[SPARK-20908] [SQL] Cache Manager: Hint should be ignored in plan matching #18131
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cc @cloud-fan |
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LGTM |
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Test build #77475 has finished for PR 18131 at commit
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asfgit
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### What changes were proposed in this pull request?
In Cache manager, the plan matching should ignore Hint.
```Scala
val df1 = spark.range(10).join(broadcast(spark.range(10)))
df1.cache()
spark.range(10).join(spark.range(10)).explain()
```
The output plan of the above query shows that the second query is not using the cached data of the first query.
```
BroadcastNestedLoopJoin BuildRight, Inner
:- *Range (0, 10, step=1, splits=2)
+- BroadcastExchange IdentityBroadcastMode
+- *Range (0, 10, step=1, splits=2)
```
After the fix, the plan becomes
```
InMemoryTableScan [id#20L, id#23L]
+- InMemoryRelation [id#20L, id#23L], true, 10000, StorageLevel(disk, memory, deserialized, 1 replicas)
+- BroadcastNestedLoopJoin BuildRight, Inner
:- *Range (0, 10, step=1, splits=2)
+- BroadcastExchange IdentityBroadcastMode
+- *Range (0, 10, step=1, splits=2)
```
### How was this patch tested?
Added a test.
Author: Xiao Li <gatorsmile@gmail.com>
Closes #18131 from gatorsmile/HintCache.
(cherry picked from commit 06c155c)
Signed-off-by: Xiao Li <gatorsmile@gmail.com>
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What changes were proposed in this pull request?
In Cache manager, the plan matching should ignore Hint.
The output plan of the above query shows that the second query is not using the cached data of the first query.
After the fix, the plan becomes
How was this patch tested?
Added a test.