very helpful, thank you very much. Quite a bit more to it than I thought. Best, Mike
On Tue, Aug 2, 2022 at 7:27 PM Rahkonen Jukka < jukka.rahko...@maanmittauslaitos.fi> wrote: > Hi, > > > > About INDIRECT_SQLITE dialect, it is documented in > https://gdal.org/user/sql_sqlite_dialect.html > > “If the datasource is SQLite database (GeoPackage, SpatiaLite) then SQLite > dialect acts as native SQL dialect and Virtual Table Mechanism is not used. > It is possible to force GDAL to use Virtual Tables even in this case by > specifying “-dialect INDIRECT_SQLITE”. This should be used only when > necessary, since going through the virtual table mechanism might affect > performance.” > > There is also an usage example for one special use case. > > > > ES is documented in https://gdal.org/drivers/vector/elasticsearch.html. > > MONGO_DB is documented in https://gdal.org/drivers/vector/mongodbv3.html. > > > > -Jukka Rahkonen- > > > > *Lähettäjä:* gdal-dev <gdal-dev-boun...@lists.osgeo.org> *Puolesta *Michael > Sumner > *Lähetetty:* tiistai 2. elokuuta 2022 10.43 > *Vastaanottaja:* gdal-dev <gdal-dev@lists.osgeo.org> > *Aihe:* [gdal-dev] determine default SQL dialect > > > > Is it possible to determine the default SQL dialect that will be used in > the C++ API? > > > > It seems like the logic to pivot on dialect choice is only available to > drivers internally (they know if they have one), so a map of formats is > enough - but I wonder if I'm missing an API hook. > > > > Also, there appears to be dialect values DEBUG, INDIRECT_SQLITE, MONGO_DB, > and ES in use but I gather they are for internal use (and so properly don't > appear in the documentation). > > > > Thanks very much, Mike > > > > > -- > > Michael Sumner > Software and Database Engineer > Australian Antarctic Division > Hobart, Australia > e-mail: mdsum...@gmail.com > -- Michael Sumner Software and Database Engineer Australian Antarctic Division Hobart, Australia e-mail: mdsum...@gmail.com
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