Trait InstantiationContext 

pub trait InstantiationContext {
    // Required methods
    fn collection_type(&self, id: GlobalId) -> Option<SqlRelationType>;
    fn index(&self, id: GlobalId) -> Option<IndexInfo>;
    fn materialized_view(&self, id: GlobalId) -> Option<MaterializedViewInfo>;
    fn metric_sink(&self, id: GlobalId) -> Option<MetricSinkInfo>;
    fn allocate_transient_id(&self) -> GlobalId;
}

What PinnedDataflow::instantiate needs from its environment: catalog facts about the plan’s imports and exports, looked up by id, and fresh transient ids. Each lookup returns None when no item of that kind exists.

Required Methods

fn collection_type(&self, id: GlobalId) -> Option<SqlRelationType>

The relation type of the storage collection id, as the optimizer imports it.

fn index(&self, id: GlobalId) -> Option<IndexInfo>

The index under id.

fn materialized_view(&self, id: GlobalId) -> Option<MaterializedViewInfo>

The materialized view whose sink is exported under id.

fn metric_sink(&self, id: GlobalId) -> Option<MetricSinkInfo>

The metric sink exported under id.

fn allocate_transient_id(&self) -> GlobalId

A transient id no other dataflow in this process uses.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors