Enum postgres_parser::sys::NullTestType

#[repr(u32)]pub enum NullTestType {
    IS_NULL,
    IS_NOT_NULL,
}

NullTest

NullTest represents the operation of testing a value for NULLness. The appropriate test is performed and returned as a boolean Datum.

When argisrow is false, this simply represents a test for the null value.

When argisrow is true, the input expression must yield a rowtype, and the node implements "row IS [NOT] NULL" per the SQL standard. This includes checking individual fields for NULLness when the row datum itself isn't NULL.

NOTE: the combination of a rowtype input and argisrow==false does NOT correspond to the SQL notation "row IS [NOT] NULL"; instead, this case represents the SQL notation "row IS [NOT] DISTINCT FROM NULL".

Variants

IS_NULL

IS_NOT_NULL

Trait Implementations

impl Clone for NullTestType

fn clone(&self) -> NullTestType

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for NullTestType

impl Debug for NullTestType

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for NullTestType

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
    __D: Deserializer<'de>, 

Deserialize this value from the given Serde deserializer.

impl Eq for NullTestType

impl Hash for NullTestType

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, 

Feeds a slice of this type into the given [Hasher].

impl PartialEq<NullTestType> for NullTestType

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

This method tests for self and other values to be equal, and is used by ==.

#[must_use]fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl Serialize for NullTestType

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

Serialize this value into the given Serde serializer.

impl StructuralEq for NullTestType

impl StructuralPartialEq for NullTestType