Hi Michele,

Just around the same time that you sent this message (or a day before?) I
spotted and fixed a problem with atom deletion. So, please try rebuilding
and reinstalling the atomspace.  (git pull; cd build; make -j; sudo make
install) -- let me know if that solves the problem.

Note also, the proper name is cog-delete!  (with an exclamation mark at the
end) I may have removed the backwards-compat layer that allowed it to work
without the exclamation mark..

Note also: there is a RocksDB backend too. It might be easier to use (no
config required). In some synthetic benchmarks, its 2x or 3x faster than
postgres. In the one "real-life" app that I'm using, its 10%-50% slower. Go
figure.  Anyway its at https://github.com/opencog/atomspace-rocks

(There is also a network server backend:
https://github.com/opencog/atomspace-cog ... the README explains more)

-- Linas

On Mon, Mar 8, 2021 at 3:58 AM Michele Thiella <[email protected]>
wrote:

> Goodmorning everyone,
> i have a simple problem about deleting atoms in postgresql.
> According to what I understand, to delete an atom saved in postgres I
> should use:
> (cog-delete (Concept "asdf"))
> The command is successful, the atom is removed from the atomspace but not
> from the postgresql database. Could someone kindly tell me why?
> The prostgresql backend should be configured correctly, according to the
> guide on the wiki ... saving new atoms in the database works.
> Thanks in advance, I apologize for the inconvenience
>
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