Column<T> class final Physical schema metadata

Physical column metadata coupled to the Dart/storage Codec.

This value is usable without generated models or a connection. Schema and migration validation enforce combinations such as generated identities, nullability, defaults, and engine-specific storage limits.

Available extensions

Constructors

Column(String name, Codec<T> codec, {bool nullable = false, bool generated = false, String? defaultSql, ComputedColumn? computed, T clientDefault()?, int? integerBits, int? decimalPrecision, int? decimalScale, int? temporalPrecision})
Describes one physical column without creating or validating a database.
const

Properties

clientDefault → T Function()?
Called once for an omitted value when constructing an insert. Prepared mutations retain that value; compilation and updates never call this.
final
codec → Codec<T>
Typed conversion used for stored values and selected results.
final
computed → ComputedColumn?
Database-generated expression; computed columns are excluded from writes.
final
decimalPrecision → int?
Optional decimal column precision, separate from expression result types.
final
decimalScale → int?
Optional decimal column scale, paired with decimalPrecision.
final
defaultSql → String?
Trusted SQL default expression used when an insert omits this column.
final
generated → bool
Whether the database supplies an integer primary-key identity.
final
hashCode → int
The hash code for this object.
no setterinherited
integerBits → int?
Signed integer storage width (16, 32 or 64). The default is 64. This describes the column, not the result width of SQL arithmetic.
final
name → String
Physical SQL name, quoted as an identifier when SQL is rendered.
final
nullable → bool
Whether the physical column permits SQL NULL.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
temporalPrecision → int?
Optional fractional second precision, from 0 through 6.
final

Methods

bind(T value) → SqlValue<T>

Available on Column<T>, provided by the ColumnSql extension

Encodes a bound value using this column's domain type.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
result({String? as}) → ResultColumn<T>

Available on Column<T>, provided by the ColumnSql extension

Describes a result label without inheriting physical column constraints.
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited