Struct AlterColumnChanges 

pub struct AlterColumnChanges {
    pub new_name: Option<String>,
    pub new_ty: Option<Type>,
    pub new_not_null: Option<bool>,
    pub new_auto_increment: Option<bool>,
}

A statement to alter a column in a table.

Fields

new_name: Option<String>

New name for the column (if renaming).

new_ty: Option<Type>

New type information.

new_not_null: Option<bool>

New nullability constraint.

new_auto_increment: Option<bool>

New auto increment behavior.

Implementations

impl AlterColumnChanges

pub fn from_diff(previous: &Column, next: &Column) -> Self

Computes the set of changes between two column definitions.

Each field is Some only when the corresponding property differs between previous and next.

pub fn split(self) -> Vec<Self>

Splits up this set of changes into a Vec of individual changes.

pub fn has_type_change(&self) -> bool

Returns true if any type-level property changed (type, nullability, or auto-increment).

Trait Implementations

impl Clone for AlterColumnChanges

fn clone(&self) -> AlterColumnChanges

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AlterColumnChanges

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

Formats the value using the given formatter.