protected Blob getBlob (ResultSet rs, Integer columnIndex) throws SQLException {
        try {
            return rs.getBlob(columnIndex);
        } catch (SQLFeatureNotSupportedException e) {
            return null;
        }
    }
Catch the exception SQLFeatureNotSupportedException getting a Blob from some databases
@param rs the resultset
@param columnIndex the column index
@return
@throws SQLException
src/main/java/org/replicadb/manager/SqlManager.java