GitHub user HyukjinKwon opened a pull request:
https://github.com/apache/spark/pull/14313
[SPARK-16674][SQL] Avoid per-record type dispatch in JDBC when reading
## What changes were proposed in this pull request?
Currently, `JDBCRDD.compute` is doing type dispatch for each row to read
appropriate values.
It might not have to be done like this because the schema is already kept
in `JDBCRDD`.
So, appropriate converters can be created first according to the schema,
and then apply them to each row.
## How was this patch tested?
Existing tests should cover this.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/HyukjinKwon/spark SPARK-16674
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/14313.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 #14313
----
commit ad64483e2263485f843a469310fb8d252824d09e
Author: hyukjinkwon <gurwls...@gmail.com>
Date: 2016-07-22T03:32:44Z
Avoid per-record type dispatch in JDBC when reading
----
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastruct...@apache.org or file a JIRA ticket
with INFRA.
---
---------------------------------------------------------------------
To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org
For additional commands, e-mail: reviews-h...@spark.apache.org
