title: Postgres "ERROR: invalid byte sequence for encoding "UTF8": 0xa0" occurred while dumpimg csv
body: <p>I got </p>
  
  <blockquote>
    <p>ERROR:  invalid byte sequence for encoding "UTF8": 0xa0"</p>
  </blockquote>
  
  <p>while dumpimg csv to table, no record was inserted in the table but size of table and database got increased. How does that happen and is there any way to reduce it? Thanks.</p>