Enum AlterKind 

pub enum AlterKind {
    RenameTable {
        to: Vec<u8>,
    },
    RenameColumn {
        from: Vec<u8>,
        to: Vec<u8>,
    },
    AddColumn {
        start: u32,
        end: u32,
        risk: AddedColumnRisk,
    },
    DropColumn {
        name: Vec<u8>,
        position: u16,
    },
}

What an ALTER TABLE does, with every name already resolved.

Variants

RenameTable

RENAME TO.

Fields

to: Vec<u8>

The new name, as written.

RenameColumn

RENAME COLUMN a TO b.

Fields

from: Vec<u8>

The column’s current name, as stored.

to: Vec<u8>

Its new name, as written.

AddColumn

ADD COLUMN.

Fields

start: u32

Where the definition starts in the statement’s own source.

The offsets rather than the text, for the same reason CREATE TABLE carries an offset: the executor has the statement’s source and slicing it there keeps the written definition - its spacing, its case and its comments - rather than something re-rendered from the parse.

end: u32

Where it ends.

risk: AddedColumnRisk

What it would do to rows that already exist.

DropColumn

DROP COLUMN.

Fields

name: Vec<u8>

The column’s name, as stored.

position: u16

Its declared position, which is the record slot to remove.

Trait Implementations

impl Clone for AlterKind

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AlterKind

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

Formats the value using the given formatter.

impl Eq for AlterKind

impl PartialEq for AlterKind

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for AlterKind