ThaDafinser/ZfcDatagrid — pull request #90 by alessandropietrobelli (2014-04-09 10:10:50+00:00)
Title: Expression Column on Doctrine 2

i.e.
$col = new Column\Select('column_merge_name', 'r');
$col->setExpressionColumn('CONCAT(r.col1, \'-\', r.col2, \'-\', r.col3)');