Struct SortExpr

pub struct SortExpr {
    pub expr: Expr,
    pub asc: bool,
    pub nulls_first: bool,
}

SORT expression

Fields

expr: Expr

The expression to sort on

asc: bool

The direction of the sort

nulls_first: bool

Whether to put Nulls before all other data values

Implementations

impl Sort

pub fn new(expr: Expr, asc: bool, nulls_first: bool) -> Sort

Create a new Sort expression

pub fn reverse(&self) -> Sort

Create a new Sort expression with the opposite sort direction

pub fn with_expr(&self, expr: Expr) -> Sort

Replaces the Sort expressions with expr

Trait Implementations

impl Clone for Sort

fn clone(&self) -> Sort

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Sort

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

Formats the value using the given formatter.

impl Display for Sort

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

Formats the value using the given formatter.

impl From<PySortExpr> for SortExpr

fn from(sort: PySortExpr) -> Self

Converts to this type from the input type.

impl From<Sort> for PySortExpr

fn from(sort: SortExpr) -> PySortExpr

Converts to this type from the input type.

impl Hash for Sort

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 PartialEq for Sort

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

fn partial_cmp(&self, other: &Sort) -> 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<'a> TreeNodeContainer<'a, Expr> for Sort

fn apply_elements<F>( &'a self, f: F, ) -> Result<TreeNodeRecursion, DataFusionError>

where F: FnMut(&'a Expr) -> Result<TreeNodeRecursion, DataFusionError>,

Applies f to all elements of the container. This method is usually called from TreeNode::apply_children implementations as a node is actually a container of the node’s children.

fn map_elements<F>(self, f: F) -> Result<Transformed<Sort>, DataFusionError>

where F: FnMut(Expr) -> Result<Transformed<Expr>, DataFusionError>,

Maps all elements of the container with f. This method is usually called from TreeNode::map_children implementations as a node is actually a container of the node’s children.

impl Eq for Sort

impl StructuralPartialEq for Sort