Struct FunctionRegistry 

pub struct FunctionRegistry(HashMap<FuncName, Vec<FuncSign>>);

A set of function signatures.

Tuple Fields

0: HashMap<FuncName, Vec<FuncSign>>

Implementations

impl FunctionRegistry

pub fn insert(&mut self, sig: FuncSign)

Inserts a function signature.

pub fn remove(&mut self, sig: FuncSign) -> Option<FuncSign>

Remove a function signature from registry.

pub fn get( &self, name: impl Into<FuncName>, args: &[DataType], ret: &DataType, ) -> Result<&FuncSign, ExprError>

Returns a function signature with the same type, argument types and return type. Deprecated functions are included.

pub fn get_with_arg_nums( &self, name: impl Into<FuncName>, nargs: usize, ) -> Vec<&FuncSign>

Returns all function signatures with the same type and number of arguments. Deprecated functions are excluded.

pub fn get_return_type( &self, name: impl Into<FuncName>, args: &[DataType], ) -> Result<DataType>

Returns the return type for the given function and arguments. Deprecated functions are excluded.

pub fn iter(&self) -> impl Iterator<Item = &FuncSign>

Returns an iterator of all function signatures.

pub fn iter_scalars(&self) -> impl Iterator<Item = &FuncSign>

Returns an iterator of all scalar functions.

pub fn iter_aggregates(&self) -> impl Iterator<Item = &FuncSign>

Returns an iterator of all aggregate functions.

Trait Implementations

impl Clone for FunctionRegistry

fn clone(&self) -> FunctionRegistry

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FunctionRegistry

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

Formats the value using the given formatter.

impl Default for FunctionRegistry

fn default() -> FunctionRegistry

Returns the “default value” for a type.