","2"],"d":[{"e":"3"}]}	{'a':'Int64','b':'Date','c':'Array(Nullable(String))','d':'Array(JSON(max_dynamic_types=16, max_dynamic_paths=256))'}
-{"a":"4","b":"1970-01-05","c":["0","1","2","3"],"d":[{"e":"4"}]}	{'a':'Int64','b':'Date','c':'Array(Nullable(String))','d':'Array(JSON(max_dynamic_types=16, max_dynamic_paths=256))'}
+{"a":"1","b":"1970-01-02","c":["0"],"d":[{"e":"1"}]}	{'a':'Int64','b':'Date','c':'Array(Nullable(Int64))','d':'Array(JSON(max_dynamic_types=16, max_dynamic_paths=256))'}
+{"a":"2","b":"1970-01-03","c":["0","1"],"d":[{"e":"2"}]}	{'a':'Int64','b':'Date','c':'Array(Nullable(Int64))','d':'Array(JSON(max_dynamic_types=16, max_dynamic_paths=256))'}
+{"a":"3","b":"1970-01-04","c":["0","1","2"],"d":[{"e":"3"}]}	{'a':'Int64','b':'Date','c':'Array(Nullable(Int64))','d':'Array(JSON(max_dynamic_types=16, max_dynamic_paths=256))'}
+{"a":"4","b":"1970-01-05","c":["0","1","2","3"],"d":[{"e":"4"}]}	{'a':'Int64','b':'Date','c':'Array(Nullable(Int64))','d':'Array(JSON(max_dynamic_types=16, max_dynamic_paths=256))'}
 Object to JSON
 {"a":"0","b":"1970-01-01","c":[],"d":{"e":["0"]}}	{'a':'Int64','b':'Date','c':'Array(Nullable(String))','d.e':'Array(Nullable(Int64))'}
 {"a":"1","b":"1970-01-02","c":["0"],"d":{"e":["1"]}}	{'a':'Int64','b':'Date','c':'Array(Nullable(String))','d.e':'Array(Nullable(Int64))'}
diff --git a/tests/queries/0_stateless/03270_object_to_json_alter.reference b/tests/queries/0_stateless/03270_object_to_json_alter.reference
new file mode 100644
index 00000000000..a04884fb374
--- /dev/null
+++ b/tests/queries/0_stateless/03270_object_to_json_alter.reference
@@ -0,0 +1,132 @@
+{'a0':['Int64'],'a1':['Int64'],'a10':['Int64'],'a11':['Int64'],'a12':['Int64'],'a13':['Int64'],'a14':['Int64'],'a15':['Int64'],'a16':['Int64'],'a17':['Int64'],'a18':['Int64'],'a19':['Int64'],'a2':['Int64'],'a20':['Int64'],'a21':['Int64'],'a22':['Int64'],'a23':['Int64'],'a24':['Int64'],'a25':['Int64'],'a26':['Int64'],'a27':['Int64'],'a28':['Int64'],'a29':['Int64'],'a3':['Int64'],'a30':['Int64'],'a31':['Int64'],'a32':['Int64'],'a33':['Int64'],'a34':['Int64'],'a35':['Int64'],'a36':['Int64'],'a37':['Int64'],'a38':['Int64'],'a39':['Int64'],'a4':['Int64'],'a40':['Int64'],'a41':['Int64'],'a42':['Int64'],'a43':['Int64'],'a44':['Int64'],'a45':['Int64'],'a46':['Int64'],'a47':['Int64'],'a48':['Int64'],'a49':['Int64'],'a5':['Int64'],'a50':['Int64'],'a51':['Int64'],'a52':['Int64'],'a53':['Int64'],'a54':['Int64'],'a55':['Int64'],'a56':['Int64'],'a57':['Int64'],'a58':['Int64'],'a59':['Int64'],'a6':['Int64'],'a60':['Int64'],'a61':['Int64'],'a62':['Int64'],'a63':['Int64'],'a64':['Int64'],'a65':['Int64'],'a66':['Int64'],'a67':['Int64'],'a68':['Int64'],'a69':['Int64'],'a7':['Int64'],'a70':['Int64'],'a71':['Int64'],'a72':['Int64'],'a73':['Int64'],'a74':['Int64'],'a75':['Int64'],'a76':['Int64'],'a77':['Int64'],'a78':['Int64'],'a79':['Int64'],'a8':['Int64'],'a80':['Int64'],'a81':['Int64'],'a82':['Int64'],'a83':['Int64'],'a84':['Int64'],'a85':['Int64'],'a86':['Int64'],'a87':['Int64'],'a88':['Int64'],'a89':['Int64'],'a9':['Int64'],'a90':['Int64'],'a91':['Int64'],'a92':['Int64'],'a93':['Int64'],'a94':['Int64'],'a95':['Int64'],'a96':['Int64'],'a97':['Int64'],'a98':['Int64'],'a99':['Int64']}
+0
+100
+200
+300
+400
+500
+600
+700
+800
+900
+0
+99
+199
+299
+399
+499
+599
+699
+799
+899
