DropGeometryColumn
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## Name

DropGeometryColumn — Removes a geometry column from a spatial table.

## Synopsis

`text DropGeometryColumn(`varchar table_name, varchar column_name`)`;

`text DropGeometryColumn(`varchar schema_name, varchar table_name, varchar column_name`)`;

`text DropGeometryColumn(`varchar catalog_name, varchar schema_name, varchar table_name, varchar column_name`)`;

## Description

Removes a geometry column from a spatial table. Note that schema_name will need to match the f_table_schema field of the table's row in the geometry_columns table.

This method implements the OGC Simple Features Implementation Specification for SQL 1.1.

This function supports 3d and will not drop the z-index.

This method supports Circular Strings and Curves

Changed: 2.0.0 This function is provided for backward compatibility. Now that since geometry_columns is now a view against the system catalogs, you can drop a geometry column like any other table column using `ALTER TABLE`

## Examples

    			SELECT DropGeometryColumn ('my_schema','my_spatial_table','geom');
    			----RESULT output ---
    			                  dropgeometrycolumn
    ------------------------------------------------------
     my_schema.my_spatial_table.geom effectively removed.

    -- In PostGIS 2.0+ the above is also equivalent to the standard
    -- the standard alter table.  Both will deregister from geometry_columns
    ALTER TABLE my_schema.my_spatial_table DROP column geom;

## See Also

AddGeometryColumn, DropGeometryTable, Section 4.6.2, “GEOMETRY_COLUMNS View”

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