Maxim,
“I assume the driver would depend on the ODBC library, and would require users to build
https://github.com/SAP/odbc-cpp-wrapper
<https://github.com/SAP/odbc-cpp-wrapper>as the corresponding ODBC driver ?”
The odbc-cpp-wrapper library is going to be used only during the
compilation phase and linked statically, thus end users will get only
one dynamic/shared library of the HANA driver. Hence, no additional
actions are required from end users. For those who want to compile the
GDAL sources with HANA support on their own, the sources of the
odbc-cpp-wrapper are needed. However, this step can be omitted if we
store a copy of the library in
https://github.com/OSGeo/gdal/tree/master/gdal/third_party
<https://github.com/OSGeo/gdal/tree/master/gdal/third_party>like we
did in QGIS (see
https://github.com/qgis/QGIS/tree/master/external/odbccpp
<https://github.com/qgis/QGIS/tree/master/external/odbccpp>).
I can anticipate potential issues if both GDAL and QGIS have a odbcpp
vendorized copy, and that for some reason they differ in versions. That
could cause symbol clashes at runtime. Putting the vendorized copy in a
dedicated namespace prefix (GDAL::) could avoid that.
Otherwise, isn't the cpl_odbc.h abstraction good enough ?
Side note: are you aware of https://github.com/nanodbc/nanodbc that is
also a C++ wrapper for ODBC ? (Mateusz one of our PSC members was the
main developer of it, although I believe he has retired from it)
Note, that any HANA plugin (GDAL/QGIS) also requires the SAP HANA
Client (https://tools.hana.ondemand.com/#hanatools) to be able to
connect an SAP HANA database.
Is that the ODBC driver for SAP HANA ?
Unfortunately, we are not able to answer the remaining raised
pointsas they are beyond our expertise.
Perhaps they should be addressed in a separate dedicated discussion.
Well, if you contribute to GDAL, then that should be in your area of
interest and concern :-)
I think the main practical issue for this to go forward is for you to
find someone who would want to review your contribution.
Another option is to propose the OGR SAP HANA driver as a plugin for
download from your website.
Even
--
http://www.spatialys.com
My software is free, but my time generally not.
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