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case when equivalent

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This commit is contained in:
Daniel Hutzel
2025-07-16 13:49:45 +02:00
parent bd5a57189d
commit b55cce3e63
1 changed files with 6 additions and 2 deletions
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8
bookshop/srv/x-validation.cds
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@@ -8,8 +8,12 @@ using from '../db/schema';
view Books.constraints as select from Books { ID, view Books.constraints as select from Books { ID,
// two-step mandatory check // two-step mandatory check
title = null ? 'is missing' : trim(title)='' ? 'must not be empty' : case
null as title, when title is null then 'is missing'
when trim(title)='' then 'must not be empty'
end as title,
// the above is equivalent to:
// title is null ? 'is missing' : trim(title)='' ? 'must not be empty' :
// range check // range check
stock < 0 ? 'must not be negative' : stock < 0 ? 'must not be negative' :