- TableExpr.asof_join(right, predicates=(), by=(), tolerance=None)¶
Perform an asof join between two tables. Similar to a left join except that the match is done on nearest key rather than equal keys.
Optionally, match keys with ‘by’ before joining with predicates.
left (TableExpr) –
right (TableExpr) –
predicates (join expression(s)) –
by (string) – column to group by before joining
tolerance (interval) – Amount of time to look behind when joining
joined – Note that the schema is not materialized yet
- Return type