Struct diesel::sql_types::Double

pub struct Double;

The double precision float SQL type.

ToSql impls

• f64

FromSql impls

• f64

Trait Implementations

impl Add for Double

type Rhs = Double

The SQL type which can be added to this one

type Output = Double

The SQL type of the result of adding Rhs to Self

impl<'expr2, 'expr> AsExpression<Double> for &'expr2 &'expr f64

type Expression = Bound<Double, &'expr2 &'expr f64>

The expression being returned

fn as_expression(self) -> Self::Expression

Perform the conversion

impl<'expr> AsExpression<Double> for &'expr f64

type Expression = Bound<Double, &'expr f64>

The expression being returned

fn as_expression(self) -> Self::Expression

Perform the conversion

impl AsExpression<Double> for f64

type Expression = Bound<Double, f64>

The expression being returned

fn as_expression(self) -> Self::Expression

Perform the conversion

impl Clone for Double

fn clone(&self) -> Double

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Double

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

Formats the value using the given formatter.

impl Default for Double

fn default() -> Double

Returns the “default value” for a type.

impl Div for Double

type Rhs = Double

The SQL type which this one can be divided by

type Output = Double

The SQL type of the result of dividing Self by Rhs

impl Foldable for Double

type Sum = Nullable<Double>

The SQL type of sum(this_type)

type Avg = Nullable<Double>

The SQL type of avg(this_type)

impl FromSql<Double, Mysql> for f64

Available on crate feature mysql_backend only.

fn from_sql(value: 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<Double, Pg> for f64

Available on crate feature postgres_backend only.

fn from_sql(value: 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<Double, Sqlite> for f64

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<Double> for Mysql

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

Fetch the metadata for the given type

impl HasSqlType<Double> for Pg

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

Fetch the metadata for the given type

impl HasSqlType<Double> for Sqlite

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

Fetch the metadata for the given type

impl Mul for Double

type Rhs = Double

The SQL type which this can be multiplied by

type Output = Double

The SQL type of the result of multiplying Self by Rhs

impl QueryId for Double

type QueryId = Double

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 Double

type IsNull = NotNull

Is this type nullable?

impl Sub for Double

type Rhs = Double

The SQL type which can be subtracted from this one

type Output = Double

The SQL type of the result of subtracting Rhs from Self

impl ToSql<Double, Mysql> for f64

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<Double, Pg> for f64

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<Double, Sqlite> for f64

Available on crate feature sqlite only.

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

See the trait documentation.

impl Copy for Double

impl SingleValue for Double

impl SqlOrd for Double