Struct CastStringToMap 

pub struct CastStringToMap<E = MirScalarExpr> {
    pub return_ty: SqlScalarType,
    pub cast_expr: Box<E>,
}

Fields

return_ty: SqlScalarType

cast_expr: Box<E>

Implementations

impl<E> CastStringToMap<E>

pub fn try_map_expr<'a, E2: TryFrom<&'a E>>( &'a self, ) -> Result<CastStringToMap<E2>, E2::Error>

Rebuilds this function with the element cast expression converted to E2.

pub fn map_expr<'a, E2: From<&'a E>>(&'a self) -> CastStringToMap<E2>

Rebuilds this function with the element cast expression converted to E2.

Trait Implementations

impl<E: Clone> Clone for CastStringToMap<E>

fn clone(&self) -> CastStringToMap<E>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<E: Debug> Debug for CastStringToMap<E>

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

Formats the value using the given formatter.

impl<'de, E> Deserialize<'de> for CastStringToMap<E>

where E: Deserialize<'de>,

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<E> Display for CastStringToMap<E>

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

Formats the value using the given formatter.

impl<E: Eq> Eq for CastStringToMap<E>

impl<E> From<CastStringToMap<E>> for UnaryFunc<E>

fn from(variant: CastStringToMap<E>) -> Self

Converts to this type from the input type.

impl<E> FuncName for CastStringToMap<E>

const NAME: &'static str = "cast_string_to_map"

impl<E: Hash> Hash for CastStringToMap<E>

fn hash<__H: Hasher>(&self, state: &mut __H)

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<E: Eval> LazyUnaryFunc for CastStringToMap<E>

fn output_sql_type(&self, input_type: SqlColumnType) -> SqlColumnType

The output SqlColumnType of this function

fn propagates_nulls(&self) -> bool

Whether this function will produce NULL on NULL input

fn introduces_nulls(&self) -> bool

Whether this function will produce NULL on non-NULL input

fn preserves_uniqueness(&self) -> bool

Whether this function preserves uniqueness

fn eval<'a>( &'a self, datums: &[Datum<'a>], temp_storage: &'a RowArena, a: &'a impl Eval, ) -> Result<Datum<'a>, EvalError>

fn inverse(&self) -> Option<UnaryFunc>

The inverse of this function, if it has one and we have determined it.

fn is_monotone(&self) -> bool

Returns true if the function is monotone. (Non-strict; either increasing or decreasing.) Monotone functions map ranges to ranges: ie. given a range of possible inputs, we can determine the range of possible outputs just by mapping the endpoints.

fn is_eliminable_cast(&self) -> bool

Returns true if the function does no actual work, but is merely a type-tracking cast.

fn output_type(&self, input_type: ReprColumnType) -> ReprColumnType

fn could_error(&self) -> bool

Whether this function might error on non-error input.

impl<E: Ord> Ord for CastStringToMap<E>

fn cmp(&self, other: &CastStringToMap<E>) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl<E: PartialEq> PartialEq for CastStringToMap<E>

fn eq(&self, other: &CastStringToMap<E>) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl<E: PartialOrd> PartialOrd for CastStringToMap<E>

fn partial_cmp(&self, other: &CastStringToMap<E>) -> 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<E> Serialize for CastStringToMap<E>

where E: Serialize,

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl<E: PartialEq> StructuralPartialEq for CastStringToMap<E>