wangyum commented on PR #50004:
URL: https://github.com/apache/spark/pull/50004#issuecomment-2677280562
```scala
spark.sql("set spark.sql.autoBroadcastJoinThreshold=-1")
spark.range(10000000).selectExpr("id", "id + 1 as
new_id").write.saveAsTable("t1")
spark.range(10).selectExpr("id").write.bucketBy(1, "id").saveAsTable("t2")
spark.sql("select * from t1 join t2 on t1.id = t2.id").explain("cost")
```
Spark 3.2:
```
== Physical Plan ==
AdaptiveSparkPlan isFinalPlan=false
+- SortMergeJoin [id#21L], [id#23L], Inner
:- Sort [id#21L ASC NULLS FIRST], false, 0
: +- Exchange hashpartitioning(id#21L, 200), ENSURE_REQUIREMENTS,
[plan_id=50]
: +- Filter isnotnull(id#21L)
: +- FileScan parquet default.t1[id#21L,new_id#22L] Batched: true,
DataFilters: [isnotnull(id#21L)], Format: Parquet, Location:
InMemoryFileIndex(1
paths)[file:/Users/yumwang/Downloads/spark-3.2.4-bin-hadoop3.2/spark-warehous...,
PartitionFilters: [], PushedFilters: [IsNotNull(id)], ReadSchema:
struct<id:bigint,new_id:bigint>
+- Sort [id#23L ASC NULLS FIRST], false, 0
+- Exchange hashpartitioning(id#23L, 200), ENSURE_REQUIREMENTS,
[plan_id=57]
+- Filter isnotnull(id#23L)
+- FileScan parquet default.t2[id#23L] Batched: true,
DataFilters: [isnotnull(id#23L)], Format: Parquet, Location:
InMemoryFileIndex(1
paths)[file:/Users/yumwang/Downloads/spark-3.2.4-bin-hadoop3.2/spark-warehous...,
PartitionFilters: [], PushedFilters: [IsNotNull(id)], ReadSchema:
struct<id:bigint>
```
After Spark 3.3:
```
== Physical Plan ==
AdaptiveSparkPlan isFinalPlan=false
+- SortMergeJoin [id#21L], [id#23L], Inner
:- Sort [id#21L ASC NULLS FIRST], false, 0
: +- Exchange hashpartitioning(id#21L, 1), ENSURE_REQUIREMENTS,
[plan_id=51]
: +- Filter isnotnull(id#21L)
: +- FileScan parquet default.t1[id#21L,new_id#22L] Batched: true,
DataFilters: [isnotnull(id#21L)], Format: Parquet, Location:
InMemoryFileIndex(1
paths)[file:/Users/yumwang/Downloads/spark-3.3.3-bin-hadoop3/spark-warehouse/t1],
PartitionFilters: [], PushedFilters: [IsNotNull(id)], ReadSchema:
struct<id:bigint,new_id:bigint>
+- Sort [id#23L ASC NULLS FIRST], false, 0
+- Filter isnotnull(id#23L)
+- FileScan parquet default.t2[id#23L] Batched: true, Bucketed:
true, DataFilters: [isnotnull(id#23L)], Format: Parquet, Location:
InMemoryFileIndex(1
paths)[file:/Users/yumwang/Downloads/spark-3.3.3-bin-hadoop3/spark-warehouse/t2],
PartitionFilters: [], PushedFilters: [IsNotNull(id)], ReadSchema:
struct<id:bigint>, SelectedBucketsCount: 1 out of 1
```
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