GitHub user watermen opened a pull request:
https://github.com/apache/spark/pull/14988
[SPARK-17425][SQL] Override sameResult in HiveTableScanExec to make
ReusedExchange work in text format table
## What changes were proposed in this pull request?
The PR will override the `sameResult` in `HiveTableScanExec` to make
`ReusedExchange` work in text format table.
## How was this patch tested?
# SQL
```sql
SELECT * FROM src t1
JOIN src t2 ON t1.key = t2.key
JOIN src t3 ON t1.key = t3.key;
```
# Before
```
== Physical Plan ==
*BroadcastHashJoin [key#30], [key#34], Inner, BuildRight
:- *BroadcastHashJoin [key#30], [key#32], Inner, BuildRight
: :- *Filter isnotnull(key#30)
: : +- HiveTableScan [key#30, value#31], MetastoreRelation default, src
: +- BroadcastExchange HashedRelationBroadcastMode(List(cast(input[0, int,
false] as bigint)))
: +- *Filter isnotnull(key#32)
: +- HiveTableScan [key#32, value#33], MetastoreRelation default, src
+- BroadcastExchange HashedRelationBroadcastMode(List(cast(input[0, int,
false] as bigint)))
+- *Filter isnotnull(key#34)
+- HiveTableScan [key#34, value#35], MetastoreRelation default, src
```
# After
```
== Physical Plan ==
*BroadcastHashJoin [key#2], [key#6], Inner, BuildRight
:- *BroadcastHashJoin [key#2], [key#4], Inner, BuildRight
: :- *Filter isnotnull(key#2)
: : +- HiveTableScan [key#2, value#3], MetastoreRelation default, src
: +- BroadcastExchange HashedRelationBroadcastMode(List(cast(input[0, int,
false] as bigint)))
: +- *Filter isnotnull(key#4)
: +- HiveTableScan [key#4, value#5], MetastoreRelation default, src
+- ReusedExchange [key#6, value#7], BroadcastExchange
HashedRelationBroadcastMode(List(cast(input[0, int, false] as bigint)))
```
cc: @davies @cloud-fan
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/watermen/spark SPARK-17425
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/14988.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 #14988
----
commit 8e537a161560a6d717a40d8aae44b1973dda9695
Author: Yadong Qi <[email protected]>
Date: 2016-09-07T01:26:46Z
Override sameResult in HiveTableScanExec.
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