[Repositories] Add datetime support to repositories (#1503)

common/repositories/template/base_repository.template

@@ -14,6 +14,7 @@
 
 #include "../../database.h"
 #include "../../string_util.h"
+#include <ctime>
 
 class Base{{TABLE_NAME_CLASS}}Repository {
 public:
@@ -33,11 +34,23 @@ public:
 		};
 	}
 
+	static std::vector<std::string> SelectColumns()
+	{
+		return {
+{{SELECT_COLUMNS_LIST_QUOTED}}
+		};
+	}
+
 	static std::string ColumnsRaw()
 	{
 		return std::string(implode(", ", Columns()));
 	}
 
+	static std::string SelectColumnsRaw()
+	{
+		return std::string(implode(", ", SelectColumns()));
+	}
+
 	static std::string TableName()
 	{
 		return std::string("{{TABLE_NAME_VAR}}");
@@ -47,7 +60,7 @@ public:
 	{
 		return fmt::format(
 			"SELECT {} FROM {}",
-			ColumnsRaw(),
+			SelectColumnsRaw(),
 			TableName()
 		);
 	}