MDEV-10980: Fix reverse queries in OQGRAPH.

[pprkut]

This was partially discussed on oqgraph-devel (thread starting at https://lists.launchpad.net/oqgraph-dev/msg00319.html) with @pastcompute, but not fully reviewed yet.

[pastcompute]

Good job @pprkut , including updating the test results. Looks obvious now on seeing your patch, but this has been hiding in plain sight since before 2013 :-/ Sorry I couldn't help much, its been a long time since I used any of this
Your same patch should apply without problems in 10.1 I would expect, too

[svoj]

Hi Heinz,

Thanks for your contribution. JIRA task just for the record: https://jira.mariadb.org/browse/MDEV-10980

This task was added to 10.2.5 backlog, which is planned to be handled between 2016-12-15 and 2016-12-22.

Similar to other open source projects, the MariaDB Foundation needs to have shared ownership of all code that is included in the MariaDB distribution. The easiest way to achieve this is by submitting your code under the BSD-new license.

The other alternative is to sign the code contribution agreement which can be found here: https://mariadb.com/kb/en/mariadb/mca/

Please indicate in a comment below that you are contributing your new code of the whole pull request, including one or several files that are either new files or modified ones, under the BSD-new license or that you have filled out the contribution agreement and sent it.

Thanks,
Sergey

[pprkut]

Hi Sergey,

I hereby confirm that I contribute all changes and additions in this pull request under the BSD-new license.

[cvicentiu]

Hi @pprkut !

Sorry for such a delayed review. The patch works perfectly. Thank you very much for the contribution!

[pprkut]

Awesome! Thanks! :)