[Koha] [koha] Authorized value for category_types

[Owen Leonard]

> WHERE  categories.category_type= <<CATEGORY|category_type>>

category_type is an odd one. It's not an authorized value. In fact I
don't think they're defined anywhere in the database at all, just
hard-coded into templates and scripts. They're intended to be fixed
values, not ones which can be modified.

I don't think there's any way to get an SQL report to generate a set
of options based on these values. It would be nice if one could supply
a set of user-defined options in a runtime parameter, e.g. <<Category
type|[{A:"Adult",C:"Child"}]>> but that would be complicated for
users. I think in your case you might have to rely on good
documentation in the report notes to let the user know which
category_type codes are valid.

 -- Owen

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