Question

运行以下脚本时，它会在以下错误中结束，因为我发现此错误的其他帖子我没有找到类似于我的脚本的修复程序。谢谢你的帮助！

*Traceback (most recent call last):
  File "D:\DVO\Bo\Marketing Hours\archive\active_assets.py", line 9, in <module>
    r"D:\User folders\VOD_Titles\BCST_assets.txt"
  File "D:\DVO\Bo\Marketing Hours\archive\seac_assets.py", line 67, in main
    assets = [asset_record(*row) for results in mssql_query(connect_string, sql_string, [today_string, today_string]) for row in results]
  File "D:\DVO\Bo\Marketing Hours\archive\seac_assets.py", line 67, in <listcomp>
    assets = [asset_record(*row) for results in mssql_query(connect_string, sql_string, [today_string, today_string]) for row in results]
  File "D:\DVO\Bo\Marketing Hours\archive\seac_assets.py", line 24, in mssql_query
    db_cursor.execute(sql_string, vars)
pyodbc.ProgrammingError: ('The SQL contains 1 parameter markers, but 2 parameters were supplied', 'HY000')*

这是主脚本，调用seac_assets

import seac_assets

if __name__ == "__main__":
  online = True

  if online:
    seac_assets.main(
      "DRIVER={SQL Server};SERVER=172.18.192.68;DATABASE=IdwData;UID=suddenlink;PWD=5udd3nlink",
      r"D:\User folders\VOD_Titles\BCST_assets.txt"
    )
    seac_assets.main(
      "DRIVER={SQL Server};SERVER=172.19.241.51;DATABASE=IdwData;UID=suddenlink;PWD=5udd3nlink",
      r"D:\User folders\VOD_Titles\CHRM_assets.txt"
    )

这是使用pyodbc的实际代码，以错误结尾

import pyodbc
import csv
from collections import defaultdict, namedtuple
from datetime import datetime, timedelta

asset_record = namedtuple("asset_record", """\
wuid,
name,
title_brief,
activate_date,
deactivate_date""")

def mssql_query(connect_string,
                sql_string,
                vars=None,
                TIMEOUT_VALUE=300,
                FETCH_ROWS=5000,
                MAX_ROWS=10 ** 6):
  # Set up the database connection and cursor
  db_conn = pyodbc.connect(connect_string, timeout=TIMEOUT_VALUE)
  db_cursor = db_conn.cursor()

  # Execute the passed SQL statements
  db_cursor.execute(sql_string, vars)

  r = [] # Holds one batch of results
  L = 0
  while True:
    r = db_cursor.fetchmany(FETCH_ROWS)
    if r == []: # fetchmany() returns [] when finished
      break
    L += len(r)
    if L > MAX_ROWS:
      print(">>Fetched more than ", MAX_ROWS, ", aborting.")
      break
    yield r
    print("Fetched {} rows".format(L))
  print(">>Finished fetching rows.")

  #End the database connection and return the results
  db_cursor.close()
  db_conn.close()

def main(connect_string, outfile_path):
  sql_string = """\
SELECT
  ref.WUID,
  ref.Name,
  a.TitleBrief,
  dates.ActivateDate,
  dates.DeactivateDate
FROM
  dbo.WHIDS_Asset AS ref WITH (NOLOCK)
  LEFT JOIN dbo.WHIDS_ATitleBrief AS a WITH (NOLOCK)
    ON ref.WUID = a.WUID
  LEFT JOIN dbo.WHIDS_AActivateDeactivateDates AS dates WITH (NOLOCK)
    ON ref.WUID = dates.WUID
WHERE
  dates.DeactivateDate >= ?
  AND a.TitleBrief IS NOT NULL
ORDER BY 
  dates.DeactivateDate"""

  today = datetime.today()
  today_string = today.strftime("%Y-%m-%d")
  print (asset_record)
  assets = [asset_record(*row) for results in mssql_query(connect_string, sql_string, [today_string, today_string]) for row in results]
  print (assets)

  with open(outfile_path, "w") as outfile:
    print("WUID",
          "NAME",
          "TITLE_BRIEF",
          "ACTIVATE_DATE",
          "DEACTIVATE_DATE",
          sep='\t',
          file=outfile)
    for a in assets:
      print(a.wuid,
            a.name,
            a.title_brief,
            a.activate_date.strftime("%Y-%m-%d %H:%M"),
            a.deactivate_date.strftime("%Y-%m-%d %H:%M"),
            sep='\t',
            file=outfile)

Answer 1

嗯，错误说你有一个参数标记和两个参数。我看看你的sql：

SELECT
  ref.WUID,
  ref.Name,
  a.TitleBrief,
  dates.ActivateDate,
  dates.DeactivateDate
FROM
  dbo.WHIDS_Asset AS ref WITH (NOLOCK)
  LEFT JOIN dbo.WHIDS_ATitleBrief AS a WITH (NOLOCK)
    ON ref.WUID = a.WUID
  LEFT JOIN dbo.WHIDS_AActivateDeactivateDates AS dates WITH (NOLOCK)
    ON ref.WUID = dates.WUID
WHERE
  dates.DeactivateDate >= ?
  AND a.TitleBrief IS NOT NULL
ORDER BY 
  dates.DeactivateDate

我看到一个参数标记（where子句中的?）。

当我查看您提交查询的地方时：

mssql_query(connect_string, sql_string, [today_string, today_string])

我看到你传递了两份today_string作为参数。就像错误信息所说：一个参数标记，两个参数。尝试将查询更改为

mssql_query(connect_string, sql_string, [today_string])

ProgrammingError：（＆＃39; SQL包含1个参数标记，但提供了2个参数＆＃39;，＆＃39; HY000＆＃39;）

1 个答案: