Struct datafusion::functions::datetime::date_bin::DateBinFunc

pub struct DateBinFunc { /* private fields */ }

Implementations

impl DateBinFunc

pub fn new() -> DateBinFunc

Trait Implementations

impl Debug for DateBinFunc

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

Formats the value using the given formatter.

impl Default for DateBinFunc

fn default() -> DateBinFunc

Returns the “default value” for a type.

impl ScalarUDFImpl for DateBinFunc

fn as_any(&self) -> &(dyn Any + 'static)

Returns this object as an Any trait object

fn name(&self) -> &str

Returns this function’s name

fn signature(&self) -> &Signature

Returns the function’s Signature for information about what input types are accepted and the function’s Volatility.

fn return_type( &self, arg_types: &[DataType] ) -> Result<DataType, DataFusionError>

What DataType will be returned by this function, given the types of the arguments.

fn invoke( &self, args: &[ColumnarValue] ) -> Result<ColumnarValue, DataFusionError>

Invoke the function on args, returning the appropriate result

fn monotonicity(&self) -> Result<Option<Vec<Option<bool>>>, DataFusionError>

This function specifies monotonicity behaviors for User defined scalar functions.

fn return_type_from_exprs( &self, _args: &[Expr], _schema: &dyn ExprSchema, arg_types: &[DataType] ) -> Result<DataType, DataFusionError>

What DataType will be returned by this function, given the arguments?

fn aliases(&self) -> &[String]

Returns any aliases (alternate names) for this function.

fn simplify( &self, args: Vec<Expr>, _info: &dyn SimplifyInfo ) -> Result<ExprSimplifyResult, DataFusionError>

Optionally apply per-UDF simplification / rewrite rules.