[Fix](pyudf) Fix error type conversion

be/src/exprs/aggregate/aggregate_function_python_udaf.cpp

@@ -252,7 +252,9 @@ void AggregatePythonUDAF::create(AggregateDataPtr __restrict place) const {
                                        "Failed to convert argument type {} to Arrow type: {}", i,
                                        st.to_string());
             }
-            fields.push_back(arrow::field(std::to_string(i), arrow_type));
+            auto primitive_type = argument_types[i]->get_primitive_type();
+            fields.push_back(create_arrow_field_with_metadata(std::to_string(i), arrow_type,
+                                                              true, primitive_type));
         }
 
         // Add places column for GROUP BY aggregation (always included, NULL in single-place mode)

be/src/format/arrow/arrow_row_batch.cpp

@@ -172,7 +172,7 @@ Status convert_to_arrow_type(const DataTypePtr& origin_type,
 }
 
 // Helper function to create an Arrow Field with type metadata if applicable, such as IP types
-static std::shared_ptr<arrow::Field> create_arrow_field_with_metadata(
+std::shared_ptr<arrow::Field> create_arrow_field_with_metadata(
         const std::string& field_name, const std::shared_ptr<arrow::DataType>& arrow_type,
         bool is_nullable, PrimitiveType primitive_type) {
     if (primitive_type == PrimitiveType::TYPE_IPV4) {
@@ -181,6 +181,9 @@ static std::shared_ptr<arrow::Field> create_arrow_field_with_metadata(
     } else if (primitive_type == PrimitiveType::TYPE_IPV6) {
         auto metadata = arrow::KeyValueMetadata::Make({"doris_type"}, {"IPV6"});
         return std::make_shared<arrow::Field>(field_name, arrow_type, is_nullable, metadata);
+    } else if (primitive_type == PrimitiveType::TYPE_LARGEINT) {
+        auto metadata = arrow::KeyValueMetadata::Make({"doris_type"}, {"LARGEINT"});
+        return std::make_shared<arrow::Field>(field_name, arrow_type, is_nullable, metadata);
     } else {
         return std::make_shared<arrow::Field>(field_name, arrow_type, is_nullable);
     }

be/src/format/arrow/arrow_row_batch.h

@@ -22,6 +22,7 @@
 
 #include "common/status.h"
 #include "core/block/block.h"
+#include "core/data_type/define_primitive_type.h"
 #include "exprs/vexpr_fwd.h"
 
 // This file will convert Doris RowBatch to/from Arrow's RecordBatch
@@ -31,6 +32,7 @@
 namespace arrow {
 
 class DataType;
+class Field;
 class RecordBatch;
 class Schema;
 
@@ -42,8 +44,14 @@ constexpr size_t MAX_ARROW_UTF8 = (1ULL << 21); // 2G
 
 class RowDescriptor;
 
-Status convert_to_arrow_type(const DataTypePtr& type, std::shared_ptr<arrow::DataType>* result,
-                             const std::string& timezone);
+// Create an Arrow Field with doris_type metadata for special types (IPV4, IPV6, LARGEINT).
+// These types require metadata so the Python UDF server can perform proper type conversion.
+std::shared_ptr<arrow::Field> create_arrow_field_with_metadata(
+        const std::string& field_name, const std::shared_ptr<arrow::DataType>& arrow_type,
+        bool is_nullable, PrimitiveType primitive_type);
+
+Status convert_to_arrow_type(const vectorized::DataTypePtr& type,
+                             std::shared_ptr<arrow::DataType>* result, const std::string& timezone);
 
 Status get_arrow_schema_from_block(const Block& block, std::shared_ptr<arrow::Schema>* result,
                                    const std::string& timezone);

be/src/udf/python/python_server.py

@@ -288,25 +288,40 @@ def convert_arrow_field_to_python(field, column_metadata=None):
                         )
                         return value
                 return None
+        # Handle Doris LARGEINT type (Arrow utf8 -> Python int)
+        elif doris_type in (b'LARGEINT', 'LARGEINT'):
+            if pa.types.is_string(field.type) or pa.types.is_large_string(field.type):
+                value = field.as_py()
+                if value is not None:
+                    try:
+                        return int(value)
+                    except (ValueError, TypeError) as e:
+                        logging.warning(
+                            "Failed to convert string '%s' to int (LARGEINT): %s", value, e
+                        )
+                        return value
+                return None
 
     return field.as_py()
 
