GitHub user mariusvniekerk opened a pull request:
https://github.com/apache/spark/pull/9861
[SPARK-11881][SQL] Fix for postgresql fetchsize > 0
Reference:
https://jdbc.postgresql.org/documentation/head/query.html#query-with-cursor
In order for PostgreSQL to honor the fetchSize non-zero setting, its
Connection.autoCommit needs to be set to false. Otherwise, it will just quietly
ignore the fetchSize setting.
This adds a new side-effecting dialect specific beforeFetch method that
will fire before a select query is ran.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/mariusvniekerk/spark SPARK-11881
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/9861.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 #9861
----
commit 464976670c2857a972b38aa4d32396915d7e0c0a
Author: mariusvniekerk <[email protected]>
Date: 2015-11-20T14:34:31Z
[SPARK-11881][SQL] Fix for postgresql fetchsize > 0
Reference:
https://jdbc.postgresql.org/documentation/head/query.html#query-with-cursor
In order for PostgreSQL to honor the fetchSize non-zero setting, its
Connection.autoCommit needs to be set to false. Otherwise, it will just quietly
ignore the fetchSize setting.
This adds a new side-effecting dialect specific beforeFetch method that
will fire before a select query is ran.
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