[postgis-users] select a, b, c, case statement is not robust - no error message

[Simon Greener]

Do any of the left or right sides of a || pair return NULL?
Simon

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On 6 Jan 2021, 10:10, at 10:10, Shaozhong SHI <shishaozhong at gmail.com> wrote:
>Hi,
>
>One of my scripts worked very well, but for unknown reasons, it does
>not
>work.
>
>It is something like the following:
>
>select a, b, c, case statement as d from a_table;
>
>The case statement has a lot of cases, which are joined by using ||.
>
>Data is certainly there, but the result of case statement as d is
>empty.
>
>Any other robust way to deal with this?
>
>Can anyone enlighten me?
>
>Regards,
>
>David
>
>
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