Struct diesel::sql_types::CChar

pub struct CChar;

Available on crate feature postgres_backend only.

The "char" SQL type. This is a PostgreSQL specific type. Used for e.g. setweight. Do not use in user tables.

ToSql impls

• u8

FromSql impls

• u8

Trait Implementations

impl<'expr2, 'expr> AsExpression<CChar> for &'expr2 &'expr u8

type Expression = Bound<CChar, &'expr2 &'expr u8>

The expression being returned

fn as_expression(self) -> Self::Expression

Perform the conversion

impl<'expr> AsExpression<CChar> for &'expr u8

type Expression = Bound<CChar, &'expr u8>

The expression being returned

fn as_expression(self) -> Self::Expression

Perform the conversion

impl AsExpression<CChar> for u8

type Expression = Bound<CChar, u8>

The expression being returned

fn as_expression(self) -> Self::Expression

Perform the conversion

impl Clone for CChar

fn clone(&self) -> CChar

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for CChar

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

Formats the value using the given formatter.

impl Default for CChar

fn default() -> CChar

Returns the “default value” for a type.

impl FromSql<CChar, Pg> for u8

fn from_sql(bytes: PgValue<'_>) -> Result<Self>

See the trait documentation.

fn from_nullable_sql(bytes: Option<DB::RawValue<'_>>) -> Result<Self>

A specialized variant of from_sql for handling null values.

impl HasSqlType<CChar> for Pg

fn metadata(_: &mut Self::MetadataLookup) -> PgTypeMetadata

Fetch the metadata for the given type

impl QueryId for CChar

type QueryId = CChar

A type which uniquely represents Self in a SQL query.

const HAS_STATIC_QUERY_ID: bool = true

Can the SQL generated by Self be uniquely identified by its type?

fn query_id() -> Option<TypeId>

Returns the type id of Self::QueryId if Self::HAS_STATIC_QUERY_ID. Returns None otherwise.

impl SqlType for CChar

type IsNull = NotNull

Is this type nullable?

impl ToSql<CChar, Pg> for u8

fn to_sql<'b>(&'b self, out: &mut Output<'b, '_, Pg>) -> Result

See the trait documentation.

impl Copy for CChar

impl SingleValue for CChar