Migration from Oracle TO MySQL
- From: Uwe Küchler <uwe@xxxxxxxxxxxx>
- To: oracle-l digest users <oracle-l@xxxxxxxxxxxxx>
- Date: Tue, 19 Mar 2013 16:33:44 +0100
Dear oracle-l'ers,
has anyone ever gone down the road of migrating an Oracle DB to MySQL?
I have this challenge currently, because a customer wants to migrate to
a software solution that runs on MySQL only.
The number of hits for a Google search is immense, but most of the stuff
goes either in the other (usual) direction or just gives some
commonplace suggestions.
Even if this won't be solved here, I thought that my research so far
could be of interest to others. So here's what I've done and found out
so far:
- MySQL Workbench is the usual tool of choice for migrations from other
database systems to MySQL. On mysql.com, some pages mention migrations
from Oracle, but most of them don't (there's just MS SQL, Sybase,
PostgreSQL and "Generic" ODBC sources).
If you try to use the migration wizard of MySQL Workbench (as of
5.2.47), it stops with an ODBC error. In the MySQL bug database, there's
a more or less "official" answer from Oracle: "Apologies but Migration
from Oracle DBs is not supported". (http://bugs.mysql.com/bug.php?id=66609)
- It looks as if the previous tool "MySQL Migration Toolkit" was able to
do that (and used JDBC instead of ODBC).
Has anyone ever tried this successfully?
- Then I considered DBVisit and similar replication tools as a means of
migrating data. On their homepage, it sounds like a replication from
scratch was possible. But a further look into the documentation
revealed, that both systems had to be "in sync" before replication could
start.
I suppose this isn't different with Golden Gate, although I haven't
double-checked that.
- DBconvert (DMSoft Technologies) takes like forever before it finally
freezes completely.
- Intelligent Converters wasn't even able to retrieve a list of schemas
and/or tables (and we're talking about some 150 tables only).
- Not tried yet: Spectral Core Full Convert
(http://www.spectralcore.com/fullconvert/tutorials/convert-oracle-to-mysql.php).
Looks promising, but that happened before... any experiences?
So, this is the status quo. I suspected that Oracle isn't very
interested in providing tools to migrate away from their core product,
but it strikes me that there aren't many other proven solutions around.
Cheers,
Uwe
--
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