expose ST_SRID function in rql

site_cubicweb.py

@@ -260,6 +260,13 @@ class ST_MAKEPOINT(FunctionDescr):
     rtype = 'Geometry'
 
 
+class ST_SRID(FunctionDescr):
+    minargs = 1
+    maxargs = 1
+    supported_backends = ('postgres',)
+    rtype = 'Geometry'
+
+
 class ST_SETSRID(FunctionDescr):
     minargs = 2
     maxargs = 2
@@ -324,6 +331,7 @@ register_function(ST_CONVEXHULL)
 register_function(ST_CONCAVEHULL)
 register_function(ST_MAKEPOINT)
 register_function(ST_SETSRID)
+register_function(ST_SRID)
 register_function(ST_DISTANCE_SPHERE)
 register_function(ST_X)
 register_function(ST_Y)