code: public void clearUserMeta(final long userId) throws SQLException {
        Connection conn = null;
        PreparedStatement stmt = null;
        Timer.Context ctx = metrics.clearUserMetaTimer.time();
        try {
           conn = connectionSupplier.getConnection();
           stmt = conn.prepareStatement(deleteUserMetaSQL);
           stmt.setLong(1, userId);
           stmt.executeUpdate();
        } finally {
           ctx.stop();
           SQLUtil.closeQuietly(conn, stmt);
        }
     }
docs: Clears all metadata for a user.
  @param userId The user id.
  @throws SQLException on database error.