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[jpa-dev] Eclipselink and Query.getResultStream()
  • From: Oliver Drotbohm <odrotbohm@xxxxxxxxxx>
  • Date: Tue, 13 Sep 2022 09:03:52 +0000
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  • Thread-topic: Eclipselink and Query.getResultStream()
Hi,

it was just brought to my attention [0] that Eclipselink in its current production release doesn't actually override the default implementation of Query.getResultStream(). This seems to come as a surprise to users, especially as Eclipselink is the JPA reference implementation.

it is even more of a downgrade to users of downstream integration libraries like Spring Data, as previous versions of that could implement Stream support on top of provider-native exposed cursors. With Query.getResultStream() available in the API we dropped that custom support in favor of a feature of the spec, which now unfortunately leaves users with a degraded memory profile of their application. I just checked the current RC 2 of Eclipselink 4.0 but it looks like the situation hasn't changed either.

So are there any plans to actually support that feature?

Cheers,
Ollie

[0] https://github.com/spring-projects/spring-data-jpa/issues/2627

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