ST_AsWKB function to return the WKB representation - ApsaraDB RDS

This topic describes the ST_AsWKB function. This function returns the well-known binary (WKB) representation of an object of any type.

Syntax

bytea ST_AsWKB(meshgeom geom);
bytea ST_AsWKB(sfmesh sfmeshObject);
bytea ST_AsWKB(meshgeom geom, cstring endian);
bytea ST_AsWKB(sfmesh sfmeshObject, cstring endian);

Parameters


Parameter	Description
geom	The meshgeom object.
sfmeshObject	The sfmesh object.
endian	The endian. Valid values: NDR: little endian XDR: big endian

Description

This function returns the WKB representation of an object of any type.

Examples

select ST_AsWKB(ST_MeshFromText('{"version" : 1, "root" : 0, "meshgeoms" : ["MESHGEOM(PATCH(INDEXSURFACE Z (VERTEX(0 0 2,0 10 3,10 10 1,10 0 1),INDEX((0,1,2),(1,2,3)))))"], "primitives" : [{"meshgeom" : 0}], "nodes" : [{"primitive" : 0}]}'));

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