I've used the other posts on this topic, but I'm having no luck.
Here's the code I execute:
UPDATE tblOrderItems SET `ItemID` = 0004 WHERE `OrderNum`= 203 AND `OrderItemID` = 26
Here's my error:
Error Code: 1452. Cannot add or update a child row: a foreign key constraint fails (`cai0066`.`tblOrderItems`, CONSTRAINT `ItemID` FOREIGN KEY (`ItemID`) REFERENCES `tblCatalogItems` (`ItemID`))
Notes:
INSERT
or UPDATE
into tblOrderItems
. tblCatalogItems
does have an ItemID
of 0004
. See: thisHere are the create statements generated by MySQL Workbench:
delimiter $$
CREATE TABLE `tblCatalogItems` (
`ItemID` varchar(10) NOT NULL DEFAULT '',
`ItemName` varchar(50) DEFAULT NULL,
`Wholesale` decimal(10,2) DEFAULT NULL,
`Cost5-10` decimal(10,2) DEFAULT NULL,
`Cost11-19` decimal(10,2) DEFAULT NULL,
`Cost20` decimal(10,2) DEFAULT NULL,
`Retail` decimal(10,2) DEFAULT NULL,
PRIMARY KEY (`ItemID`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1$$
delimiter $$
CREATE TABLE `tblItemCosts` (
`Cost` decimal(10,2) DEFAULT NULL,
`VendorID` int(11) NOT NULL,
`ItemID` varchar(10) NOT NULL,
KEY `VendorID_idx` (`VendorID`),
KEY `ItemID_idx` (`ItemID`),
CONSTRAINT `VendorID` FOREIGN KEY (`VendorID`) REFERENCES `tblVendors` (`VendorID`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=InnoDB DEFAULT CHARSET=latin1$$
delimiter $$
CREATE TABLE `tblOrderItems` (
`OrderItemID` int(11) NOT NULL AUTO_INCREMENT,
`OrderNum` int(11) NOT NULL,
`PayPalTxnID` int(10) DEFAULT NULL,
`Description` varchar(225) DEFAULT NULL,
`Quantity` int(11) DEFAULT NULL,
`UnitPrice` decimal(10,2) DEFAULT NULL,
`ItemStatus` varchar(30) DEFAULT NULL,
`TrackingNumber` varchar(50) DEFAULT NULL,
`ShippingCost` decimal(10,2) DEFAULT NULL,
`ItemID` varchar(50) DEFAULT NULL,
`TotalPrice` decimal(10,2) DEFAULT NULL,
PRIMARY KEY (`OrderItemID`,`OrderNum`),
UNIQUE KEY `PayPalTxnID_UNIQUE` (`PayPalTxnID`),
KEY `PayPalTxnID_idx` (`PayPalTxnID`),
KEY `UnitPrice_idx` (`ItemID`),
KEY `OrderNum_idx` (`OrderNum`),
CONSTRAINT `ItemID` FOREIGN KEY (`ItemID`) REFERENCES `tblCatalogItems` (`ItemID`),
CONSTRAINT `OrderNum` FOREIGN KEY (`OrderNum`) REFERENCES `tblOrders` (`OrderNum`) ON DELETE CASCADE ON UPDATE CASCADE,
CONSTRAINT `UnitPrice` FOREIGN KEY (`ItemID`) REFERENCES `tblCatalogItems` (`ItemID`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=InnoDB AUTO_INCREMENT=7678 DEFAULT CHARSET=latin1$$
delimiter $$
CREATE TABLE `tblOrderItemStatus` (
`OrderItemID` int(11) NOT NULL,
`OrderDate` varchar(12) DEFAULT NULL,
`DesignProofSent` varchar(12) DEFAULT NULL,
`SubmittedToProduction` varchar(12) DEFAULT NULL,
`InProduction` varchar(12) DEFAULT NULL,
`Shipped` varchar(12) DEFAULT NULL,
PRIMARY KEY (`OrderItemID`),
UNIQUE KEY `OrderItemID_UNIQUE` (`OrderItemID`),
KEY `OrderItemID_idx` (`OrderItemID`),
CONSTRAINT `OrderItemID` FOREIGN KEY (`OrderItemID`) REFERENCES `tblOrderItems` (`OrderItemID`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=InnoDB DEFAULT CHARSET=latin1$$
delimiter $$
CREATE TABLE `tblOrders` (
`OrderNum` int(11) NOT NULL AUTO_INCREMENT,
`PayPalTxnID` int(10) DEFAULT NULL,
`OrderDate` varchar(50) DEFAULT NULL,
`OrderStatus` varchar(10) DEFAULT 'New',
`RushFlag` bit(1) DEFAULT b'0',
`ShipName` varchar(50) DEFAULT NULL,
`ShipEmail` varchar(100) DEFAULT NULL,
`ShipAddress1` varchar(50) DEFAULT NULL,
`ShipAddress2` varchar(50) DEFAULT NULL,
`ShipCity` varchar(50) DEFAULT NULL,
`ShipState` char(2) DEFAULT NULL,
`ShipZip` varchar(10) DEFAULT NULL,
`ShippingCharge` decimal(10,2) DEFAULT NULL,
`TotalCost` decimal(10,2) DEFAULT NULL,
PRIMARY KEY (`OrderNum`),
UNIQUE KEY `PayPalTxnID_UNIQUE` (`PayPalTxnID`)
) ENGINE=InnoDB AUTO_INCREMENT=346 DEFAULT CHARSET=latin1$$
delimiter $$
CREATE TABLE `tblVendors` (
`VendorID` int(11) NOT NULL,
`VendorName` varchar(50) DEFAULT NULL,
PRIMARY KEY (`VendorID`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1$$
I tried the suggestion in this relevant post, but there were no results. This is a new database that hasn't actually been used yet; I've just filled it with fake data. Any ideas would be greatly appreciated.
There is a foreign key constraint on tblOrderItems
that its ItemID
needs to reference an ItemID
that already exists in tblCatalogItems
.
CONSTRAINT `ItemID` FOREIGN KEY (`ItemID`) REFERENCES `tblCatalogItems` (`ItemID`),
The message only means that you're trying to update tblOrderItems
to reference the item in tblCatalogItems
with ItemID
= 0004, but that item does not exist.
Since ItemID
is a varchar, you probably want to quote the 0004
or it may be converted to an int 4
before conversion to varchar. That may be your problem if the row with ItemID
= 0004 actually exists.
UPDATE tblOrderItems SET `ItemID` = '0004' WHERE `OrderNum`= 203 AND `OrderItemID` = 26