Spring Boot query does not return records

Question

I am developing a system with Java 8 and Spring Boot with JDBC accessing an Oracle base. When I do a query, using Namedparameterjdbctemplate, it does not return any record, but if I copy this same query and do a direct search in the Oracle client, the records return normally. Follow the search method:

    public Optional<Objeto> busca(String campo4, String campo3, String campo2) {
        StringBuilder sql = new StringBuilder();
        sql.append("SELECT CAMPO_1,                          ");
        sql.append("  CAMPO_2,                               ");
        sql.append("  CAMPO_3,                               ");
        sql.append("  CAMPO_4,                               ");
        sql.append("  CAMPO_5,                               ");
        sql.append("  CAMPO_6                                ");
        sql.append("FROM TABELA_DO_BANCO                     ");
        sql.append("                WHERE CAMPO_4 = :pCampo4 ");
        sql.append("                AND CAMPO_2 = :pCampo2   ");
        sql.append("                AND CAMPO_3 = :pCampo3   ");

        return this.namedParameterJdbcTemplate.query(sql.toString(), new MapSqlParameterSource()
            .addValue("pCampo4", campo4, Types.INTEGER)
            .addValue("pCampo2", campo2)
            .addValue("pCampo3", campo3)
                            , new ObjetoRowMapper())
                .stream().findFirst();
}

Follows the description of the database:

I believe the problem lies in WHERE with the countryside CAMPO_2, because when I remove it from the query, the system returns the expected records. Does anyone have any idea what it is? Has anyone gone through it?

Hugs.