http://www.agiledata.org/essays/mappingObjects.html#MapEachClassToTable
I'm having a tough time figuring out how to join a (subclass's) table
whose name comes from a column value.
Assuming this is the right way to go about it, how would I join the
Person superclass to the Employee subclass?
Person
------------------------------------------
ID Name Type
1 Jamie Jackson Employee <-- used in join
------------------------------------------
Employee
------------------------------------------
ID Salary
1 1000000.00
------------------------------------------
I can't just do...
SELECT t1.Name, t2.Salary
FROM Person t1 LEFT JOIN Employee t2 t1.Id = t2.Id
WHERE t1.ID = 1 ^^^^^^^^
... Since I don't know the ("Employee") table name until after a
query.
Is there a SQL (preferably vanilla) trick to doing this dynamic join
in a single query, or do I have to use multiple queries (or sprocs)?
Alternatively, should I wimp out and use views (which would likely be
reused for reporting)?
Thanks,
Jamie
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