[Qgis-user] Filtering layer or selected features by attributes does not work for new added features in QGIS 3.22.8

[Tudorache, Marian]

Hi Andrea,

I asked permission to share these coverage files with you and the company cannot do this because the data belongs to ESRI and we are only the users of the data.
But I removed these files .idm and and .ind and everything is fine.
Thank you.

I have one more observation.
When I converted the data from coverage to shapefile using QGIS2.18 the geometries were simple parts. For example to extract the points from an arc layer I had to use arc.geometry().asPolyline()
The shapefiles were under a QGIS project (.qgs).
When I open the QGIS project created with QGIS2.18 I got a message which notify me the project is an old version of QGIS and some conversion was done.

When I ran some algorithm which tried to arc.geometry().asPolyline() I got this error.
Traceback (most recent call last):
  File "/usr/lib64/python3.9/code.py", line 90, in runcode
    exec(code, self.locals)
  File "<input>", line 1, in <module>
TypeError: MultiLineString geometry cannot be converted to a polyline. Only single line or curve types are permitted.

So when I open QGIS 2.18 project something happened with the data and was transformed from LineString to MultiLineString.
Is this normal behaviour for QGIS 3 to convert the geometry type from single part to multiple parts?
Is any method to supress this transformation?

Thank you,
Marian


From: Qgis-user <qgis-user-bounces at lists.osgeo.org> On Behalf Of Andrea Giudiceandrea via Qgis-user
Sent: July 25, 2022 5:12 AM
To: qgis-user at lists.osgeo.org
Subject: [EXT] Re: [Qgis-user] Filtering layer or selected features by attributes does not work for new added features in QGIS 3.22.8

Tudorache, Marian Sun Jul 24 11:⁠​14:⁠​30 PDT 2022 How these .⁠​idm and and .⁠​ind files were created? These files are created by reading ESRI coverage data used in an application under ArcInfo:⁠​ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍

Tudorache, Marian
Sun Jul 24 11:14:30 PDT 2022
________________________________

How these .idm and and .ind files were created?

These files are created by reading ESRI coverage data used in an application under ArcInfo:

Hi Marian,
could you share a link to a sample of such ESRI coverage data file for which the conversion to a Shapefile layer creates the .idm and and .ind attributes indexes sidecar files?




Cab these file be recreated without knowing?

Looking at the QGIS code, it seems such attributes indexes sidecar files could be unknowingly created if the user uses the Shapefile layer in a join (via layer Property->Joins) enabling the "Create attribute index on join field" option.
An user can also directly create attributes indexes using the "Create attribute index" processing algorithm, or e.g. using the GDAL/OGR "ogrinfo" command [1] [2], or using a Python script, or ... .

Best regards.

Andrea


[1] https://gdal.org/drivers/vector/shapefile.html#spatial-and-attribute-indexing<https://urldefense.com/v3/__https:/gdal.org/drivers/vector/shapefile.html*spatial-and-attribute-indexing__;Iw!!P0kg3YazkQ!GzcCr3gac6KvyF6_O4cFbtPNlfuLIWHcHkhpM9nUVcW6hOYUC0_rFXJb3kpv7_1gSi8fXst9eGF6z5HWfW_38p3bmwrYD-E$>
[2] https://gdal.org/user/ogr_sql_dialect.html#create-index<https://urldefense.com/v3/__https:/gdal.org/user/ogr_sql_dialect.html*create-index__;Iw!!P0kg3YazkQ!GzcCr3gac6KvyF6_O4cFbtPNlfuLIWHcHkhpM9nUVcW6hOYUC0_rFXJb3kpv7_1gSi8fXst9eGF6z5HWfW_38p3bgfrbURg$>

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