Question

当前，我成功连接到数据库，然后执行一些sql语句，但是当我尝试检索查询结果时，遇到以下raise ProgrammingError(state,err_text) pypyodbc.ProgrammingError: ('24000', '[24000] [Microsoft][ODBC SQL Server Driver]Invalid cursor state')。

这是我的代码：

# Connection to MSSQL
import pypyodbc

connection_live_db = pypyodbc.connect(driver="{SQL Server}", server="xxx.xxx.xxx.xxx", uid="test",
                                                  pwd="xxxx", Trusted_Connection="No")

credit_hold_co = connection_live_db.cursor()

# read the sql file in buffer and close
read_sql_file = open('C:\\Users\\userX\\Documents\\Scripts\\credit_hold_co.sql','r')
sql_file = read_sql_file.read()
read_sql_file.close()

# split each sql statement by ;
sqlCommands = sql_file.split(';')

results_sql = ""

# iterate over each command and execute it
for command in sqlCommands:
    try:
        credit_hold_co.execute(command)
    except ValueError:
        print(command)
    # retrieve results
    results = results + str(credit_hold_co.fetchall())


# close sql connection
credit_hold_co.close()

这是我尝试执行的sql命令的示例：

-- credit_hold_co
if OBJECT_ID('tempdb..#Credit_Hold_CO') is not NULL
drop table #Credit_Hold_CO;

create table #Credit_Hold_CO
    ([co_num] varchar(30),
     [credit_hold] char(1),
     [credit_hold_reason] char(5),
     ['Type of credit hold reason'] varchar(20),
     [credit_hold_date] datetime );

insert into #Credit_Hold_CO([co_num],[credit_hold],[credit_hold_reason],['Type of credit hold reason'],[credit_hold_date])
  select distinct co_num, credit_hold, credit_hold_reason, 
   (case 
       when credit_hold_reason = 'PD' then 'Past due payments'
       when credit_hold_reason = 'BR' then 'Bankruptcy'
    end) as 'Type of credit hold reason',
 credit_hold_date
 FROM [Database].[dbo].[co] where credit_hold = '1';

select * from #Credit_Hold_CO
order by orig_site;

drop table #Credit_Hold_CO;

我发现了一些与当前问题有关的链接，例如pypyodbc invalid cursor name和SQL statement invalid cursor state 24000，两者都建议创建另一个游标，以避免第一个游标的结果无效，但没有提供更多详细信息。

问题与解答于7月17日@ 13:31 MT更新：

如何正确检索sql语句的结果？ 从下面查看答案。
我是否强烈需要另一个游标，还是有更好的方法来解决此问题？ 不，另一个游标不是解决方案，而是从SQL查询中删除了临时表。

Answer 1

Alejandro BR和我继续对StackOverflow聊天发表了广泛的评论。经过一番调试后，它有两个方面：

-该文件应该是ANSI编码，或者如果是UTF-8则以这种方式读取： Storyboard.SetTarget(myRectAnimation, myRectangleGeometry);

-通过以下方式简化Python，使其脱离地面，然后继续循环。每个open("your location","r", encoding="utf-8", errors="replace")

需要一个光标

在更新后的查询下方找到：

SELECT

此外，我们必须从txt文件更新sql查询：

# Connection to MSSQL
import pypyodbc

connection_live_db = pypyodbc.connect(driver="{SQL Server}", server="xxx.xxx.xxx.xxx", uid="test",
                                              pwd="xxxx", Trusted_Connection="No")

credit_hold_co = connection_live_db.cursor()

# read the .txt file that contains the query 
# Avoid strange characters by saving the file in ANSI
# or use the following code from below if you save in UTF-8
read_sql_file = open('C:\\Users\\userX\\Documents\\Scripts\\credit_hold_co.txt','r', encoding="utf-8", errors="replace")
sql_file = read_sql_file.read()
read_sql_file.close()

# Execute the file that contains the sql query 
credit_hold_customer_orders.execute(sql_file) 

# store the results in variable
results = credit_hold_customer_orders.fetchall() 

# close cursor
credit_hold_customer_orders.close() 
print(results)

SQL.fetchall（）失败，并带有Python的SQLState 24000（无效的光标状态）

1 个答案: