Name
= — Returns TRUE if A's bounding box is the same as B's. Uses double precision bounding box.
Synopsis
boolean =( raster A , raster B );
Descrizione
The = operator returns TRUE if the bounding box of raster A is the same as the bounding box of raster B. PostgreSQL uses the =, <, and > operators defined for rasters to perform internal orderings and comparison of rasters (ie. in a GROUP BY or ORDER BY clause).
![[Caution]](../images/caution.png)
|
|
|
This operand will NOT make use of any indexes that may be available on the rasters. Use ~= instead. This operator exists mostly so one can group by the raster column. |
Disponibilità: 2.1.0