cx_Oracle.InterfaceError: Unable to acquire Oracle environment handle 解决方案

约定不等于承诺〃 2022-12-07 01:20 201阅读 0赞

环境信息：

python：2.7.9 windows 64位

cx\_Oracle: 5.3 - 11g windows64位

oracle：11g windows64位

环境变量配置：

ORACLE_HOME=F:\oracleclient\x64\instantclient-basic-windows.x64-11.2.0.4.0\instantclient_11_2/
    
    PATH=%PATH%;%ORACLE_HOME%

测试代码：

import cx_Oracle      
    import os
    os.environ['NLS_LANG'] = 'SIMPLIFIED CHINESE_CHINA.UTF8'
    
    #导入模块
    if __name__ == '__main__':
        # con = cx_Oracle.connect('scott', 'tiger', '192.168.1.243/SCOTT')  #创建连接
        print(os.getcwd())
        ip = "192.168.1.1"
        port = "1521"
        dbname = "SCOTT"
        sid = "GLOBLE"
        dsn = "(DESCRIPTION =(ADDRESS = (PROTOCOL = TCP)(HOST = "+ip+")(PORT = "+port+"))(CONNECT_DATA =(SID = "+sid+")))"
        user = "scott"
        password = "tiger"
        con = cx_Oracle.connect(user, password, dsn, encoding="UTF-8")
        cursor = con.cursor()       #创建游标
        cursor.execute( "SELECT HJ_ID,HJ_FILEPATH FROM DMYD_VOLTE_VOICE_DATA.HJ_FILEPATH")  #执行sql语句
        data = cursor.fetchone()        #获取一条数据
        print(data)     #打印数据
        cursor.close()  #关闭游标
        con.close()     #关闭数据库连接

报错信息：

Traceback (most recent call last):
      File "main.py", line 17, in <module>
        con = cx_Oracle.connect(user, password, dsn, encoding="UTF-8")
    cx_Oracle.InterfaceError: Unable to acquire Oracle environment handle

分析与解决：

网上大部分解决方案：将Instant Client Package中的dll全部拷贝至 D:\\Python27\\Lib\\site-packages目录下。我拷过去并没有什么用。

觉得有可能是接口不兼容，于是我尝试换了个cx\_Oracle版本：cx\_Oracle-5.2-11g。然后就可以了。

参考文章：

[Python连接Oracle][Python_Oracle]

[cx-Oracle下载地址][cx-Oracle]

[oracle-client官网][oracle-client]

[Python_Oracle]: https://www.jianshu.com/p/f449b5199178
[cx-Oracle]: https://pypi.org/project/cx-Oracle/5.2/#files
[oracle-client]: https://www.oracle.com/database/technologies/instant-client/downloads.html