pub trait SQLiteFromSQL: Sized {
// Required method
fn column_result(value: ValueRef<'_>) -> Result<Self, FromSqlError>;
}Expand description
A trait for types that can be created from a SQLite value.
Note that FromSql and ToSql are defined for most integral types, but
not u64 or usize. This is intentional; SQLite returns integers as
signed 64-bit values, which cannot fully represent the range of these
types. Rusqlite would have to
decide how to handle negative values: return an error or reinterpret as a
very large postive numbers, neither of which
is guaranteed to be correct for everyone. Callers can work around this by
fetching values as i64 and then doing the interpretation themselves or by
defining a newtype and implementing FromSql/ToSql for it.
Required Methods§
fn column_result(value: ValueRef<'_>) -> Result<Self, FromSqlError>
Dyn Compatibility§
This trait is not dyn compatible.
In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.