Struct sql::func::Operation

struct Operation<R>(Box<dyn Fn(&ExprContext<'_>, Vec<CoercibleScalarExpr>, &ParamList, Vec<ColumnOrder>) -> Result<R, PlanError> + Send + Sync>);

Builds an expression that evaluates a scalar function on the provided input expressions.

Tuple Fields

0: Box<dyn Fn(&ExprContext<'_>, Vec<CoercibleScalarExpr>, &ParamList, Vec<ColumnOrder>) -> Result<R, PlanError> + Send + Sync>

Implementations

impl Operation<HirScalarExpr>

fn identity() -> Operation<HirScalarExpr>

Builds a unary operation that simply returns its input.

impl<R: GetReturnType> Operation<R>

fn new<F>(f: F) -> Operation<R> where
    F: Fn(&ExprContext<'_>, Vec<CoercibleScalarExpr>, &ParamList, Vec<ColumnOrder>) -> Result<R, PlanError> + Send + Sync + 'static, 

fn nullary<F>(f: F) -> Operation<R> where
    F: Fn(&ExprContext<'_>) -> Result<R, PlanError> + Send + Sync + 'static, 

Builds an operation that takes no arguments.

fn unary<F>(f: F) -> Operation<R> where
    F: Fn(&ExprContext<'_>, HirScalarExpr) -> Result<R, PlanError> + Send + Sync + 'static, 

Builds an operation that takes one argument.

fn unary_ordered<F>(f: F) -> Operation<R> where
    F: Fn(&ExprContext<'_>, HirScalarExpr, Vec<ColumnOrder>) -> Result<R, PlanError> + Send + Sync + 'static, 

Builds an operation that takes one argument and an order_by.

fn binary<F>(f: F) -> Operation<R> where
    F: Fn(&ExprContext<'_>, HirScalarExpr, HirScalarExpr) -> Result<R, PlanError> + Send + Sync + 'static, 

Builds an operation that takes two arguments.

fn binary_ordered<F>(f: F) -> Operation<R> where
    F: Fn(&ExprContext<'_>, HirScalarExpr, HirScalarExpr, Vec<ColumnOrder>) -> Result<R, PlanError> + Send + Sync + 'static, 

Builds an operation that takes two arguments and an order_by.

fn variadic<F>(f: F) -> Operation<R> where
    F: Fn(&ExprContext<'_>, Vec<HirScalarExpr>) -> Result<R, PlanError> + Send + Sync + 'static, 

Builds an operation that takes any number of arguments.

Trait Implementations

impl From<AggregateFunc> for Operation<(HirScalarExpr, AggregateFunc)>

fn from(a: AggregateFunc) -> Operation<(HirScalarExpr, AggregateFunc)>

Performs the conversion.

impl From<BinaryFunc> for Operation<HirScalarExpr>

fn from(b: BinaryFunc) -> Operation<HirScalarExpr>

Performs the conversion.

impl From<NullaryFunc> for Operation<HirScalarExpr>

fn from(n: NullaryFunc) -> Operation<HirScalarExpr>

Performs the conversion.

impl From<ScalarWindowFunc> for Operation<ScalarWindowFunc>

fn from(a: ScalarWindowFunc) -> Operation<ScalarWindowFunc>

Performs the conversion.

impl From<UnaryFunc> for Operation<HirScalarExpr>

fn from(u: UnaryFunc) -> Operation<HirScalarExpr>

Performs the conversion.

impl From<VariadicFunc> for Operation<HirScalarExpr>

fn from(v: VariadicFunc) -> Operation<HirScalarExpr>

Performs the conversion.