Enum SelectItem

pub enum SelectItem {
    UnnamedExpr(Expr),
    ExprQualifiedWildcard(Expr, Vec<Ident>),
    ExprWithAlias {
        expr: Expr,
        alias: Ident,
    },
    QualifiedWildcard(ObjectName, Option<Vec<Expr>>),
    Wildcard(Option<Vec<Expr>>),
}

One item of the comma-separated list following SELECT

Variants

UnnamedExpr(Expr)

Any expression, not followed by [ AS ] alias

ExprQualifiedWildcard(Expr, Vec<Ident>)

Expr is an arbitrary expression, returning either a table or a column. Idents are the prefix of *, which are consecutive field accesses. e.g. (table.v1).* or (table).v1.*

ExprWithAlias

An expression, followed by [ AS ] alias

Fields

expr: Expr

alias: Ident

QualifiedWildcard(ObjectName, Option<Vec<Expr>>)

alias.* or even schema.table.* followed by optional except

Wildcard(Option<Vec<Expr>>)

An unqualified *, or * except (exprs)

Trait Implementations

impl Clone for SelectItem

fn clone(&self) -> SelectItem

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for SelectItem

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

Formats the value using the given formatter.

impl Display for SelectItem

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

Formats the value using the given formatter.

impl Hash for SelectItem

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 SelectItem

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

impl StructuralPartialEq for SelectItem