Le 02/08/2022 à 09:42, Michael Sumner a écrit :
Is it possible to determine the default SQL dialect that will be used
in the C++ API?
Short answer: no
Long answer: for a driver that is backed by a SQL engine (SQLite, GPKG,
PG, MySQL, OCI, etc.), it will default to the RDBMS SQL engine,
otherwise to OGR SQL.
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).
DEBUG is clearly for internal use (autotest). INDIRECT_SQLITE is
documented at
https://gdal.org/user/sql_sqlite_dialect.html?highlight=indirect_sqlite.
The others are documented in the respective documentation driver pages
Even
--
http://www.spatialys.com
My software is free, but my time generally not.
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