Struct ProjectExpr 

pub struct ProjectExpr {
    pub cols: Vec<ColExpr>,
    pub wildcard_table: Option<TableId>,
    pub header_after: Arc<Header>,
}

A projection operation in a query.

Fields

cols: Vec<ColExpr>

wildcard_table: Option<TableId>

header_after: Arc<Header>

Trait Implementations

impl Clone for ProjectExpr

fn clone(&self) -> ProjectExpr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ProjectExpr

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

Formats the value using the given formatter.

impl From<(Vec<ColExpr>, Option<TableId>, Arc<Header>)> for ProjectExpr

fn from(original: (Vec<ColExpr>, Option<TableId>, Arc<Header>)) -> ProjectExpr

Converts to this type from the input type.

impl From<ProjectExpr> for Query

fn from(original: ProjectExpr) -> Query

Converts to this type from the input type.

impl Hash for ProjectExpr

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 ProjectExpr

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

impl StructuralPartialEq for ProjectExpr