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POIs there a way to effect user defined data types in MySQL?
 

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    <p>I have a database which stores (among other things), the following pieces of information:</p> <ul> <li>Hardware IDs <code>BIGINT</code>s</li> <li>Storage Capacities <code>BIGINT</code>s</li> <li>Hardware Names <code>VARCHAR</code>s</li> <li>World Wide Port Names <code>VARCHAR</code>s</li> </ul> <p>I'd like to be able to capture a more refined definition of these datatypes. For instance, the hardware IDs have no numerical significance, so I don't care how they are formatted when displayed. The Storage Capacities, however, are cardinal numbers and, at a user's request, I'd like to present them with thousands and decimal separators, e.g. 123,456.789. Thus, I'd like to refine <code>BIGINT</code> into, say <code>ID_NUMBER</code> and <code>CARDINAL</code>.</p> <p>The same with Hardware Names, which are simple text and WWPNs, which are hexstrings, e.g. 24:68:AC:E0. Thus, I'd like to refine <code>VARCHAR</code> into <code>ENGLISH_WORD</code> and <code>HEXSTRING</code>.</p> <p>The specific datatypes I made up are just for illustrative purposes.</p> <p>I'd like to keep all this information in one place and I'm wondering if anybody knows of a good way to hold this all in my MySQL table definitions. I <em>could</em> use the Comment field of the table definition, but that smells fishy to me.</p> <p>One approach would be to define the data structure elsewhere and use that definition to generate my <code>CREATE TABLE</code>s, but that would be a major rework of the code that I currently have, so I'm looking for alternatives.</p> <p>Any suggestions? The application language in use is Perl, if that helps.</p>
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    1. USbrian d foy
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    1. COUpgrade to postgres? :)
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