Struct ViewInstanceTableFunction 

pub struct ViewInstanceTableFunction { /* private fields */ }

ViewInstanceTableFunction gives access to any view instance using a ViewFactory.

# Python code showing the usage of `view_instance(view_set_name, view_instance_id)`
sql = """
SELECT *
FROM view_instance('thread_spans', '{stream_id}')
;""".format(stream_id=stream_id)
df_spans = client.query(sql, begin_spans, end_spans)

The only site that supplies an AudienceGuard to the MaterializedViews it builds: every caller-named instance goes through this table function, so this is where the scan-time audience check gets wired in.

Implementations

impl ViewInstanceTableFunction

pub fn new( lakehouse: Arc<LakehouseContext>, view_factory: Arc<ViewFactory>, part_provider: Arc<dyn QueryPartitionProvider>, query_range: Option<TimeRange>, guard: Arc<AudienceGuard>, ) -> ViewInstanceTableFunction

Trait Implementations

impl Debug for ViewInstanceTableFunction

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

Formats the value using the given formatter.

impl TableFunctionImpl for ViewInstanceTableFunction

fn call_with_args( &self, args: TableFunctionArgs<'_, '_>, ) -> Result<Arc<dyn TableProvider>, DataFusionError>

Create a table provider

fn call( &self, _exprs: &[Expr], ) -> Result<Arc<dyn TableProvider>, DataFusionError>

👎Deprecated since 53.0.0:

Implement TableFunctionImpl::call_with_args instead

Create a table provider