Trait diesel::query_builder::QueryFragment

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pub trait QueryFragment<DB: Backend, SP = NotSpecialized> {
    // Required method
    fn walk_ast<'b>(&'b self, pass: AstPass<'_, 'b, DB>) -> QueryResult<()>;
}

Expand description

An untyped fragment of SQL.

This may be a complete SQL command (such as an update statement without a RETURNING clause), or a subsection (such as our internal types used to represent a WHERE clause). Implementations of ExecuteDsl and LoadQuery will generally require that this trait be implemented.

Required Methods§

source

fn walk_ast<'b>(&'b self, pass: AstPass<'_, 'b, DB>) -> QueryResult<()>

Walk over this QueryFragment for all passes.

This method is where the actual behavior of an AST node is implemented. This method will contain the behavior required for all possible AST passes. See AstPass for more details.

Trait diesel::query_builder::QueryFragmentCopy item path

Required Methods§

fn walk_ast<'b>(&'b self, pass: AstPass<'_, 'b, DB>) -> QueryResult<()>

Trait Implementations§

impl<DB> QueryId for dyn QueryFragment<DB>

type QueryId = ()

const HAS_STATIC_QUERY_ID: bool = false

fn query_id() -> Option<TypeId>

Implementations on Foreign Types§

impl<'a, T, DB> QueryFragment<DB> for &'a Twhere DB: Backend, T: QueryFragment<DB> + ?Sized,

fn walk_ast<'b>(&'b self, pass: AstPass<'_, 'b, DB>) -> QueryResult<()>

impl<DB: Backend> QueryFragment<DB> for ()

fn walk_ast<'b>(&'b self, _: AstPass<'_, 'b, DB>) -> QueryResult<()>

fn walk_ast<'b>(&'b self, out: AstPass<'_, 'b, __DB>) -> QueryResult<()>

fn walk_ast<'b>(&'b self, out: AstPass<'_, 'b, __DB>) -> QueryResult<()>

fn walk_ast<'b>(&'b self, out: AstPass<'_, 'b, __DB>) -> QueryResult<()>

fn walk_ast<'b>(&'b self, out: AstPass<'_, 'b, __DB>) -> QueryResult<()>

fn walk_ast<'b>(&'b self, out: AstPass<'_, 'b, __DB>) -> QueryResult<()>

fn walk_ast<'b>(&'b self, out: AstPass<'_, 'b, __DB>) -> QueryResult<()>

fn walk_ast<'b>(&'b self, out: AstPass<'_, 'b, __DB>) -> QueryResult<()>

fn walk_ast<'b>(&'b self, out: AstPass<'_, 'b, __DB>) -> QueryResult<()>

fn walk_ast<'b>(&'b self, out: AstPass<'_, 'b, __DB>) -> QueryResult<()>

fn walk_ast<'b>(&'b self, out: AstPass<'_, 'b, __DB>) -> QueryResult<()>

fn walk_ast<'b>(&'b self, out: AstPass<'_, 'b, __DB>) -> QueryResult<()>

fn walk_ast<'b>(&'b self, out: AstPass<'_, 'b, __DB>) -> QueryResult<()>

fn walk_ast<'b>(&'b self, out: AstPass<'_, 'b, __DB>) -> QueryResult<()>

fn walk_ast<'b>(&'b self, out: AstPass<'_, 'b, __DB>) -> QueryResult<()>

fn walk_ast<'b>(&'b self, out: AstPass<'_, 'b, __DB>) -> QueryResult<()>

fn walk_ast<'b>(&'b self, out: AstPass<'_, 'b, __DB>) -> QueryResult<()>

fn walk_ast<'b>(&'b self, out: AstPass<'_, 'b, __DB>) -> QueryResult<()>

fn walk_ast<'b>(&'b self, out: AstPass<'_, 'b, __DB>) -> QueryResult<()>

fn walk_ast<'b>(&'b self, out: AstPass<'_, 'b, __DB>) -> QueryResult<()>

fn walk_ast<'b>(&'b self, out: AstPass<'_, 'b, __DB>) -> QueryResult<()>

fn walk_ast<'b>(&'b self, out: AstPass<'_, 'b, __DB>) -> QueryResult<()>

fn walk_ast<'b>(&'b self, out: AstPass<'_, 'b, __DB>) -> QueryResult<()>

fn walk_ast<'b>(&'b self, out: AstPass<'_, 'b, __DB>) -> QueryResult<()>

fn walk_ast<'b>(&'b self, out: AstPass<'_, 'b, __DB>) -> QueryResult<()>

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

fn walk_ast<'b>(&'b self, out: AstPass<'_, 'b, __DB>) -> QueryResult<()>

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

fn walk_ast<'b>(&'b self, out: AstPass<'_, 'b, __DB>) -> QueryResult<()>

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

fn walk_ast<'b>(&'b self, out: AstPass<'_, 'b, __DB>) -> QueryResult<()>

impl<T0: QueryFragment<__DB>, T1: QueryFragment<__DB>, T2: QueryFragment<__DB>, T3: QueryFragment<__DB>, T4: QueryFragment<__DB>, __DB: Backend> QueryFragment<__DB> for (T0, T1, T2, T3, T4)

