[Qgis-user] PostGIS- erroneous query : Unable to get list of tables from DB

Jason Carlson jason at starlandcounty.com
Tue Nov 19 06:18:17 PST 2019


The error message would still suggest it is an access problem to the
topology table. Perhaps you need to take it a step further with your
postgres version and grant select to the user.

Not at my computer now but try something along the lines of:

GRANT SELECT ON topology TO username;



On Mon., Nov. 18, 2019, 5:10 p.m. Laurence Béchet, <
bechet.laurence at gmail.com> wrote:

> Thank you Jason for your answer.
> I've granted usage on schema topology to my user -> same problem. I even
> granted PUBLIC.
>
> There is something 'wrong' with the passed request itself as it fails in
> pgadmin as well (see it below).
>
> I have a very basic test.qgz file. I launch it with 3.4.13 (I've updated
> all my qgis versions), open the browser, connect to my db and see the
> tables. Same file, launched with 3.10.0, open browser, connect to my db
> (same profile so I guess same qgis-auth.db file I suppose) and get the
> 'failed to get layers' as described in the bug. I can see the sql request
> which failed and that one doesn't work either in pg_admin. Unfortunately
> the sql request passed with 3.4.13 is not displayed.
>
> SELECT
> l.f_table_name,l.f_table_schema,l.f_geometry_column,upper(l.type),l.srid,l.coord_dimension,c.relkind,obj_description(c.oid),array_agg(a.attname),
> count(CASE WHEN t.typname IN
> ('geometry','geography','topogeometry','raster') THEN 1 ELSE NULL END) , 1
> FROM geometry_columns l,pg_class c,pg_namespace n,pg_attribute a,pg_type t
> WHERE c.relname=l.f_table_name AND l.f_table_schema=n.nspname AND NOT
> a.attisdropped AND a.attrelid=c.oid AND a.atttypid=t.oid AND a.attnum>0 AND
> n.oid=c.relnamespace AND has_schema_privilege(n.nspname,'usage') AND
> has_table_privilege('"'||n.nspname||'"."'||c.relname||'"','select') GROUP
> BY 1,2,3,4,5,6,7,c.oid,11 UNION SELECT
> l.f_table_name,l.f_table_schema,l.f_geography_column,upper(l.type),l.srid,2,c.relkind,obj_description(c.oid),array_agg(a.attname),
> count(CASE WHEN t.typname IN
> ('geometry','geography','topogeometry','raster') THEN 1 ELSE NULL END) , 1
> FROM geography_columns l,pg_class c,pg_namespace n,pg_attribute a,pg_type t
> WHERE c.relname=l.f_table_name AND l.f_table_schema=n.nspname AND NOT
> a.attisdropped AND a.attrelid=c.oid AND a.atttypid=t.oid AND a.attnum>0 AND
> n.oid=c.relnamespace AND has_schema_privilege(n.nspname,'usage') AND
> has_table_privilege('"'||n.nspname||'"."'||c.relname||'"','select') GROUP
> BY 1,2,3,4,5,6,7,c.oid,11 UNION SELECT
> l.table_name,l.schema_name,l.feature_column,CASE WHEN l.feature_type = 1
> THEN 'MULTIPOINT' WHEN l.feature_type = 2 THEN 'MULTILINESTRING' WHEN
> l.feature_type = 3 THEN 'MULTIPOLYGON' WHEN l.feature_type = 4 THEN
> 'GEOMETRYCOLLECTION' END AS type,(SELECT srid FROM topology.topology t
> WHERE l.topology_id=t.id),2,c.relkind,obj_description(c.oid),array_agg(a.attname),
> count(CASE WHEN t.typname IN
> ('geometry','geography','topogeometry','raster') THEN 1 ELSE NULL END) , 1
> FROM topology.layer l,pg_class c,pg_namespace n,pg_attribute a,pg_type t
> WHERE c.relname=l.table_name AND l.schema_name=n.nspname AND NOT
> a.attisdropped AND a.attrelid=c.oid AND a.atttypid=t.oid AND a.attnum>0 AND
> n.oid=c.relnamespace AND has_schema_privilege(n.nspname,'usage') AND
> has_table_privilege('"'||n.nspname||'"."'||c.relname||'"','select') GROUP
> BY 1,2,3,4,5,6,7,c.oid,11 UNION SELECT
> l."table",l."schema",l."column",'POLYGON',l.srid,2,c.relkind,obj_description(c.oid),array_agg(a.attname),
> count(CASE WHEN t.typname IN
> ('geometry','geography','topogeometry','raster') THEN 1 ELSE NULL END) , 1
> FROM pointcloud_columns l,pg_class c,pg_namespace n,pg_attribute a,pg_type
> t WHERE c.relname=l."table" AND l."schema"=n.nspname AND NOT a.attisdropped
> AND a.attrelid=c.oid AND a.atttypid=t.oid AND a.attnum>0 AND
> n.oid=c.relnamespace AND has_schema_privilege(n.nspname,'usage') AND
