Hi all We found different behaviors in qgsorgprovider and qgsspatialiteprovider regarding the field with the type double. In `QgsSpatiaLiteProvider::convertField` it's set to -1 when it's 0 : [https://github.com/qgis/QGIS/blob/master/src/providers/spatialite/qgsspatialiteprovider.cpp#L82-L88](https://github.com/qgis/QGIS/blob/master/src/providers/spatialite/qgsspatialiteprovider.cpp#L82-L88) That's why I decided to change it in `QgsSpatiaLiteProvider::loadFieldsAbstractInterface` as well. The advantage would be, that we could recognize a field with type double when the precision is not zero. But when I checked qgsorgprovider, in `QgsOgrProvider::convertField` the precision is not set (stays what it is) in case of double: [https://github.com/qgis/QGIS/blob/master/src/providers/ogr/qgsogrprovider.cpp#L143-L145](https://github.com/qgis/QGIS/blob/master/src/providers/ogr/qgsogrprovider.cpp#L143-L145) I wonder why it's different and I ask you, if you mind, when we just set the precision in any case to -1 when it's a double value and it's not specified (means 0)? Thanks Dave
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