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Linux 环境 Python 连接 OceanBase(Oracle 模式)完整教程

  • 2026-08-21 13:39:31
Linux 环境 Python 连接 OceanBase(Oracle 模式)完整教程

作者简介叶伟全瑞蓝创数据库工程师

原创内容未经授权不得随意使用,转载请联系小编并注明来源

在企业级数据库开发场景中,OceanBase Oracle 兼容模式凭借稳定的性能、完美的Oracle语法适配能力,被广泛应用于金融、政务、互联网核心业务系统。

而Python作为数据分析、后端开发、自动化运维的主流语言,实现其与OceanBase Oracle模式的稳定连接,是日常开发、数据同步、业务测试的必备技能。

今天给大家带来一套CentOS 7 环境从零搭建的标准实操教程!

实验前置

Q1:关于python环境的选择

A1:根据文档建议是Python 3.7 或更高版本,根据最新的obci版本要求,建议是3.9,或者根据本文选择主流的3.10版本即可

Q2:各文件获取方式和介绍

文件名
文件说明
获取方式
oracle-instantclient12.2-basic-12.2.0.1.0-1.x86_64.rpm
Oracle OCI头文件,obci需要依赖里面的框架
https://www.oracle.com/database/technologies/instant-client/linux-x86-64-downloads.html#tab-id-5de3f833-4511-46de-aa28-a8179e6f6ed7
libobclient-2.2.13-1.el7.x86_64.rpm
连接ob数据库的c语言驱动文件
https://www.oceanbase.com/softwarecenter或者https://github.com/oceanbase/obconnector-c/releases
obci-2.1.1.3-22026051517.el7.x86_64.rpm
兼容oracle/oboracle连接的一套框架
目前只有老版本的obci释出,并没有适配到python环境https://www.oceanbase.com/docs/common-oceanbase-cloud-1000000000095858   需通过工单或者架构师获取

Q3:除了本文的Linux环境下python连接oboracle,Windows下的主流环境是否支持?

A3:有相关的驱动支持的,具体可联系售后或方案架构师。

实验步骤

1、测试环境:Centos7

[root@iZwz9ak4ce2et9ihb25omrZ ~]# cat /etc/system-releaseCentOS Linux release 7.9.2009 (Core)

2、安装python新版本

建议安装前查看系统原有的python相关

python --versionpython2 --versionpython3 --version
[root@iZwz9ak4ce2et9ihb25omrZ ~]# python --versionPython 2.7.5[root@iZwz9ak4ce2et9ihb25omrZ ~]# python2 --versionPython 2.7.5[root@iZwz9ak4ce2et9ihb25omrZ ~]# python3 --versionPython 3.6.8

使用二进制编译安装新一点的python版本

官网二进制下载地址:https://www.python.org/ftp/python/3.10.20/Python-3.10.20.tgz

# 安装目录./configure --enable-optimizations --prefix=/usr/local/python3.10make -j$(nproc)make altinstall
cat >> /etc/profile <<EOFexport PATH=/usr/local/python3.10/bin:$PATHEOFsource /etc/profilesudo ln -s /usr/local/python3.10/bin/python3.10 /usr/local/bin/python3sudo ln -s /usr/local/python3.10/bin/pip3.10 /usr/local/bin/pip3
[root@iZwz9ak4ce2et9ihb25omrZ ~]# pip3 --versionpip 23.0.1 from /usr/local/python3.10/lib/python3.10/site-packages/pip (python 3.10)[root@iZwz9ak4ce2et9ihb25omrZ ~]# python3 --versionPython 3.10.20

2、准备对应的rpm包进行安装

rpm -ivh 

3、设置前面安装好的C动态库的环境变量

cat >> /etc/profile <<EOFexport LD_LIBRARY_PATH=/u01/obclient/lib/:/usr/lib/oracle/12.2/client64/lib/:$LD_LIBRARY_PATHEOFsource /etc/profile

4、开启一个venv的py项目开始测试

python3 -m venv project1cd project1source bin/activate

查看阅读驱动附加的readme信息

(project1) [root@iZwz9ak4ce2et9ihb25omrZ project1]# cat /u01/obclient/python/cx_Oceanbase-6.1.0.tar.gz  cx_Oracle-6.1.0.tar.gz     cx_Oracle-8.3.0.tar.gz     readme.txtcx_Oceanbase-8.3.0.tar.gz  cx_Oracle-7.3.0.tar.gz     oracledb-3.3.0.tar.gz      (project1) [root@iZwz9ak4ce2et9ihb25omrZ project1]# cat /u01/obclient/python/readme.txt obci安装后/u01/obclient/python下面有两个包,cx_Oracle/cx_Oceanbase(代码相同都是用于链接ob oracle)1. 如果应用只链接ob oracle,建议用/u01/obclient/python/cx_Oracle。2. 如果应用同时链接oracle/oboracle,建议用/u01/obclient/python/cx_Oceanbase,然后oracle用原生的cx_Oracle。oracledb3.3.0编译(python3.9以上)pip install cythonpip install setuptools wheellinux:export CFLAGS="-std=c99"windows:set CFLAGS=-std=c99

