Struct RelationalJoinCostContexts 

pub struct RelationalJoinCostContexts { /* private fields */ }

Per-binding row-source costs for one immutable join enumeration.

Bindings, rather than a query-wide storage mode, distinguish mixed sources and self-joins. Missing bindings retain the descriptor-only default. The caller derives each entry from the reader pinned for that relation.

Implementations

impl RelationalJoinCostContexts

pub fn with_relation( self, binding: BindingId, context: RelationalAccessCostContext, ) -> RelationalJoinCostContexts

pub fn for_relation(&self, binding: BindingId) -> RelationalAccessCostContext

Trait Implementations

impl Clone for RelationalJoinCostContexts

fn clone(&self) -> RelationalJoinCostContexts

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RelationalJoinCostContexts

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

Formats the value using the given formatter.

impl Default for RelationalJoinCostContexts

fn default() -> RelationalJoinCostContexts

Returns the “default value” for a type.

impl Eq for RelationalJoinCostContexts

impl PartialEq for RelationalJoinCostContexts

fn eq(&self, other: &RelationalJoinCostContexts) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for RelationalJoinCostContexts