title: Refer to column/table names using strings?
body: <p>is it possible to refer to a column/table name by using a string? Something like <code>SELECT * FROM 'my_table'::table_name_t</code>?</p>
  
  <p>The reason I'm asking: I have a table geometry_columns with some geometry tables. And I would like to know which objects are within a certain radius.</p>
  
  <p>Thanks, Philip</p>