Ah, oo :-)
I can reproduce now in the docker!
After seeing
src/core/providers/ogr/qgsogrprovider.cpp:3236 : (crs) [0ms] no spatial
reference found
in the debug info of that other db, I thought to try to load the data WITHOUT
telling it EPSG:31370:
So instead of:
ogr2ogr -update
"mysql:test,user=root,password=passwd,port=33060,host=127.0.0.1" test.csv
-select id -nlt point -a_srs EPSG:31370
I removed the test table and did
ogr2ogr -update
"mysql:test,user=root,password=passwd,port=33060,host=127.0.0.1" test.csv
-select id -nlt point
THEN I see exact the behaviour you see in the db with the issue:
- QGIS loads the layer (using 31370 project!), without crs (seeing the little
globe with ? in it in the layer manager-
- BUT if you do 'zoom to data' you zoom the the right place in the world
- you can see the attributes in the attribute table
- and even after assigning EPSG:31370 to the layer: NO point visible in Belgium!
Note that loading the layer in a EPSG:4326 table, and assigning 31370 to the
layer, QGIS does not zoom to Belgium...
Is this helpfull?
Or is this just a data issue?
Regards,
Richard Duivenvoorde
On 1/23/24 13:40, Even Rouault wrote:
Richard,
I've failed to reproduce. Here's my testing procedure:
docker run --name gdal-mysql1 -e MYSQL_ROOT_PASSWORD=passwd -e
"MYSQL_ROOT_HOST=%" -p 33060:3306 -d mysql:8.0.34 mysqld
--default-authentication-plugin=mysql_native_password
docker exec gdal-mysql1 sh -c "echo 'CREATE DATABASE test; SELECT Version()' | mysql
-uroot -ppasswd"
printf 'id,WKT\n1,"POINT(168937.186906043 175180.302889316)"\n' > test.csv
ogr2ogr -update
"mysql:test,user=root,password=passwd,port=33060,host=127.0.0.1" test.csv
-select id -nlt point -a_srs EPSG:31370
then opening it with QGIS displays the point on the canvas and the attribute
table. I can also add other points.
Even
Le 16/01/2024 à 20:07, Richard Duivenvoorde via QGIS-Developer a écrit :
No hints :-) ?
I now have a live connection to the db, and can reproduce the issue here in
master on Linux too.
It's really strange: have a local db, I can even copy features from the
attribute table to my local table, and THEN they show up
ogrinfo shows exactly the same information of the db ( using -so).
coordinates are fine too:
select coord, ST_AsWKT(coord) from tblQgisProjecten tqp limit 1
coord |ST_AsWKT(coord) |
-----------------------------------------+----------------------------------------+
POINT (168937.186906043 175180.302889316)|POINT(168937.186906043
175180.302889316)|
could it be in char encoding, or in a strange attribute value? We already tried
to create a simple view with only coord and ID, but that did not show something
either.
As I cannot share the connection info, I'm happy to share my screen or so to
show this.
SELECT version();
version()|
---------+
8.0.34-26|
but is an upgraded db, not sure where it came from
Regards,
Richard Duivenvoorde
On 1/12/24 15:06, Richard Duivenvoorde via QGIS-Developer wrote:
Hi Devs,
I was contacted by a company who after upgrading their db and QGIS did NOT see
the points anymore.
Note that 'all worked' when they used QGIS 3.10 (and an older mysql db)
After a MySQL database upgrade, QGIS 3.10 was not able to connect anymore
(apparently TLS issues), so they have to use 3.28 or higher.
A small export loaded in my local db was OK in QGIS.
So in a online meeting, sharing their screen I tried:
- opening the db with ogrinfo: all data is visible (POINT(.....)) showing
correct coords and attributes
- loading the table (25000 records) in QGIS: data: EPSG:31370 project
EPSG:31370 :
- attribute table shows all records
- mapcanvas empty!
- able to 'zoom to' records (Belgium), but NO points visible/selectable
- creating a tiny table with only id and geom column of 3 records: mapcanvas
emtpy
- export the loaded (but invisible) layer to a geopackage: points AND
attributes VISIBLE!
- loading the data in dbeaver: all data is shown in the spatial tab
There was an encoding issue when exporting to gpkg, but we tried to create a
smaller table (very few columns): nothing.
Anybody familiar with QGIS and Mysql has an idea what this not showing of any
point/geom could be?
Any hint appreciated, I plan to try to get a connection to the db myself, but
hoping I just miss something obvious...
Regards,
Richard Duivenvoorde
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