fn walk_ast<'b>(&'b self, out: AstPass<'_, 'b, __DB>) -> QueryResult<()>

impl<T0: QueryFragment<__DB>, T1: QueryFragment<__DB>, T2: QueryFragment<__DB>, T3: QueryFragment<__DB>, __DB: Backend> QueryFragment<__DB> for (T0, T1, T2, T3)

fn walk_ast<'b>(&'b self, out: AstPass<'_, 'b, __DB>) -> QueryResult<()>

impl<T0: QueryFragment<__DB>, T1: QueryFragment<__DB>, T2: QueryFragment<__DB>, __DB: Backend> QueryFragment<__DB> for (T0, T1, T2)

fn walk_ast<'b>(&'b self, out: AstPass<'_, 'b, __DB>) -> QueryResult<()>

impl<T0: QueryFragment<__DB>, T1: QueryFragment<__DB>, __DB: Backend> QueryFragment<__DB> for (T0, T1)

fn walk_ast<'b>(&'b self, out: AstPass<'_, 'b, __DB>) -> QueryResult<()>

impl<T0: QueryFragment<__DB>, __DB: Backend> QueryFragment<__DB> for (T0,)

fn walk_ast<'b>(&'b self, out: AstPass<'_, 'b, __DB>) -> QueryResult<()>

impl<T, DB> QueryFragment<DB> for Option<T>where DB: Backend, T: QueryFragment<DB>,

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

impl<T, DB> QueryFragment<DB> for Box<T>where DB: Backend, T: QueryFragment<DB> + ?Sized,

fn walk_ast<'b>(&'b self, pass: AstPass<'_, 'b, DB>) -> QueryResult<()>

Implementors§

impl<DB, Inner> QueryFragment<DB> for SqlQuery<Inner>where DB: Backend + DieselReserveSpecialization, Inner: QueryFragment<DB>,

impl<DB, Query> QueryFragment<DB> for BoxedSqlQuery<'_, DB, Query>where DB: Backend + DieselReserveSpecialization, Query: QueryFragment<DB>,

impl<DB, T> QueryFragment<DB> for CollectedQuery<T>where DB: Backend + DieselReserveSpecialization, for<'a> <DB as Backend>::BindCollector<'a>: MoveableBindCollector<DB, BindData = T>,

impl<DB: Backend> QueryFragment<DB> for now

impl<DB: Backend> QueryFragment<DB> for today

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

impl<S, C, DB> QueryFragment<DB> for AliasedField<S, C>where S: AliasSource, DB: Backend, C: Column<Table = S::Target>,

impl<S, DB> QueryFragment<DB> for Alias<S>where S: AliasSource, DB: Backend, Self: QueryFragment<DB, DB::AliasSyntax>,

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

impl<T, U, Op, Ret, DB> QueryFragment<DB> for InsertStatement<T, U, Op, Ret>where DB: Backend + DieselReserveSpecialization, T: Table, T::FromClause: QueryFragment<DB>, U: QueryFragment<DB> + CanInsertInSingleQuery<DB>, Op: QueryFragment<DB>, Ret: QueryFragment<DB>,

impl<T, U, Ret, DB> QueryFragment<DB> for DeleteStatement<T, U, Ret>where DB: Backend + DieselReserveSpecialization, T: Table, FromClause<T>: QueryFragment<DB>, U: QueryFragment<DB>, Ret: QueryFragment<DB>,

impl<T, U, V, Ret, DB> QueryFragment<DB> for UpdateStatement<T, U, V, Ret>where DB: Backend + DieselReserveSpecialization, T: Table, T::FromClause: QueryFragment<DB>, U: QueryFragment<DB>, V: QueryFragment<DB>, Ret: QueryFragment<DB>,

impl<Whens, E, DB> QueryFragment<DB> for CaseWhen<Whens, E>where DB: Backend, Whens: QueryFragment<DB>, E: QueryFragment<DB>,

