我正尝试替换此呼叫:
cursor = connection.cursor()
try:
sql = "select m.lat, m.longt, v.tmax from vcsn_view v, vcsn_metadata m where set_vcsn('local_day=to_date(20180304)-1') is null and v.agent_no = m.agent_no(+) order by 1,2"
cursor.execute(sql)
for lat, longt, tmax in cursor:
print("Values:", lat, longt, tmax)
except cx_Oracle.DatabaseError, e:
printf ('Failed to select\n')
printException(e)
exit(1)
带有将查询中的日期作为变量的调用,即:
cursor = connection.cursor()
try:
sql = "select m.lat, m.longt, v.tmax from vcsn_view v, vcsn_metadata m where set_vcsn('local_day=to_date(:1)-1') is null and v.agent_no = m.agent_no(+) order by 1,2"
cursor.execute(sql, (20180304,))
for lat, longt, tmax in cursor:
print("Values:", lat, longt, tmax)
except cx_Oracle.DatabaseError, e:
printf ('Failed to select\n')
printException(e)
exit(1)
但是我无法使其正常工作。我收到错误消息:
选择失败
错误代码= 1036
错误消息= ORA-01036:无效的变量名称/编号
答案 0 :(得分:0)
在您的SQL中,您使用:1内引号使它无法工作。我不确定set_vcsn()是否需要字符串。假设确实如此,您需要执行以下操作:cursor = connection.cursor()
try:
sql = "select m.lat, m.longt, v.tmax from vcsn_view v, vcsn_metadata m where set_vcsn('local_day=to_date(' || :1 || ')-1') is null and v.agent_no = m.agent_no(+) order by 1,2"
cursor.execute(sql, (20180304,))
for lat, longt, tmax in cursor:
print("Values:", lat, longt, tmax)
except cx_Oracle.DatabaseError, e:
printf ('Failed to select\n')
printException(e)
exit(1)
如果set_vcsn()不需要字符串,那么如果需要进一步的帮助,提供更多的信息将很有帮助。但是通常,不会在字符串中的值中搜索绑定变量!