Oracle 中調用外部C動態庫函數

Oracle 中調用外部C動態庫函數

 分類： Oracle

2016-08-20 05:24:52

原文地址：Oracle 中調用外部C動態庫函數 做者：libydwei2007

 

因爲項目爲了縮短開發時間，要在Oracle中調用外部已經開發好的C程序。
查找了網上的一些帖子，再結合實際總結這篇文章。但願對你們有所幫助。
參考文章:http://www.cnblogs.com/mathitlin99/archive/2013/09/05/3303717.html

首先編譯外部動態庫<span "="">libDialPlan.so

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gcc -fPIC -c LibDialPlan.cpp
gcc -shared -o libDialPlan.so LibDialPlan.o -lstdc++

修改Oracle TNS文件和監聽文件。
不清楚你們直接拷貝是否可用。若是有問題，請注意一下等號以及括號兩邊的空格。
tnsnames.ora

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ORADB =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.69.166)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = oradb)
    )
  )

EXTPROC_CONNECTION_DATA=
  (DESCRIPTION=
    (ADDRESS_LIST=
    (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
  )
  (CONNECT_DATA=
    (SID = PLSExtProc)
    (PRESENTATION = RO)
  )
  )

listener.ora

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LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.69.166)(PORT = 1521))
    )
  )

ADR_BASE_LISTENER = /home/oracle/db/app


SID_LIST_LISTENER =
(SID_LIST =
  (SID_DESC =
  (GLOBAL_DBNAME = oradb)
  (SID_NAME = oradb)
  )
  (SID_DESC=
  (SID_NAME = PLSExtProc)
  (ORACLE_HOME = /opt/local/oracle/app/product/11.2.0/dbhome_2)
  (ENVS = EXTPROC_DLLS=ANY)
  (PROGRAM = extproc)
  )
)

修改後重啓監聽:lsnrctl stop ;lsnrctl start
查看監聽狀態，應該出現以下的監聽項: PLSExtProc<span "=""> 

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[root@localhost admin]# lsnrctl status

LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 04-AUG-2016 19:33:50

Copyright (c) 1991, 2009, Oracle. All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 11.2.0.1.0 - Production
Start Date 04-AUG-2016 16:23:54
Uptime 0 days 3 hr. 9 min. 55 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /opt/local/oracle/app/product/11.2.0/dbhome_2/network/admin/listener.ora
Listener Log File /opt/local/oracle/app/product/11.2.0/dbhome_2/network/log/listener.log
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.69.166)(PORT=1521)))
Services Summary...
Service "PLSExtProc" has 1 instance(s).
  Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "oradb" has 1 instance(s).
  Instance "oradb", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully
[root@localhost admin]#

建立Oracle  library 對象

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create or replace library hytpdtbilldb.Fun_Ext_Proc
  as '/opt/local/Oracle_install/Oracle_Call_External_C/libDialPlan.so';

建立函數
1)按照網上的文章，還有一個parameter的參數。
可是我加入這個參數後一直不能編譯經過。去掉後並未影響函數的使用。
2)數字和字符串對應的是binary_integer,varchar2類型。原本C的入參是須要數組類型，可是Oracle沒有真正的數組，只能經過字符串代替。
3)在我測試的過程當中，偶爾須要重啓才能正常調用函數。你們使用的過程當中能夠留意一下。

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create or replace function hytpdtbilldb.Air2Gsi
(x binary_integer,y varchar2)
return varchar2
as
language C
library hytpdtbilldb.Fun_Ext_Proc
name "Air2Gsi";
/