Enum Rel 

pub enum Rel {
    Class,
    Namespace,
    Attribute,
    Type,
    Database,
    Am,
    Attrdef,
    Collation,
    Inherits,
    Policy,
    Publication,
    PublicationNamespace,
    PublicationRel,
    StatisticExt,
}

One relation of the emulated catalogue.

Variants

Class

Namespace

Attribute

Type

Database

Am

The relations below have columns and no rows: a read model has no such object, and a query that joins one is answered with the no rows that is the truth rather than refused.

Attrdef

Collation

Inherits

Policy

Publication

PublicationNamespace

PublicationRel

StatisticExt

Implementations

impl Rel

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

pub fn columns(self) -> &'static [(&'static str, SqlTy, bool)]

The columns, in pg_catalog’s own order and spelling.

An oid-shaped column is SqlTy::Bigint rather than a type of its own: PostgreSQL’s oid is a 32-bit unsigned integer, every comparison psql writes against one is against a decimal literal, and a fifth SQL type would have to be a type OID a driver knows. A "char" column — relkind, relpersistence, attidentity — is SqlTy::Text of one character, which is what it compares as.

pub fn missing(name: &str) -> String

What a client is told when it names a pg_catalog relation that is not here.

By name, and with the list, because the alternative — an empty answer — is a client that believes the program has no functions rather than one that knows this catalogue has no pg_proc.

Trait Implementations

impl Clone for Rel

fn clone(&self) -> Rel

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Rel

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

Formats the value using the given formatter.

impl Ord for Rel

fn cmp(&self, other: &Rel) -> 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 Rel

fn eq(&self, other: &Rel) -> 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 Rel

fn partial_cmp(&self, other: &Rel) -> 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 Copy for Rel

impl Eq for Rel

impl StructuralPartialEq for Rel