protected void addAllCharacters(String s, ContentHandler handler) throws SAXException {
        if (s == null) {
            return;
        }
        char[] chars = s.toCharArray();
        handler.characters(chars, 0, chars.length);
    }
@param resultSet   result set to grab value from
@param columnIndex index in result set
@param metadata    metadata to populate or use for each implementation
@return the blob or <code>null</code> if the value was null
@throws SQLException
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-jdbc-commons/src/main/java/org/apache/tika/parser/jdbc/JDBCTableReader.java