Merge 2c0f9dbfc5 into 2b3098c641

src/DataTypes/Serializations/SerializationDynamic.cpp

@@ -762,8 +762,12 @@ void SerializationDynamic::serializeTextJSON(const IColumn & column, size_t row_
 
 void SerializationDynamic::serializeTextJSONPretty(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings & settings, size_t indent) const
 {
-    const auto & dynamic_column = assert_cast<const ColumnDynamic &>(column);
-    dynamic_column.getVariantInfo().variant_type->getDefaultSerialization()->serializeTextJSONPretty(dynamic_column.getVariantColumn(), row_num, ostr, settings, indent);
+    auto nested_serialize = [&settings, indent](const ISerialization & serialization, const IColumn & col, size_t row, WriteBuffer & buf)
+    {
+        serialization.serializeTextJSONPretty(col, row, buf, settings, indent);
+    };
+
+    serializeTextImpl(column, row_num, ostr, settings, nested_serialize);
 }
 
 void SerializationDynamic::deserializeTextJSON(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const

tests/queries/0_stateless/03273_dynamic_pretty_json_serialization.reference

@@ -0,0 +1,6 @@
+{
+    "d": "Hello"
+}
+{
+    "d": "Hello"
+}

tests/queries/0_stateless/03273_dynamic_pretty_json_serialization.sql

@@ -0,0 +1,6 @@
+set allow_experimental_dynamic_type = 1;
+
+select 'Hello'::Dynamic(max_types=1) as d format PrettyJSONEachRow;
+select 'Hello'::Dynamic(max_types=0) as d format PrettyJSONEachRow;
+
+