python - 在 fork 中使用 sqlanydb 启动数据库连接

Question

基于 fork 的示例，我构建了这个小脚本:

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import sqlanydb
import os

def child():
    conn = sqlanydb.connect(uid='dba', pwd='sql', eng='somedb_IQ', dbn='somedb')
    curs = conn.cursor()
    curs.execute("""SELECT * FROM foobaa;""")
    os.exit(0)

def parent():
   while True:
      newpid = os.fork()
      if newpid == 0:
         child()
      else:
         pids = (os.getpid(), newpid)
         print "parent: %d, child: %d" % pids
      if raw_input( ) == 'q': break

parent()

目的是在一个单独的进程中执行数据库操作(后面的大目标是同时运行大量查询)。

但是当运行脚本时，我得到:

parent: 20580, child: 20587
Traceback (most recent call last):
  File "connectiontest.py", line 25, in <module>
    parent()
  File "connectiontest.py", line 19, in parent
    child()
  File "connectiontest.py", line 8, in child
    conn = sqlanydb.connect(uid='dba', pwd='sql', eng='somedb_IQ', dbn='somedb')
  File "/usr/local/lib/python2.6/dist-packages/sqlanydb.py", line 461, in connect
    return Connection(args, kwargs)
  File "/usr/local/lib/python2.6/dist-packages/sqlanydb.py", line 510, in __init__
    self.handleerror(*error)
  File "/usr/local/lib/python2.6/dist-packages/sqlanydb.py", line 520, in handleerror
    eh(self, None, errorclass, errorvalue)
  File "/usr/local/lib/python2.6/dist-packages/sqlanydb.py", line 342, in standardErrorHandler
    raise errorclass(errorvalue)
sqlanydb.OperationalError: Failed to initialize connection object

我可能错过了什么？

Answer 1

由于 Sybase IQ 基于 Sybase ASA，您确定您使用的凭证 key 正确吗？这个(尽管是旧的)文档看起来需要 DSN 和 DSF 而不是 ENG 和 DBN。

http://dcx.sybase.com/1101/en/dbprogramming_en11/python-writing-open.html