+999
+{'a0':['Int64'],'a1':['Int64'],'a10':['Int64'],'a11':['Int64'],'a12':['Int64'],'a13':['Int64'],'a14':['Int64'],'a15':['Int64'],'a16':['Int64'],'a17':['Int64'],'a18':['Int64'],'a19':['Int64'],'a2':['Int64'],'a20':['Int64'],'a21':['Int64'],'a22':['Int64'],'a23':['Int64'],'a24':['Int64'],'a25':['Int64'],'a26':['Int64'],'a27':['Int64'],'a28':['Int64'],'a29':['Int64'],'a3':['Int64'],'a30':['Int64'],'a31':['Int64'],'a32':['Int64'],'a33':['Int64'],'a34':['Int64'],'a35':['Int64'],'a36':['Int64'],'a37':['Int64'],'a38':['Int64'],'a39':['Int64'],'a4':['Int64'],'a40':['Int64'],'a41':['Int64'],'a42':['Int64'],'a43':['Int64'],'a44':['Int64'],'a45':['Int64'],'a46':['Int64'],'a47':['Int64'],'a48':['Int64'],'a49':['Int64'],'a5':['Int64'],'a50':['Int64'],'a51':['Int64'],'a52':['Int64'],'a53':['Int64'],'a54':['Int64'],'a55':['Int64'],'a56':['Int64'],'a57':['Int64'],'a58':['Int64'],'a59':['Int64'],'a6':['Int64'],'a60':['Int64'],'a61':['Int64'],'a62':['Int64'],'a63':['Int64'],'a64':['Int64'],'a65':['Int64'],'a66':['Int64'],'a67':['Int64'],'a68':['Int64'],'a69':['Int64'],'a7':['Int64'],'a70':['Int64'],'a71':['Int64'],'a72':['Int64'],'a73':['Int64'],'a74':['Int64'],'a75':['Int64'],'a76':['Int64'],'a77':['Int64'],'a78':['Int64'],'a79':['Int64'],'a8':['Int64'],'a80':['Int64'],'a81':['Int64'],'a82':['Int64'],'a83':['Int64'],'a84':['Int64'],'a85':['Int64'],'a86':['Int64'],'a87':['Int64'],'a88':['Int64'],'a89':['Int64'],'a9':['Int64'],'a90':['Int64'],'a91':['Int64'],'a92':['Int64'],'a93':['Int64'],'a94':['Int64'],'a95':['Int64'],'a96':['Int64'],'a97':['Int64'],'a98':['Int64'],'a99':['Int64']}
+0
+100
+200
+300
+400
+500
+600
+700
+800
+900
+0
+99
+199
+299
+399
+499
+599
+699
+799
+899
+999
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+0
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diff --git a/tests/queries/0_stateless/03270_object_to_json_alter.sql b/tests/queries/0_stateless/03270_object_to_json_alter.sql
new file mode 100644
index 00000000000..61db4d0d33a
--- /dev/null
+++ b/tests/queries/0_stateless/03270_object_to_json_alter.sql
@@ -0,0 +1,56 @@
+set allow_experimental_object_type = 1;
+set allow_experimental_json_type = 1;
+set max_block_size = 100;
+set max_insert_block_size = 100;
+set min_insert_block_size_rows = 100;
+set output_format_json_quote_64bit_integers = 0;
+
+drop table if exists test;
+
+create table test (json Object('json')) engine=Memory;
+insert into test select toJSONString(map('a' || number % 100, number)) from numbers(1000);
+alter table test modify column json JSON;
+select distinctJSONPathsAndTypes(json) from test;
+select distinct json.a0 from test order by json.a0.:Int64;
+select distinct json.a99 from test order by json.a99.:Int64;
+drop table test;
+
+create table test (json Object('json')) engine=Memory;
+insert into test select toJSONString(map('a' || number % 100, number)) from numbers(1000);
+alter table test modify column json JSON(max_dynamic_paths=10);
+select distinctJSONPathsAndTypes(json) from test;
+select distinct json.a0 from test order by json.a0.:Int64;
+select distinct json.a99 from test order by json.a99.:Int64;
+drop table test;
+
+create table test (json Object('json')) engine=MergeTree order by tuple() settings min_rows_for_wide_part=10000000, min_bytes_for_wide_part=100000000;
