November 23, 2008 01:10am pst

1. angelIII 840,951
2. hielo 463,136
3. routinet 275,450
4. hernst42 254,855
5. ee_rlee 219,254
6. mankowitz 206,587
7. ushastry 186,962
8. yodercm 155,304
9. fibo 133,310
10. cedlinx 128,742
11. Ray_Pas... 127,511
12. virmaior 126,822
13. leannonn 110,570
14. cxr 88,568
15. adrpo 87,450
16. TerryAtO... 81,800
17. logudotcom 81,165
18. mark_wills 75,635
19. theGhost... 75,523
20. arnold 75,419
21. TomasHelgi 73,674
22. bportlock 72,239
23. nplib 70,560
24. mattaob 69,744
25. teraplane 65,970

1. angelIII 2,196,790
2. todd_far... 1,724,617
3. snoyes_jw 765,508
4. Raynard7 704,144
5. hernst42 613,555
6. Squeebee 555,077
7. leannonn 489,506
8. hielo 467,736
9. ushastry 392,464
10. NovaDeni... 373,934
11. routinet 373,655
12. akshah123 327,468
13. psadac 320,695
14. virmaior 319,088
15. AdrianSRU 317,146
16. yodercm 313,173
17. mankowitz 298,809
18. fibo 277,443
19. ee_rlee 219,254
20. teraplane 193,956
21. ldbkutty 184,558
22. racek 181,131
23. steelseth12 177,995
24. glcummins 176,290
25. gamebits 173,436

08.19.2008 at 09:27AM PDT, ID: 23660223

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8.1

MYSQL error: Cannot delete or update a parent row: a foreign key constraint fails while trying to Drop a table.

Asked by vamsinadella in MySQL Server

Tags: MYSQL, MYSQL Query Browser, Cannot delete or update a parent row: a foreign key constraint fails 1217

Hi,

I have a problem that i'm not able to drop a table. I did this a lot of times but this time it is throwing me this error as mentioned below and just not letting me to drop the table. Ther code snippet is given. I just want to drop the Footnotes table and re-create it.Here is the error:

"Cannot delete or update a parent row: a foreign key constraint fails" 1217

Can somebody please look at my code and help where I'm going wrong. The tables are as given below.

Thanks a bunch,

--V
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             DROP TABLE IF EXISTS `perepository`.`FootnoteCategory`;
CREATE TABLE  `perepository`.`FootnoteCategory` (
  `Category_Id` int(10) unsigned NOT NULL auto_increment,
  `Category` varchar(100) default NULL,
  `Description` varchar(255) default NULL,
  `LastUpdate` datetime default NULL,
  `UpdatedBy` varchar(100) default NULL,
  PRIMARY KEY  (`Category_Id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
 
DROP TABLE IF EXISTS `perepository`.`Footnotes`;
CREATE TABLE  `perepository`.`Footnotes` (
  `Footnote_Id` int(10) unsigned NOT NULL auto_increment,
  `Category_Id` int(10) unsigned default NULL,
  `Footnote` text,
  `Status` varchar(20) NOT NULL,
  `DateCreated` date default NULL,
  `LastUpdate` datetime default NULL,
  `UpdatedBy` varchar(100) default NULL,
  PRIMARY KEY  (`Footnote_Id`),
  KEY `Footnotes_FKIndex1` (`Category_Id`),
  CONSTRAINT `FK_Footnotes_1` FOREIGN KEY (`Category_Id`) REFERENCES `FootnoteCategory` (`Category_Id`) ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
 
DROP TABLE IF EXISTS `perepository`.`HCL_Footnote_Mapping`;
CREATE TABLE  `perepository`.`HCL_Footnote_Mapping` (
  `Mapping_Id` int(10) unsigned NOT NULL auto_increment,
  `Footnote_Id` int(10) unsigned NOT NULL,
  `Request_Id` int(10) unsigned NOT NULL,
  PRIMARY KEY  (`Mapping_Id`),
  UNIQUE KEY `UniqueIndex_1` (`Footnote_Id`,`Request_Id`),
  KEY `FK_HCL_Footnote_Mapping_2` (`Request_Id`),
  CONSTRAINT `FK_HCL_Footnote_Mapping_1` FOREIGN KEY (`Footnote_Id`) REFERENCES `Footnotes` (`Footnote_Id`) ON DELETE CASCADE ON UPDATE CASCADE,
  CONSTRAINT `FK_HCL_Footnote_Mapping_2` FOREIGN KEY (`Request_Id`) REFERENCES `HCLRequest` (`Request_Id`) ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=latin1;

           
         

Keywords: MYSQL error: Cannot delete or updat…

	Title
1	Foreign Keys with MySql DB
2	Foreign Key Constraint Question
3	Cannot delete or update a parent row…
4	Mysql how to drop a foreign key
5	How to set up a foreign key using php…
6	Delete a foreign key

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20080716-EE-VQP-32 / EE_QW_2_20070628

MYSQL error: Cannot delete or update a parent row: a foreign key constraint fails while trying to Drop a table.

Asked by vamsinadella in MySQL Server

Tags: MYSQL, MYSQL Query Browser, Cannot delete or update a parent row: a foreign key constraint fails 1217

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