NullIfFunction

sql_cli::sql::functions::comparison

Struct NullIfFunction

pub struct NullIfFunction;

Expand description

NULLIF function - returns NULL if two values are equal

Trait Implementations§

impl SqlFunction for NullIfFunction

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 NullIfFunction

impl RefUnwindSafe for NullIfFunction

impl Send for NullIfFunction

impl Sync for NullIfFunction

impl Unpin for NullIfFunction

impl UnwindSafe for NullIfFunction

Blanket Implementations§

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

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Returns the argument unchanged.

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type Output = 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

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

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impl<V, T> VZip<V> for T
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