On Monday, June 7, 2021, Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com> wrote:
> I'm guessing qt5-5.12.8 is not recent enough to deal with the changes in
> Postgres 11+. You might want to ask this on the Qt list(s). I have tried to
> determine this, but the Qt repo structure is lets say interesting and I
> can't find any relevant information.
https://code.qt.io/cgit/qt/qtbase.git/log/src/plugins/sqldrivers/psql/qsql_psql.cpp
The version 12 compatibility commit was done in 5.15 only (5.12 works up to
v11).
David J.