Re: syntax sugar for conditional check

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От Jim Nasby
Тема Re: syntax sugar for conditional check
Дата
Msg-id 56FEB3BD.9070305@BlueTreble.com
обсуждение исходный текст
Ответ на syntax sugar for conditional check  (Alexander Ostrow <aj@epcylon.com>)
Ответы Re: syntax sugar for conditional check  (Tom Lane <tgl@sss.pgh.pa.us>)
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On 3/31/16 12:19 PM, Alexander Ostrow wrote:
> Hello,
>
> I thought it would be cool to have conditional check syntax, which gets
> converted to simple check constraint syntax.
>
> Here’s a gist:
>
> https://gist.github.com/aj0strow/5a07f2ddcad324c4dac2c4095c821999
>
> It’s just sugar, but i think it would make check constraints easier to
> read, and easier to write without backwards boolean logic.

Rather than this, I think an exclusive-or operator would be a lot more 
useful. The only difficulty I run into with CHECK constaints is when I 
want to ensure that only ONE condition is true.
-- 
Jim Nasby, Data Architect, Blue Treble Consulting, Austin TX
Experts in Analytics, Data Architecture and PostgreSQL
Data in Trouble? Get it in Treble! http://BlueTreble.com



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