Tuesday 24 February 2015

qgis - Postgis 2.1 error after update


After a usual update progress - "apt-get upgrade" - I can not connect with qGIS to my PostGIS DB anymore.


Error in the qGIS logfile:


Your database has no working PostGIS support. 
Erroneous query: SELECT postgis_version() returned 7 [ERROR: could not load library "/usr/lib/postgresql/9.3/lib/postgis-2.1.so": liblwgeom-2.1.2.so: cannot open shared object file: No such file or directory]
Retrieval of postgis version failed

After asking for my version using SELECT PostGIS_full_version(); This occured:


ERROR:  could not load library "/usr/lib/postgresql/9.3/lib/postgis-2.1.so": liblwgeom-2.1.2.so: cannot open shared object file: No such file or directory 
CONTEXT: SQL statement "SELECT postgis_lib_version()"

PL/pgSQL function postgis_full_version() line 19 at SQL statement

How can I fix that?


Thats my environment: xUbuntu 14.04, PostgreSQL 9.3, Postgis 2.1, QGIS 2.3,



Answer



As you can read here it could be a bug of the upgrade procedure.


Waiting for fixing I advise you to can follow the workaround:


apt-get remove postgresql-9.3-postgis-2.1 liblwgeom-2.1.3 liblwgeom-2.1.2 postgis

The actual versions can be other than in the example. Use commands like this to find the packages to remove:



dpkg -l | grep liblwgeom
dpkg -l | grep postgis

Followed by:


apt-get install postgresql-9.3-postgis-2.1

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