title: Postgres data compress
body: <p>I am using Postgres ( 12.5 ver on ubuntu OS and it is community edition).
  I am looking for columnstore features in postgres. While creating column store index it is giving me <code>ERROR: access method &quot;columnstore&quot; does not exist</code>.</p>
  <p>Also i am looking for other option like <code>default_table_access_method = zedstore;</code> It is showing the error as listed below
  <code>ERROR:  invalid value for parameter &quot;default_table_access_method&quot;: &quot;zedstore&quot; DETAIL:  Table access method &quot;zedstore&quot; does not exist.</code></p>
  <p>Please can you help me to resolve this issue?</p>