Struct mz_sql::plan::expr::ValueWindowExpr

pub struct ValueWindowExpr {
    pub func: ValueWindowFunc,
    pub args: Box<HirScalarExpr>,
    pub order_by: Vec<ColumnOrder>,
    pub window_frame: WindowFrame,
    pub ignore_nulls: bool,
}

Fields

func: ValueWindowFunc

args: Box<HirScalarExpr>

If the argument list has a single element (e.g., for first_value), then it’s that element. If the argument list has multiple elements (e.g., for lag), then it’s encoded in a record, e.g., row(#1, 3, null). If it’s a fused window function, then the arguments of each of the constituent function calls are wrapped in an outer record.

order_by: Vec<ColumnOrder>

See comment on WindowExpr::order_by.

window_frame: WindowFrame

ignore_nulls: bool

Implementations

impl ValueWindowExpr

pub fn visit_expressions<'a, F, E>(&'a self, f: &mut F) -> Result<(), E>

where F: FnMut(&'a HirScalarExpr) -> Result<(), E>,

👎Deprecated: Use VisitChildren<HirScalarExpr>::visit_children instead.

pub fn visit_expressions_mut<'a, F, E>(&'a mut self, f: &mut F) -> Result<(), E>

where F: FnMut(&'a mut HirScalarExpr) -> Result<(), E>,

👎Deprecated: Use VisitChildren<HirScalarExpr>::visit_mut_children instead.

fn typ( &self, outers: &[RelationType], inner: &RelationType, params: &BTreeMap<usize, ScalarType>, ) -> ColumnType

pub fn into_expr(self) -> (Box<HirScalarExpr>, AggregateFunc)

Converts into mz_expr::AggregateFunc.

Trait Implementations

impl Clone for ValueWindowExpr

fn clone(&self) -> ValueWindowExpr

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ValueWindowExpr

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ValueWindowExpr

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Hash for ValueWindowExpr

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 Ord for ValueWindowExpr

fn cmp(&self, other: &ValueWindowExpr) -> 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 + PartialOrd,

Restrict a value to a certain interval.

impl PartialEq for ValueWindowExpr

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

fn partial_cmp(&self, other: &ValueWindowExpr) -> 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 Serialize for ValueWindowExpr

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl VisitChildren<HirScalarExpr> for ValueWindowExpr

fn visit_children<F>(&self, f: F)

where F: FnMut(&HirScalarExpr),

Apply an infallible immutable function f to each direct child.

fn visit_mut_children<F>(&mut self, f: F)

where F: FnMut(&mut HirScalarExpr),

Apply an infallible mutable function f to each direct child.

fn try_visit_children<F, E>(&self, f: F) -> Result<(), E>

where F: FnMut(&HirScalarExpr) -> Result<(), E>, E: From<RecursionLimitError>,

Apply a fallible immutable function f to each direct child.

fn try_visit_mut_children<F, E>(&mut self, f: F) -> Result<(), E>

where F: FnMut(&mut HirScalarExpr) -> Result<(), E>, E: From<RecursionLimitError>,

Apply a fallible mutable function f to each direct child.

impl Eq for ValueWindowExpr

impl StructuralPartialEq for ValueWindowExpr