标签: cx-oracle

我正在为python日志记录模块处理一个处理程序.这基本上记录到oracle数据库.

我正在使用cx_oracle,当表为空时,我不知道如何获取的是列值.

cursor.execute('select * from FOO')
for row in cursor:
    # this is never executed because cursor has no rows
    print '%s\n' % row.description

# This prints none
row = cursor.fetchone()
print str(row)

row = cursor.fetchvars
# prints useful info
for each in row:
    print each

输出是:

None
<cx_Oracle.DATETIME with value [None, None, None, None, None, None, None, None, None, None, None, None, None, None, None
, None, None, None, None, None, None, None, None, None, None, None, None, None, …

当我使用Python解释器运行它时,我的python程序(Python 2.6)工作正常,它连接到Oracle数据库(10g XE)而没有错误.但是,当我使用py2exe编译它时,可执行版本在调用cx_Oracle.connect()时失败并显示"无法获取Oracle环境句柄".

我没有高兴地试过以下事情:

• Oracle即时客户端10g和11g
• Oracle XE客户端
• 重新安装cx_Oracle-5.0.2-10g.win32-py2.6.msi
• 设置ORACLE_HOME以及PATH
• 另一台只有Oracle客户端和exe的计算机
• 构建exe的各种选项(无压缩和/或使用zip文件)

我的测试用例:

testora.py:

import cx_Oracle
import decimal # needed for py2exe to compile this correctly

def testora():
    """testora

    >>> testora.testora()
    <cx_Oracle.Connection to scott@localhost:1521/orcl>
    X
    """
    orcl = cx_Oracle.connect('scott/tiger@localhost:1521/orcl')
    print orcl
    curs = orcl.cursor()
    result = curs.execute('SELECT * FROM DUAL')
    for (dummy,) in result:
        print dummy

if __name__ == '__main__':
    testora()

build_testora.py:

from distutils.core import setup
import py2exe, sys

sys.argv.append('py2exe')

setup(
    options = {'py2exe': {
        'bundle_files': 2,
        'compressed': True …

我试图在python和oracle db之间调用存储过程.我遇到的问题是将光标传递给参数.

Oracle存储过程基本上是:

create or replace procedure sp_procedure(
    cid int, 
    rep_date date,
    ret out sys_refcursor
) is
begin

  open ret for 
  select  
 ...
  end;

调用数据库的python代码是:

import cx_Oracle
from datetime import date

connstr='user/pass@127.0.0.1:2521/XE'
conn = cx_Oracle.connect(connstr)
curs = conn.cursor()

cid = 1
rep_date = date(2011,06,30)

curs.callproc('sp_procedure', (cid, rep_date, curs))

错误是:

curs.callproc('sp_procedure', (cid, rep_date, curs))
cx_Oracle.DatabaseError: ORA-01036: illegal variable name/number

我也试过传递一个字典作为keywordsParameters:

cid = 1
rep_date = date(2011,06,30)

call_params = {'cid': cid, 'rep_date': rep_date, 'ret': curs}
curs.callproc('sp_procedure', (cid, rep_date, curs), call_params)

返回相同的错误.

谢谢.

我有安装cx_oracle的问题.我安装了oracle instantclient和cx_oracle oracle软件包安装后我在导入cx_oracle时收到此错误.我正在运行ubuntu 11.10作为主机.

import cx_Oracle
Traceback (most recent call last):
File "<console>", line 1, in <module>
ImportError: /usr/lib/python2.7/dist-packages/cx_Oracle.so: undefined symbol:PyUnicodeUCS2_AsEncodedString

任何人都知道如何解决这个问题

干杯

我已经安装了oracle客户端和oracle client-dev,并设置了ORACLE_HOME环境变量.然而,当我尝试安装tux_oracle(python setup.py build)时,我得到以下内容:致命错误:oci.h:没有这样的文件或目录

我正在开发一个系统的一部分,其中进程限制在大约350MB的RAM; 我们使用cx_Oracle从外部系统下载文件进行处理.

外部系统将文件存储为BLOB,我们可以抓住它们执行以下操作:

# ... set up Oracle connection, then
cursor.execute(u"""SELECT   filename, data, filesize
                   FROM    FILEDATA
                   WHERE   ID = :id""", id=the_one_you_wanted)
filename, lob, filesize = cursor.fetchone()

with open(filename, "w") as the_file:
    the_file.write(lob.read())

lob.read()MemoryError当我们点击一​​个大于300-350MB的文件时,显然会失败,所以我们尝试过这样的东西,而不是一次性读取所有内容:

read_size = 0
chunk_size = lob.getchunksize() * 100
while read_size < filesize:
    data = lob.read(chunk_size, read_size + 1)
    read_size += len(data)
    the_file.write(data)

不幸的是,我们仍然MemoryError经历了几次迭代.从时间开始lob.read(),以及我们最终获得的内存不足情况,看起来好像每次都lob.read()从数据库中提取(chunk_size + read_size)字节.也就是说,即使缓冲区相当小,读取也需要O(n)时间和O(n)存储器.

