How to find the ISO-2022-JP escape sequence
Any suggestions(a tool or a Java Program) for finding the escape sequence of any given character in IS-2022-JP.
For example I am trying to find the escape sequence for "�" charater.
Luis Cabral wrote:
However, one single sequence would have exactly the same practical result and would be 200x easier to create and maintain.But keep serialisation in mind. A sequence is a single object that needs to service multiple callers, providing each caller with a unique number. So this object needs to support parallel calls (i.e. it needs to be threaded in plain programming terms).
At the same time, each of these "threads" need to ensure that they do not hand out duplicate numbers - so they need to serialise between themselves to decide who gets what unique range of numbers to hand out.
So the more intensely a sequence is used, the bigger the likelihood of potential serialisation. So there are performance considerations.
There's also data management considerations. Do you want a table to rely on an object such as a sequence that is shared by a number of other tables? Or do you want that table to basically "own" that sequence and not have shared dependencies?
The only reason you might need a separate sequence would be when the generated number is displayed and is somehow meaningful to the user (e.g. an order ID.) But if the number is only used internally to join FKs to PKs, I don't see the need to have a separate sequence for each table.I would not call a sequence number itself, "meaningful" in anyway. It's only purpose when used as a surrogate key is uniqueness - not identification/interpretation is some way that provides some kind of (abstract) meaning.
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