We should unify and clean up the outputs of `DESC EXTENDED/FORMATTED` and `SHOW TABLE EXTENDED` by moving the logics into the Catalog interface. The output formats are improved. We also add the missing attributes. It impacts the DDL commands like `SHOW TABLE EXTENDED`, `DESC EXTENDED` and `DESC FORMATTED`.
In addition, by following what we did in Dataset API `printSchema`, we can use `treeString` to show the schema in the more readable way.
- is related to
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SPARK-20954 DESCRIBE showing 1 extra row of "| # col_name | data_type | comment |"
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- Resolved
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- links to
