Question

您好我正在尝试以下脚本

import psycopg2 as pq
import os

# Create the database
os.system('dropdb ptest')
os.system('createdb ptest')
# connect to the database
cn = pq.connect('dbname=ptest user=myname')
cr = cn.cursor()

# the wierd tuple at the EOL below is to preserve the list 
# lookup in case that is where the error is.
cr.execute('CREATE TABLE id1 (%s varchar, %s int PRIMARY KEY, %s int, %s int, %s varchar)' % tuple(['fund', 'sleeve_id', 'sub_id', 'level_id', 'Entity_id'])
cr.execute('INSERT INTO id1 (%s,%s,%s,%s,%s) VALUES ("%s","%s","%s","%s","%s");' % tuple(['fund', 'sleeve_id', 'sub_id', 'level_id', 'Entity_id']+['RHUBARB RHUBARB - RHUBARB RHUBARB', '2', '1', '1', 'CRUMB1']))

我收到了错误

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<string>", line 1, in <module>
psycopg2.InternalError: current transaction is aborted, commands ignored until end of transaction block

我做错了什么？

btw行

发生同样的错误

cr.execute('INSERT INTO id1 (%s,%s,%s,%s,%s) VALUES ("%s","%s","%s","%s","%s");' % ('fund', 'sleeve_id', 'sub_id', 'level_id', 'Entity_id','RHUBARB RHUBARB - RHUBARB RHUBARB', '2', '1', '1', 'CRUMB1'))

Answer 1

我认为你必须提交创建表的第一个语句，然后才能运行任何插入。尝试在两个SQL语句之间运行cn.commit()，看看是否能解决问题。

或者，在创建与数据库的初始连接时设置autocommit=True。

Answer 2

好的完整性，棘手的一点也是以字符串格式化方式输入字段名称。

我将代码分成两部分。

import psycopg2 as pq
import os

# Create the database
os.system('dropdb ptest')
os.system('createdb ptest')
# connect to the database
cn = pq.connect('dbname=ptest user=myname')
cr = cn.cursor()

# the wierd tuple at the EOL below is to preserve the list 
# lookup in case that is where the error is.
cr.execute('CREATE TABLE id1 (%s varchar, %s int PRIMARY KEY, %s int, %s int, %s varchar)' % tuple(['fund', 'sleeve_id', 'sub_id', 'level_id', 'Entity_id'])
SQL = 'INSERT INTO id1 (%s,%s,%s,%s,%s) VALUES' % tuple(['fund', 'sleeve_id', 'sub_id', 'level_id', 'Entity_id'])
SQL = SQL + ' (%s,%s,%s,%s,%s);'
data = tuple(['RHUBARB RHUBARB - RHUBARB RHUBARB', '2', '1', '1', 'CRUMB1'])
cr.execute(SQL,data)

并且工作正常并且（我相信）从SQL注入类型攻击中保持安全。

字符串格式化程序的python psycopg2内部错误

2 个答案: