Github user dongjoon-hyun commented on the issue:
https://github.com/apache/spark/pull/14132
Hi, @rxin and @gatorsmile .
While I'm investigating `SQLBuilder` and building more exhaustive
testcases, I found that `SQLBuilder` seems to be **not exhaustive currently**.
It's not about `Hint` issue.
```scala
scala> spark.range(10).createOrReplaceTempView("t")
scala> new org.apache.spark.sql.catalyst.SQLBuilder(sql("select * from
t")).toSQL
java.lang.UnsupportedOperationException: unsupported plan Range (0, 10,
splits=8)
scala> new org.apache.spark.sql.catalyst.SQLBuilder(sql("select * from
parquet.`examples/src/main/resources/users.parquet`")).toSQL
java.lang.UnsupportedOperationException: unsupported plan
Relation[name#21,favorite_color#22,favorite_numbers#23] parquet
```
I tried to make this PR as similar as possible with `broadcast()`
behaviors, but it seems to be the beyond of the scope in `SQLBuilder`. We can
not put all of them into this PR since they are not `Hint`.
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