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标题: python 访问PG，异常处理 [打印本页]

作者: 郑全 时间: 2023-12-10 19:19
标题: python 访问PG，异常处理
1.语句

  [postgres@eulersvr ~]$ cat except.py
# _*_ coding:utf-8 _*_
import psycopg2

conn= psycopg2.connect(database="postgres",user="postgres",password="postgres",host="192.168.0.38",port="5432")

cursor=conn.cursor()
sql="""delete  from emp1; """

params=(100,)

try:
  cursor.execute(sql,params)

except psycopg2.Error as er:
   print(er)

conn.commit()

cursor.close()

conn.close()

2.执行

  [postgres@eulersvr ~]$ python3 except.py
relation "emp1" does not exist
LINE 1: delete  from emp1;
                  ^

[postgres@eulersvr ~]$

3.验证

  [postgres@eulersvr ~]$ psql
psql (16.1)
Type "help" for help.

postgres=#
postgres=#
postgres=# \d
               List of relations
Schema |       Name       | Type |  Owner
--------+---------------------+----------+----------
public | emp                | table | postgres
public | emp_id_seq       | sequence | postgres
public | employees          | table | postgres
public | employees_empid_seq | sequence | postgres
(4 rows)

我这里确实没有emp1 ，所以报错。

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