Enum TypeSignatureClass 

pub enum TypeSignatureClass {
    Any,
    Timestamp,
    Time,
    Interval,
    Duration,
    Native(Arc<dyn LogicalType>),
    Integer,
    Float,
    Decimal,
    Numeric,
    Binary,
}

Represents the class of types that can be used in a function signature.

This is used to specify what types are valid for function arguments in a more flexible way than just listing specific DataTypes. For example, TypeSignatureClass::Timestamp matches any timestamp type regardless of timezone or precision.

Used primarily with TypeSignature::Coercible to define function signatures that can accept arguments that can be coerced to a particular class of types.

Variants

Any

Allows an arbitrary type argument without coercing the argument.

Timestamp

Timestamps, allowing arbitrary (or no) timezones

Time

All time types

Interval

All interval types

Duration

All duration types

Native(Arc<dyn LogicalType>)

A specific native type

Integer

Signed and unsigned integers

Float

All float types

Decimal

All decimal types, allowing arbitrary precision & scale

Numeric

Integers, floats and decimals

Binary

Encompasses both the native Binary/LargeBinary types as well as arbitrarily sized FixedSizeBinary types

Implementations

impl TypeSignatureClass

pub fn matches_native_type(&self, logical_type: &NativeType) -> bool

Does the specified NativeType match this type signature class?

pub fn default_casted_type( &self, native_type: &NativeType, origin_type: &DataType, ) -> Result<DataType, DataFusionError>

What type would origin_type be casted to when casting to the specified native type?

Trait Implementations

impl Clone for TypeSignatureClass

fn clone(&self) -> TypeSignatureClass

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TypeSignatureClass

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

Formats the value using the given formatter.

impl Display for TypeSignatureClass

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

Formats the value using the given formatter.

impl Hash for TypeSignatureClass

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 TypeSignatureClass

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

fn partial_cmp(&self, other: &TypeSignatureClass) -> 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 Eq for TypeSignatureClass

impl StructuralPartialEq for TypeSignatureClass