title: convert normal column as partition column in hive
body: <p>I have a table with 3 columns. now i need to modify one of the column as a partition column.
  Is there any possibility? If not, how can we add partition to existing table. I used the below syntax:
  create table t1 (eno int, ename string ) row format delimited fields terminated by '\t';
  load data local '/....path/' into table t1;
  <strong>alter table t1 add partition (p1='india');</strong></p>
  
  <p>i am getting errors.........</p>
  
  <p>Any one know how to <strong>add partition to existing table</strong>......?</p>
  
  <p>Thanks in advance.</p>