Enum AlterAction 

pub enum AlterAction {
    AddColumn {
        name: String,
        type_name: String,
        required: bool,
    },
    DropColumn {
        name: String,
    },
    AddIndex {
        column: String,
    },
    AddUnique {
        column: String,
    },
}

An individual ALTER TABLE action.

Variants

AddColumn

Fields

name: String

type_name: String

required: bool

DropColumn

Fields

name: String

AddIndex

alter <Table> add index .<column> — creates a B+Tree index on column. No-op if the index already exists.

Fields

column: String

AddUnique

alter <Table> add unique .<column> — creates a UNIQUE B+Tree index on column. Scans existing data first and fails if any duplicate (non-null) value is present. Errors if the column is already indexed (no in-place upgrade).

Fields

column: String

Trait Implementations

impl Clone for AlterAction

fn clone(&self) -> AlterAction

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AlterAction

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

Formats the value using the given formatter.

impl PartialEq for AlterAction

fn eq(&self, other: &AlterAction) -> 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 AlterAction