Trait diesel::sql_types::HasSqlType

pub trait HasSqlType<ST>: TypeMetadata {
    fn metadata(lookup: &mut Self::MetadataLookup) -> Self::TypeMetadata;
}

Indicates that a SQL type exists for a backend.

This trait can be derived using the SqlType derive

Example

#[derive(diesel::sql_types::SqlType)]
#[diesel(postgres_type(oid = 23, array_oid = 1007))]
#[diesel(sqlite_type(name = "Integer"))]
#[diesel(mysql_type(name = "Long"))]
pub struct Integer;

Required Methods

fn metadata(lookup: &mut Self::MetadataLookup) -> Self::TypeMetadata

Fetch the metadata for the given type

This method may use lookup to do dynamic runtime lookup. Implementors of this method should not do dynamic lookup unless absolutely necessary

Implementors

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30, T31, __DB> HasSqlType<(T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30, T31)> for __DBwhere
    __DB: HasSqlType<T0> + HasSqlType<T1> + HasSqlType<T2> + HasSqlType<T3> + HasSqlType<T4> + HasSqlType<T5> + HasSqlType<T6> + HasSqlType<T7> + HasSqlType<T8> + HasSqlType<T9> + HasSqlType<T10> + HasSqlType<T11> + HasSqlType<T12> + HasSqlType<T13> + HasSqlType<T14> + HasSqlType<T15> + HasSqlType<T16> + HasSqlType<T17> + HasSqlType<T18> + HasSqlType<T19> + HasSqlType<T20> + HasSqlType<T21> + HasSqlType<T22> + HasSqlType<T23> + HasSqlType<T24> + HasSqlType<T25> + HasSqlType<T26> + HasSqlType<T27> + HasSqlType<T28> + HasSqlType<T29> + HasSqlType<T30> + HasSqlType<T31> + Backend,

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30, __DB> HasSqlType<(T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30)> for __DBwhere
    __DB: HasSqlType<T0> + HasSqlType<T1> + HasSqlType<T2> + HasSqlType<T3> + HasSqlType<T4> + HasSqlType<T5> + HasSqlType<T6> + HasSqlType<T7> + HasSqlType<T8> + HasSqlType<T9> + HasSqlType<T10> + HasSqlType<T11> + HasSqlType<T12> + HasSqlType<T13> + HasSqlType<T14> + HasSqlType<T15> + HasSqlType<T16> + HasSqlType<T17> + HasSqlType<T18> + HasSqlType<T19> + HasSqlType<T20> + HasSqlType<T21> + HasSqlType<T22> + HasSqlType<T23> + HasSqlType<T24> + HasSqlType<T25> + HasSqlType<T26> + HasSqlType<T27> + HasSqlType<T28> + HasSqlType<T29> + HasSqlType<T30> + Backend,

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, __DB> HasSqlType<(T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29)> for __DBwhere
    __DB: HasSqlType<T0> + HasSqlType<T1> + HasSqlType<T2> + HasSqlType<T3> + HasSqlType<T4> + HasSqlType<T5> + HasSqlType<T6> + HasSqlType<T7> + HasSqlType<T8> + HasSqlType<T9> + HasSqlType<T10> + HasSqlType<T11> + HasSqlType<T12> + HasSqlType<T13> + HasSqlType<T14> + HasSqlType<T15> + HasSqlType<T16> + HasSqlType<T17> + HasSqlType<T18> + HasSqlType<T19> + HasSqlType<T20> + HasSqlType<T21> + HasSqlType<T22> + HasSqlType<T23> + HasSqlType<T24> + HasSqlType<T25> + HasSqlType<T26> + HasSqlType<T27> + HasSqlType<T28> + HasSqlType<T29> + Backend,

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, __DB> HasSqlType<(T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28)> for __DBwhere
    __DB: HasSqlType<T0> + HasSqlType<T1> + HasSqlType<T2> + HasSqlType<T3> + HasSqlType<T4> + HasSqlType<T5> + HasSqlType<T6> + HasSqlType<T7> + HasSqlType<T8> + HasSqlType<T9> + HasSqlType<T10> + HasSqlType<T11> + HasSqlType<T12> + HasSqlType<T13> + HasSqlType<T14> + HasSqlType<T15> + HasSqlType<T16> + HasSqlType<T17> + HasSqlType<T18> + HasSqlType<T19> + HasSqlType<T20> + HasSqlType<T21> + HasSqlType<T22> + HasSqlType<T23> + HasSqlType<T24> + HasSqlType<T25> + HasSqlType<T26> + HasSqlType<T27> + HasSqlType<T28> + Backend,

