2

当我尝试使用 --local-infile 选项加载 CSV 数据文件时，我收到以下错误：

第 2 行的错误 1452 (23000)：无法添加或更新子行：外键约束失败 ( realtax. city_desc, CONSTRAINT city_desc_ibfk_1FOREIGN KEY ( cityid) REFERENCES city( id) ON DELETE CASCADE ON UPDATE CASCADE)

错误发生在 CSV 文件的第一行（即，根本没有加载任何行）。

这是实际的mysql加载命令：

load data LOCAL infile 'out/desc.in' into table city_desc fields terminated by ',' lines terminated by '\n';

这是 CSV 文件的第一行：

# head -1 out/desc.in
NULL,1000,"R4","B1","NWC125","SUNRISE ACRES #1 W 120 FT OF S 75",0.207

但是，当我使用 mysql CLI 时，我可以毫无问题地加载第一行。结果如下：

mysql> 插入 city_desc 值 (NULL,1000,"R4","B1","NWC125","SUNRISE ACRES #1 W 120 FT OF S 75",0.207);
查询正常，1 行受影响（0.04 秒）

这是它所引用的表数据行：

mysql> select * from city limit 1;
+--------+---------+-----------------+
| 编号 | 道具ID | pidn |
+--------+---------+-----------------+
| 1000 | 10208 | S912999001L0800 |
+--------+---------+-----------------+
1 行在集合中（0.00 秒）

以下是每个表的 SQL 定义：

create table if not exists city 
(
    id              INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
    prop_id         int,
    pidn            varchar(100)
) AUTO_INCREMENT=1000, engine=innodb;

create table if not exists city_desc
(
    id INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
    cityid          int not null,
    zoning          varchar(20), 
    state_cd        varchar(20), 
    map_id          varchar(20), 
    legal_desc      varchar(100), 
    legal_acres     numeric(5,5),
    foreign key (cityid) references city(id)
    on update cascade on delete cascade
) AUTO_INCREMENT=500000, engine=innodb;

create index propid_city on city(prop_id);
create index pidn_city on city(pidn);

我阅读了其他关于关闭引用检查的线程：

SET foreign_key_checks = 0;

但我不想破解修复程序，而是想知道手动工作但不能使用 --local-infile 选项的原因。外国参考文献在那里（记录 id 1000），为什么它不起作用？

更新：这是我在插入失败后立即运行 SHOW ENGINE INNODB STATUS 后收到的信息：

------------------------
LATEST FOREIGN KEY ERROR
------------------------
121212 13:50:55 Transaction:
TRANSACTION 0 901853, ACTIVE 0 sec, process no 3217, OS thread id 140224990570240 inserting, thread declared inside InnoDB 492
mysql tables in use 1, locked 1
5 lock struct(s), heap size 1216, 9 row lock(s), undo log entries 9
MySQL thread id 15389, query id 1442612 localhost root
load data LOCAL infile 'out/desc.in' into table city_desc fields terminated by ',' lines terminated by '\n'
Foreign key constraint fails for table `realtax`.`city_desc`:
,
  CONSTRAINT `city_desc_ibfk_1` FOREIGN KEY (`cityid`) REFERENCES `city` (`id`) ON DELETE CASCADE ON UPDATE CASCADE
Trying to add in child table, in index `cityid` tuple:
DATA TUPLE: 2 fields;
 0: len 4; hex 80000000; asc     ;; 1: len 4; hex 800ea15e; asc    ^;;

But in parent table `realtax`.`city`, in index `PRIMARY`,
the closest match we can find is record:
PHYSICAL RECORD: n_fields 5; compact format; info bits 0
 0: len 4; hex 800003e8; asc     ;; 1: len 6; hex 00000007aed1; asc       ;; 2: len 7; hex 800000002d0110; asc     -  ;; 3: len 4; hex 800027e0; asc   ' ;; 4: len 15; hex 533931323939393030314c30383030; asc S912999001L0800;;
4

2 回答 2

1

您需要跳过 CSV 文件中的第一行，添加IGNORE number LINES选项。

load data LOCAL infile 'out/desc.in'
into table city_desc
fields terminated by ','
lines terminated by '\n'
ignore 1 lines;
于 2012-12-12T20:17:47.067 回答
0

根据您提供的信息，该行不应该产生任何问题。因此，快速提问：csv 中有多少行？如果多于 1 行，是否至少其中之一包含不在主键中的外键值？
如果该行确实包含数据数据，则该错误肯定不在该行上；它在不同的行上。

于 2012-12-12T22:47:04.067 回答