Question

我正在尝试使用JDBC将XMLType列读入Clob类型变量。当我这样做时，我收到了一个错误....任何想法？

java.sql.SQLException: Invalid column name
    at oracle.jdbc.driver.SQLStateMapping.newSQLException(SQLStateMapping.java:70)
    at oracle.jdbc.driver.DatabaseError.newSQLException(DatabaseError.java:131)
    at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:197)
    at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:261)
    at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:269)
    at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:490)
    at oracle.jdbc.driver.OracleStatement.getColumnIndex(OracleStatement.java:3353)
    at oracle.jdbc.driver.OracleResultSetImpl.findColumn(OracleResultSetImpl.java:1883)
    at oracle.jdbc.driver.OracleResultSet.getClob(OracleResultSet.java:358)
    at persistance.FilmDAO.findFilmsWithXML(FilmDAO.java:626)

这是我的代码：

public ArrayList<FilmBean> findFilmsWithXML() throws SQLException {

        ArrayList<FilmBean> filmList = new ArrayList<FilmBean>();

        try {
            currentConnection = ConnectionPool.getInstance().getConnection();

            String searchQuery = SqlHelper.getInstance().getSqlQuery(705);

            System.out.println("Query: " + searchQuery);

            currentStatement = currentConnection.prepareStatement(searchQuery);

            currentResultSet = currentStatement.executeQuery();

            while (currentResultSet.next()) 
            {
                FilmBean filmDTO = new FilmBean();
                filmDTO.setFilmId(Integer.parseInt(currentResultSet.getString("PK_ID_FILM")));
                filmDTO.setPoster(currentResultSet.getString("POSTER"));
                filmDTO.setTitle(currentResultSet.getString("TITLE"));
                filmDTO.setXml(currentResultSet.getClob("MYXML"));
                filmList.add(filmDTO);
            }
        }
        [...]
    }

setXml()方法将Clob类型值设置为模型中的filmDTO对象。

修改

查询缺少别名：

SELECT to_clob("MYXML") As MYCLOB, PK_ID_FILM, POSTER, TITLE FROM FILM Where MYXML is not null

Answer 1

您在to_clob(XMLElement("MYXML"))之后缺少别名。查询中不存在MYXML列。

使用JDBC读取oracle DB中的XMLType列

1 个答案: