Hi,
The logs didn't directly answer my question as they lacked the chain of
calls, but I believe I figured out the reason. Please try
https://github.com/OSGeo/gdal/pull/8865
Even
Le 29/11/2023 à 02:56, Fengting Chen a écrit :
The attached are two output logs with debug on. You can see that the
output from GDAL 3.7 has two extra queries at the beginning. These
queries only happen when the eAccess is GA_ReadOnly. The logs are
generated with the same command parameters to gdal_translate.
*From: *Even Rouault <even.roua...@spatialys.com>
*Date: *Tuesday, November 28, 2023 at 6:36 PM
*To: *Fengting Chen <fengting.c...@oracle.com>,
gdal-dev@lists.osgeo.org <gdal-dev@lists.osgeo.org>
*Subject: *[External] : Re: [gdal-dev] GDAL driver Open() calls
Hi,
Please share the stack trace (on a debug build) of both instances
where GDALOpen() is called
Even
Le 28/11/2023 à 23:40, Fengting Chen via gdal-dev a écrit :
Hi,
I noticed from the GeoRaster driver that in GDAL 3.6 and 3.7
(maybe 3.8 too), there are two GDALOpen() calls on the driver
with GDALOpenInfo eAccess as GA_ReadOnly, even when the GeoRaster
is the output format in gdal_translate command. There are no such
calls in GDAL 3.4. I am wondering if these invocations of Open()
with eAccess as GA_ReadOnly are necessary when the driver is the
output driver. This has caused performance issue for the GeoRaster
driver when a user is trying to load the data into Oracle database
because it has two unnecessary reads from the database. If these
Open() calls are unavoidable, how to differentiate the calls
whether it is as input or as output in the gdal_translate command?
Thanks.
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