Databases
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    1. POWhy should you ever have to care whether an object reference is an interface or a class?
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    1. USChris Lercher
    1. USChris Lercher
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      1. VTUpMod
    1. CONot sure what you mean by "get objects". That sounds like you'd type dependencies to classes, which is just what you shouldn't do in my opinion. You're definitely correct about the necessity of differentiating types when browsing through code but, as implied, any modern IDE should take care of that in the UI. The question is why would you care whether your object reference is typed to a class or an interface? Anyway, thanks for your answer!
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      1. USMarcus Stade
    2. CO@macke: With "get objects", I mean anywhere, looking at any line of code, not just in the signatures of methods. Now, when I look at a line, I can ask myself: The type hierarchy of classes (especially in languages without multiple inheritance) implies a strong categorization, like "it's first and foremost a Person". Whereas an interface just says something like "and by the way, the object also implements these methods". It's like reading a book: We're constantly trying to understand the context and use any hint to ask: What does the author probably mean?
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      1. USChris Lercher
    3. COAnother thing is that if `Foo` and `Bar` are class types, whether any type can satisfy both constraints depends solely upon whether either type is derived from the other. By contrast, if either or both is an interface type, then unless the other is a sealed type, one would generally have to examine all types in the system to be certain that none could satisfy both constraints.
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      1. USsupercat
 

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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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