#include template <> std::string before_value() { if (Database::engine_type() == DatabaseEngine::EngineType::Sqlite3) return "julianday("; if (Database::engine_type() == DatabaseEngine::EngineType::Postgresql) return "to_timestamp("; return {}; } template <> std::string after_value() { if (Database::engine_type() == DatabaseEngine::EngineType::Sqlite3) return ", \"unixepoch\")"; if (Database::engine_type() == DatabaseEngine::EngineType::Postgresql) return ")"; return {}; }