The earlier sections describe the operation of the database engine in normal affinity mode. QDB
features two other affinity modes:
- Strict affinity mode — if a conversion
between storage classes is ever required, the database engine
returns an error and the current statement is rolled back.
- No affinity mode — no conversions between
storage classes are ever performed. Comparisons between values of
different storage classes (except for INTEGER and REAL) are always false.