Struct datafusion_execution::TaskContext

pub struct TaskContext { /* private fields */ }

Task Execution Context

A TaskContext has represents the state available during a single query’s execution.

Task Context

Implementations

impl TaskContext

pub fn new( task_id: Option<String>, session_id: String, session_config: SessionConfig, scalar_functions: HashMap<String, Arc<ScalarUDF>>, aggregate_functions: HashMap<String, Arc<AggregateUDF>>, window_functions: HashMap<String, Arc<WindowUDF>>, runtime: Arc<RuntimeEnv> ) -> Self

Create a new TaskContext instance.

Most users will use SessionContext::task_ctx to create TaskContexts

pub fn try_new( task_id: String, session_id: String, task_props: HashMap<String, String>, scalar_functions: HashMap<String, Arc<ScalarUDF>>, aggregate_functions: HashMap<String, Arc<AggregateUDF>>, runtime: Arc<RuntimeEnv>, extensions: Extensions ) -> Result<Self>

👎Deprecated since 21.0.0: Construct SessionConfig and call TaskContext::new() instead

Create a new task context instance, by first copying all name/value pairs from task_props into a SessionConfig.

pub fn session_config(&self) -> &SessionConfig

Return the SessionConfig associated with this TaskContext

pub fn session_id(&self) -> String

Return the session_id of this TaskContext

pub fn task_id(&self) -> Option<String>

Return the task_id of this TaskContext

pub fn memory_pool(&self) -> &Arc<dyn MemoryPool>

Return the MemoryPool associated with this TaskContext

pub fn runtime_env(&self) -> Arc<RuntimeEnv>

Return the RuntimeEnv associated with this TaskContext

Trait Implementations

impl FunctionRegistry for TaskContext

fn udfs(&self) -> HashSet<String>

Set of all available udfs.

fn udf(&self, name: &str) -> Result<Arc<ScalarUDF>>

Returns a reference to the udf named name.

fn udaf(&self, name: &str) -> Result<Arc<AggregateUDF>>

Returns a reference to the udaf named name.

fn udwf(&self, name: &str) -> Result<Arc<WindowUDF>>

Returns a reference to the udwf named name.