为了解决这个问题,我们尝试过类似的方法:

read_size = 0
while read_size < filesize:
    q = u'''SELECT dbms_lob.substr(data, 2000, …

我需要将以下值替换为select查询.但我得到了错误,如下所述

self.jobNo = J-12060
qcActivity = C173
self.wrkArea = 1666339

cursor.execute("""SELECT A.MARKERID, D.COMMENTS,A.STATUS,A.X1,A.Y1,A.X2,A.Y2,C.ERRGROUP,C.ERRDESC,c.category
           FROM MDP_ERR_MASTER A,(SELECT MARKERID, MAX(RECNO) maxRECNO FROM MDP_ERR_MASTER where project_code = ':jobno'
           and errorcode like ':jobno_:qcActivity%' AND WORKAREA LIKE ':workarea%'
           GROUP BY MARKERID) B,MDP_ERR_CONFIG C,(SELECT MARKERID, COMMENTS FROM MDP_ERR_MASTER WHERE PROJECT_CODE = ':jobno'
           AND RECNO = 1 AND errorcode like ':jobno_:qcActivity%' AND WORKAREA LIKE ':workarea%') D
           WHERE(A.MARKERID = B.MARKERID And A.RECNO = B.maxRECNO And A.Markerid = D.MARKERID)AND A.PROJECT_CODE = ':jobno'
           AND A.ERRORCODE LIKE ':jobno_:qcActivity%'  AND A.WORKAREA LIKE …

据我了解,有一些与SIP有关的变化使得安装这一点变得困难.

这些页面有安装的背景和建议.http://sourceforge.net/p/cx-oracle/mailman/message/34534872/,http://stefanoapostolico.com/2015/10/08/install_cx_oracle_with_sip_enabled.html

把所有这些放在一起,这是我最好的把它安装到我的virtualenv,但唉,仍然没有好处.

我得到的错误是:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
ImportError: dlopen(/Users/me/sx_direct_env/lib/python2.7/site-packages/cx_Oracle.so, 2): Library not loaded: /b/227/rdbms/lib/libclntsh.dylib.10.1
  Referenced from: /Users/me/sx_direct_env/lib/python2.7/site-packages/cx_Oracle.so
  Reason: image not found

以下是我的所有安装步骤:

$ cd /Users/me/sx_direct_env/lib/python2.7
$ mkdir oracle
$ cd oracle
$ export ORACLE_HOME=$PWD
$ export DYLD_LIBRARY_PATH=$ORACLE_HOME
$ export LD_LIBRARY_PATH=$ORACLE_HOME
$ export PATH=$PATH:$ORACLE_HOME
$ unzip ~/Downloads/instantclient-basic-macos.x64-11.2.0.4.0.zip
$ unzip ~/Downloads/instantclient-sdk-macos.x64-11.2.0.4.0.zip
$ mv instantclient_11_2/* .
$ rmdir instantclient_11_2
$ curl -O https://raw.githubusercontent.com/kubo/fix_oralib_osx/master/fix_oralib.rb
$ ruby -a fix_oralib.rb 
adrci:
   add rpath: @loader_path
   change …

我安装了cx_Oracle,我可以成功导入它.但是当我尝试建立Oracle连接时,我收到此错误:

Traceback (most recent call last): File "<stdin>", line 1, in <module> cx_Oracle.InterfaceError: Unable to acquire Oracle environment handle

我的操作系统是MacOSX,我的ORACLE_HOME指向instantclient_11_2.

我正在尝试安装 cx_Oracle，但收到此错误，\n我安装了最新的 setuptools 和 pip。\n有人遇到过类似的问题吗？他们是如何解决的？

我有 Visual Studio：请参见图片

Processing c:\\....resources\\cx_oracle-8.1.0.tar.gz\n  Installing build dependencies ... done\n  Getting requirements to build wheel ... done\n  Preparing metadata (pyproject.toml) ... done\nBuilding wheels for collected packages: cx_Oracle\n  Building wheel for cx_Oracle (pyproject.toml) ... error\n  error: subprocess-exited-with-error\n\n  \xc3\x97 Building wheel for cx_Oracle (pyproject.toml) did not run successfully.\n  \xc2\xa6 exit code: 1\n  ?-> [7 lines of output]\n      C:\\....\\2\\pip-build-env-806_5jc6\\overlay\\Lib\\site-packages\\setuptools\\config\\expand.py:144: UserWarning: File \'C:\\\\....\\\\2\\\\pip-install-r8jb3ohi\\\\cx-oracle_111cfa7e3d91425bb65e9a6baa89c82f\\\\README.md\' cannot be found\n        warnings.warn(f"File {path!r} cannot be found")\n      running bdist_wheel\n      running build\n      running …