 
-def convert_python_to_arrow_value(value, output_type=None):
+def convert_python_to_arrow_value(value, output_type=None, output_metadata=None):
     """
     Convert Python value back to Arrow-compatible value.
 
-    This function handles the reverse conversion of IP addresses:
+    This function handles the reverse conversion of special types:
     - ipaddress.IPv4Address -> int (with uint32 to int32 conversion)
     - ipaddress.IPv6Address -> str (for Arrow utf8)
+    - Python int -> str (for LARGEINT, which uses Arrow utf8)
 
     Type Safety:
         For IPv4/IPv6 return types, MUST return ipaddress objects.
         Returning raw integers or strings will raise TypeError.
 
     Args:
         value: Python value to convert (can be single value or iterable)
-        output_type: Optional Arrow DataType with metadata
+        output_type: Optional Arrow DataType
+        output_metadata: Optional metadata dict from the output Arrow field
 
     Returns:
         Arrow-compatible value
@@ -316,14 +331,23 @@ def convert_python_to_arrow_value(value, output_type=None):
 
     is_ipv4_output = False
     is_ipv6_output = False
+    is_largeint_output = False
 
-    if output_type is not None and hasattr(output_type, 'metadata') and output_type.metadata:
+    # Check output_metadata (from field metadata, passed explicitly)
+    metadata = output_metadata
+    # Fallback: check output_type.metadata (for compound types like struct fields)
+    if metadata is None and output_type is not None and hasattr(output_type, 'metadata') and output_type.metadata:
+        metadata = output_type.metadata
+
+    if metadata:
         # Arrow metadata keys can be either bytes or str depending on how they were created
-        doris_type = output_type.metadata.get(b'doris_type') or output_type.metadata.get('doris_type')
+        doris_type = metadata.get(b'doris_type') or metadata.get('doris_type')
         if doris_type in (b'IPV4', 'IPV4'):
             is_ipv4_output = True
         elif doris_type in (b'IPV6', 'IPV6'):
             is_ipv6_output = True
+        elif doris_type in (b'LARGEINT', 'LARGEINT'):
+            is_largeint_output = True
 
     # Convert IPv4Address back to int
     if isinstance(value, ipaddress.IPv4Address):
@@ -333,6 +357,10 @@ def convert_python_to_arrow_value(value, output_type=None):
     if isinstance(value, ipaddress.IPv6Address):
         return str(value)
 
+    # Convert Python int back to str for LARGEINT (Arrow uses utf8 for LARGEINT)
+    if is_largeint_output and isinstance(value, int):
+        return str(value)
+
     # IPv4 output must return IPv4Address objects
     if is_ipv4_output and isinstance(value, int):
         raise TypeError(
@@ -352,10 +380,10 @@ def convert_python_to_arrow_value(value, output_type=None):
         # For list types, recursively convert elements
         if output_type and pa.types.is_list(output_type):
             element_type = output_type.value_type
-            return [convert_python_to_arrow_value(v, element_type) for v in value]
+            return [convert_python_to_arrow_value(v, element_type, output_metadata) for v in value]
         else:
             # No type info, just recurse without type
-            return [convert_python_to_arrow_value(v, None) for v in value]
+            return [convert_python_to_arrow_value(v, None, output_metadata) for v in value]
 
