Answer by Shu for TTL for Hbase Tables works on Column Qualifier and does not delete updated Columns

If you define TTL on columnfamily level while creating table

(or)

By using alter command, then we are able to delete entire row from HBase.

Example:

1. Creating table with TTL:

hbase(main):> create 'ttl_tbl', {'NAME' => 'cf','TTL' => 20} //all rows will expire after 20 secs
hbase(main):> put 'ttl_tbl','row1','cf:desc', 'TTL shu'
hbase(main):> put 'ttl_tbl','row1','cf:desc1', 'TTL shu'
hbase(main):> scan 'ttl_tbl'
ROW                                                    COLUMN+CELL
 row1                                                  column=cf:desc, timestamp=1562101913869, value=TTL shu
 row1                                                  column=cf:desc1, timestamp=1562101914445, value=TTL shu

After 20 secs:

hbase(main):009:0> scan 'ttl_tbl'
ROW                                                    COLUMN+CELL
0 row(s)

2. Creating table without TTL:

hbase(main):010:0> create 'ttl_tbl1','cf'
hbase(main):011:0> put 'ttl_tbl1','row1','cf:desc','TTL shu',{TTL => 10000} //this row will be deleted after 10 sec as TTL on qualifier is in milliseconds

hbase(main):012:0> put 'ttl_tbl','row1','cf:desc1', 'TTL shu' //no ttl will not be deleted.