无法使用PYODBC和Python获取更新的数据库数据

在Python中，我似乎在从Flask连接查询PYODBC连接时遇到问题。最初，我让整个文件使用相同的连接，但注意到当您点击Get请求的URL时，它不会返回最新的数据。所以我将脚本调整为每次启动get请求时启动和终止连接，这将返回相同的未更新数据。我注意到它偶尔会更新数据，但大多数时候不会

请协助更好地澄清这一过程

def getChg(s, cursor, arr):
getIncResolved = "SELECT COUNT(incident.number) FROM SCHEMA.OAUSER.incident incident WHERE incident.dv_resolved_by = '" + str(s) + "' AND incident.resolved_at BETWEEN '" + str(past) + "' AND '" + str(current) + "' AND incident.dv_opened_by != '" + str(s) + "';"
getTaskResolved = "SELECT COUNT(sc_task.number) FROM SCHEMA.OAUSER.sc_task sc_task WHERE sc_task.dv_closed_by = '" + str(s) + "' AND sc_task.closed_at BETWEEN '" + str(past) + "' AND '" + str(current) + "' AND sc_task.dv_opened_by != '" + str(s) + "';"
getCallStarted = "SELECT COUNT(new_call.number) FROM SCHEMA.OAUSER.new_call new_call WHERE  new_call.opened_at BETWEEN '" + str(past) + "' AND '" + str(current) + "' AND new_call.dv_opened_by = '" + str(s) + "';"
i = 0
t = 0
c = 0
cursor.execute(getIncResolved)
for row in cursor.fetchall():
    i = row[0]

cursor.execute(getTaskResolved)
for row in cursor.fetchall():
    t = row[0]
cursor.execute(getCallStarted)
for row in cursor.fetchall():
    c = row[0]
if c > -1:
    test = {'Agent': str(s), 'Calls': c, 'Inc': i, 'Task': t}
    arr.append(test)



@app.route('/data',methods=['GET', 'POST'])
def api_root():  cnxn=pyodbc.connect('DSN=ServiceNow;Uid=ServiceOps;Pwd=********;',autocommit=True)
cursor = cnxn.cursor()
data = []
staffjson = request.get_json(force=True)
staff = staffjson['users']
print(staff)
del data[:]
for s in staff:
    getChg(s, cursor, data)
print(data)
cnxn.close()
return json.dumps(data)

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当前变量仅在脚本的初始开始时创建。因此，一旦加载，它就不会更新到当前时间

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现在在每个请求中都创建了变量，并按照我的预期工作

谢谢你。此ODBC驱动程序仅允许SELECT。将不会写入数据库。我将调整为参数化查询，以获得更好的习惯。