Evan Chan created SPARK-13662:
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Summary: [SQL][Hive] Have SHOW TABLES return additional fields
from Hive MetaStore
Key: SPARK-13662
URL: https://issues.apache.org/jira/browse/SPARK-13662
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 1.6.0, 1.5.2
Environment: All
Reporter: Evan Chan
Currently, the SHOW TABLES command in Spark's Hive ThriftServer, or
equivalently the HiveContext.tables method, returns a DataFrame with only two
columns: the name of the table and whether it is temporary. It would be really
nice to add support to return some extra information, such as:
- Whether this table is Spark-only or a native Hive table
- If spark-only, the name of the data source
- potentially other properties
The first two is really useful for BI environments connecting to multiple data
sources and that work with both Hive and Spark.
Some thoughts:
- The SQL/HiveContext Catalog API might need to be expanded to return something
like a TableEntry, rather than just a tuple of (name, temporary).
- I believe there is a Hive Catalog/client API to get information about each
table. I suppose one concern would be the speed of using this API. Perhaps
there are other APis that can get this info faster.
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