Qgis assertion when loading a postgres layer when the postgis extent() function is missing

[g_j_m]

Qgis crashes (with an assertion) when loading a postgres layer when the postgis extent() function is missing. This is clearly a problem with the setup of the database, but qgis could be a bit more robust with unexpected behaviour from postgres.

Debug: qgspostgresprovider.cpp: 2526: (calculateExtents)
+++++++++QgsPostgresProvider::calculateExtents -  Getting extents using
schema.table: select extent("trackline") from "public"."t_station"
Fatal: ASSERT: "PQntuples(result) == 1" in file qgspostgresprovider.cpp,
line 2529
Aborted

and a similar query from psql:

omandb=# select extent(trackline) from t_station;
ERROR:  function extent(geometry) does not exist
HINT:  No function matches the given name and argument types. You may
need to add explicit type casts.

[jef]

fixed in r7661

[(none)]

Milestone Version 0.9.1 deleted