/** @return {@code true} If next row was fetched successfully. */
private boolean fetchNext() {
if (data == null) return false;
try {
if (!data.next()) return false;
for (int c = 0; c < row.length; c++) row[c] = data.getObject(c + 1);
return true;
} catch (SQLException e) {
throw new IgniteException(e);
}
}
