Enum AlterColumnOperation 

pub enum AlterColumnOperation {
    SetNotNull,
    DropNotNull,
    SetDefault {
        value: Expr,
    },
    DropDefault,
    SetDataType {
        data_type: DataType,
        using: Option<Expr>,
        had_set: bool,
    },
    AddGenerated {
        generated_as: Option<GeneratedAs>,
        sequence_options: Option<Vec<SequenceOptions>>,
    },
}

An ALTER COLUMN (Statement::AlterTable) operation

Variants

SetNotNull

SET NOT NULL

DropNotNull

DROP NOT NULL

SetDefault

SET DEFAULT <expr> Set the column default value.

Fields

value: Expr

Expression representing the new default value.

DropDefault

DROP DEFAULT

SetDataType

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

Fields

data_type: DataType

Target data type for the column.

using: Option<Expr>

PostgreSQL-specific USING <expr> expression for conversion.

had_set: bool

Set to true if the statement includes the SET DATA TYPE keywords.

AddGenerated

ADD GENERATED { ALWAYS | BY DEFAULT } AS IDENTITY [ ( sequence_options ) ]

Note: this is a PostgreSQL-specific operation.

Fields

generated_as: Option<GeneratedAs>

Optional GENERATED AS specifier (e.g. ALWAYS or BY DEFAULT).

sequence_options: Option<Vec<SequenceOptions>>

Optional sequence options for identity generation.

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<(), Error>

Formats the value using the given formatter.

impl Display for AlterColumnOperation

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

Formats the value using the given formatter.

impl Hash for AlterColumnOperation

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

where __H: Hasher,

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 Ord for AlterColumnOperation

fn cmp(&self, other: &AlterColumnOperation) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

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 PartialOrd for AlterColumnOperation

fn partial_cmp(&self, other: &AlterColumnOperation) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Spanned for AlterColumnOperation

partial span

Missing spans:

• AlterColumnOperation::SetNotNull
• AlterColumnOperation::DropNotNull
• AlterColumnOperation::DropDefault
• AlterColumnOperation::AddGenerated

fn span(&self) -> Span

Return the Span (the minimum and maximum Location) for this AST node, by recursively combining the spans of its children.

impl Eq for AlterColumnOperation

impl StructuralPartialEq for AlterColumnOperation