Enum AlterColumnChange 

pub enum AlterColumnChange {
    SetDataType(DataType),
    SetNullable(bool),
    SetDefault(DefaultValue),
    DropDefault,
}

Column alteration type.

Variants

SetDataType(DataType)

Change the data type.

SetNullable(bool)

Set or remove NOT NULL constraint.

SetDefault(DefaultValue)

Set a new default value.

DropDefault

Remove the default value.

Trait Implementations

impl Clone for AlterColumnChange

fn clone(&self) -> AlterColumnChange

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AlterColumnChange

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

Formats the value using the given formatter.

impl PartialEq for AlterColumnChange

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for AlterColumnChange