Question

我是python的新手，我似乎无法弄清楚为什么我会收到此错误。它告诉我我有太多的参数，但表有8列，我传递了8个参数。到底是怎么回事？这个错误可能会产生误导，而真正的问题是我尝试使用None传递可能为Boolean或可能属于%s类型的值吗？

以下是代码段

        db.cursor().execute("CREATE TABLE temp_clean_mp_duplicates (id bigint, distinctid character varying(255), created timestamp without time zone, email character varying(255), created_exist boolean, email_exist boolean, user_exist boolean, distinct_id_found boolean, CONSTRAINT temp_clean_mp_duplicates_pkey PRIMARY KEY(id));")

        mp_email = None
        email_exist = False
        if "$email" in mp_properties :
            mp_email = mp_properties["$email"]
            email_exist = True

        mp_distinct_id = result["$distinct_id"]
        db_cursor.execute("SELECT u.id, u.email, udm.distinctid, u.sessionId FROM users as u,user_distinctid_map as udm where u.id = udm.user_id and udm.distinctid = %s and lower(email) = lower(%s)", (mp_distinct_id,mp_email,))
        distinct_id_found = True
        if db_cursor.rowcount == 0 :
            distinct_id_found = False

        created = None
        created_exist = False
        if "$created" in mp_properties :
            created = mp_properties["$created"]
            created_exist = True



            db_cursor.execute("SELECT u.id, u.email, u.sessionId FROM users as u where lower(u.email) = lower(%s)", (mp_email,))
            user_id = 0
            user_exist = False
            if db_cursor.rowcount > 0 :
                user_id = db_cursor.fetchone()[0]
                user_exist = True

            db.cursor().execute("INSERT INTO temp_clean_mp_duplicates (id, distinctid, created, email) VALUES (%s,%s,%s,%s,%s,%s,%s,%s);", (user_id, mp_distinct_id, created, mp_email, created_exist, email_exist, user_exist, distinct_id_found))

Answer 1

正如您所发现的，问题确实是INSERT声明：

INSERT INTO temp_clean_mp_duplicates (id, distinctid, created, email) VALUES (%s,%s,%s,%s,%s,%s,%s,%s);", (user_id, mp_distinct_id, created, mp_email, created_exist, email_exist, user_exist, distinct_id_found)

您确定表有八列，但您告诉SQL您只有设置其中四列INSERT INTO temp_clean_mp_duplicates (id, distinctid, created, email) - 括号中的列是它将尝试设置的列。

以下是我对INSERT语句的看法：

INSERT INTO <tablename> (<target columns>) VALUES (<values on new row>)

因此，如果您尝试设置所有八个，则需要将所有列名称放在括号中：

INSERT INTO temp_clean_mp_duplicates (id, distinctid, created, email, created_exist, email_exist, user_exist, distinct_id_found) VALUES (%s,%s,%s,%s,%s,%s,%s,%s);", (user_id, mp_distinct_id, created, mp_email, created_exist, email_exist, user_exist, distinct_id_found)

以上查询应该有效。

Python：psycopg2.ProgrammingError：INSERT的表达式多于目标列

1 个答案: