Question

DISABLE VALIDATE

Asked by: it-rex

Hello experts
Do you guys have any real life experience with DISABLE VALIDATE constraint
when they are really used ?
what is the significance of having them?
some real life scenarios will help

thanks alot

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Asked On
2009-10-29 at 13:23:59ID24856148
Tags

DISABLE VALIDATE

Topic

Oracle Database

Participating Experts
2
Points
500
Comments
2

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Answers

 

by: mohammadzahidPosted on 2009-10-29 at 14:04:17ID: 25698247

Normally used to speed up import process. If you are 100% that data is not corrupted, then import can be done faster on a large table by disabling constraints. After data is imported, than you can alter constraint to ENABLE.

Generally speaking, it is not a good practise to disable constraints.

 

by: franckpachotPosted on 2009-10-29 at 15:38:44ID: 25698928

DISABLE VALIDATE forbid any DML that can be concerned by the constraint: you don't want the constraint to be checked but you want to keep data valid.
mohammadza is probably talking about ENABLE NOVALIDATE (you don't want to verify existing data but enable the constraint for future DML)
Regards,
Franck.

20120131-EE-VQP-002

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