NetteDBDataSource - group by

[spernica]

When you have in query for NetteDBDataSource GROUP BY, queries looks like this:
SELECT COUNT() FROM table -- missing GROUP BY
SELECT * FROM table GROUP BY column

Right count will be like something this:
SELECT COUNT() FROM (SELECT … FROM table WHERE … GROUP BY column)

I compare NetteDBDataSource and DibiDataSource. DibiDataSource is working fine.

Testing on v2.0.7.2