GitHub user HyukjinKwon opened a pull request:
https://github.com/apache/spark/pull/15499
[SPARK-17955][SQL] Make DataFrameReader.jdbc call
DataFrameReader.format("jdbc").load
## What changes were proposed in this pull request?
This PR proposes to make `DataFrameReader.jdbc` call
`DataFrameReader.format("jdbc").load` consistently with other APIs in
`DataFrameReader`/`DataFrameWriter` and avoid calling
`sparkSession.baseRelationToDataFrame(..)` here and there.
The changes were mostly copied from `DataFrameWriter.jdbc()` which was
recently updated.
```
- val params = extraOptions.toMap ++ connectionProperties.asScala.toMap
- val options = new JDBCOptions(url, table, params)
- val relation = JDBCRelation(parts, options)(sparkSession)
- sparkSession.baseRelationToDataFrame(relation)
+ this.extraOptions = this.extraOptions ++ connectionProperties.asScala
+ // explicit url and dbtable should override all
+ this.extraOptions += ("url" -> url, "dbtable" -> table)
+ format("jdbc").load()
```
## 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-17955
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/15499.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 #15499
----
commit aa8cd3507d6ae79c0b2c93a077e655880d10a01c
Author: hyukjinkwon <[email protected]>
Date: 2016-10-15T12:36:01Z
Use the same read path in DataFrameReader.jdbc and
DataFrameReader.format("jdbc")
commit 0d6e2d1aa6a3348c4fad5256b7580364499d3daf
Author: hyukjinkwon <[email protected]>
Date: 2016-10-15T12:39:11Z
Add missing dots
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