should be it

external/duckdb/extension/tpcds/dsdgen/include/dsdgen_helpers.hpp

@@ -0,0 +1,19 @@
+#pragma once
+
+#include "append_info-c.hpp"
+
+#include <cstdint>
+
+namespace tpcds {
+
+typedef int64_t ds_key_t;
+
+typedef int (*tpcds_builder_func)(void *, ds_key_t);
+
+void InitializeDSDgen(double scale);
+ds_key_t GetRowCount(int table_id);
+void ResetCountCount();
+tpcds_table_def GetTDefByNumber(int table_id);
+tpcds_builder_func GetTDefFunctionByNumber(int table_id);
+
+}; // namespace tpcds