     # Handle tuple values (could be struct data)
     if isinstance(value, tuple):
@@ -373,7 +401,7 @@ def convert_python_to_arrow_value(value, output_type=None):
         else:
             # Not a struct type, treat as regular tuple and recurse without type
             return tuple(convert_python_to_arrow_value(v, None) for v in value)
-    
+
     if isinstance(value, dict):
         # For map types, convert keys and values recursively
         if output_type and pa.types.is_map(output_type):
@@ -393,7 +421,7 @@ def convert_python_to_arrow_value(value, output_type=None):
                     for k, v in value.items()]
 
     if isinstance(value, pd.Series):
-        return value.apply(lambda v: convert_python_to_arrow_value(v, output_type))
+        return value.apply(lambda v: convert_python_to_arrow_value(v, output_type, output_metadata))
 
     return value
 
@@ -473,6 +501,7 @@ def __init__(
         input_types: pa.Schema,
         output_type: pa.DataType,
         client_type: int,
+        output_metadata: Optional[dict] = None,
     ) -> None:
         """
         Initialize Python UDF metadata.
@@ -488,6 +517,7 @@ def __init__(
             input_types: PyArrow schema for input parameters
             output_type: PyArrow data type for return value
             client_type: 0 for UDF, 1 for UDAF, 2 for UDTF
+            output_metadata: Optional metadata dict from the output Arrow field
         """
         self.name = name
         self.symbol = symbol
@@ -499,6 +529,7 @@ def __init__(
         self.input_types = input_types
         self.output_type = output_type
         self.client_type = ClientType(client_type)
+        self.output_metadata = output_metadata
 
     def is_udf(self) -> bool:
         """Check if this is a UDF (User-Defined Function)."""
@@ -627,7 +658,7 @@ def _scalar_call(self, record_batch: pa.RecordBatch) -> pa.Array:
                         f"please check the always_nullable property in create function statement, "
                         f"it should be true"
                     )
-                result.append(convert_python_to_arrow_value(res, self.python_udf_meta.output_type))
+                result.append(convert_python_to_arrow_value(res, self.python_udf_meta.output_type, self.python_udf_meta.output_metadata))
             except Exception as e:
                 logging.error(
                     "Error in scalar UDF execution at row %s: %s\nArgs: %s\nTraceback: %s",
@@ -697,7 +728,7 @@ def _vectorized_call(self, record_batch: pa.RecordBatch) -> pa.Array:
             )
             raise RuntimeError(f"Error in vectorized UDF: {e}") from e
 
-        result = convert_python_to_arrow_value(result, self.python_udf_meta.output_type)
+        result = convert_python_to_arrow_value(result, self.python_udf_meta.output_type, self.python_udf_meta.output_metadata)
 
         # Convert result to PyArrow Array
         result_array = None
@@ -1614,6 +1645,7 @@ def parse_python_udf_meta(
             return None
 
         output_type = output_schema.field(0).type
+        output_metadata = output_schema.field(0).metadata
 
         python_udf_meta = PythonUDFMeta(
             name=name,
@@ -1626,6 +1658,7 @@ def parse_python_udf_meta(
             input_types=input_schema,
             output_type=output_type,
             client_type=client_type,
+            output_metadata=output_metadata,
         )
 
         return python_udf_meta
@@ -1887,13 +1920,14 @@ def _handle_udaf_finalize(
         place_id: int,
         output_type: pa.DataType,
         state_manager: UDAFStateManager,
+        output_metadata: Optional[dict] = None,
     ) -> pa.RecordBatch:
         """Handle UDAF FINALIZE operation.
 
         Returns: [result: output_type] (null if failed)
         """
         try:
-            result = convert_python_to_arrow_value(state_manager.finalize(place_id), output_type)
+            result = convert_python_to_arrow_value(state_manager.finalize(place_id), output_type, output_metadata)
         except Exception as e:
             logging.error(
                 "FINALIZE operation failed for place_id=%s: %s",
@@ -2171,7 +2205,8 @@ def _handle_exchange_udaf(
                     )
                 elif operation_type == UDAFOperationType.FINALIZE:
                     result_batch_finalize = self._handle_udaf_finalize(
-                        place_id, python_udaf_meta.output_type, state_manager
+                        place_id, python_udaf_meta.output_type, state_manager,
+                        python_udaf_meta.output_metadata
                     )
                     # Serialize the result to binary (including NULL results)
                     # NULL is a valid aggregation result, not an error
@@ -2302,7 +2337,8 @@ def _handle_exchange_udtf(
             # Process all input rows and build ListArray
             try:
                 response_batch = self._process_udtf_with_list_array(
-                    udtf_func, input_batch, python_udtf_meta.output_type
+                    udtf_func, input_batch, python_udtf_meta.output_type,
+                    python_udtf_meta.output_metadata
                 )
 
