[Koha-bugs] [Bug 20447] Add support for MARC holdings records

[bugzilla-daemon at bugs.koha-community.org]

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=20447

--- Comment #104 from Joonas Kylmälä <joonas.kylmala at helsinki.fi> ---
(In reply to Joonas Kylmälä from comment #103)
> #1 rule in my database course was always use the normal form for databases.
> It feels wrong to have the data in one place: twice the possibility of
> having bugs and also taking twice as much space. I read quickly
> https://stackoverflow.com/questions/2623852/why-are-joins-bad-when-
> considering-scalability and in the end the performance difference might not
> be that big. I would like you to provide performance benchmarks if we are
> going to use the non-normalized way.

Here is a few pages of reasoning why we should use the normal form:
https://mariadb.com/kb/en/library/database-normalization/ (unless there is a
significant performance gain)

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