如何在Python中的Pymmsql中创建和重新创建索引

Question

我试图在Python中创建和重新创建索引，但当我使用它时，我遇到了一个错误。

Error:
  File "srcpymssql.pyx", line 468, in pymssql.Cursor.execute
  pymssql.OperationalError: (7999, b"Could not find any index named 'Micros' for table 
  'payrolldata'.DB-Lib error message 20018, severity 16:nGeneral SQL Server error: Check messages 
  from the SQL Servern")

代码：

with pymssql.connect ("127.0.0.1","arcdbadmin", "@rcT3chn010g13$","Micros") as myDbConn:
   with myDbConn.cursor(as_dict=True) as cursor:
       cursor.execute("""create index Micros on payrolldata(stono,payrollid,busdate) WITH(DROP_EXISTING = ON);""")
       myDbConn.commit()
           

Answer 1

除非索引已经存在，否则不能使用 WITH(DROP_EXISTING = ON)。

您可以先删除索引(如果存在(：

drop index if exists Micros on payrolldata

如果你愿意的话，先来。在旧版本上，您可以运行

if exists (select * from sys.indexes where name = 'Micros' and object_id('payrolldata') = object_id)
begin
  drop index micros on payrolldata
end