在 cx_oracle 上使用多个主机

Question

我正在使用 cx_oracle pip 包连接到工作中的 oracle 数据库。

dsn_tns = cx_Oracle.makedsn('1.2.3.4', '1521', service_name='TRADES')
conn = cx_Oracle.connect(user='analytics_user', password='welcome', dsn=dsn_tns)
c = conn.cursor()
c.execute('SELECT * FROM all_tables')

但是我连接的 oracle 数据库有 2 个主机 IP 地址。

原来给我的连接字符串是这样的；

SERVICE  =
   (DESCRIPTION =
     (ADDRESS = (PROTOCOL = TCP)(HOST = 1.2.3.4)(Port=1521))
     (ADDRESS = (PROTOCOL = TCP)(HOST = 1.222.33.44)(Port=1521))
     (CONNECT_DATA =
       (SERVICE_NAME = TRADES)
     )
   )

是否可以在 cx_oracle 上同时使用两者？或者我可以使用任何其他包来允许吗？ SQL_Alchemy?

Answer 1

您可以按原样使用 DSN 字符串，无需 SERVICE =:

DSN = """
   (DESCRIPTION =
     (ADDRESS = (PROTOCOL = TCP)(HOST = 1.2.3.4)(Port=1521))
     (ADDRESS = (PROTOCOL = TCP)(HOST = 1.222.33.44)(Port=1521))
     (CONNECT_DATA =
       (SERVICE_NAME = TRADES)
     )
   )
"""

with cx_Oracle.connect(user='user', password='pass', dsn=dsn_tns) as conn:
    c = conn.cursor()
    c.execute('SELECT * FROM all_tables')

感谢@Christopher-Jones 详情oracle-net-connect-descriptor-strings

在 cx_oracle 上使用多个主机

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