> has_table_privilege('"'||n.nspname||'"."'||c.relname||'"','select') GROUP
> BY 1,2,3,4,5,6,7,c.oid,11 UNION SELECT
> l."r_table_name",l."r_table_schema",l."r_raster_column",'RASTER',l.srid,2,c.relkind,obj_description(c.oid),array_agg(a.attname),
> count(CASE WHEN t.typname IN
> ('geometry','geography','topogeometry','raster') THEN 1 ELSE NULL END) , 1
> FROM raster_columns l,pg_class c,pg_namespace n,pg_attribute a,pg_type t
> WHERE c.relname=l."r_table_name" AND l."r_table_schema"=n.nspname AND NOT
> a.attisdropped AND a.attrelid=c.oid AND a.atttypid=t.oid AND a.attnum>0 AND
> n.oid=c.relnamespace AND has_schema_privilege(n.nspname,'usage') AND
> has_table_privilege('"'||n.nspname||'"."'||c.relname||'"','select') GROUP
> BY 1,2,3,4,5,6,7,c.oid,11 ORDER BY 2,1,3
> ;
>
> I have postgresql 9.6, postGIS 2.3
>
> Kind regards
> Laurence
> On 19/11/2019 4:28 AM, Jason Carlson wrote:
>
> I think your issue sounds like what I experienced and from what I dug up
> it can be as simple as what version of Postgres you were using (I was using
> Postgres version 10.10) not allowing any access to the "topology" schema.
> https://github.com/qgis/QGIS/issues/32483
>
> I fixed by running the following SQL command (replace *USERNAME as the
> username* you are using to connect to postgres):
> *GRANT USAGE ON SCHEMA topology TO USERNAME;*
>
> it was also suggested you could instead give access to public but I'm not
> sure if that is as secure but maybe other issues are created if public
> doesn't have access, this is not my area of expertise.
> GRANT USAGE ON SCHEMA topology TO PUBLIC;
>
> Hope that helps.
>
> *Jason Carlson*
>
>
> On Fri, Nov 15, 2019 at 7:30 PM Laurence Béchet <bechet.laurence at gmail.com>
> wrote:
>
>> Good afternoon,
>>
>> Windows 8.1 pro 64 bits
>> QGIS version 3.10.0-A Coruña QGIS code revision 6c816b4204
>>
>> I have a postgresql db with Postgis enabled to which I connect using a pg
>> service.
>> It was working fine with the default profile.
>>
>> I created a new profile (settings/user profiles). My projects were still
>> displayed (tables located in the db) and looked ok.
>>
>> But when I wanted to add a new table from datasource manager/postgresql I
>> was prompted the first time to create a connection. I created the same one
>> as I had for the default profile. I tested the connection and it passed. I
>> clicked to 'connect' and nothing happened: no table list displayed. I
>> checked with DB/DB manager and I can see my tables.
>> I switched back to the former default profile: same behaviour (no tables
>> listed).
>>
>> There are  different qgis-auth.db files (different sizes) in each profile
>> folder of C:\Users\<myuser>\AppData\Roaming\QGIS\QGIS3\profiles (don't know
>> how to read them though)
>>
>> In the logs I found the following messages (PostGIS section):
>> 2019-11-16T12:27:02     WARNING    NOTICE: row number 0 is out of range
>> 0..-1
>> 2019-11-16T12:28:20     WARNING    Erroneous query: <long query> [ERROR:
>> permission denied for schema topology
>> 2019-11-16T12:28:20     WARNING    NOTICE: WARNING: there is no
>> transaction in progress
>> 2019-11-16T12:28:20     WARNING    Unable to get list of spatially
>> enabled tables from the database
>>
>> I don't have any problem with the default user and QGIS version
>> 3.4.13-Madeira
>> (I have not tried to create another profile with 3.4.13 because I need a
>> working version of qgis).
>>
>> The error message seems to point toward a lack of permission, but that
>> same user can run that query within pgadmin without any problems.
>>
>> Any idea where to look? I looked on internet but to no avail ...
>>
>> Thank you in advance
>> Laurence Bechet
>> *ARK IN THE PARK Volunteer Co-Ordinator*
>> *Cascades Ranger Station*
>> * Falls Road, Waitakere*, Auckland
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>
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<http://www.starlandcounty.com>**
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