Extensions
Scalar Functions
Forces the vertices of a geometry to have X, Y and Z components  
The following cases apply:  
* If the input geometry has a M component but no Z component, the M component will be replaced with the new Z value.
* If the input geometry has a Z component but no M component, it will be returned as is.
* If the input geometry has both a Z component and a M component, the M component will be removed.
* Otherwise, if the input geometry has neither a Z or M component, the new Z value will be added to the vertices of the input geometry.  
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#### ST_Force4D {#docs:extensions:spatial:functions::st_force4d}