Date 2021/01/10
Author Even Rouault (@rouault)
Version QGIS 3.18
Summary
Remove the DB2 provider from the code base
Rationale
QGIS just got a new proprietary-based provider with the HANA provider, so for balance, let's get rid of
an existing one.
The original committer of the DB2 provider hasn't been active for more than 2 years,
and all activity in the provider since then has been, as far as I can see,
forced maintenance, due to changes elsewhere in the code base.
https://github.com/qgis/QGIS/issues?q=is%3Aissue+db2 shows that only one ticket
has been created specifically regarding the DB2 provider. This is either a sign
it is of the highest quality, but more realisticly than hardly anybody is using it,
otherwise there would be feature requests regarding it.
IBM isn't a sustaining member of QGIS.org, so it is hard to justify maintenance costs due to it.
Backwards Compatibility
Breaks users of the functionality
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