Rollback operations slow if lots of features changed

[qgib]

Author Name: Matthias Kuhn (@m-kuhn)
Original Redmine Issue: 9519
Affected QGIS version: master
Redmine category:vectors

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To reproduce:

• Open a layer with a big amount of features (...and with a slow backend)
• Start editing
• Open the field calculator
• Create a new column (e.g. "rand( 1, 10 )" )
• Stop editing without saving changes

It takes a long time to undo this command and QGIS freezes during this time. As far as I can tell, there are feature requests made for every single feature which was updated before (so all in the case mentioned above).
I could imagine a possible approach would be to batch undo the affected rows and perform a single request with setFilterFids() to still only request the required rows, but with less roundtrips.

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Related issue(s): #17922 (relates), #18100 (duplicates)
Redmine related issue(s): 9315, 9509

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[qgib]

Author Name: Jürgen Fischer (@jef-n)

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duplicate of #18100?

[qgib]

Author Name: Matthias Kuhn (@m-kuhn)

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I think so. Closing as duplicate.

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• resolution was changed from to duplicate
• status_id was changed from Open to Closed