Operator && does not detect mixed SRIDs

[darkblueb]

given:

• function ST_GeomFromEWKT() creates binary geometry with the SRID "baked-in"
• ST_Intersects() detects, warns and fails on params with mixed SRIDs

select st_intersects( st_geomfromEWKT('SRID=4326;POINT(1 2)'), st_geomfromEWKT('SRID=3310;MULTIPOLYGON( 
((0 0, 10 0, 10 10, 0 10, 0 0)) )' ));

ERROR:  Operation on mixed SRID geometries
CONTEXT:  SQL function "st_intersects" statement 1

but, the && operator does not warn, and incorrectly succeeds, on mixed SRID geometry

select st_geomfromEWKT('SRID=4326;POINT(1 2)')   && st_geomfromEWKT('SRID=3310;MULTIPOLYGON( ((0 0, 10 0
, 10 10, 0 10, 0 0)) )' );

 ?column? 
----------
 t
(1 row)

tested on versions 2.0 and 2.1 trunk

[robe]

This has always been an issue from the beginning of time and not one that is easy to fix. Boxes simply don't have srids so to add a check like that would significantly slow things down. && work on the boxes of geometries and in fact usually just touch the index if there is one and rarely the geometry.