[GENERAL] why jasperserver has been changed from MySQL to PostGreSQL

[farhad koohbor]

Why jasperserver has been changed from MySQL to PostGreSQL
In previous versions of jasperserver, MySQL was the supporting database but in 
the jasperserver 4.5 version it changed to PostGreSQL. 
My question is that why jasperserver changed its mind to PostGreSQL. Which of 
the features of PostGreSQL are powerful than MySQL? 
Could you please give me a clue?
 
Thanks and Regards
Farhad Koohbor – BI/DW developer