Struct Alias 

pub struct Alias {
    pub expr: Box<Expr>,
    pub relation: Option<TableReference>,
    pub name: String,
    pub metadata: Option<FieldMetadata>,
}

Alias expression

Fields

expr: Box<Expr>

relation: Option<TableReference>

name: String

metadata: Option<FieldMetadata>

Implementations

impl Alias

pub fn new( expr: Expr, relation: Option<impl Into<TableReference>>, name: impl Into<String>, ) -> Self

Create an alias with an optional schema/field qualifier.

pub fn with_metadata(self, metadata: Option<FieldMetadata>) -> Self

Trait Implementations

impl Clone for Alias

fn clone(&self) -> Alias

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Alias

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

Formats the value using the given formatter.

impl Hash for Alias

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 Alias

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

fn partial_cmp(&self, other: &Self) -> 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 Eq for Alias

impl StructuralPartialEq for Alias