Github user jinfengni commented on the pull request:
https://github.com/apache/drill/pull/436#issuecomment-218630539
The patch will show "schema_name, location" for "describe schema xxx" when
it applied to file system schema. I'm not sure why you only want to make it
work for file system schema, and return "information not available" for other
schema. Also, what's the reason to only show "location"? What if we add support
for other schemas, and will "location" still make sense for non-filesystem
schema?
To me, it would make more sense to return all the properties of schema for
"describe schema/database", as a JSON format string. The properties could be
anything defined in the schema. For file system schema, it could be location,
whether writable, default input format, etc. For other schemas, there would be
schema-dependent properties. In case we add new properties to schema in later
release, there is no need to change the implementation of "describe schema".
In other words, "describe schema/database" should return the content shown in
webui storage tab for that particular schema.
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