reswqa commented on code in PR #25729:
URL: https://github.com/apache/flink/pull/25729#discussion_r1871215561


##########
flink-table/flink-table-planner/src/main/scala/org/apache/flink/table/planner/plan/nodes/physical/batch/BatchPhysicalLookupJoin.scala:
##########
@@ -42,15 +43,22 @@ class BatchPhysicalLookupJoin(
     temporalTable: RelOptTable,
     tableCalcProgram: Option[RexProgram],
     joinInfo: JoinInfo,
-    joinType: JoinRelType)
+    joinType: JoinRelType,
+    lookupHint: Option[RelHint] = Option.empty,
+    enableLookupShuffle: Boolean = false,
+    preferCustomShuffle: Boolean = false)

Review Comment:
   For custom shuffle, `prefer` is used instead of `enable` because the 
connector may implement interface `SupportsLookupCustomShuffle`, but sometimes 
it does not want to shuffle data(i.e. 
SupportsLookupCustomShuffle#getPartitioner return EMPTY).



##########
flink-table/flink-table-planner/src/main/scala/org/apache/flink/table/planner/plan/nodes/physical/batch/BatchPhysicalLookupJoin.scala:
##########
@@ -42,15 +43,22 @@ class BatchPhysicalLookupJoin(
     temporalTable: RelOptTable,
     tableCalcProgram: Option[RexProgram],
     joinInfo: JoinInfo,
-    joinType: JoinRelType)
+    joinType: JoinRelType,
+    lookupHint: Option[RelHint] = Option.empty,
+    enableLookupShuffle: Boolean = false,
+    preferCustomShuffle: Boolean = false)

Review Comment:
   For custom shuffle, `prefer` is used instead of `enable` because the 
connector may implement interface `SupportsLookupCustomShuffle`, but sometimes 
it does not want to shuffle data(i.e. 
`SupportsLookupCustomShuffle#getPartitioner` return `EMPTY`).



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