GitHub user gatorsmile opened a pull request:
https://github.com/apache/spark/pull/18131
[SPARK-20908] [SQL] Cache Manager: Hint should be ignored in plan matching
### 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.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/gatorsmile/spark HintCache
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/18131.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #18131
----
commit c7e2cc9a7c9804138fc03f1edbae3f6cda6505a9
Author: Xiao Li <[email protected]>
Date: 2017-05-27T23:15:39Z
fix.
----
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
