Author: Paul Holden
MDL-83361 reportbuilder: date aggregation for timestamp columns.
This change introduces updates to the existing aggregation API, to
allow types to define whether to group by fields of a column to which
the aggregation is applied.
The new date aggregation utilises this, to allow for creation of time
series reports, e.g. report data grouped by dates.
Co-authored-by: Daniel Neis Araujo <danielneis@gmail.com>
http://git.moodle.org/gw?p=moodle.git;a=commit;h=812975e2184f1d23a90abdc3ee8d23ee46aea0ed
http://github.com/moodle/moodle/commit/812975e2184f1d23a90abdc3ee8d23ee46aea0ed
+ 5.0 en [aggregationdate,core_reportbuilder]