python 操作postgres

python 操作postgres

问题描述

psycopg2.ProgrammingError: no results to fetch

import psycopg2


def exe_data(name, age):
    sql = cur.execute('INSERT INTO sample_table VALUES(%s, %s)', (name, age))
    # 执行sql
    cursor.execute(sql)
    data = cursor.fetchall() 
    
# 连接数据库
conn = psycopg2.connect(database = 'map-dev', user = 'postgres', password = '123456', host = '192.168.1.12', port = '5432')
cursor=conn.cursor()
exe_data("name","wm")
# 关闭指针,数据库
cursor.close()
conn.close()

实践中发现：cursor.fetchall() 修改成cursor.fetchone() 依旧会报错
正确的解决方法：cursor.fetchall()注释调，新增conn.commit()

import psycopg2


def exe_data(name, age):
    sql = cur.execute('INSERT INTO sample_table VALUES(%s, %s)', (name, age))
    # 执行sql
    cursor.execute(sql)
    # data = cursor.fetchall() 
    
# 连接数据库
conn = psycopg2.connect(database = 'map-dev', user = 'postgres', password = '123456', host = '192.168.1.12', port = '5432')
cursor=conn.cursor()
exe_data("name","wm")
# （新增）提交
conn.commit()
# 关闭指针,数据库
cursor.close()
conn.close()

数据库刷新可获取最新的插入内容

psycopg2的bug

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