[Qgis-user] updating postgres updateable view much slower from attribute table than using db manager

[Janneke van Dijk]

Dear list,

I have an updateable spatial view in Postgres loaded into QGIS 2.10. 
When I update 6999 records in this view in the db manager with the 
following statement:
update v_prepare_assessment_id SET districtid = 8 where locationid > 
13000 and locationid < 20000
it takes 2.7 seconds to complete.

When I open the attribute table, select the same records, then use the 
update bar in the top to update the districtid to 8, using 'update 
selected' , then save edits, it takes more than 10 minutes (after which 
I closed the project).

Doing the same update directly on the attribute table of the underlying 
postgres table works nicely (takes about 3 seconds) after save edits.

Does anyone know why the update via the attribute table on the view 
takes so long as to be unusable, while the db manager works nicely with 
the view? Seeing that working directly on the underlying table from the 
attribute table works well too it's seems to be a combination of the 
attribute table approach with an updateable view that seems to cause the 
issue.

Thanks for any thoughts on the matter,

Janneke