cfmcgrady commented on pull request #33146:
URL: https://github.com/apache/spark/pull/33146#issuecomment-871895699
> Hey mind explaining why cast path issue is related to being cached?
Actually, the cached result is what we want. The issue is that
`spark.read.json` is not an expected result when the input schema has a
nullable setting to false. From the log, we found it's a cast operation.
```
=== Result of Batch Preparations ===
CollectLimit 21 CollectLimit 21
!+- Project [cast(value#5 as string) AS value#18] +- *(1) Project
[cast(value#5 as string) AS value#18]
! +- Scan ExistingRDD[value#5] +- *(1) Scan
ExistingRDD[value#5]
```
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