Trait diesel::query_builder::QueryFragment

impl<'a, T, DB> QueryFragment<DB> for &'a T
where DB: Backend, T: QueryFragment<DB> + ?Sized,

impl<T0: QueryFragment<DB>, T1: QueryFragment<DB>, T2: QueryFragment<DB>, T3: QueryFragment<DB>, T4: QueryFragment<DB>, T5: QueryFragment<DB>, T6: QueryFragment<DB>, T7: QueryFragment<DB>, DB: Backend> QueryFragment<DB> for (T0, T1, T2, T3, T4, T5, T6, T7)

impl<T0: QueryFragment<DB>, T1: QueryFragment<DB>, T2: QueryFragment<DB>, T3: QueryFragment<DB>, T4: QueryFragment<DB>, T5: QueryFragment<DB>, T6: QueryFragment<DB>, DB: Backend> QueryFragment<__DB> for (T0, T1, T2, T3, T4, T5, T6)

impl<T0: QueryFragment<DB>, T1: QueryFragment<DB>, T2: QueryFragment<DB>, T3: QueryFragment<DB>, T4: QueryFragment<DB>, T5: QueryFragment<DB>, DB: Backend> QueryFragment<DB> for (T0, T1, T2, T3, T4, T5)

impl<T0: QueryFragment<DB>, T1: QueryFragment<DB>, T2: QueryFragment<DB>, T3: QueryFragment<DB>, T4: QueryFragment<DB>, DB: Backend> QueryFragment<__DB> for (T0, T1, T2, T3, T4)

impl<T0: QueryFragment<DB>, T1: QueryFragment<DB>, T2: QueryFragment<DB>, T3: QueryFragment<DB>, DB: Backend> QueryFragment<DB> for (T0, T1, T2, T3)

impl<T0: QueryFragment<DB>, T1: QueryFragment<DB>, T2: QueryFragment<DB>, DB: Backend> QueryFragment<__DB> for (T0, T1, T2)

impl<T0: QueryFragment<DB>, T1: QueryFragment<DB>, DB: Backend> QueryFragment<DB> for (T0, T1)

impl<T0: QueryFragment<DB>, DB: Backend> QueryFragment<__DB> for (T0,)

impl<T, DB> QueryFragment<DB> for Option<T>
where DB: Backend, T: QueryFragment<DB>,

impl<T, DB> QueryFragment<DB> for Box<T>
where DB: Backend, T: QueryFragment<DB> + ?Sized,

impl<DB, Inner> QueryFragment<DB> for SqlQuery<Inner>
where DB: Backend + DieselReserveSpecialization, Inner: QueryFragment<DB>,

impl<DB, Query> QueryFragment<DB> for BoxedSqlQuery<'_, DB, Query>
where DB: Backend + DieselReserveSpecialization, Query: QueryFragment<DB>,

impl<DB, T> QueryFragment<DB> for CollectedQuery<T>
where DB: Backend + DieselReserveSpecialization, for<'a> <DB as Backend>::BindCollector<'a>: MoveableBindCollector<DB, BindData = T>,

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

impl<S, C, DB> QueryFragment<DB> for AliasedField<S, C>
where S: AliasSource, DB: Backend, C: Column<Table = S::Target>,

impl<S, DB> QueryFragment<DB> for Alias<S>
where S: AliasSource, DB: Backend, Self: QueryFragment<DB, DB::AliasSyntax>,

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

impl<T, U, Op, Ret, DB> QueryFragment<DB> for InsertStatement<T, U, Op, Ret>
where DB: Backend + DieselReserveSpecialization, T: Table, T::FromClause: QueryFragment<DB>, U: QueryFragment<DB> + CanInsertInSingleQuery<DB>, Op: QueryFragment<DB>, Ret: QueryFragment<DB>,

impl<T, U, Ret, DB> QueryFragment<DB> for DeleteStatement<T, U, Ret>
where DB: Backend + DieselReserveSpecialization, T: Table, FromClause<T>: QueryFragment<DB>, U: QueryFragment<DB>, Ret: QueryFragment<DB>,

impl<T, U, V, Ret, DB> QueryFragment<DB> for UpdateStatement<T, U, V, Ret>
where DB: Backend + DieselReserveSpecialization, T: Table, T::FromClause: QueryFragment<DB>, U: QueryFragment<DB>, V: QueryFragment<DB>, Ret: QueryFragment<DB>,

impl<Whens, E, DB> QueryFragment<DB> for CaseWhen<Whens, E>
where DB: Backend, Whens: QueryFragment<DB>, E: QueryFragment<DB>,