[Qgis-user] [EXTERNAL] Re: Not query geometry types in layer browser?

Mon Jul 2 09:23:57 PDT 2018

Bryan,
I was having a similar issue before, it was due in my case to QGIS 
looking through the whole table to find what kinds of Geometry were in 
the table. In my case the addition of Geometry Constraints helped speed 
things greatly.

The only other way I know, which is quicker for loading Tables (if you 
have already added them as sources) would be to:

In QGIS 2.1X use the DB Manager, and drag and drop the Layers you want 
into QGIS, its considerably quicker, also good for adding views!

In QGIS 3.X, you can use the Data Source Manager to add the Layers, Dont 
use the icons on the Left (thats the same as the method you are having 
issues with), drill down through the Browser instead, you can add them 
from there, I find it much quicker. Again its a good method for adding 
Views.
Hope it helps, Regards,

Richard.

On 02/07/2018 17:03, Bryan Hall wrote:
>
> Classification: DCL-Internal
>
>
>
> Richard,
>
> Yes, I understand how to do that, and this is not the issue.
>
> The problem I have is that when I open the database connection, the 
> layer/table list polls the database for each and every accessible 
> item. That takes considerable time (I let it finish – the runtime was 
> about an hour and a half).
>
> I am asking if there is a configuration setting to disable this lookup 
> (beyond just polling the mdsys.sdo_geom_metadata_table for the 
> schema/table/column names) so that I can just open the browser, select 
> a table, and go on without waiting for it to load metadata about all 
> the other tables into the browser first.
>
> Bryan
>
> *From:*Qgis-user [mailto:qgis-user-bounces at lists.osgeo.org] *On Behalf 
> Of *Richard McDonnell
> *Sent:* Monday, July 02, 2018 08:59
> *To:* qgis-user at lists.osgeo.org
> *Subject:* [EXTERNAL] Re: [Qgis-user] Not query geometry types in 
> layer browser?
>
> Hi,
> If I understand your question correctly.
> I have little experience in Oracle DB's, but in PostgreSQL/PostGIS, 
> you can create a Geometry Constraint within your table, which states 
> what geometry is within the table, which speeds up QGIS in reading 
> table lists, when loading them.
> A quick search online resulted in
>
> https://docs.oracle.com/database/121/SPATL/constraining-data-geometry-type.htm#SPATL584 
> <https://urldefense.proofpoint.com/v2/url?u=https-3A__docs.oracle.com_database_121_SPATL_constraining-2Ddata-2Dgeometry-2Dtype.htm-23SPATL584&d=DwMDaQ&c=M7nMI6M-Uv3ihEfN-QJ3_sQdVexoO64eU4Ftr4lnVk0&r=-89XSUoV_kZKlHf89FQGuyqPyUjA53juyA-7r7GoZVA&m=kMsobCS1r-dtfVBLfC8RZmbtJAznC8lfOANCQ5nwhA8&s=S9z0VtIEHJoE-2R25LFRmKsUNxZRFR9i7AgsQo4TRmc&e=>
>
> Hope this helps!
> Regards,
>
> Richard.
>
> On 02/07/2018 14:34, Bryan Hall wrote:
>
>     Classification: DCL-Internal
>
>     Is there a way to configure QGIS to not query the geometry types
>     from each registered shape with an Oracle database when opening
>     the layer browser?
>
>     I ask because the database I am trying to load data from has 1486
>     registered tables, for which about 100 are external data (csv)
>     tables (much slower to query), and a few dozen are huge collection
>     geometry tables. QGIS currently takes “forever” (more than an hour
>     – I gave up waiting) for the layer browser to query and load all
>     the entries into the list. I really like QGIS in general, but this
>     issue makes it unusable as it is currently.
>
>     Thanks in advance,
>
>     Bryan
>
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> -- 
> *_Richard McDonnell_*
> *GIS Specialist PgD GIS AssocSCSI*
> *OPW FRM Data Management*
> *52 Stephens Green, Dublin 2.*
> TEL: 01 6476543
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-- 
*_Richard McDonnell_*
*GIS Specialist PgD GIS AssocSCSI*
*OPW FRM Data Management*
*52 Stephens Green, Dublin 2.*
TEL: 01 6476543
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