Struct diesel::expression::UncheckedBind

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#[must_use = "Queries are only executed when calling `load`, `get_result`, or similar."]
pub struct UncheckedBind<Query, Value> { /* fields omitted */ }

[−] Expand description

Returned by the [SqlLiteral::bind()] method when binding a value to a fragment of SQL.

Methods

impl<Query, Value> UncheckedBind<Query, Value> where     Query: Expression,

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pub fn sql(self, sql: &str) -> SqlLiteral<Query::SqlType, Self>

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

Trait Implementations

impl<Query: QueryId, Value: QueryId> QueryId for UncheckedBind<Query, Value>

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type QueryId = UncheckedBind<<Query as QueryId>::QueryId, <Value as QueryId>::QueryId>

A type which uniquely represents Self in a SQL query.

const HAS_STATIC_QUERY_ID: bool

HAS_STATIC_QUERY_ID: bool = <Query as QueryId>::HAS_STATIC_QUERY_ID &&
    <Value as QueryId>::HAS_STATIC_QUERY_ID && true

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

fn query_id() -> Option<TypeId>

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

impl<Query: Debug, Value: Debug> Debug for UncheckedBind<Query, Value>

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

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Formats the value using the given formatter.

impl<Query: Clone, Value: Clone> Clone for UncheckedBind<Query, Value>

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fn clone(&self) -> UncheckedBind<Query, Value>

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Returns a copy of the value.

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

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Performs copy-assignment from source.

impl<Query: Copy, Value: Copy> Copy for UncheckedBind<Query, Value>

impl<Query, Value> Expression for UncheckedBind<Query, Value> where     Query: Expression,

type SqlType = Query::SqlType

The type that this expression represents in SQL

impl<Query, Value, DB> QueryFragment<DB> for UncheckedBind<Query, Value> where     DB: Backend,     Query: QueryFragment<DB>,     Value: QueryFragment<DB>,

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fn walk_ast(&self, out: AstPass<DB>) -> QueryResult<()>

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Walk over this QueryFragment for all passes.

fn to_sql(&self, out: &mut DB::QueryBuilder) -> QueryResult<()>

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Converts this QueryFragment to its SQL representation.

fn collect_binds(     &self,     out: &mut DB::BindCollector,     metadata_lookup: &DB::MetadataLookup ) -> QueryResult<()>

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Serializes all bind parameters in this query.

fn is_safe_to_cache_prepared(&self) -> QueryResult<bool>

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Is this query safe to store in the prepared statement cache?

impl<Q, Value> Query for UncheckedBind<Q, Value> where     Q: Query,

type SqlType = Q::SqlType

The SQL type that this query represents.

impl<Query, Value> NonAggregate for UncheckedBind<Query, Value> where     Self: Expression,

impl<QS, Query, Value> SelectableExpression<QS> for UncheckedBind<Query, Value> where     Self: AppearsOnTable<QS>,

impl<QS, Query, Value> AppearsOnTable<QS> for UncheckedBind<Query, Value> where     Self: Expression,

impl<Query, Value, Conn> RunQueryDsl<Conn> for UncheckedBind<Query, Value>

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fn execute(self, conn: &Conn) -> QueryResult<usize> where     Conn: Connection,     Self: ExecuteDsl<Conn>,

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Executes the given command, returning the number of rows affected.

fn load<U>(self, conn: &Conn) -> QueryResult<Vec<U>> where     Self: LoadQuery<Conn, U>,

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Executes the given query, returning a Vec with the returned rows.

fn get_result<U>(self, conn: &Conn) -> QueryResult<U> where     Self: LoadQuery<Conn, U>,

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Runs the command, and returns the affected row.

fn get_results<U>(self, conn: &Conn) -> QueryResult<Vec<U>> where     Self: LoadQuery<Conn, U>,

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Runs the command, returning an Vec with the affected rows.

fn first<U>(self, conn: &Conn) -> QueryResult<U> where     Self: LimitDsl,     Limit<Self>: LoadQuery<Conn, U>,

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Attempts to load a single record.