+insert into test select toJSONString(map('a' || number % 100, number)) from numbers(1000);
+alter table test modify column json JSON;
+select distinctJSONPathsAndTypes(json) from test;
+select distinct json.a0 from test order by json.a0.:Int64;
+select distinct json.a99 from test order by json.a99.:Int64;
+drop table test;
+
+create table test (json Object('json')) engine=MergeTree order by tuple() settings min_rows_for_wide_part=10000000, min_bytes_for_wide_part=100000000;
+insert into test select toJSONString(map('a' || number % 100, number)) from numbers(1000);
+alter table test modify column json JSON(max_dynamic_paths=10);
+select distinctJSONPathsAndTypes(json) from test;
+select distinct json.a0 from test order by json.a0.:Int64;
+select distinct json.a99 from test order by json.a99.:Int64;
+drop table test;
+
+create table test (json Object('json')) engine=MergeTree order by tuple() settings min_rows_for_wide_part=1, min_bytes_for_wide_part=1;
+insert into test select toJSONString(map('a' || number % 100, number)) from numbers(1000);
+alter table test modify column json JSON();
+select distinctJSONPathsAndTypes(json) from test;
+select distinct json.a0 from test order by json.a0.:Int64;
+select distinct json.a99 from test order by json.a99.:Int64;
+drop table test;
+
+create table test (json Object('json')) engine=MergeTree order by tuple() settings min_rows_for_wide_part=1, min_bytes_for_wide_part=1;
+insert into test select toJSONString(map('a' || number % 100, number)) from numbers(1000);
+alter table test modify column json JSON(max_dynamic_paths=10);
+select distinctJSONPathsAndTypes(json) from test;
+select distinct json.a0 from test order by json.a0.:Int64;
+select distinct json.a99 from test order by json.a99.:Int64;
+drop table test;
diff --git a/tests/queries/0_stateless/03271_ghdata_object_to_json_alter.reference b/tests/queries/0_stateless/03271_ghdata_object_to_json_alter.reference
new file mode 100644
index 00000000000..ca2fb7e8ff9
--- /dev/null
+++ b/tests/queries/0_stateless/03271_ghdata_object_to_json_alter.reference
@@ -0,0 +1,12 @@
+5000
+leonardomso/33-js-concepts	3
+ytdl-org/youtube-dl	3
+Bogdanp/neko	2
+bminossi/AllVideoPocsFromHackerOne	2
+disclose/diodata	2
+Commit	182
+chipeo345	119
+phanwi346	114
+Nicholas Piggin	95
+direwolf-github	49
+2
diff --git a/tests/queries/0_stateless/03271_ghdata_object_to_json_alter.sh b/tests/queries/0_stateless/03271_ghdata_object_to_json_alter.sh
new file mode 100755
index 00000000000..fc217780aa3
--- /dev/null
+++ b/tests/queries/0_stateless/03271_ghdata_object_to_json_alter.sh
@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+# Tags: no-fasttest, long
+
+CUR_DIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
+# shellcheck source=../shell_config.sh
+. "$CUR_DIR"/../shell_config.sh
+
+${CLICKHOUSE_CLIENT} -q "DROP TABLE IF EXISTS ghdata"
+${CLICKHOUSE_CLIENT} -q "CREATE TABLE ghdata (data Object('json')) ENGINE = MergeTree ORDER BY tuple() SETTINGS index_granularity = 8192, index_granularity_bytes = '10Mi'" --allow_experimental_object_type
+
+cat $CUR_DIR/data_json/ghdata_sample.json | ${CLICKHOUSE_CLIENT} \
+  --max_memory_usage 10G --query "INSERT INTO ghdata FORMAT JSONAsObject"
+
+${CLICKHOUSE_CLIENT} -q "ALTER TABLE ghdata MODIFY column data JSON SETTINGS mutations_sync=1" --allow_experimental_json_type 1
