Github user xubo245 commented on the issue:
https://github.com/apache/carbondata/pull/2804
@KanakaKumar ok, I unify the interface to readSchema
[CARBONDATA-2996] CarbonSchemaReader support read schema from folder path
1.Deprecated readSchemaInIndexFile and readSchemaInDataFile, unify them
to readSchema
2.Deprecated readSchemaInSchemaFile
3.readSchema support read schema from folder path,carbonindex file, and
carbondata file. and user can decide whether check all files schema
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