Need alter constraint syntax for check constraint


I can't get this thing to work.  I have added a new condition 'Billing Maintenance' and need to recompile the contraint.  Do I have to drop it and add it?  Do I need to drop the table and recreate it with the new value?  It looks like all you can do with a alter constraint is turn it on and off.   How do I do this.

ALTER TABLE ctms.requesttyperef MODIFY CONSTRAINT ck_requestflag
IN('Billing Maintenance','Deploy','Redeploy','Account Maintenance',
'Account Service','Supplies Maintenance', 'Third Party Equipment Billing'
,'Do Not Process','Customer Owned Services','Deploy Peripherals',
'Leasing Services','Convert','Internet Services','Salesperson Deploy'
,'Front End Conversion');
LVL 1
DonFreemanAsked:
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ser6398Connect With a Mentor Commented:
Try the following:

ALTER TABLE ctms.requesttyperef MODIFY CONSTRAINT ck_requestflag CHECK (requestflag IN ('Billing Maintenance','Deploy','Redeploy','Account Maintenance', 'Account Service','Supplies Maintenance', 'Third Party Equipment Billing', 'Do Not Process','Customer Owned Services','Deploy Peripherals',
'Leasing Services','Convert','Internet Services','Salesperson Deploy', 'Front End Conversion'));
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leolkkCommented:
If there are NEW values,
1) i am used to drop the "CONSTRAINT" first.
2) after updating corresponding data. I will then add a new constraint.

If there is NO new values,
1) I turn it off
2) update data
3) turn it on again
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