                 # Send the response batch
@@ -2339,6 +2375,7 @@ def _process_udtf_with_list_array(
         udtf_func: Callable,
         input_batch: pa.RecordBatch,
         expected_output_type: pa.DataType,
+        output_metadata: Optional[dict] = None,
     ) -> pa.RecordBatch:
         """
         Process UDTF function on all input rows and generate a ListArray.
@@ -2347,6 +2384,7 @@ def _process_udtf_with_list_array(
             udtf_func: The UDTF function to call
             input_batch: Input RecordBatch with N rows
             expected_output_type: Expected Arrow type for output data
+            output_metadata: Optional metadata dict from the output Arrow field
 
         Returns:
             RecordBatch with a single ListArray column where each element
@@ -2424,7 +2462,7 @@ def _process_udtf_with_list_array(
 
             all_results.append(row_outputs)
 
-        all_results = convert_python_to_arrow_value(all_results, expected_output_type)
+        all_results = convert_python_to_arrow_value(all_results, expected_output_type, output_metadata)
 
         try:
             list_array = pa.array(all_results, type=pa.list_(expected_output_type))

be/src/udf/python/python_udf_meta.cpp

@@ -18,6 +18,7 @@
 #include "udf/python/python_udf_meta.h"
 
 #include <arrow/util/base64.h>
+#include <arrow/util/key_value_metadata.h>
 #include <fmt/core.h>
 #include <rapidjson/stringbuffer.h>
 #include <rapidjson/writer.h>
@@ -30,15 +31,35 @@
 
 namespace doris {
 
+// Create an Arrow Field with doris_type metadata for special types (e.g. IP, LARGEINT)
+std::shared_ptr<arrow::Field> PythonUDFMeta::create_field_with_doris_metadata(
+        const std::string& field_name, const std::shared_ptr<arrow::DataType>& arrow_type,
+        bool is_nullable, PrimitiveType primitive_type) {
+    static const std::unordered_map<PrimitiveType, std::string> doris_type_metadata = {
+            {PrimitiveType::TYPE_IPV4, "IPV4"},
+            {PrimitiveType::TYPE_IPV6, "IPV6"},
+            {PrimitiveType::TYPE_LARGEINT, "LARGEINT"},
+    };
+
+    auto it = doris_type_metadata.find(primitive_type);
+    if (it != doris_type_metadata.end()) {
+        auto metadata = arrow::KeyValueMetadata::Make({"doris_type"}, {it->second});
+        return std::make_shared<arrow::Field>(field_name, arrow_type, is_nullable, metadata);
+    }
+    return std::make_shared<arrow::Field>(field_name, arrow_type, is_nullable);
+}
+
 Status PythonUDFMeta::convert_types_to_schema(const DataTypes& types, const std::string& timezone,
                                               std::shared_ptr<arrow::Schema>* schema) {
     assert(!types.empty());
     arrow::SchemaBuilder builder;
     for (size_t i = 0; i < types.size(); ++i) {
         std::shared_ptr<arrow::DataType> arrow_type;
         RETURN_IF_ERROR(convert_to_arrow_type(types[i], &arrow_type, timezone));
-        std::shared_ptr<arrow::Field> field = std::make_shared<arrow::Field>(
-                "arg" + std::to_string(i), arrow_type, types[i]->is_nullable());
+
+        auto field = create_field_with_doris_metadata("arg" + std::to_string(i), arrow_type,
+                                                      types[i]->is_nullable(),
+                                                      types[i]->get_primitive_type());
         RETURN_DORIS_STATUS_IF_ERROR(builder.AddField(field));
     }
     RETURN_DORIS_STATUS_IF_RESULT_ERROR(schema, builder.Finish());

