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MeshQueryExecutor

net::adapter::net::behavior::meshdb::executor

Trait MeshQueryExecutor 

Source 
pub trait MeshQueryExecutor: Send + Sync {
    // Required method
    fn execute_with<'life0, 'async_trait>(
        &'life0 self,
        plan: ExecutionPlan,
        options: ExecuteOptions,
    ) -> Pin<Box<dyn Future<Output = Result<RunningQuery, MeshError>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;

    // Provided method
    fn execute<'life0, 'async_trait>(
        &'life0 self,
        plan: ExecutionPlan,
    ) -> Pin<Box<dyn Future<Output = Result<RunningQuery, MeshError>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait { ... }
}
Expand description

The user-facing executor surface. Walks an ExecutionPlan and produces rows.

Implementors ship with caching disabled by default; LocalMeshQueryExecutor::with_cache and super::federated::FederatedMeshQueryExecutor::with_cache wire the Phase F LRU. The default execute(plan) is equivalent to execute_with(plan, ExecuteOptions::default()) so existing call sites need no change.

Required Methods§

Source

fn execute_with<'life0, 'async_trait>( &'life0 self, plan: ExecutionPlan, options: ExecuteOptions, ) -> Pin<Box<dyn Future<Output = Result<RunningQuery, MeshError>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

Begin execution of plan with explicit options. Cache-aware implementors honour ExecuteOptions::bypass_cache and ExecuteOptions::cache_policy; cache-less ones silently ignore both.

Provided Methods§

Source

fn execute<'life0, 'async_trait>( &'life0 self, plan: ExecutionPlan, ) -> Pin<Box<dyn Future<Output = Result<RunningQuery, MeshError>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

Begin execution of plan with default ExecuteOptions.

Errors before stream construction (e.g. unresolved composite operator) surface synchronously; errors mid- stream surface as Err items in the stream.

Implementors§