ueshin opened a new pull request, #50549:
URL: https://github.com/apache/spark/pull/50549
### What changes were proposed in this pull request?
This is a follow-up of #50537.
Fixes `HashJoin` to accept structurally-equal types.
### Why are the changes needed?
#50537 relaxed the requirement for binary comparison, so should `HashJoin`;
otherwise, it can fail with `IllegalArgumentException`.
For example, in `SubquerySuite`:
```scala
sql("""
|SELECT foo IN (SELECT struct(c, d) FROM r)
|FROM (SELECT struct(a, b) foo FROM l)
|""".stripMargin).show()
```
fails with:
```
[info] java.lang.IllegalArgumentException: requirement failed: Join keys
from two sides should have same length and types
[info] at scala.Predef$.require(Predef.scala:337)
[info] at
org.apache.spark.sql.execution.joins.HashJoin.org$apache$spark$sql$execution$joins$HashJoin$$x$6(HashJoin.scala:115)
[info] at
org.apache.spark.sql.execution.joins.HashJoin.org$apache$spark$sql$execution$joins$HashJoin$$x$6$(HashJoin.scala:110)
[info] at
org.apache.spark.sql.execution.joins.BroadcastHashJoinExec.org$apache$spark$sql$execution$joins$HashJoin$$x$6$lzycompute(BroadcastHashJoinExec.scala:40)
[info] at
org.apache.spark.sql.execution.joins.BroadcastHashJoinExec.org$apache$spark$sql$execution$joins$HashJoin$$x$6(BroadcastHashJoinExec.scala:40)
[info] at
org.apache.spark.sql.execution.joins.HashJoin.buildKeys(HashJoin.scala:110)
[info] at
org.apache.spark.sql.execution.joins.HashJoin.buildKeys$(HashJoin.scala:110)
[info] at
org.apache.spark.sql.execution.joins.BroadcastHashJoinExec.buildKeys$lzycompute(BroadcastHashJoinExec.scala:40)
[info] at
org.apache.spark.sql.execution.joins.BroadcastHashJoinExec.buildKeys(BroadcastHashJoinExec.scala:40)
[info] at
org.apache.spark.sql.execution.joins.HashJoin.buildBoundKeys(HashJoin.scala:130)
[info] at
org.apache.spark.sql.execution.joins.HashJoin.buildBoundKeys$(HashJoin.scala:129)
[info] at
org.apache.spark.sql.execution.joins.BroadcastHashJoinExec.buildBoundKeys$lzycompute(BroadcastHashJoinExec.scala:40)
[info] at
org.apache.spark.sql.execution.joins.BroadcastHashJoinExec.buildBoundKeys(BroadcastHashJoinExec.scala:40)
[info] at
org.apache.spark.sql.execution.joins.BroadcastHashJoinExec.requiredChildDistribution(BroadcastHashJoinExec.scala:63)
...
```
### Does this PR introduce _any_ user-facing change?
Yes, `HashJoin` will work.
### How was this patch tested?
Added the related test.
### Was this patch authored or co-authored using generative AI tooling?
No.
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