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From Tore Halset <>
Subject types.xml, psql and oid/bytea
Date Thu, 07 Dec 2006 10:13:49 GMT

I want to try out Slony-I replication solution for PostgreSQL. It  
does not handle oid-blobs, so I must use bytea instead. This is okay  
as my blobs are not that big.

PostgreSQL has a blob problem.. If the blob in the database are  
bytea, you must use setBytes/getBytes. If it is oid blob, then you  
must use setBlob, getBlob. cayenne ByteArrayType handle this with the  
usingBlob parameter.

Some time ago, cayenne switched from bytea to oid blob as a default  
blob data type. That was a good choice, but makes replication  
solutions like Slony-I and Sequoia difficult to implement.

I want to be able to run the PostgresAdapter with bytea as blob type.  
Should I create my own local sublcass of cayenne PostgresAdapter with  
its own types.xml or is there a better way?

  - Tore.

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