[Oracle] Digitizing a new curve not working with QGIS 3.28.1

[Jean-Roc]

What is the bug or the crash?

Hi,

We have a change of behaviour when editing an Oracle layer to add or edit a curve using the digitizing tools, QGIS 3.24 saves a correct 3-nodes arc while 3.28 saves a densified linestring. The base layer and the project are strictly the same.

On this screencap, the upper geometry was created and saved with 3.24.2 and the lower with 3.28.1

Steps to reproduce the issue

1. Open an Oracle table (geom type multiline)
2. QGIS 3.24.2
   1. Toggle editing
   2. Add a new line feature and toggle Digitize with Curve
   3. Trace a single curve and save
   4. Toggle the vertex tool and click on the created curve -> it shows a curve with only 3 nodes as intended
3. QGIS 3.28.1
   1. Toggle editing
   2. Add a new line feature and toggle Digitize with Curve
   3. Trace a single curve and save
   4. Toggle the vertex tool and click on the created curve -> it shows a densified linestring

Versions

Both are the official windows packages

QGIS version 3.24.2-Tisler
QGIS code revision 13c1a02

QGIS version 3.28.1-Firenze
QGIS code revision fde3b8f

Supported QGIS version

• I'm running a supported QGIS version according to the roadmap.

New profile

• I tried with a new QGIS profile

Additional context

No response

[troopa81]

#51378 will fix new added layer, but for existing projects, you need to change the geometry type with CompoundCurve.

To migrate, with python, you can iterate on your layers and change the dataSource with the following instruction

new_uri=iface.activeLayer().dataProvider().dataSourceUri().replace("type=LineString","type=CompoundCurve")
iface.activeLayer.setDataSource(new_uri, 'test', 'oracle')