&&(box2df,geometry) — Returns TRUE if a 2D float precision bounding box (BOX2DF) intersects a geometry's (cached) 2D bounding box.
boolean &&( box2df  A ,  geometry  B );
The && operator returns TRUE if the 2D bounding box A intersects the cached 2D bounding box of geometry B, using float precision. This means that if A is a (double precision) box2d, it will be internally converted to a float precision 2D bounding box (BOX2DF)
                 
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                 This operand is intended to be used internally by BRIN indexes, more than by users.  | 
            
Availability: 2.3.0 support for Block Range INdexes (BRIN) was introduced. Requires PostgreSQL 9.5+.
            
 Questo metodo supporta le Curve e le Circular String. 
            
 Questa funzione supporta le Polyhedral Surface. 
SELECT ST_MakeBox2D(ST_Point(0,0), ST_Point(2,2)) && ST_Point(1,1) AS overlaps; overlaps ---------- t (1 row)