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Feb 9th, 2009
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About Unique Constraint

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Hello,
I want to check uniqueness of id at the time of entry only.And I want to give message to the user at that time only.How to do this?
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srs_grp is offline Offline
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Re: About Unique Constraint

Either you generate the Id and assign it to the user yourself using an autoincrement or a UUID feature, but if you want the user to select his own ID you will have to perform a check in your records (database or files) to check if the ID has already been chosen by someone else.
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Re: About Unique Constraint

Click to Expand / Collapse  Quote originally posted by stephen84s ...
Either you generate the Id and assign it to the user yourself using an autoincrement or a UUID feature, but if you want the user to select his own ID you will have to perform a check in your records (database or files) to check if the ID has already been chosen by someone else.

yes.. but the problem is where should I perform this check,so that I can immediately inform user abt constraint violation.
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Re: About Unique Constraint

That depends, what are you working on right now, what type of application is it ? A web page, Swing form ? You want specific answers but you haven't yet given details specific to your application.
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stephen84s is offline Offline
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This thread is more than three months old

No one has posted to this discussion for at least three months. Please let old threads die and do not reply to them unless you feel you have something new and valuable to contribute that absolutely must be added to make the discussion complete. Otherwise, please start a new thread in this forum instead.
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