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, __DB> HasSqlType<(T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27)> for __DBwhere
    __DB: HasSqlType<T0> + HasSqlType<T1> + HasSqlType<T2> + HasSqlType<T3> + HasSqlType<T4> + HasSqlType<T5> + HasSqlType<T6> + HasSqlType<T7> + HasSqlType<T8> + HasSqlType<T9> + HasSqlType<T10> + HasSqlType<T11> + HasSqlType<T12> + HasSqlType<T13> + HasSqlType<T14> + HasSqlType<T15> + HasSqlType<T16> + HasSqlType<T17> + HasSqlType<T18> + HasSqlType<T19> + HasSqlType<T20> + HasSqlType<T21> + HasSqlType<T22> + HasSqlType<T23> + HasSqlType<T24> + HasSqlType<T25> + HasSqlType<T26> + HasSqlType<T27> + Backend,

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, __DB> HasSqlType<(T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26)> for __DBwhere
    __DB: HasSqlType<T0> + HasSqlType<T1> + HasSqlType<T2> + HasSqlType<T3> + HasSqlType<T4> + HasSqlType<T5> + HasSqlType<T6> + HasSqlType<T7> + HasSqlType<T8> + HasSqlType<T9> + HasSqlType<T10> + HasSqlType<T11> + HasSqlType<T12> + HasSqlType<T13> + HasSqlType<T14> + HasSqlType<T15> + HasSqlType<T16> + HasSqlType<T17> + HasSqlType<T18> + HasSqlType<T19> + HasSqlType<T20> + HasSqlType<T21> + HasSqlType<T22> + HasSqlType<T23> + HasSqlType<T24> + HasSqlType<T25> + HasSqlType<T26> + Backend,

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, __DB> HasSqlType<(T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25)> for __DBwhere
    __DB: HasSqlType<T0> + HasSqlType<T1> + HasSqlType<T2> + HasSqlType<T3> + HasSqlType<T4> + HasSqlType<T5> + HasSqlType<T6> + HasSqlType<T7> + HasSqlType<T8> + HasSqlType<T9> + HasSqlType<T10> + HasSqlType<T11> + HasSqlType<T12> + HasSqlType<T13> + HasSqlType<T14> + HasSqlType<T15> + HasSqlType<T16> + HasSqlType<T17> + HasSqlType<T18> + HasSqlType<T19> + HasSqlType<T20> + HasSqlType<T21> + HasSqlType<T22> + HasSqlType<T23> + HasSqlType<T24> + HasSqlType<T25> + Backend,

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, __DB> HasSqlType<(T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24)> for __DBwhere
    __DB: HasSqlType<T0> + HasSqlType<T1> + HasSqlType<T2> + HasSqlType<T3> + HasSqlType<T4> + HasSqlType<T5> + HasSqlType<T6> + HasSqlType<T7> + HasSqlType<T8> + HasSqlType<T9> + HasSqlType<T10> + HasSqlType<T11> + HasSqlType<T12> + HasSqlType<T13> + HasSqlType<T14> + HasSqlType<T15> + HasSqlType<T16> + HasSqlType<T17> + HasSqlType<T18> + HasSqlType<T19> + HasSqlType<T20> + HasSqlType<T21> + HasSqlType<T22> + HasSqlType<T23> + HasSqlType<T24> + Backend,

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, __DB> HasSqlType<(T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23)> for __DBwhere
    __DB: HasSqlType<T0> + HasSqlType<T1> + HasSqlType<T2> + HasSqlType<T3> + HasSqlType<T4> + HasSqlType<T5> + HasSqlType<T6> + HasSqlType<T7> + HasSqlType<T8> + HasSqlType<T9> + HasSqlType<T10> + HasSqlType<T11> + HasSqlType<T12> + HasSqlType<T13> + HasSqlType<T14> + HasSqlType<T15> + HasSqlType<T16> + HasSqlType<T17> + HasSqlType<T18> + HasSqlType<T19> + HasSqlType<T20> + HasSqlType<T21> + HasSqlType<T22> + HasSqlType<T23> + Backend,

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, __DB> HasSqlType<(T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22)> for __DBwhere
    __DB: HasSqlType<T0> + HasSqlType<T1> + HasSqlType<T2> + HasSqlType<T3> + HasSqlType<T4> + HasSqlType<T5> + HasSqlType<T6> + HasSqlType<T7> + HasSqlType<T8> + HasSqlType<T9> + HasSqlType<T10> + HasSqlType<T11> + HasSqlType<T12> + HasSqlType<T13> + HasSqlType<T14> + HasSqlType<T15> + HasSqlType<T16> + HasSqlType<T17> + HasSqlType<T18> + HasSqlType<T19> + HasSqlType<T20> + HasSqlType<T21> + HasSqlType<T22> + Backend,

