phpMyAdmin work during the forty first week

During this week I attended to bug fixes, new features as well as general coding improvements. 

The highlight of the week in terms bug fixes was the ability to use error reporting server. It was not usable for a long time and now that the situation has improved to Smitha, I attended to a number of bugs reported there. I noticed that a large number of bugs were due to caching issue while upgrading. This affected relational features on PHP front while a number of JS issues reported were also due to this. I also engaged in reporting issues and sending pull requests to improve the error reporting server. Bugs fixed and attended during the week are

Bugs fixed
#4979 Problem when import *.ods file
#4980 Cannot read property 'status' of null
#4981 Uncaught TypeError: Cannot read property 'attr' of null
#4984 Undefined <feature>work upon upgrade to new version
#4985 Column headers move when scrolling

Bugs investigated
#4983 Theme configurations not defined
#4986 First stack trace item missing in PHP error reports

The highlight in terms of new feature is the support for virtual columns. Support for virtual columns was initially requested for MariaDB. However my earlier attempt to implement the feature was abandoned due to lack of parser support. Virtual columns are featured in upcoming MySQL 5.7 as well and since the column expression can be extracted from information_schema in MySQL I could add support for MySQL virtual columns without parser update. After discussing this on developer mailing list GSoC student who is working on the parser rewrite added support for virtual columns to the new parser and with this I went on to extend the feature for MariaDB as well.

Feature requests implemented
#1517 Support for MariaDB virtual/persistent columns
Support MySQL 5.7.5 virtual columns

Feature requests investigated
#1658 Better Performance

To the latter part of the week I worked on improving coding style which had deteriorated a bit during the last couple of months.

Coding improvements
Centralize querying for SHOW CREATE TABLE statements
Documentation improvements on upgrading
Fix PHP coding style violations reported by PHPCS

Forty first week of my work was a four day week with me taking 16th of July as day off.