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I already asked about this topic, but I am still struggling. I created a geopackage with railways of Germany. I need to filter some sections out. I understand that geopackages work with SQL syntax for filtering. But when I use syntax I looked up, QGIS is not doing what its supposed to do.

enter image description here

I just want the railways without the tunnels. I used "tunnel" IS NULL;.

It is successful. No warning is displayed, but all the railways are gone. I use the filter function of the layer. no the query builder. enter image description here

What do I have to change?

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    If the test is successful then the features should appear also on the map, but try if "tunnel" NOT LIKE 'yes' makes any difference.
    – user30184
    Aug 2, 2022 at 11:29

1 Answer 1

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It sounds like a bug.

If you enter "tunnel" IS NULL;, with an ending ;, and click the test button, it will show the number of features that should be found, but QGIS won't display them

If you remove the ending ;, then everything works fine.

PS: I see this under 3.16

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