用多个用“;"分隔的语句执行SQL文件.使用pyodbc [英] Execute SQL file with multiple statements separated by ";" using pyodbc

问题描述

我目前正在编写一个脚本，以使用Python运行多个SQL文件，这是您提到替代方法之前的一些背景知识；这是为了使脚本自动化，而Python是我在Windows 2008服务器上拥有的唯一工具.我有一个适用于一组的脚本，但问题是，另一组有两个语句，而不是用;"分隔这是我的代码:

I am currently writing a script to run multiple SQL files using Python, a little background before you mention alternative methods; this is to automate the scripts and Python is the only tools I have on our windows 2008 server. I have a script that works for one set but the issue is when the other set has two statements instead of one seperated by a ';' here is my code:

import os
import pyodbc

print ("Connecting via ODBC")

conn = pyodbc.connect('DSN=dsn', autocommit=True)

print ("Connected!\n")

 inputdir = 'C:\\path'
cursor = conn.cursor()

for script in os.listdir(inputdir):

   with open(inputdir+'\\' + script,'r') as inserts:

       sqlScript = inserts.readlines()

       sql = (" ".join(sqlScript))

       cursor.execute(sql)

       print (script)

conn.close()

print ('Run Complete!')

因此，此代码可显示整个文件，但只执行;"之前的一条语句.

So this code works to show the entire file but it only executes one statement before ";".

任何帮助都会很棒！

谢谢.

推荐答案

pyodbc连接器(或pymysql)中的API不允许在SQL调用中使用多个语句.这是引擎解析的问题；一个API需要完全了解要传递的SQL，以便传递多个语句，然后在返回时处理多个结果.

The API in the pyodbc connector (or pymysql) doesn't allow multiple statements in a SQL call. This is an issue of engine parsing; an API would need to completely understand the SQL that it's passing in order for multiple statements to be passed, and then multiple results handled upon return.

对脚本进行如下稍作修改后，应该可以使用单独的连接器分别发送每个语句:

A slight modification to your script like the one below should allow you to send each of your statements individually with separate connectors:

import os
import pyodbc

print ("Connecting via ODBC")

conn = pyodbc.connect('DSN=dsn', autocommit=True)

print ("Connected!\n")

inputdir = 'C:\\path'

for script in os.listdir(inputdir):
    with open(inputdir+'\\' + script,'r') as inserts:
        sqlScript = inserts.readlines()
        for statement in sqlScript.split(';'):
            with conn.cursor() as cur:
                cur.execute(statement)
    print(script)

conn.close()

with conn.cursor() as cur:打开并关闭每个语句的游标，并在每次调用完成后适当退出.

The with conn.cursor() as cur: opens a closes a cursor for each statement, exiting appropriately after each call is completed.

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