Oracle driver does not read some compound polygons

[Jukka Rahkonen]

Some compound polygon geometries from Oracle are converted into empty geometries. By a preliminary investigation I suspect that error happens when SDO_GEOMETRY contain circular arc elements which are expressed with more than 3 points which means that several arcs are connected to each other as a chain.

Issue can be repeated with an attached geometry.

Oracle document ​http://docs.oracle.com/database/122/SPATL/spatial-datatypes-metadata.htm#SPATL489

"Line string made up of a connected sequence of circular arcs.

Each circular arc is described using three coordinates: the start point of the arc, any point on the arc, and the end point of the arc. The coordinates for a point designating the end of one arc and the start of the next arc are not repeated. For example, five coordinates are used to describe a line string made up of two connected circular arcs. Points 1, 2, and 3 define the first arc, and points 3, 4, and 5 define the second arc, where point 3 is only stored once."

[Jukka Rahkonen]

SQL insert for the problematic geometry

[Even Rouault]

This ticket has been automatically closed because Trac is no longer used for GDAL bug tracking, since the project has migrated to GitHub. If you believe this ticket is still valid, you may file it to ​https://github.com/OSGeo/gdal/issues if it is not already reported there.