PostGIS

postgis.gdal_enabled_drivers

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8.23. Grand Unified Custom Variables (GUCs)

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postgis.gdal_enabled_drivers — A configuration option to set the enabled GDAL drivers in the PostGIS environment. Affects the GDAL configuration variable GDAL_SKIP.

Description

A configuration option to set the enabled GDAL drivers in the PostGIS environment. Affects the GDAL configuration variable GDAL_SKIP. This option can be set in PostgreSQL’s configuration file: postgresql.conf. It can also be set by connection or transaction.

The initial value of postgis.gdal_enabled_drivers may also be set by passing the environment variable POSTGIS_GDAL_ENABLED_DRIVERS with the list of enabled drivers to the process starting PostgreSQL.

Enabled GDAL specified drivers can be specified by the driver’s short-name or code. Driver short-names or codes can be found at GDAL Raster Formats. Multiple drivers can be specified by putting a space between each driver.

Note

There are three special codes available for postgis.gdal_enabled_drivers. The codes are case-sensitive.

  • DISABLE_ALL disables all GDAL drivers. If present, DISABLE_ALL overrides all other values in postgis.gdal_enabled_drivers.

  • ENABLE_ALL enables all GDAL drivers.

  • VSICURL enables GDAL’s /vsicurl/ virtual file system.

When postgis.gdal_enabled_drivers is set to DISABLE_ALL, attempts to use out-db rasters, ST_FromGDALRaster(), ST_AsGDALRaster(), ST_AsTIFF(), ST_AsJPEG() and ST_AsPNG() will result in error messages.
Note

In the standard PostGIS installation, postgis.gdal_enabled_drivers is set to DISABLE_ALL.
Note

Additional information about GDAL_SKIP is available at GDAL’s Configuration Options.

Availability: 2.2.0

Examples

Set and reset postgis.gdal_enabled_drivers

Sets backend for all new connections to database

ALTER DATABASE mygisdb SET postgis.gdal_enabled_drivers TO 'GTiff PNG JPEG';

Sets default enabled drivers for all new connections to server. Requires super user access and PostgreSQL 9.4+. Also note that database, session, and user settings override this.

ALTER SYSTEM SET postgis.gdal_enabled_drivers TO 'GTiff PNG JPEG';
SELECT pg_reload_conf();
SET postgis.gdal_enabled_drivers TO 'GTiff PNG JPEG';
SET postgis.gdal_enabled_drivers = default;

Enable all GDAL Drivers

SET postgis.gdal_enabled_drivers = 'ENABLE_ALL';

Disable all GDAL Drivers

SET postgis.gdal_enabled_drivers = 'DISABLE_ALL';

See Also

ST_FromGDALRaster, ST_AsGDALRaster, ST_AsTIFF, ST_AsPNG, ST_AsJPEG, postgis.enable_outdb_rasters

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