I have not tested it, but in the list of functions this tool seems to want if you want:
http://metacpan.org/pod/SQL::Translator::Manual
* FIND DIFFERENCES BETWEEN TWO SCHEMES As mentioned above, the sqlt-diff schema considers two schemas and creates SQL schema modification instructions that can be used to convert the first schema to the second. The flag syntax is somewhat fancy:
$ sqlt-diff foo-v1.sql = MySQL foo-v2.sql = Oracle> diff.sql *
tool homepage: http://sqlfairy.sourceforge.net/
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