GitHub user cloud-fan opened a pull request:
https://github.com/apache/spark/pull/16352
[SPARK-18947][SQL] SQLContext.tableNames should not call Catalog.listTables
## What changes were proposed in this pull request?
It's a huge waste to call `Catalog.listTables` in `SQLContext.tableNames`,
which only need the table names, while `Catalog.listTables` will get the table
metadata for each table name.
## How was this patch tested?
N/A
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/cloud-fan/spark minor
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/16352.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #16352
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commit f12dc7924dd3e4847578992d20d36a26d3d02792
Author: Wenchen Fan <[email protected]>
Date: 2016-12-20T14:27:37Z
SQLContext.tableNames should not call Catalog.listTables
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