Enum SimpleComparisonType

#[repr(i32)]
pub enum SimpleComparisonType {
    Unspecified = 0,
    Eq = 1,
    IsNotDistinctFrom = 2,
    MightEqual = 3,
}

Most joins will use one of the following behaviors. To avoid the complexity of a function lookup we define the common behaviors here

Variants

Unspecified = 0

Eq = 1

Returns true only if both values are equal and not null

IsNotDistinctFrom = 2

Returns true if both values are equal and not null Returns true if both values are null Returns false if one value is null and the other value is not null

This can be expressed as a = b OR (isnull(a) AND isnull(b))

MightEqual = 3

Returns true if both values are equal and not null Returns true if either value is null

This can be expressed as a = b OR isnull(a = b)

Implementations

impl SimpleComparisonType

pub fn is_valid(value: i32) -> bool

Returns true if value is a variant of SimpleComparisonType.

pub fn from_i32(value: i32) -> Option<SimpleComparisonType>

👎Deprecated: Use the TryFrom<i32> implementation instead

Converts an i32 to a SimpleComparisonType, or None if value is not a valid variant.

impl SimpleComparisonType

pub fn as_str_name(&self) -> &'static str

String value of the enum field names used in the ProtoBuf definition.

The values are not transformed in any way and thus are considered stable (if the ProtoBuf definition does not change) and safe for programmatic use.

pub fn from_str_name(value: &str) -> Option<Self>

Creates an enum from field names used in the ProtoBuf definition.

Trait Implementations

impl Clone for SimpleComparisonType

fn clone(&self) -> SimpleComparisonType

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for SimpleComparisonType

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

Formats the value using the given formatter.

impl Default for SimpleComparisonType

fn default() -> SimpleComparisonType

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for SimpleComparisonType

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl From<SimpleComparisonType> for i32

fn from(value: SimpleComparisonType) -> i32

Converts to this type from the input type.

impl Hash for SimpleComparisonType

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 Ord for SimpleComparisonType

fn cmp(&self, other: &SimpleComparisonType) -> 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 PartialEq for SimpleComparisonType

fn eq(&self, other: &SimpleComparisonType) -> 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 PartialOrd for SimpleComparisonType

fn partial_cmp(&self, other: &SimpleComparisonType) -> 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 Serialize for SimpleComparisonType

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl TryFrom<i32> for SimpleComparisonType

type Error = UnknownEnumValue

The type returned in the event of a conversion error.

fn try_from(value: i32) -> Result<SimpleComparisonType, UnknownEnumValue>

Performs the conversion.

impl Copy for SimpleComparisonType

impl Eq for SimpleComparisonType

impl StructuralPartialEq for SimpleComparisonType