This topic describes the ST_Extrude function. This function extrudes a 2D polygon into a 3D model along the positive direction of the z-axis.
Syntax
meshgeom ST_Extrude(geometry geom2d, float8 height);Parameters
| Parameter | Description |
|---|---|
| geom2d | The geometry object, which can be of the Polygon or MultiPolygon type. |
| height | The height. |
Description
This function extrudes a 2D polygon into a 3D model along the z-axis.
Effect diagram
A 2D polygon is extruded along the z-axis. 
Examples
SELECT ST_AsText(ST_Extrude('POLYGON((0 0, 1 0, 1 1, 0 0))', 1));
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MESHGEOM(PATCH(POLYGON Z ((0 0 1,1 0 1,1 1 1,0 0 1)),TRIANGLESTRIP Z (0 0 1,0 0 0,1 0 1,1 0 0,1 1 1,1 1 0,0 0 1,0 0 0),POLYGON Z ((0 0 0,1 1 0,1 0 0,0 0 0))))