Enum AlterColumnOperation 

pub enum AlterColumnOperation {
    SetNotNull,
    DropNotNull,
    SetDefault {
        value: Expr,
    },
    DropDefault,
    SetDataType {
        data_type: DataType,
        using: Option<Expr>,
    },
}

An ALTER COLUMN (Statement::AlterTable) operation

Variants

SetNotNull

SET NOT NULL

DropNotNull

DROP NOT NULL

SetDefault

SET DEFAULT <expr>

Fields

value: Expr

DropDefault

DROP DEFAULT

SetDataType

[SET DATA] TYPE <data_type> [USING <expr>]

Fields

data_type: DataType

using: Option<Expr>

PostgreSQL specific

Trait Implementations

impl Clone for AlterColumnOperation

fn clone(&self) -> AlterColumnOperation

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AlterColumnOperation

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

Formats the value using the given formatter.

impl Display for AlterColumnOperation

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

Formats the value using the given formatter.

impl Hash for AlterColumnOperation

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for AlterColumnOperation

fn eq(&self, other: &AlterColumnOperation) -> 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 Eq for AlterColumnOperation

impl StructuralPartialEq for AlterColumnOperation