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, __DB> HasSqlType<(T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21)> for __DBwhere
    __DB: HasSqlType<T0> + HasSqlType<T1> + HasSqlType<T2> + HasSqlType<T3> + HasSqlType<T4> + HasSqlType<T5> + HasSqlType<T6> + HasSqlType<T7> + HasSqlType<T8> + HasSqlType<T9> + HasSqlType<T10> + HasSqlType<T11> + HasSqlType<T12> + HasSqlType<T13> + HasSqlType<T14> + HasSqlType<T15> + HasSqlType<T16> + HasSqlType<T17> + HasSqlType<T18> + HasSqlType<T19> + HasSqlType<T20> + HasSqlType<T21> + Backend,

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, __DB> HasSqlType<(T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20)> for __DBwhere
    __DB: HasSqlType<T0> + HasSqlType<T1> + HasSqlType<T2> + HasSqlType<T3> + HasSqlType<T4> + HasSqlType<T5> + HasSqlType<T6> + HasSqlType<T7> + HasSqlType<T8> + HasSqlType<T9> + HasSqlType<T10> + HasSqlType<T11> + HasSqlType<T12> + HasSqlType<T13> + HasSqlType<T14> + HasSqlType<T15> + HasSqlType<T16> + HasSqlType<T17> + HasSqlType<T18> + HasSqlType<T19> + HasSqlType<T20> + Backend,

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, __DB> HasSqlType<(T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19)> for __DBwhere
    __DB: HasSqlType<T0> + HasSqlType<T1> + HasSqlType<T2> + HasSqlType<T3> + HasSqlType<T4> + HasSqlType<T5> + HasSqlType<T6> + HasSqlType<T7> + HasSqlType<T8> + HasSqlType<T9> + HasSqlType<T10> + HasSqlType<T11> + HasSqlType<T12> + HasSqlType<T13> + HasSqlType<T14> + HasSqlType<T15> + HasSqlType<T16> + HasSqlType<T17> + HasSqlType<T18> + HasSqlType<T19> + Backend,

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, __DB> HasSqlType<(T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18)> for __DBwhere
    __DB: HasSqlType<T0> + HasSqlType<T1> + HasSqlType<T2> + HasSqlType<T3> + HasSqlType<T4> + HasSqlType<T5> + HasSqlType<T6> + HasSqlType<T7> + HasSqlType<T8> + HasSqlType<T9> + HasSqlType<T10> + HasSqlType<T11> + HasSqlType<T12> + HasSqlType<T13> + HasSqlType<T14> + HasSqlType<T15> + HasSqlType<T16> + HasSqlType<T17> + HasSqlType<T18> + Backend,

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, __DB> HasSqlType<(T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17)> for __DBwhere
    __DB: HasSqlType<T0> + HasSqlType<T1> + HasSqlType<T2> + HasSqlType<T3> + HasSqlType<T4> + HasSqlType<T5> + HasSqlType<T6> + HasSqlType<T7> + HasSqlType<T8> + HasSqlType<T9> + HasSqlType<T10> + HasSqlType<T11> + HasSqlType<T12> + HasSqlType<T13> + HasSqlType<T14> + HasSqlType<T15> + HasSqlType<T16> + HasSqlType<T17> + Backend,

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, __DB> HasSqlType<(T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16)> for __DBwhere
    __DB: HasSqlType<T0> + HasSqlType<T1> + HasSqlType<T2> + HasSqlType<T3> + HasSqlType<T4> + HasSqlType<T5> + HasSqlType<T6> + HasSqlType<T7> + HasSqlType<T8> + HasSqlType<T9> + HasSqlType<T10> + HasSqlType<T11> + HasSqlType<T12> + HasSqlType<T13> + HasSqlType<T14> + HasSqlType<T15> + HasSqlType<T16> + Backend,

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, __DB> HasSqlType<(T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15)> for __DBwhere
    __DB: HasSqlType<T0> + HasSqlType<T1> + HasSqlType<T2> + HasSqlType<T3> + HasSqlType<T4> + HasSqlType<T5> + HasSqlType<T6> + HasSqlType<T7> + HasSqlType<T8> + HasSqlType<T9> + HasSqlType<T10> + HasSqlType<T11> + HasSqlType<T12> + HasSqlType<T13> + HasSqlType<T14> + HasSqlType<T15> + Backend,

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, __DB> HasSqlType<(T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14)> for __DBwhere
    __DB: HasSqlType<T0> + HasSqlType<T1> + HasSqlType<T2> + HasSqlType<T3> + HasSqlType<T4> + HasSqlType<T5> + HasSqlType<T6> + HasSqlType<T7> + HasSqlType<T8> + HasSqlType<T9> + HasSqlType<T10> + HasSqlType<T11> + HasSqlType<T12> + HasSqlType<T13> + HasSqlType<T14> + Backend,

