Solved

add MySQL primary key

Posted on 2015-02-09
7
183 Views
Last Modified: 2015-02-11
dear all,

right now have structure like this of a table :

CREATE TABLE `tblInventory` (
  `ID` int(11) NOT NULL DEFAULT '0',
  `Parent` int(11) DEFAULT NULL,
  `SNMPName` varchar(30) DEFAULT NULL,
  `Make` varchar(100) DEFAULT NULL,
  `Model` varchar(100) DEFAULT NULL,
  `Part` varchar(30) DEFAULT NULL,
  `Serial` varchar(20) DEFAULT NULL,
  `VendorCircuitID` varchar(100) DEFAULT NULL,
  `VendorID` int(11) DEFAULT NULL,
  `DataRateSDH` char(1) NOT NULL DEFAULT '0',
  `DataRateType` varchar(10) DEFAULT NULL,
  `DataRate` decimal(11,3) DEFAULT NULL,
  `DataRateUnit` char(4) DEFAULT NULL,
  `DataRateVC12` bigint(20) unsigned DEFAULT '0',
  `RestorationUse` tinyint(1) DEFAULT '0',
  `UnderInstallation` tinyint(1) DEFAULT '0',
  `TriggerAction_Audit` varchar(10) DEFAULT NULL,
  `ActionDone_Audit` char(10) DEFAULT NULL,
  `ActionTime_Audit` datetime DEFAULT NULL,
  `ActionByHost_Audit` varchar(50) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1;

Open in new window


and now we want to add one more column to this talbe:

RecordVersion_Audit BIGINT NOT NULL AUTO_INCREMENT; 

Open in new window


however, we need to define that column as a key, but when I do this:

ALTER TABLE xxx.yyy ADD RecordVersion_Audit BIGINT NOT NULL primary key;

it report:

Lookup Error - MySQL Database Error: Duplicate entry '0' for key 'PRIMARY'

Open in new window


any way to fix this ?
0
Comment
Question by:marrowyung
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 5
7 Comments
 
LVL 1

Author Comment

by:marrowyung
ID: 40597883
can I just do this :

ALTER TABLE xxx.yyy ADD RecordVersion_Audit BIGINT NOT NULL AUTO_INCREMENT UNIQUE;  

Open in new window

?
0
 
LVL 143

Accepted Solution

by:
Guy Hengel [angelIII / a3] earned 500 total points
ID: 40597899
the error tells you that you already HAVE several records with the value of "0", adding the field with auto_increment will not populate the field as if you had inserted the records after having that field set;

to solve this, you have several ways, the most simple shall be to copy the data to another table, delete it from this table, and reinsert back from the backup table.
0
 
LVL 1

Author Comment

by:marrowyung
ID: 40600253
"HAVE several records with the value of "0", "

but why relate to the primary key/key ? that's why I don't understand.

" if you had inserted the records after having that field set;
"

you mean this field will not have the auto increment effect for old record?

"to solve this, you have several ways, the most simple shall be to copy the data to another table, delete it from this table, and reinsert back from the backup table. "

I solve that by one statement I post above, near that version but not exactly .
0
Monthly Recap

May was a big month for new releases from Linux Academy! Take a look at what our team built recently in our blog. You can access the newest releases from our blog.

 
LVL 1

Author Closing Comment

by:marrowyung
ID: 40600254
tks anyway even I fix it last night.

I fix it BASICALLY by trial and error. AHHAHAH
0
 
LVL 11

Expert Comment

by:Dany Balian
ID: 40600276
You can also add the field as non primary key.. Update the table using a function, and then set the pkey fields again!

Something like update xxx set recordversion_audit = getnextpkey() where recordversion_audit=0

And getnextpkey would be a function that returns the max+1 from same table xxx

Just saying!
0
 
LVL 1

Author Comment

by:marrowyung
ID: 40600376
I just remove the field and add it back using a statement VERY LIKE the one in my update, and it just work, confirmed by developer.

that's  simple enough.
0
 
LVL 1

Author Comment

by:marrowyung
ID: 40602574
0

Featured Post

Microsoft Certification Exam 74-409

Veeam® is happy to provide the Microsoft community with a study guide prepared by MVP and MCT, Orin Thomas. This guide will take you through each of the exam objectives, helping you to prepare for and pass the examination.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

When table data gets too large to manage or queries take too long to execute the solution is often to buy bigger hardware or assign more CPUs and memory resources to the machine to solve the problem. However, the best, cheapest and most effective so…
This post looks at MongoDB and MySQL, and covers high-level MongoDB strengths, weaknesses, features, and uses from the perspective of an SQL user.
In this brief tutorial Pawel from AdRem Software explains how you can quickly find out which services are running on your network, or what are the IP addresses of servers responsible for each service. Software used is freeware NetCrunch Tools (https…
This tutorial will teach you the special effect of super speed similar to the fictional character Wally West aka "The Flash" After Shake : http://www.videocopilot.net/presets/after_shake/ All lightning effects with instructions : http://www.mediaf…

691 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question