加载驱动包,这里选择cx_Oracle

(project1) [root@iZwz9ak4ce2et9ihb25omrZ project1]# tar -zxvf /u01/obclient/python/cx_Oracle-8.3.0.tar.gz -C . (project1) [root@iZwz9ak4ce2et9ihb25omrZ project1]# ls -l cx_Oracle-8.3.0/total 60-rwxrwxrwx  1 root root  284 Feb 10  2025 CONTRIBUTING.mddrwxrwxrwx  3 root root 4096 Mar 16 13:34 doc-rwxrwxrwx  1 root root 1841 Apr 15  2024 LICENSE.txt-rwxrwxrwx  1 root root  256 Apr 15  2024 MANIFEST.indrwxrwxrwx 10 root root 4096 Mar 16 13:34 odpi-rwxrwxrwx  1 root root  103 Apr 15  2024 pyproject.toml-rwxrwxrwx  1 root root 2862 Feb 10  2025 README.md-rwxrwxrwx  1 root root  285 Apr 15  2024 README.txtdrwxrwxrwx  4 root root 4096 Mar 16 13:34 samples-rwxrwxrwx  1 root root 1738 Feb 10  2025 SECURITY.md-rwxrwxrwx  1 root root 1121 Apr 15  2024 setup.cfg-rwxrwxrwx  1 root root 2581 Apr  9 15:47 setup.pydrwxrwxrwx  2 root root 4096 Mar 16 13:34 srcdrwxrwxrwx  4 root root 4096 Mar 16 13:34 test-rwxrwxrwx  1 root root  387 Apr 15  2024 tox.ini
# 进入解压后的目录cd cx_Oracle-8.3.0# 安装 cx_Oracle 驱动python3 setup.py install# 已安装(project1) [root@iZwz9ak4ce2et9ihb25omrZ project1]# pip list |grep cxcx_Oracle  8.3.0.post84

