Struct Bool

pub struct Bool;

The boolean SQL type.

On backends without a native boolean type, this is emulated with the smallest supported integer.

ToSql impls

• bool

FromSql impls

• bool

Trait Implementations

impl<'__expr, '__expr2> AsExpression<Bool> for &'__expr2 &'__expr bool

type Expression = Bound<Bool, &'__expr2 &'__expr bool>

The expression being returned

fn as_expression(self) -> Self::Expression

Perform the conversion

impl<'__expr> AsExpression<Bool> for &'__expr bool

type Expression = Bound<Bool, &'__expr bool>

The expression being returned

fn as_expression(self) -> Self::Expression

Perform the conversion

impl AsExpression<Bool> for bool

type Expression = Bound<Bool, bool>

The expression being returned

fn as_expression(self) -> Self::Expression

Perform the conversion

impl Clone for Bool

fn clone(&self) -> Bool

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Bool

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

Formats the value using the given formatter.

impl Default for Bool

fn default() -> Bool

Returns the “default value” for a type.

impl FromSql<Bool, Mysql> for bool

Available on crate feature mysql_backend only.

fn from_sql(bytes: MysqlValue<'_>) -> 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 FromSql<Bool, Pg> for bool

Available on crate feature postgres_backend only.

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 FromSql<Bool, Sqlite> for bool

Available on crate feature sqlite only.

fn from_sql(value: SqliteValue<'_, '_, '_>) -> 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<Bool> for Mysql

fn metadata(_: &mut ()) -> MysqlType

Fetch the metadata for the given type

impl HasSqlType<Bool> for Pg

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

Fetch the metadata for the given type

impl HasSqlType<Bool> for Sqlite

fn metadata(_: &mut ()) -> SqliteType

Fetch the metadata for the given type

impl QueryId for Bool

const HAS_STATIC_QUERY_ID: bool = true

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

type QueryId = Bool

A type which uniquely represents Self in a SQL query.

fn query_id() -> Option<TypeId>

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

impl SqlType for Bool

type IsNull = NotNull

Is this type nullable?

impl ToSql<Bool, Mysql> for bool

Available on crate feature mysql_backend only.

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

See the trait documentation.

impl ToSql<Bool, Pg> for bool

Available on crate feature postgres_backend only.

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

See the trait documentation.

impl ToSql<Bool, Sqlite> for bool

Available on crate feature sqlite only.

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

See the trait documentation.

impl BoolOrNullableBool for Bool

impl Copy for Bool

impl SingleValue for Bool