Enum DataInput 

pub enum DataInput {
    Value(DataValue),
    Key(String),
    Function(String, Function),
    Mod(String, DataValue),
}

One side of a filter expression — a literal value, column key, or function call.

Variants

Value(DataValue)

Key(String)

Function(String, Function)

Mod(String, DataValue)

Implementations

impl DataInput

pub fn as_key(&self) -> Option<&str>

Returns the column name if this is a Key, Function, or Mod variant.

pub fn value(&self) -> DataValue

Returns the contained DataValue, or DataValue::Null for function/mod variants.

pub fn is_function(&self) -> bool

Returns true if this input is a function call (e.g. .len()).

pub fn is_mod(&self) -> bool

Returns true if this input is a modulo operation (e.g. col % 2).

Trait Implementations

impl Clone for DataInput

fn clone(&self) -> DataInput

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DataInput

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

Formats the value using the given formatter.

impl PartialEq for DataInput

fn eq(&self, other: &DataInput) -> 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 TryFrom<&str> for DataInput

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: &str) -> Result<Self, Self::Error>

Performs the conversion.

impl StructuralPartialEq for DataInput