1 files changed, 4 insertions, 0 deletions
diff --git a/webmap-import b/webmap-import
index 6f514a9..f20fdef 100755
--- a/webmap-import
+++ b/webmap-import
@@ -377,6 +377,10 @@ def validateLayerCacheField(defn : ogr.FeatureDefn, idx : int,
 
 def validateCacheLayer(ds : gdal.Dataset, name : str) -> bool:
     """Validate layer cache table."""
+    drvName = ds.GetDriver().ShortName
+    if drvName != 'PostgreSQL': # we need hash_record_extended(), sha256() and ST_AsEWKB()
+        logging.warning('Unsupported cache layer for output driver %s', drvName)
+        return False
     lyr = ds.GetLayerByName(name)
     if lyr is None:
         logging.warning('Table "%s" does not exist', name)