postgis.gdal_cpl_debug — A boolean configuration to turn logging of GDAL debug messages on and off.
By default, GDAL logging is printed to stderr, and lower level debug messages are not printed at all. Turning this GUC to true will cause detailed GDAL logging to be sent into the PostgreSQL server log. PostgreSQL clients receive only generic GDAL notice, debug, warning, or error messages.
Availability: 3.6.0