On 01/16/2011 11:00 AM, Andrus Moor wrote:
Andy,

SELECT COALESCE(MAX(nullif(substring( substring(tasudok from 7), 
'^[0-9]*'),'')::int),0)+1
FROM invoice
where date= ?invoicedate

is used to get next free invoice number if new invoice is saved.

If multiple invoices are saved concurrently from different processes, they will 
probably get same number.

I understand this is a business rule, and you cant change it.

Yes. This is customer requirement and I cannot change it.
OR... can you go back to your customer and tell them they wont like this.  
Really really they should let you do it correctly.  I find people dont change 
because they dont have to, not because there is an actual reason.  Many times, 
given a description of how hard and how messy something will be to code, I have 
convinced people that a simple business change and simple code is really the 
best approach.  But I have hit walls.  Things I could not change, but I did try.


Is it reasonable/how to implement the following:

Sorry, I have no idea.

-Andy

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