title: Can the foreign data wrapper fdw_postgres handle the GEOMETRY data type of PostGIS?
body: <p>I am accessing data from a different DB via <em>fdw_postgres</em>. It works well:</p>
  
  <pre><code>CREATE FOREIGN TABLE fdw_table 
  (
    name TEXT,
    area double precision,
    use TEXT,
    geom GEOMETRY
  )
  SERVER foreign_db 
  OPTIONS (schema_name 'schema_A', table_name 'table_B')
  </code></pre>
  
  <p>However, when I query for the <code>data_type</code> of the fdw_table I get the following result:
  <code>
  name   text 
  area   double precision
  use    text
  geom   USER-DEFINED</code></p>
  
  <p>Can <em>fdw_postgres</em> not handle the GEOMETRY data type of PostGIS? What does USER-DEFINED mean in this context?</p>