Hyukjin Kwon created SPARK-61180:
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Summary: Add DataFrame._joinAsOf, the as-of join of
pandas-on-Spark's merge_asof, in the Rust and Python clients as PySpark does
Key: SPARK-61180
URL: https://issues.apache.org/jira/browse/SPARK-61180
Project: Spark
Issue Type: Bug
Components: Connect
Affects Versions: connect-rust-4.3.0
Reporter: Hyukjin Kwon
PySpark Connect's DataFrame has _joinAsOf(other, leftAsOfColumn,
rightAsOfColumn, on=None, how=None, *, tolerance=None, allowExactMatches=True,
direction="backward"), which builds the AsOfJoin relation of Spark Connect.
pandas-on-Spark's merge_asof calls it.
The client's DataFrame has none: the name resolves to a column through
__getattr__, so ps.merge_asof(left, right, on="t") raises
TypeError: 'pyspark.sql.connect.column.Column' object is not callable
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