[][src]Struct diesel::expression::SqlLiteral

#[must_use = "Queries are only executed when calling `load`, `get_result`, or similar."]
pub struct SqlLiteral<ST, T = ()> { /* fields omitted */ }

Returned by the sql() function.

Methods

impl<ST, T> SqlLiteral<ST, T>[src]

pub fn bind<BindST, U>(
    self,
    bind_value: U
) -> UncheckedBind<Self, U::Expression> where
    U: AsExpression<BindST>, 
[src]

Bind a value for use with this SQL query.

Safety

This function should be used with care, as Diesel cannot validate that the value is of the right type nor can it validate that you have passed the correct number of parameters.

Examples

let seans_id = users
    .select(id)
    .filter(sql("name = ").bind::<Text, _>("Sean"))
    .get_result(&connection);
assert_eq!(Ok(1), seans_id);

let tess_id = sql::<Integer>("SELECT id FROM users WHERE name = ")
    .bind::<Text, _>("Tess")
    .get_result(&connection);
assert_eq!(Ok(2), tess_id);

Multiple Bind Params


let query = users
    .select(name)
    .filter(
        sql("id > ")
        .bind::<Integer,_>(1)
        .sql(" AND name <> ")
        .bind::<Text, _>("Ryan")
    )
    .get_results(&connection);
let expected = vec!["Tess".to_string()];
assert_eq!(Ok(expected), query);

pub fn sql(self, sql: &str) -> SqlLiteral<ST, Self>[src]

Use literal SQL in the query builder

This function is intended for use when you need a small bit of raw SQL in your query. If you want to write the entire query using raw SQL, use sql_query instead.

Safety

This function should be used with care, as Diesel cannot validate that the value is of the right type nor can it validate that you have passed the correct number of parameters.

Examples


let query = users
    .select(name)
    .filter(
        sql("id > 1")
        .sql(" AND name <> 'Ryan'")
    )
    .get_results(&connection);
let expected = vec!["Tess".to_string()];
assert_eq!(Ok(expected), query);

Trait Implementations

impl<ST, T, __Rhs> Add<__Rhs> for SqlLiteral<ST, T> where
    Self: Expression,
    Self::SqlType: Add,
    __Rhs: AsExpression<<Self::SqlType as Add>::Rhs>, 
[src]

type Output = Add<Self, __Rhs::Expression>

The resulting type after applying the + operator.

impl<QS, ST, T> AppearsOnTable<QS> for SqlLiteral<ST, T>[src]

impl<ST: Clone, T: Clone> Clone for SqlLiteral<ST, T>[src]

impl<ST: Debug, T: Debug> Debug for SqlLiteral<ST, T>[src]

impl<ST, T, __Rhs> Div<__Rhs> for SqlLiteral<ST, T> where
    Self: Expression,
    Self::SqlType: Div,
    __Rhs: AsExpression<<Self::SqlType as Div>::Rhs>, 
[src]

type Output = Div<Self, __Rhs::Expression>

The resulting type after applying the / operator.

impl<ST, T> Expression for SqlLiteral<ST, T>[src]

type SqlType = ST

The type that this expression represents in SQL

impl<ST, T, __Rhs> Mul<__Rhs> for SqlLiteral<ST, T> where
    Self: Expression,
    Self::SqlType: Mul,
    __Rhs: AsExpression<<Self::SqlType as Mul>::Rhs>, 
[src]

type Output = Mul<Self, __Rhs::Expression>

The resulting type after applying the * operator.

impl<ST, T> Query for SqlLiteral<ST, T>[src]

type SqlType = ST

The SQL type that this query represents. Read more

impl<ST, T, DB> QueryFragment<DB> for SqlLiteral<ST, T> where
    DB: Backend,
    T: QueryFragment<DB>, 
[src]

impl<ST, T> QueryId for SqlLiteral<ST, T>[src]

type QueryId = ()

A type which uniquely represents Self in a SQL query. Read more

impl<ST, T, Conn> RunQueryDsl<Conn> for SqlLiteral<ST, T>[src]

impl<QS, ST, T> SelectableExpression<QS> for SqlLiteral<ST, T>[src]

impl<ST, T, __Rhs> Sub<__Rhs> for SqlLiteral<ST, T> where
    Self: Expression,
    Self::SqlType: Sub,
    __Rhs: AsExpression<<Self::SqlType as Sub>::Rhs>, 
[src]

type Output = Sub<Self, __Rhs::Expression>

The resulting type after applying the - operator.

impl<ST, T, GB> ValidGrouping<GB> for SqlLiteral<ST, T>[src]

type IsAggregate = Never

Is this expression aggregate? Read more

Auto Trait Implementations

impl<ST, T> RefUnwindSafe for SqlLiteral<ST, T> where
    ST: RefUnwindSafe,
    T: RefUnwindSafe

impl<ST, T> Send for SqlLiteral<ST, T> where
    ST: Send,
    T: Send

impl<ST, T> Sync for SqlLiteral<ST, T> where
    ST: Sync,
    T: Sync

impl<ST, T> Unpin for SqlLiteral<ST, T> where
    ST: Unpin,
    T: Unpin

impl<ST, T> UnwindSafe for SqlLiteral<ST, T> where
    ST: UnwindSafe,
    T: UnwindSafe

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized
[src]

impl<T> AsQuery for T where
    T: Query
[src]

type SqlType = <T as Query>::SqlType

The SQL type of Self::Query

type Query = T

What kind of query does this type represent?

impl<T> Borrow<T> for T where
    T: ?Sized
[src]

impl<T> BorrowMut<T> for T where
    T: ?Sized
[src]

impl<Conn, DB, T> ExecuteDsl<Conn, DB> for T where
    Conn: Connection<Backend = DB>,
    DB: Backend,
    T: QueryFragment<DB> + QueryId
[src]

impl<T> From<T> for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, 
[src]

impl<T> IntoSql for T[src]

impl<Conn, T, U> LoadQuery<Conn, U> for T where
    Conn: Connection,
    T: AsQuery + RunQueryDsl<Conn>,
    U: Queryable<<T as AsQuery>::SqlType, <Conn as Connection>::Backend>,
    <Conn as Connection>::Backend: HasSqlType<<T as AsQuery>::SqlType>,
    <T as AsQuery>::Query: QueryFragment<<Conn as Connection>::Backend>,
    <T as AsQuery>::Query: QueryId
[src]

impl<T> NonAggregate for T where
    T: ValidGrouping<()>,
    <T as ValidGrouping<()>>::IsAggregate: MixedAggregates<No>,
    <<T as ValidGrouping<()>>::IsAggregate as MixedAggregates<No>>::Output == No
[src]

impl<T, Conn> RunQueryDsl<Conn> for T where
    T: Table
[src]

impl<T> ToOwned for T where
    T: Clone
[src]

type Owned = T

The resulting type after obtaining ownership.

impl<T, U> TryFrom<U> for T where
    U: Into<T>, 
[src]

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 
[src]

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.