ulysses-you commented on pull request #29034:
URL: https://github.com/apache/spark/pull/29034#issuecomment-656113225
It's ok to add an attribute `isCached` but it is not enough. 2 reasons:
1. A database can contains hundreds tables, `spark.sql("show
tables").where("isCached= true").show` can not used in sql mode. Then it's
hard to find all cached tables in all tables.
2. `SHOW TABLES` in `SparkSQLDriver` only show the table name without other
attribute which is for compatible with Hive. Then the new attribute is useless
in this scene.
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