Struct CustomOperator 

pub struct CustomOperator { /* private fields */ }

Trusted server-side SQL template for a custom operator.

Implementations

impl CustomOperator

pub fn new( name: &'static str, template: &'static str, arity: u8, ) -> Result<CustomOperator, ConfigError>

pub fn exists( name: &'static str, template: &'static str, arity: u8, ) -> Result<CustomOperator, ConfigError>

Declares a trusted correlated EXISTS (SELECT ...) relation filter. The complete SQL fragment is server-owned; all {0} values remain bound parameters and {field} is replaced by the selected outer field.

pub fn not_exists( name: &'static str, template: &'static str, arity: u8, ) -> Result<CustomOperator, ConfigError>

Declares a trusted correlated NOT EXISTS (SELECT ...) relation filter.

pub fn typed( name: &'static str, template: &'static str, arity: u8, field_type: ValueType, input_type: ValueType, ) -> Result<CustomOperator, ConfigError>

A trusted operator with distinct field/result and query input types.

pub const fn types(self) -> Option<(ValueType, ValueType)>

pub const fn name(self) -> &'static str

pub const fn template(self) -> &'static str

pub const fn arity(self) -> u8

pub const fn is_exists(self) -> bool

pub const fn is_not_exists(self) -> bool

Trait Implementations

impl Clone for CustomOperator

fn clone(&self) -> CustomOperator

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CustomOperator

impl Debug for CustomOperator

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

Formats the value using the given formatter.

impl Eq for CustomOperator

impl Hash for CustomOperator

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 CustomOperator

fn eq(&self, other: &CustomOperator) -> bool

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for CustomOperator