[Qgis-developer] have aggregate/window expressions ever been discussed?

G. Allegri giohappy at gmail.com
Fri May 23 10:34:16 PDT 2014

Recently I had to calculate the relative dimension of a polygon relative to
the others of the same class. I know there are a lot of way to do it,
inside and outside QGIS, but I wondered if field calculator (and
expressions in general) couls be extended to accompish this kind of tasks.

The approach would be something similar WINDOW functions in Postgresql [1],
where for each record a new value will be calculated on the basis of other
records (filtered or not).

Has this ever been discussed? Is it something that could fit QGIS


[1] http://www.postgresql.org/docs/9.1/static/tutorial-window.html

Giovanni Allegri
Twitter: https://twitter.com/_giohappy_
blog: http://blog.spaziogis.it
GEO+ geomatica in Italia http://bit.ly/GEOplus
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