MaxGekk opened a new pull request #31577:
URL: https://github.com/apache/spark/pull/31577
### What changes were proposed in this pull request?
1. Make the following SQL configs as internal:
- spark.sql.legacy.allowHashOnMapType
- spark.sql.legacy.sessionInitWithConfigDefaults
2. Add a test to check that all SQL configs from the `legacy` namespace are
marked as internal configs.
### Why are the changes needed?
Assuming that legacy SQL configs shouldn't be set by users in common cases.
The purpose of such configs is to allow switching to old behavior in corner
cases. So, the configs should be marked as internals.
### Does this PR introduce _any_ user-facing change?
Should not.
### How was this patch tested?
By running new test:
```
$ build/sbt "test:testOnly *SQLConfSuite"
```
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