be/src/udf/python/python_udf_meta.h

@@ -59,6 +59,11 @@ struct PythonUDFMeta {
     Status check() const;
 
     bool operator==(const PythonUDFMeta& other) const { return id == other.id; }
+
+private:
+    std::shared_ptr<arrow::Field> create_field_with_doris_metadata(
+            const std::string& field_name, const std::shared_ptr<arrow::DataType>& arrow_type,
+            bool is_nullable, PrimitiveType primitive_type);
 };
 
 } // namespace doris

be/test/core/data_type_serde/data_type_serde_arrow_test.cpp

@@ -387,6 +387,16 @@ std::shared_ptr<Block> create_test_block(std::vector<PrimitiveType> cols, int ro
             ColumnWithTypeAndName type_and_name(vec->get_ptr(), data_type, col_name);
             block->insert(std::move(type_and_name));
         } break;
+        case TYPE_LARGEINT: {
+            auto vec = ColumnInt128::create();
+            auto& data = vec->get_data();
+            for (int i = 0; i < row_num; ++i) {
+                data.push_back(__int128_t(i));
+            }
+            DataTypePtr data_type(std::make_shared<DataTypeInt128>());
+            ColumnWithTypeAndName type_and_name(vec->get_ptr(), data_type, col_name);
+            block->insert(std::move(type_and_name));
+        } break;
         default:
             LOG(FATAL) << "error column type";
         }
@@ -425,9 +435,9 @@ void block_converter_test(std::vector<PrimitiveType> cols, int row_num, bool is_
 
 TEST(DataTypeSerDeArrowTest, DataTypeScalaSerDeTest) {
     std::vector<PrimitiveType> cols = {
-            TYPE_INT,        TYPE_INT,       TYPE_STRING, TYPE_DECIMAL128I, TYPE_BOOLEAN,
-            TYPE_DECIMAL32,  TYPE_DECIMAL64, TYPE_IPV4,   TYPE_IPV6,        TYPE_DATETIME,
-            TYPE_DATETIMEV2, TYPE_DATE,      TYPE_DATEV2,
+            TYPE_INT,       TYPE_INT,        TYPE_STRING, TYPE_DECIMAL128I, TYPE_BOOLEAN,
+            TYPE_DECIMAL32, TYPE_DECIMAL64,  TYPE_IPV4,   TYPE_IPV6,        TYPE_LARGEINT,
+            TYPE_DATETIME,  TYPE_DATETIMEV2, TYPE_DATE,   TYPE_DATEV2,
     };
     serialize_and_deserialize_arrow_test(cols, 7, true);
     serialize_and_deserialize_arrow_test(cols, 7, false);
@@ -506,9 +516,9 @@ TEST(DataTypeSerDeArrowTest, BigStringSerDeTest) {
 
 TEST(DataTypeSerDeArrowTest, BlockConverterTest) {
     std::vector<PrimitiveType> cols = {
-            TYPE_INT,        TYPE_INT,       TYPE_STRING, TYPE_DECIMAL128I, TYPE_BOOLEAN,
-            TYPE_DECIMAL32,  TYPE_DECIMAL64, TYPE_IPV4,   TYPE_IPV6,        TYPE_DATETIME,
-            TYPE_DATETIMEV2, TYPE_DATE,      TYPE_DATEV2,
+            TYPE_INT,       TYPE_INT,        TYPE_STRING, TYPE_DECIMAL128I, TYPE_BOOLEAN,
+            TYPE_DECIMAL32, TYPE_DECIMAL64,  TYPE_IPV4,   TYPE_IPV6,        TYPE_LARGEINT,
+            TYPE_DATETIME,  TYPE_DATETIMEV2, TYPE_DATE,   TYPE_DATEV2,
     };
     block_converter_test(cols, 7, true);
     block_converter_test(cols, 7, false);