From:?http://space.itpub.net/22664653/viewspace-711728

Python 連接Oracle 數據庫，需要使用cx_Oracle 包。 1 下載cx_Oracle 該包的下載地址：http://cx-oracle.sourceforge.net/ 下載的時候，注意選擇與操作系統和oracle版本相對應的cx_Oracle版本。 2 安裝 [root@rac3 python]# rpm -ivh cx_Oracle-5.1.1-11g-py24-1.x86_64.rpm? Preparing... ? ? ? ? ? ? ? ?########################################### [100%] ? ?1:cx_Oracle ? ? ? ? ? ? ?########################################### [100%]
3 測試： ?? oracle@rac3:/home/oracle/python>cat test.py? import cx_Oracle? username = "yang"? userpwd = "yang"? host = "127.0.0.1"? port = 1523? dbname = "yangdb"?
dsn=cx_Oracle.makedsn(host, port, dbname)? connection=cx_Oracle.connect(username, userpwd, dsn)? cursor = connection.cursor()? sql = "select * from tab"? cursor.execute(sql)? result = cursor.fetchall()? count = cursor.rowcount? print "====================="? print "Total:", count? print "====================="? for row in result:? ? ? ? ? print row? cursor.close()? connection.close() 測試結果： oracle@rac3:/home/oracle/python>python test.py? ===================== Total: 9 ===================== ('BIG_TABLE', 'TABLE', None) ('BIN$sgD3dAkmWHfgQPoK8Qcq3Q==$0', 'TABLE', None) ('BIND', 'TABLE', None) ('IM_SMS_ADD_FRIEND', 'TABLE', None) ('PARALTAB', 'TABLE', None) ('T1', 'TABLE', None) ('T2', 'TABLE', None) ('T3', 'TABLE', None) ('T4', 'TABLE', None)
遇到的問題： 1 要在oracle 用戶才能執行import cx_Oracle [root@rac3 ~]# python Python 2.4.3 (#1, Jan 21 2009, 01:11:33)? [GCC 4.1.2 20071124 (Red Hat 4.1.2-42)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import cx_Oracle Traceback (most recent call last): ? File "<stdin>", line 1, in ? ImportError: libclntsh.so.11.1: cannot open shared object file: No such file or directory >>>
如果在oracle 也遇到 ImportError: libclntsh.so.11.1: cannot open shared object file: No such file or directory 要查看.bash_profile 文件：和環境變量 LD_LIBRARY_PATH有關，一定要設置為： LD_LIBRARY_PATH=$ORACLE_HOME/lib:/usr/lib:/usr/local/lib;export LD_LIBRARY_PATH 2 ORA-12505: TNS:listener does not currently know of SID given in connect descriptor oracle@rac3:/home/oracle/python>python test.py? Traceback (most recent call last): ? File "test.py", line 10, in ? ? ? connection=cx_Oracle.connect(username, userpwd, dsn)? cx_Oracle.DatabaseError: ORA-12505: TNS:listener does not currently know of SID given in connect descriptor
oracle@rac3:/opt/oracle/11.2.0/alifpre/network/admin>cat tnsnames.ora? # tnsnames.ora Network Configuration File: /opt/oracle/11.2.0/alifpre/network/admin/tnsnames.ora # Generated by Oracle configuration tools.
yangdb = ? (DESCRIPTION = ? ? (ADDRESS = (PROTOCOL = TCP)(HOST = 10.250.7.241 )(PORT = 1523)) ? ? (CONNECT_DATA = ? ? ? (SERVER = DEDICATED) ? ? ? (SERVICE_NAME = yangdb) ? ? ) ? ) listener.ora 文件中 SID_LIST_LISTENER = ? ? ? (SID_LIST = ? ? ? ? ?(SID_DESC = ? ? ? ? ? ?(SID_NAME = PLSExtProc) ? ? ? ? ? ? ?(ORACLE_HOME = /opt/oracle/11.2.0/alifpre) ? ? ? ? ? ?(PROGRAM = extproc) ? ? ? ? ?) ? ? ? ? (SID_DESC = ? ? ? ? ? (GLOBAL_DBNAME = yang) ? ? ? ? ? ?(ORACLE_HOME = /opt/oracle/11.2.0/alifpre) ? ? ? ? ? (SID_NAME =yangdb) ? ? ? ? ?) ? ? ?)
? (GLOBAL_DBNAME = yang)與tnsnams.ora 文件中的tns連接名不一致導致，修改為yangdb，重新啟動監聽或者lsnrclt reload 即可

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