Struct postgres_parser::sys::FieldSelect

#[repr(C)]pub struct FieldSelect {
    pub xpr: Expr,
    pub arg: *mut Expr,
    pub fieldnum: AttrNumber,
    pub resulttype: Oid,
    pub resulttypmod: int32,
    pub resultcollid: Oid,
}

FieldSelect

FieldSelect represents the operation of extracting one field from a tuple value. At runtime, the input expression is expected to yield a rowtype Datum. The specified field number is extracted and returned as a Datum.

Fields

xpr: Expr

arg: *mut Expr

fieldnum: AttrNumber

input expression

resulttype: Oid

attribute number of field to extract

resulttypmod: int32

type of the field (result type of this node)

resultcollid: Oid

output typmod (usually 1)

Trait Implementations

impl Debug for FieldSelect

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

Formats the value using the given formatter.

impl Default for FieldSelect

fn default() -> Self

Returns the "default value" for a type.

impl Eq for FieldSelect

impl Hash for FieldSelect

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<FieldSelect> for FieldSelect

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

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

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

This method tests for !=.

impl StructuralEq for FieldSelect

impl StructuralPartialEq for FieldSelect