Re: isnull() function in pgAdmin3

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От	Ken Tanzer
Тема	Re: isnull() function in pgAdmin3
Дата	3 октября 2016 г. 23:06:03
Msg-id	CAD3a31UsQ_JT7HZ_4+7fRrKF+SW8emXhbiGGjNbQRAMwPuWdQQ@mail.gmail.com обсуждение исходный текст
Ответ на	Re: isnull() function in pgAdmin3 (dudedoe01 <marsalanaq@gmail.com>)
Список	pgsql-general

Дерево обсуждения

On Mon, Oct 3, 2016 at 6:39 AM, dudedoe01 <marsalanaq@gmail.com> wrote:

What is the most feasible way to emulate the below MySQL function into
postgreSQL. Since the isnull() function is no longer supported in 9.6
version. I have tried every trick in the hat to get the desired results.
Still 'RPG INV' doesn't show only the other two then options show up.

(case
when
((`s`.`Funding_Date` = '')
and (isnull(`s`.`Actual_Close_Date`)
or (`s`.`Actual_Close_Date` = '')))
then
'RPG_INV'
when
((isnull(`s`.`Funding_Date`)
or (`s`.`Funding_Date` <> ''))
and ((`s`.`Actual_Close_Date` = '')
or isnull(`s`.`Actual_Close_Date`)))
then
'Builder_Inventory'
else 'Owner_Inventory'
end) AS `Lot_Status`

Hi. Over the years I have gotten a lot of patient assistance from this mailing list, for which I am abundantly grateful. In light of that, I offer the following "translations," which are specifically in response to your question about emulating the SQL above:

and (isnull(`s`.`Actual_Close_Date`)

--> and (`s`.`Actual_Close_Date` IS NULL)

((isnull(`s`.`Funding_Date`)

--> (`s`.`Funding_Date` IS NULL)

or isnull(`s`.`Actual_Close_Date`)))

-->or (`s`.`Actual_Close_Date` IS NULL)))

HTH, and Cheers.

Ken

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