Github user budde commented on the issue:
https://github.com/apache/spark/pull/16944
I've updated the PR based on feedback received. Changes from previous
commit:
- Fixed a couple indent issues
- Clarify some HiveSchemaInferenceSuite comments and general cleanup
- Add CatalogTable checks and ```NEVER_INFER``` test to SchemaInferenceSuite
- Added additional info/error logging to HiveMetastoreCatalog
- Catch nonfatal exceptions from alterTable() call in HiveMetastoreCatalog
- Change param name to ```spark.sql.hive.caseSensitiveInferenceMode```
- Rename ```CatalogTable.schemaFromTableProps``` to
```CatalogTable.schemaPreservesCase```
- Introduce ```HiveCaseSensitiveInferenceMode``` enumeration type to get
rid of "magic strings" used for inference modes
- Use updated CatalogTable record in LogicalRelation if
```INFER_AND_SAVE``` used
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