Importing .shp to PostgreSQL?

ERROR: **function addGeometrycolumn**(unknown, unknown, unknown, unknown,unknown, integer) does not exist

It seems that PostGIS is not yet installed. PostGIS is an extension of Postgres which allows the use of geographic files.

Install it and your import will work fine.

The ERROR: function addGeometrycolumn(unknown, unknown, unknown, unknown,unknown, integer) does not exist means that the postgis extension is not installed on your postgresql. Go here and install it.