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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2021/12/09 13:12:22 UTC
[GitHub] [spark] zhengruifeng commented on pull request #34850: [SPARK-37597][WIP] Deduplicate the right side of left-semi join and left-anti join
zhengruifeng commented on pull request #34850:
URL: https://github.com/apache/spark/pull/34850#issuecomment-989840218
test case:
```
spark.range(0, 10000, 1, 10).selectExpr("id % 1000 as key1", "id % 3 as value1").createOrReplaceTempView("table1")
spark.range(0, 10000000, 1, 10).selectExpr("id % 100 as key2", "id as value2").createOrReplaceTempView("table2")
spark.sql("SELECT key1 FROM table1 LEFT ANTI JOIN table2 ON key1 = key2").write.mode("overwrite").parquet("/tmp/tmp1.parquet")
```
master:
```
== Physical Plan ==
Execute InsertIntoHadoopFsRelationCommand (22)
+- AdaptiveSparkPlan (21)
+- == Final Plan ==
* Project (14)
+- * SortMergeJoin LeftAnti (13)
:- * Sort (5)
: +- AQEShuffleRead (4)
: +- ShuffleQueryStage (3)
: +- Exchange (2)
: +- * Range (1)
+- * Sort (12)
+- AQEShuffleRead (11)
+- ShuffleQueryStage (10)
+- Exchange (9)
+- * Project (8)
+- * Filter (7)
+- * Range (6)
```
this pr:
```
== Physical Plan ==
Execute InsertIntoHadoopFsRelationCommand (25)
+- AdaptiveSparkPlan (24)
+- == Final Plan ==
* Project (16)
+- * BroadcastHashJoin LeftAnti BuildRight (15)
:- AQEShuffleRead (4)
: +- ShuffleQueryStage (3)
: +- Exchange (2)
: +- * Range (1)
+- BroadcastQueryStage (14)
+- BroadcastExchange (13)
+- * HashAggregate (12)
+- AQEShuffleRead (11)
+- ShuffleQueryStage (10)
+- Exchange (9)
+- * HashAggregate (8)
+- * Project (7)
+- * Filter (6)
+- * Range (5)
```
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