ueshin commented on code in PR #49083:
URL: https://github.com/apache/spark/pull/49083#discussion_r1874205242
##########
python/pyspark/sql/connect/plan.py:
##########
@@ -1028,6 +1028,67 @@ def _repr_html_(self) -> str:
"""
+class LateralJoin(LogicalPlan):
+ def __init__(
+ self,
+ left: Optional[LogicalPlan],
+ right: LogicalPlan,
+ on: Optional[Column],
+ how: Optional[str],
+ ) -> None:
+ super().__init__(left)
+ self.left = cast(LogicalPlan, left)
+ self.right = right
+ self.on = on
+ if how is None:
+ join_type = proto.Join.JoinType.JOIN_TYPE_INNER
+ elif how == "inner":
+ join_type = proto.Join.JoinType.JOIN_TYPE_INNER
+ elif how in ["leftouter", "left"]:
+ join_type = proto.Join.JoinType.JOIN_TYPE_LEFT_OUTER
+ elif how == "cross":
+ join_type = proto.Join.JoinType.JOIN_TYPE_CROSS
+ else:
+ raise AnalysisException(
+ errorClass="UNSUPPORTED_JOIN_TYPE",
+ messageParameters={"join_type": how},
+ )
+ self.how = join_type
+
+ def plan(self, session: "SparkConnectClient") -> proto.Relation:
+ plan = self._create_proto_relation()
+ plan.lateral_join.left.CopyFrom(self.left.plan(session))
+ plan.lateral_join.right.CopyFrom(self.right.plan(session))
+ if self.on is not None:
+ plan.lateral_join.join_condition.CopyFrom(self.on.to_plan(session))
+ plan.lateral_join.join_type = self.how
+ return plan
+
+ @property
+ def observations(self) -> Dict[str, "Observation"]:
+ return dict(**super().observations, **self.right.observations)
+
+ def print(self, indent: int = 0) -> str:
+ i = " " * indent
+ o = " " * (indent + LogicalPlan.INDENT)
+ n = indent + LogicalPlan.INDENT * 2
+ return (
+ f"{i}<LateralJoin on={self.on} how={self.how}>\n{o}"
+ f"left=\n{self.left.print(n)}\n{o}right=\n{self.right.print(n)}"
+ )
+
+ def _repr_html_(self) -> str:
Review Comment:
It's called from Jupyter notebook.
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