Enum MysqlIntWidth 

pub enum MysqlIntWidth {
    Tiny,
    Small,
    Medium,
    Int,
    Big,
}

v7.39 (round 386, type-fidelity epic P1) — the declared MySQL narrow integer type for a column whose storage DataType cannot express it. MySQL TINYINT (i8, -128..127) collapses to DataType::SmallInt (i16) and MEDIUMINT (24-bit) to DataType::Int (i32) — both wider than the declared type, so a range check against ty alone accepts out-of-range values (INSERT 128 INTO TINYINT is stored silently where MariaDB strict raises ERROR 1264). This annotation records the lost width so the write path (epic P2) can enforce the real bounds. SMALLINT / INT / BIGINT need no marker — their storage DataType is already faithful. Sparse: only TINYINT / MEDIUMINT columns carry it; persisted in the FILE_VERSION 81+ appendix, older catalogs deserialise as None.

Variants

Tiny

MySQL TINYINT — signed -128..127, unsigned 0..255. Storage i16.

Small

MySQL SMALLINT UNSIGNED — 0..65535. Storage widened to i32 (a signed SMALLINT keeps DataType::SmallInt and carries no marker).

Medium

MySQL MEDIUMINT — signed -8388608..8388607, unsigned 0..16777215. Storage i32.

Int

MySQL INT UNSIGNED — 0..4294967295. Storage widened to i64 (a signed INT keeps DataType::Int and carries no marker).

Big

v7.39 (round 471, epic P4b) — MySQL BIGINT UNSIGNED — 0..18446744073709551615. i64 stops at 2^63-1, so the storage tag is widened to Numeric (i128-backed, scale 0), which already compares, orders, indexes and renders as an exact integer. A signed BIGINT keeps DataType::BigInt and carries no marker.

Trait Implementations

impl Clone for MysqlIntWidth

fn clone(&self) -> MysqlIntWidth

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for MysqlIntWidth

impl Debug for MysqlIntWidth

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for MysqlIntWidth

impl PartialEq for MysqlIntWidth

fn eq(&self, other: &MysqlIntWidth) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for MysqlIntWidth