mysql -> Oracle

We have to look at ,igrating data from an existing system that was built using mysql. Was in two minds where to post this to or whether to crosspost  but decided to ask here first.

Does anyone know of any utilities that will enable a mysql schema to be loaded into Oracle (we're talking 9iR2 and/or 10gR2 here)? It doesn't have to be sophisticated (no problem to have manual steps) but would be great if can be achieved.

Thanks for all suggestions.         

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jeremy