[QGIS-Developer] Error with "PostGIS execute SQL'

[matteo]

> Simple answer - it's not designed to return results. It's for
> executing commands like 'DROP DATABASE
> all_my_data_that_i_havent_backed_up'

ok, so no new tables are created with the SQL query added? It can be
used for all "hidden" commands (drop, create spatial index and so on?).

Is it the same for SpatiLite execute SQL function?

Thanks!

Matteo