NikosAlexandris wrote:
Dear list,
where is the extension for SQLite that contains the (mathematical) log
function available to download? As referenced in
https://grass.osgeo.org/grass73/manuals/v.db.update.html.
Helmut Kudrnovsky:
I think the reference in the manual requires a source or a link to it.
just found something in the wiki:
https://grasswiki.osgeo.org/wiki/Build_SQLite_extension_on_windows
For Linux:
gcc extension-functions.c -fPIC -shared -o libextensionfunctions.so
Note,
1) there is still a "compile" warning for the code (no time to hunt)
2) The log() function does not like, naturally, 0 values. But this can
be workedaround with a where SQL clause.
Can we not integrate this into GRASS? It feels awkward to have to spend
so much time for a log or similar function to use in a v.db.update call.
Nikos
with further links to extensions:
https://www.sqlite.org/contrib
yes, this should go into the manual.
any manual diff available?
Not yet.
(
I can't say I didn't search (20+ minutes). There is no related "log"
result that leads to that "contrib" page from within SQLite's page
search field itself! And, in our wiki I admit I did not think about
Windows at all.
)
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