测试连接demo,注意配置好环境和数据库的连通性

import cx_Oracle# 数据库连接信息username = 'user'password = 'pass'oracle_connection = 'host:port/DB_NAME'# 创建数据库连接conn = cx_Oracle.connect(username, password, oracle_connection)def exec_sql(sql):    """执行 SQL 语句"""    cur = conn.cursor()    try:        cur.execute(sql)        conn.commit()        print(f"SQL 执行成功: {sql}")    except Exception as e:        print(f"SQL 执行失败: {sql}")        print(f"错误信息: {e}")    finally:        cur.close()def print_data(sql):    """查询并打印数据"""    cur = conn.cursor()    try:        cur.execute(sql)        data = cur.fetchall()        print(f"查询结果: {data}")        return data    except Exception as e:        print(f"查询失败: {sql}")        print(f"错误信息: {e}")        return None    finally:        cur.close()def test_char_types():    """测试字符类型"""    print("\n=== 测试字符类型 ===")    exec_sql("DROP TABLE test_char")    exec_sql("""        CREATE TABLE test_char (            id INT,             a VARCHAR2(20),             b CHAR(10),             c NCHAR(10),             d NVARCHAR2(10)        )    """)    exec_sql("INSERT INTO test_char VALUES (1, 'hello', 'adffdf', '2df4d', 'dsf44f')")    print_data("SELECT * FROM test_char")def test_number_types():    """测试数值类型"""    print("\n=== 测试数值类型 ===")    exec_sql("DROP TABLE test_number")    exec_sql("""        CREATE TABLE test_number (            a NUMBER,             b FLOAT(126),             c BINARY_FLOAT,             d BINARY_DOUBLE        )    """)    exec_sql("INSERT INTO test_number VALUES (12.32, 12.34, 14.23, 123.3433)")    print_data("SELECT * FROM test_number")def test_time_types():    """测试时间类型"""    print("\n=== 测试时间类型 ===")    exec_sql("DROP TABLE test_time")    exec_sql("""        CREATE TABLE test_time (            a DATE,             b TIMESTAMP,             c TIMESTAMP WITH TIME ZONE,             d TIMESTAMP WITH LOCAL TIME ZONE        )    """)    exec_sql("""        INSERT INTO test_time VALUES (            TIMESTAMP'2022-08-29 14:44:30',             TIMESTAMP'2022-08-29 14:44:30',             TIMESTAMP'2022-08-29 14:44:30',             TIMESTAMP'2022-08-29 14:44:30'        )    """)    print_data("SELECT * FROM test_time")def test_lob_types():    """测试 LOB 类型"""    print("\n=== 测试 LOB 类型 ===")    exec_sql("DROP TABLE test_lob")    exec_sql("""        CREATE TABLE test_lob (            a CLOB,             b BLOB,             c RAW(100)        )    """)    exec_sql("INSERT INTO test_lob VALUES ('sdfdslkfjldsf', '31323334353637', '31323334')")    print_data("SELECT * FROM test_lob")def main():    """主函数"""    try:        print("开始测试 OceanBase 数据库 Oracle 模式连接...")        # 测试各种数据类型        test_char_types()        test_number_types()        test_time_types()        test_lob_types()        print("\n所有测试完成!")    except Exception as e:        print(f"测试过程中发生错误: {e}")    finally:        # 关闭数据库连接        if conn:            conn.close()            print("数据库连接已关闭")if __name__ == "__main__":    main()
(project1) [root@iZwz9ak4ce2et9ihb25omrZ project1]# python3 test_oracle.py开始测试 OceanBase 数据库 Oracle 模式连接...=== 测试字符类型 ===SQL 执行成功: DROP TABLE test_charSQL 执行成功:         CREATE TABLE test_char (            id INT,             a VARCHAR2(20),             b CHAR(10),             c NCHAR(10),             d NVARCHAR2(10)        )SQL 执行成功: INSERT INTO test_char VALUES (1, 'hello', 'adffdf', '2df4d', 'dsf44f')查询结果: [(1, 'hello', 'adffdf    ', '2df4d     ', 'dsf44f')]=== 测试数值类型 ===SQL 执行成功: DROP TABLE test_numberSQL 执行成功:         CREATE TABLE test_number (            a NUMBER,             b FLOAT(126),             c BINARY_FLOAT,             d BINARY_DOUBLE        )SQL 执行成功: INSERT INTO test_number VALUES (12.32, 12.34, 14.23, 123.3433)查询结果: [(12.32, 12.34, 14.229999542236328, 123.3433)]=== 测试时间类型 ===SQL 执行成功: DROP TABLE test_timeSQL 执行成功:         CREATE TABLE test_time (            a DATE,             b TIMESTAMP,             c TIMESTAMP WITH TIME ZONE,             d TIMESTAMP WITH LOCAL TIME ZONE        )SQL 执行成功:         INSERT INTO test_time VALUES (            TIMESTAMP'2022-08-29 14:44:30',             TIMESTAMP'2022-08-29 14:44:30',             TIMESTAMP'2022-08-29 14:44:30',             TIMESTAMP'2022-08-29 14:44:30'        )查询结果: [(datetime.datetime(2022, 8, 29, 14, 44, 30), datetime.datetime(2022, 8, 29, 14, 44, 30), datetime.datetime(2022, 8, 29, 14, 44, 30), datetime.datetime(2022, 8, 29, 14, 44, 30))]=== 测试 LOB 类型 ===SQL 执行成功: DROP TABLE test_lobSQL 执行成功:         CREATE TABLE test_lob (            a CLOB,             b BLOB,             c RAW(100)        )SQL 执行成功: INSERT INTO test_lob VALUES ('sdfdslkfjldsf', '31323334353637', '31323334')查询结果: [(, , b'1234')]所有测试完成!数据库连接已关闭

参考文档

Python 驱动连接 OceanBase 数据库 Oracle 模式指南

https://www.oceanbase.com/docs/common-oceanbase-database-cn-1000000004802405

安装 OBCI

https://www.oceanbase.com/docs/enterprise-obci-cn-1000000003572580

如果在操作过程中遇到问题,欢迎在评论区留言交流,后续我们会持续分享更多实战运维干货,记得关注不迷路,下次见~

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  1. CONNECT:[ UseTime:0.000804s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001293s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000629s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000638s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001269s ]
  6. SELECT * FROM `set` [ RunTime:0.000518s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001536s ]
  8. SELECT * FROM `article` WHERE `id` = 506382 LIMIT 1 [ RunTime:0.001225s ]
  9. UPDATE `article` SET `lasttime` = 1787302182 WHERE `id` = 506382 [ RunTime:0.024502s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000634s ]
  11. SELECT * FROM `article` WHERE `id` < 506382 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001419s ]
  12. SELECT * FROM `article` WHERE `id` > 506382 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.010347s ]
  13. SELECT * FROM `article` WHERE `id` < 506382 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002038s ]
  14. SELECT * FROM `article` WHERE `id` < 506382 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.018123s ]
  15. SELECT * FROM `article` WHERE `id` < 506382 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.045885s ]
0.273332s