diff --git a/ext/arrow-duckdb/arrow-duckdb-registration.cpp b/ext/arrow-duckdb/arrow-duckdb-registration.cpp
index 2e770af..42ad772 100644
--- a/ext/arrow-duckdb/arrow-duckdb-registration.cpp
+++ b/ext/arrow-duckdb/arrow-duckdb-registration.cpp
@@ -163,14 +163,11 @@ namespace {
   }
 
   arrow::compute::Expression
-  convert_filters(std::unordered_map<
-                    idx_t,
-                    std::unique_ptr<duckdb::TableFilter>
-                  > &filters,
+  convert_filters(duckdb::TableFilterSet *filter_set,
                   std::unordered_map<idx_t, std::string> &column_names)
   {
     std::vector<arrow::compute::Expression> expressions;
-    for (auto it = filters.begin(); it != filters.end(); ++it) {
+    for (auto it = filter_set->filters.begin(); it != filter_set->filters.end(); ++it) {
       expressions.emplace_back(
         std::move(convert_filter(it->second.get(), column_names[it->first])));
     }
@@ -192,7 +189,7 @@ namespace {
     if (have_filter) {
       ARROW_RETURN_NOT_OK(
         scanner_builder->Filter(
-          convert_filters(parameters.filters->filters,
+          convert_filters(parameters.filters,
                           parameters.projected_columns.projection_map)));
     }
     if (!parameters.projected_columns.columns.empty()) {
@@ -202,7 +199,7 @@ namespace {
     }
     ARROW_ASSIGN_OR_RAISE(auto scanner, scanner_builder->Finish());
     ARROW_ASSIGN_OR_RAISE(auto reader, scanner->ToRecordBatchReader());
-    auto stream_wrapper = duckdb::make_unique<duckdb::ArrowArrayStreamWrapper>();
+    auto stream_wrapper = duckdb::make_uniq<duckdb::ArrowArrayStreamWrapper>();
     ARROW_RETURN_NOT_OK(
       arrow::ExportRecordBatchReader(reader,
                                      &(stream_wrapper->arrow_array_stream)));
@@ -227,8 +224,13 @@ namespace {
   {
     auto garrow_table = GARROW_TABLE(reinterpret_cast<gpointer>(data));
     auto arrow_table = garrow_table_get_raw(garrow_table);
-    arrow::ExportSchema(*(arrow_table->schema()),
-                        reinterpret_cast<ArrowSchema *>(&schema));
+    auto export_schema_status = arrow::ExportSchema(*(arrow_table->schema()),
+                                                    reinterpret_cast<ArrowSchema *>(&schema));
+    if (!export_schema_status.ok()) {
+      throw std::runtime_error(
+        std::string("[arrow][get_schema] failed to export schema: ") +
+        export_schema_status.ToString());
+    }
   }
 }
 
diff --git a/ext/arrow-duckdb/arrow-duckdb.cpp b/ext/arrow-duckdb/arrow-duckdb.cpp
index f3bdc2c..b8b9160 100644
--- a/ext/arrow-duckdb/arrow-duckdb.cpp
+++ b/ext/arrow-duckdb/arrow-duckdb.cpp
@@ -20,7 +20,9 @@
 
 #include <rbgobject.h>
 
+extern "C" {
 #include <ruby-duckdb.h>
+}
 
 #include "arrow-duckdb-registration.hpp"
 
@@ -99,7 +101,7 @@ namespace {
   result_ensure_gschema(Result *result)
   {
     ArrowSchema c_abi_schema;
-    duckdb_arrow_schema schema = &c_abi_schema;
+    auto schema = reinterpret_cast<duckdb_arrow_schema>(&c_abi_schema);
     auto state = duckdb_query_arrow_schema(result->arrow, &schema);
     if (state == DuckDBError) {
       free(result->error_message);
@@ -121,7 +123,7 @@ namespace {
   result_fetch_internal(VALUE self, Result *result)
   {
     ArrowArray c_abi_array = {};
-    duckdb_arrow_array array = &c_abi_array;
+    auto array = reinterpret_cast<duckdb_arrow_array>(&c_abi_array);
     auto state = duckdb_query_arrow_array(result->arrow, &array);
     if (state == DuckDBError) {
       free(result->error_message);
@@ -219,8 +221,7 @@ namespace {
   VALUE
   query_sql_arrow(VALUE self, VALUE sql)
   {
-    rubyDuckDBConnection *ctx;
-    Data_Get_Struct(self, rubyDuckDBConnection, ctx);
+    auto ctx = get_struct_connection(self);
 
     if (!(ctx->con)) {
       rb_raise(eDuckDBError, "Database connection closed");
@@ -253,8 +254,7 @@ namespace {
   VALUE
   query_unregister_arrow(VALUE self, VALUE name)
   {
-    rubyDuckDBConnection *ctx;
-    Data_Get_Struct(self, rubyDuckDBConnection, ctx);
+    auto ctx = get_struct_connection(self);
 
     if (!(ctx->con)) {
       rb_raise(eDuckDBError, "Database connection closed");
@@ -293,8 +293,7 @@ namespace {
   VALUE
   query_register_arrow(VALUE self, VALUE name, VALUE arrow_table)
   {
-    rubyDuckDBConnection *ctx;
-    Data_Get_Struct(self, rubyDuckDBConnection, ctx);
+    auto ctx = get_struct_connection(self);
 
     if (!(ctx->con)) {
       rb_raise(eDuckDBError, "Database connection closed");
@@ -329,8 +328,7 @@ namespace {
   VALUE
   prepared_statement_execute_arrow(VALUE self)
   {
-    rubyDuckDBPreparedStatement *ctx;
-    Data_Get_Struct(self, rubyDuckDBPreparedStatement, ctx);
+    auto ctx = get_struct_prepared_statement(self);
 
     ID id_new;
     CONST_ID(id_new, "new");
diff --git a/test/test-connection.rb b/test/test-connection.rb
index 22d84d4..23b72ec 100644
--- a/test/test-connection.rb
+++ b/test/test-connection.rb
@@ -35,7 +35,7 @@ def setup
       result = @connection.query("SELECT * FROM users WHERE name = ?",
                                  'alice',
                                  output: :arrow)
-      assert_equal([Arrow::RecordBatch.new("string" => ["alice"])],
+      assert_equal([Arrow::RecordBatch.new("name" => ["alice"])],
                    result.to_a)
     end
   end
diff --git a/test/test-prepared-statement.rb b/test/test-prepared-statement.rb
index 43b555e..3b21826 100644
--- a/test/test-prepared-statement.rb
+++ b/test/test-prepared-statement.rb
@@ -28,7 +28,7 @@ def setup
 
   test("#execute_arrow") do
     @prepared_statement.bind(1, "alice")
-    assert_equal([Arrow::RecordBatch.new("string" => ["alice"])],
+    assert_equal([Arrow::RecordBatch.new("name" => ["alice"])],
                  @prepared_statement.execute_arrow.to_a)
   end
 end