title: Alter table in impala : make a column a primary key
body: <p>Using Hue, how can I alter a table to make a prexisting column a primary key?</p>
  
  <p>I check and things like :</p>
  
  <p><code>ALTER TABLE table_name ADD CONSTRAINT colname PRIMARY KEY (cs_id);</code></p>
  
  <p>is not syntactically correct.</p>
  
  <p>NB: data is stored using Kudu file system.</p>