Name
ST_AsBinary/ST_AsWKB — Return the Well-Known Binary (WKB) representation of the raster.
Synopsis
bytea ST_AsBinary(raster rast, boolean outasin=FALSE);
bytea ST_AsWKB(raster rast, boolean outasin=FALSE);
Descripción
Returns the Binary representation of the raster. If outasin is TRUE, out-db bands are treated as in-db. Refer to raster/doc/RFC2-WellKnownBinaryFormat located in the PostGIS source folder for details of the representation.
This is useful in binary cursors to pull data out of the database without converting it to a string representation.
![[Note]](../images/note.png)
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By default, WKB output contains the external file path for out-db bands. If the client does not have access to the raster file underlying an out-db band, set |
Enhanced: 2.1.0 Addition of outasin
Enhanced: 2.5.0 Addition of ST_AsWKB
Ejemplos
SELECT ST_AsBinary(rast) As rastbin FROM dummy_rast WHERE rid=1;
rastbin
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\001\000\000\000\000\000\000\000\000\000\000\000@\000\000\000\000\000\000\010@\000\000\000\000\000\000\340?\000\000\000\000\000\000\340?\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\012\000\000\000\012\000\024\000