LengthMethod

sql_cli::sql::functions::string_methods

Struct LengthMethod

pub struct LengthMethod;

Expand description

Length method function (returns integer)

Trait Implementations§

impl MethodFunction for LengthMethod

fn handles_method(&self, method_name: &str) -> bool

Check if this method function handles the given method name

fn method_name(&self) -> &'static str

Get the method name this function handles

fn evaluate_method( &self, receiver: &DataValue, args: &[DataValue], ) -> Result<DataValue>

Evaluate as a method (first arg is implicit ‘self’)

impl SqlFunction for LengthMethod

fn signature(&self) -> FunctionSignature

Get the function’s signature and metadata

fn evaluate(&self, args: &[DataValue]) -> Result<DataValue>

Evaluate the function with the given arguments

fn validate_args(&self, args: &[DataValue]) -> Result<()>

Validate arguments before evaluation (default implementation checks count)

Auto Trait Implementations§

impl Freeze for LengthMethod

impl RefUnwindSafe for LengthMethod

impl Send for LengthMethod

impl Sync for LengthMethod

impl Unpin for LengthMethod

impl UnwindSafe for LengthMethod

Blanket Implementations§

impl<T> Any for T
where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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where T: ?Sized,

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Immutably borrows from an owned value. Read more

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Mutably borrows from an owned value. Read more

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fn from(t: T) -> T

Returns the argument unchanged.

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Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

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where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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type Output = T

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where U: Into<T>,

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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

impl<V, T> VZip<V> for T
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impl<T> ErasedDestructor for T
where T: 'static,