Say I have a PostgreSQL database, and I store the maximum value of an int64_t or an uint64_t in a column of the NUMERIC type (I cannot use the BIGINT type as there is no unsigned variant for the uint64_t in PostgreSQL).

Looking at https://doc.qt.io/qt-6/sql-types.html#postgresql-data-types, it seems that NUMERIC is mapped to qreal (= double), which obviously won’t be able to hold those values without loss of precision.

Is there a way to remap the default QVariant mapping to something else without modifying the driver? Or, is there an alternative way to retrieve such values without casting them to string on the DB side?