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Asked: 2026-05-25T21:24:12+00:00

I’ve been developing a web site with the Play framework (scala) using H2 as

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I’ve been developing a web site with the Play framework (scala) using H2 as a backend. Testing is nicely integrated, especially with the ability to run tests against an in-memory H2 db.

Now I’d like to move my datastore over to Postgres for various convenience reasons. This leaves me with a problem: How to continue to test and retain the simplicity of a fresh db for each test run? I see on the net that some people manage to run live against postgres and test against H2. However the two are not entirely compatible at the SQL level (even with H2 in Postgres compatibility mode). For instance SERIAL, BIGSERIAL and BYTEA are not supported on H2.

Can I do this by using a constrained compatible intersection of both dialects, or is there another technique I’m missing?

Thanks for any help.

Alex

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1 Answer

  1. Editorial Team

    As evolution files use SQL directly, unless you limited yourself to a common cross-db-compatible subset of SQL you may have issues.

    There is no real solution on that, but you can still use a fresh db for testing. Just set the following:

    %test.jpa.ddl=create-drop
%test.db.driver=org.postgresql.Driver
%test.db=<jdbc url>
//etc

    This should create a new postgres connection for test, create the db from scratch, run the evolutions, do the tests and remove all data once done.

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