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, __DB> HasSqlType<(T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13)> for __DBwhere
    __DB: HasSqlType<T0> + HasSqlType<T1> + HasSqlType<T2> + HasSqlType<T3> + HasSqlType<T4> + HasSqlType<T5> + HasSqlType<T6> + HasSqlType<T7> + HasSqlType<T8> + HasSqlType<T9> + HasSqlType<T10> + HasSqlType<T11> + HasSqlType<T12> + HasSqlType<T13> + Backend,

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, __DB> HasSqlType<(T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12)> for __DBwhere
    __DB: HasSqlType<T0> + HasSqlType<T1> + HasSqlType<T2> + HasSqlType<T3> + HasSqlType<T4> + HasSqlType<T5> + HasSqlType<T6> + HasSqlType<T7> + HasSqlType<T8> + HasSqlType<T9> + HasSqlType<T10> + HasSqlType<T11> + HasSqlType<T12> + Backend,

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, __DB> HasSqlType<(T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11)> for __DBwhere
    __DB: HasSqlType<T0> + HasSqlType<T1> + HasSqlType<T2> + HasSqlType<T3> + HasSqlType<T4> + HasSqlType<T5> + HasSqlType<T6> + HasSqlType<T7> + HasSqlType<T8> + HasSqlType<T9> + HasSqlType<T10> + HasSqlType<T11> + Backend,

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, __DB> HasSqlType<(T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10)> for __DBwhere
    __DB: HasSqlType<T0> + HasSqlType<T1> + HasSqlType<T2> + HasSqlType<T3> + HasSqlType<T4> + HasSqlType<T5> + HasSqlType<T6> + HasSqlType<T7> + HasSqlType<T8> + HasSqlType<T9> + HasSqlType<T10> + Backend,

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, __DB> HasSqlType<(T0, T1, T2, T3, T4, T5, T6, T7, T8, T9)> for __DBwhere
    __DB: HasSqlType<T0> + HasSqlType<T1> + HasSqlType<T2> + HasSqlType<T3> + HasSqlType<T4> + HasSqlType<T5> + HasSqlType<T6> + HasSqlType<T7> + HasSqlType<T8> + HasSqlType<T9> + Backend,

impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, __DB> HasSqlType<(T0, T1, T2, T3, T4, T5, T6, T7, T8)> for __DBwhere
    __DB: HasSqlType<T0> + HasSqlType<T1> + HasSqlType<T2> + HasSqlType<T3> + HasSqlType<T4> + HasSqlType<T5> + HasSqlType<T6> + HasSqlType<T7> + HasSqlType<T8> + Backend,

impl<T0, T1, T2, T3, T4, T5, T6, T7, __DB> HasSqlType<(T0, T1, T2, T3, T4, T5, T6, T7)> for __DBwhere
    __DB: HasSqlType<T0> + HasSqlType<T1> + HasSqlType<T2> + HasSqlType<T3> + HasSqlType<T4> + HasSqlType<T5> + HasSqlType<T6> + HasSqlType<T7> + Backend,

impl<T0, T1, T2, T3, T4, T5, T6, __DB> HasSqlType<(T0, T1, T2, T3, T4, T5, T6)> for __DBwhere
    __DB: HasSqlType<T0> + HasSqlType<T1> + HasSqlType<T2> + HasSqlType<T3> + HasSqlType<T4> + HasSqlType<T5> + HasSqlType<T6> + Backend,

impl<T0, T1, T2, T3, T4, T5, __DB> HasSqlType<(T0, T1, T2, T3, T4, T5)> for __DBwhere
    __DB: HasSqlType<T0> + HasSqlType<T1> + HasSqlType<T2> + HasSqlType<T3> + HasSqlType<T4> + HasSqlType<T5> + Backend,

impl<T0, T1, T2, T3, T4, __DB> HasSqlType<(T0, T1, T2, T3, T4)> for __DBwhere
    __DB: HasSqlType<T0> + HasSqlType<T1> + HasSqlType<T2> + HasSqlType<T3> + HasSqlType<T4> + Backend,

impl<T0, T1, T2, T3, __DB> HasSqlType<(T0, T1, T2, T3)> for __DBwhere
    __DB: HasSqlType<T0> + HasSqlType<T1> + HasSqlType<T2> + HasSqlType<T3> + Backend,

impl<T0, T1, T2, __DB> HasSqlType<(T0, T1, T2)> for __DBwhere
    __DB: HasSqlType<T0> + HasSqlType<T1> + HasSqlType<T2> + Backend,

impl<T0, T1, __DB> HasSqlType<(T0, T1)> for __DBwhere
    __DB: HasSqlType<T0> + HasSqlType<T1> + Backend,

impl<T0, __DB> HasSqlType<(T0,)> for __DBwhere
    __DB: HasSqlType<T0> + Backend,

impl<T, DB> HasSqlType<Nullable<T>> for DBwhere
    DB: Backend + HasSqlType<T>,
    T: SqlType,