For my model I went with a byte[] property since Blob is an interface. There is some discussion right now on pg-jdbc about making this driver the new one and deprecating the old one, interessting to see what happens. In that case I ended up unwrapping the Eclipselink session from the injected EntityManager, getting a connection and creating a prepared statement whose ResultSet I iterated, grabbing the blob stream like so: Are there any examples around using PG with Blobs, using streams not byte[]? Nov 21 ’12 at 8:

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Currently, by default, when reading EclipseLink will read all the data in the BLOB by default – the reason is because after we are done with the connection, we will not have that option anymore. We implement a way of making fields mapped to LOBs LAZY, to avoid loading them when they are not needed, but that does not avoid loading them all at once when they are loaded.

You could add to it as needed. Nov 21 ’12 at 8: I don’t understand the question, what do you mean? In that case I ended up unwrapping the Eclipselink session from the injected EntityManager, getting a connection and creating a prepared statement whose ResultSet I iterated, grabbing the blob stream like so: If not, what code would you write to get the stream?

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target-database | EclipseLink x Java Persistence API (JPA) Extensions Reference

I probably could change schema via native SQL directly but is there a way to bind schema to postgressl unit? Sign up or log in Sign up using Google. Are there any examples around using PG with Blobs, using streams not byte[]? I’m testing throughout the summer and see how it goes.

Blob and PostgreSQL

It subclasses BigInteger to get around some of the restrictions we have about what can be mapped as a Basic. It seems to supports more features then the official driver but is still experimental. In reply poetgresql this post by Andreas Joseph Krogh.

Does the connection you initially read it with need to stay open in order to get the stream? Search everywhere only in this topic. Stack Overflow works best with JavaScript enabled. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

I chose to have one database and multiples schemas instead of having multiples databases and one schema per database. If so, that will be a challenge given the constraints of the JPA world.

I need to store quite large binaries in my DB so storing them as byte-arrays PG’s bytea doesn’t work for me, I postgresqp to work with streams. A Customizer like ecli;selink should workaround the Read issue: Sign up using Email and Password. There is some discussion right now on pg-jdbc about making this driver the new one and deprecating the old one, interessting to see what happens.

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What I need is large postggesql not fit in RAM to be part of a transaction when writing data. JPA – EclipseLink – How to change default schema You eclipslink override the schema for the entire persistence unit using an orm.

BlobProxy which does goes around this. Sign up using Facebook. Free forum by Nabble. I am still looking in to the best way to get around that issue.

There is quite alot of functionality that can be overridden through subclassing our various database platforms. I need be able to call myBinaryProperty. This same postvresql was asked and answered here: So, in my persistence.

Do you need a connection posygresql the duration of the time that you use it? Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.