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SubqueryHost

radixdb_executor::subquery

Trait SubqueryHost 

Source 
pub trait SubqueryHost: Sync {
    // Required methods
    fn subquery_engine(&self) -> &Arc<MVCCEngine> ⓘ;
    fn subquery_open_table(&self, table_name: &str) -> Result<QueryTableHandle>;
    fn subquery_execute_select(
        &self,
        statement: &SelectStatement,
        context: &ExecutionContext,
    ) -> Result<Box<dyn QueryResult>>;
}
Expand description

Narrow composition contract for recursive SELECT execution. Query-local caches remain owned by ExecutionContext; the host provides only the engine and the surrounding SELECT entrypoint.

Required Methods§

Source

fn subquery_engine(&self) -> &Arc<MVCCEngine> ⓘ

Source

fn subquery_open_table(&self, table_name: &str) -> Result<QueryTableHandle>

Source

fn subquery_execute_select( &self, statement: &SelectStatement, context: &ExecutionContext, ) -> Result<Box<dyn QueryResult>>

Dyn Compatibility§

This trait is dyn compatible.

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

Implementors§