Processing (gdal) dissolve polygon fails

[qgib]

Author Name: matteo ghetta (@ghtmtt)
Original Redmine Issue: 16122
Affected QGIS version: master
Redmine category:processing/ogr
Assignee: Victor Olaya

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with test data (dissolve_polys, polys, multypolys) the algorithm always fails. This the error:

GDAL command output:
Warning 6: Normalized/laundered field name: 'ST_Union('geometry')' to 'ST_Union(''
Converting outputs
Loading resulting layers

The following layers were not correctly generated.
Dissolved
You can check the log messages to find more information about the execution of the algorithm

[qgib]

Author Name: Alexander Bruy (@alexbruy)

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Fixed in changeset "44698d4576d474740cbea8b1955d7ba9f9de27f9".

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• status_id was changed from Open to Closed

[qgib]

Author Name: Giovanni Manghi (@gioman)

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• status_id was changed from Closed to In Progress
• category_id was changed from Processing/GRASS to Processing/OGR

[qgib]

Author Name: Giovanni Manghi (@gioman)

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This is error

Warning 6: Normalized/laundered field name: 'ST_Union('geometry')' to 'ST_Union(''

is an ogr2ogr problem and not a qgis one.

It only happens when dissolving using a text attribute and one of the features has 0 area and the attribute empty, as it happens for one of the features in the dissolve_polys sample data.

Is definitely a edge case, that must be addressed upstream.

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• resolution was changed from to invalid
• status_id was changed from In Progress to Closed

[qgib]

Author Name: Paolo Cavallini (@pcav)

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Could you please open a ticket upstream?
Thanks.