Database connection.
Definition postgresql.h:242
const LevTrEntry * lookup_id(Tracer<> &trc, int id) override
Look up a LevTr from the database given its ID.
int obtain_id(Tracer<> &trc, const LevTrEntry &desc) override
Look up a LevTr from the database given its description.
void prefetch_ids(Tracer<> &trc, const std::set< int > &ids) override
Given a set of IDs, load LevTr information for them and add it to the cache.