+
+${CLICKHOUSE_CLIENT} -q "SELECT count() FROM ghdata WHERE NOT ignore(*)"
+
+${CLICKHOUSE_CLIENT} -q \
+"SELECT data.repo.name, count() AS stars FROM ghdata \
+    WHERE data.type = 'WatchEvent' GROUP BY data.repo.name ORDER BY stars DESC, data.repo.name LIMIT 5" --allow_suspicious_types_in_group_by=1 --allow_suspicious_types_in_order_by=1
+
+${CLICKHOUSE_CLIENT} --enable_analyzer=1 -q \
+"SELECT data.payload.commits[].author.name AS name, count() AS c FROM ghdata \
+    ARRAY JOIN data.payload.commits[].author.name \
+    GROUP BY name ORDER BY c DESC, name LIMIT 5" --allow_suspicious_types_in_group_by=1 --allow_suspicious_types_in_order_by=1
+
+${CLICKHOUSE_CLIENT} -q "SELECT max(data.payload.pull_request.assignees[].size0) FROM ghdata"
+
+${CLICKHOUSE_CLIENT} -q "DROP TABLE IF EXISTS ghdata"
diff --git a/tests/queries/0_stateless/03272_ghdata_object_to_json_alter_shared_data.reference b/tests/queries/0_stateless/03272_ghdata_object_to_json_alter_shared_data.reference
new file mode 100644
index 00000000000..ca2fb7e8ff9
--- /dev/null
+++ b/tests/queries/0_stateless/03272_ghdata_object_to_json_alter_shared_data.reference
@@ -0,0 +1,12 @@
+5000
+leonardomso/33-js-concepts	3
+ytdl-org/youtube-dl	3
+Bogdanp/neko	2
+bminossi/AllVideoPocsFromHackerOne	2
+disclose/diodata	2
+Commit	182
+chipeo345	119
+phanwi346	114
+Nicholas Piggin	95
+direwolf-github	49
+2
diff --git a/tests/queries/0_stateless/03272_ghdata_object_to_json_alter_shared_data.sh b/tests/queries/0_stateless/03272_ghdata_object_to_json_alter_shared_data.sh
new file mode 100755
index 00000000000..fad2833b74e
--- /dev/null
+++ b/tests/queries/0_stateless/03272_ghdata_object_to_json_alter_shared_data.sh
@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+# Tags: no-fasttest, no-msan, no-tsan, no-asan, long
+
+CUR_DIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
+# shellcheck source=../shell_config.sh
+. "$CUR_DIR"/../shell_config.sh
+
+${CLICKHOUSE_CLIENT} -q "DROP TABLE IF EXISTS ghdata"
+${CLICKHOUSE_CLIENT} -q "CREATE TABLE ghdata (data Object('json')) ENGINE = MergeTree ORDER BY tuple() SETTINGS index_granularity = 8192, index_granularity_bytes = '10Mi'" --allow_experimental_object_type=1
+
+cat $CUR_DIR/data_json/ghdata_sample.json | ${CLICKHOUSE_CLIENT} \
+  --max_memory_usage 10G --query "INSERT INTO ghdata FORMAT JSONAsObject"
+
+${CLICKHOUSE_CLIENT} -q "ALTER TABLE ghdata MODIFY column data JSON(max_dynamic_paths=8) SETTINGS mutations_sync=1" --allow_experimental_json_type 1
+
+${CLICKHOUSE_CLIENT} -q "SELECT count() FROM ghdata WHERE NOT ignore(*)"
+
+${CLICKHOUSE_CLIENT} -q \
+"SELECT data.repo.name, count() AS stars FROM ghdata \
+    WHERE data.type = 'WatchEvent' GROUP BY data.repo.name ORDER BY stars DESC, data.repo.name LIMIT 5" --allow_suspicious_types_in_group_by=1 --allow_suspicious_types_in_order_by=1
+
+${CLICKHOUSE_CLIENT} --enable_analyzer=1 -q \
+"SELECT data.payload.commits[].author.name AS name, count() AS c FROM ghdata \
+    ARRAY JOIN data.payload.commits[].author.name \
+    GROUP BY name ORDER BY c DESC, name LIMIT 5" --allow_suspicious_types_in_group_by=1 --allow_suspicious_types_in_order_by=1
+
+${CLICKHOUSE_CLIENT} -q "SELECT max(data.payload.pull_request.assignees[].size0) FROM ghdata"
+
+${CLICKHOUSE_CLIENT} -q "DROP TABLE IF EXISTS ghdata"