python 連接informix

參考地址：https://github.com/OpenInformix/IfxPy

1. 下載安裝  Informix Client SDK

    地址：鏈接：https://pan.baidu.com/s/1CXMkwUnhRl4StrhPJ4n5fw 

    提取碼：

    解壓，執行可執行文件即可

2. 安裝IfxPy模塊

    pip install ifxpy

    pip若無法安裝，可選擇離線安裝，下載安裝包，執行：python setup.py install   即可

3. 設置環境變量

   export LD_LIBRARY_PATH=${INFORMIXDIR}/lib:${INFORMIXDIR}/lib/esql:${INFORMIXDIR}/lib/cli

   以下是我的環境變量：

   export LD_LIBRARY_PATH=/opt/IBM/Informix_Client-SDK/lib:/opt/IBM/Informix_Client-SDK/lib/esql:/opt/IBM/Informix_Client-SDK/lib/cli

4. 環境配置

    vim /etc/hosts:

             ip 服務名    

     vim sqlhosts:

               服務名    onsoctcp          服務名       服務名     g=g_服務名

    export INFORMIXSQLHOSTS=/data/sqlhosts

    vim /etc/services 

           服務名    27583/tcp

導庫報錯：ImportError: libifgls.so: cannot open shared object file: No such file or directory

 原因：環境變量沒有配對

5. 連接informix數據庫

# Sample1.py
import IfxPy

def my_Sample():
    ConStr = "SERVER=服務器;DATABASE=庫名;HOST=ip;SERVICE=端口;UID=用戶名;PWD=密碼;"

    try:
        # netstat -a | findstr  27583
        conn = IfxPy.connect( ConStr, "", "")
    except Exception as e:
        print ('ERROR: Connect failed')
        print ( e )
        quit()



    # Select records
    sql = "select tabname from systables where tabid>=100;"   #  查庫下的非系統表
    # sql = "SELECT username FROM 'informix'.sysusers WHERE usertype IN ('D', 'R');"
    stmt = IfxPy.exec_immediate(conn, sql)
    dictionary = IfxPy.fetch_both(stmt)

    rc = 0
    while dictionary != False:
        rc += 1
        print (dictionary)
        dictionary = IfxPy.fetch_both(stmt)

    print( "Total Record Selected {}".format(rc) )

    # Free up memory used by result and then stmt too
    IfxPy.free_result(stmt)
    IfxPy.free_stmt (stmt)

    IfxPy.close(conn)

    print ("Done")

####### Run the sample function ######
my_Sample()