Struct LimitOffsetClause

pub struct LimitOffsetClause<Limit, Offset> {
    pub limit_clause: Limit,
    pub offset_clause: Offset,
}

A helper query node that contains both limit and offset clauses

This type is only relevant for implementing custom backends

Fields

limit_clause: Limit

The limit clause

offset_clause: Offset

The offset clause

Trait Implementations

impl<Limit: Clone, Offset: Clone> Clone for LimitOffsetClause<Limit, Offset>

fn clone(&self) -> LimitOffsetClause<Limit, Offset>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<Limit: Debug, Offset: Debug> Debug for LimitOffsetClause<Limit, Offset>

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

Formats the value using the given formatter.

impl<'a, L, O> IntoBoxedClause<'a, Pg> for LimitOffsetClause<L, O>

where L: QueryFragment<Pg> + Send + 'a, O: QueryFragment<Pg> + Send + 'a,

type BoxedClause = BoxedLimitOffsetClause<'a, Pg>

Resulting type

fn into_boxed(self) -> Self::BoxedClause

Convert the given query node in it’s boxed representation

impl<L, O> QueryFragment<Pg> for LimitOffsetClause<L, O>

where L: QueryFragment<Pg>, O: QueryFragment<Pg>,

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

Walk over this QueryFragment for all passes.

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

Converts this QueryFragment to its SQL representation.

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

Serializes all bind parameters in this query.

fn is_safe_to_cache_prepared(&self, backend: &DB) -> QueryResult<bool>

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

fn is_noop(&self, backend: &DB) -> QueryResult<bool>

Does walking this AST have any effect?

impl<Limit: QueryId, Offset: QueryId> QueryId for LimitOffsetClause<Limit, Offset>

const HAS_STATIC_QUERY_ID: bool

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

type QueryId = LimitOffsetClause<<Limit as QueryId>::QueryId, <Offset as QueryId>::QueryId>

A type which uniquely represents Self in a SQL query.

fn query_id() -> Option<TypeId>

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

impl<Limit: Copy, Offset: Copy> Copy for LimitOffsetClause<Limit, Offset>