Document that ALTER TABLE .. TYPE removes statistics

Co-authored-by: Nikolai Berkoff <nikolai.berkoff@pm.me> Discussion: https://postgr.es/m/vCc8XnwDmlP4ZnHBQLIVxzD405BiYHVC9qZlhIF7IsfxK0gC9mZ4PUUOH0-3y6kv5p-87-3_ljqT1KvQVAnb8OoWhPU3kcqWn2ZpmxRBCQg=@pm.me
4 years ago · df80f9da5c
parent 105c1de019
commit df80f9da5c
1 changed files with 6 additions and 0 deletions
--- a/doc/src/sgml/ref/alter_table.sgml
+++ b/doc/src/sgml/ref/alter_table.sgml
@ -198,6 +198,12 @@ WITH ( MODULUS <replaceable class="parameter">numeric_literal</replaceable>, REM
      clause must be provided if there is no implicit or assignment
      cast from old to new type.
     </para>
+
+     <para>
+      When this form is used, the column's statistics are removed,
+      so running <link linkend="sql-analyze"><command>ANALYZE</command></link>
+      on the table afterwards is recommended.
+     </para>
    </listitem>
   </varlistentry>