[OPENJPA-2940] Migration considerations for OpenJPA 4.2.0 (Jakarta Persistence 3.2) - #164
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…a Persistence 3.2) Documents the incompatibilities, default changes, platform/dependency requirements, database-specific changes, SPI changes and notable new features introduced by the Jakarta Persistence 3.2 implementation (#144), derived from the merged code changes and the PR review discussion.
Reverses the order of the top-level release sections in migration_considerations.xml so that the most recent release (OpenJPA 4.2.0) is listed first. Content is unchanged.
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re-approving as requested :))
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Adds a
jpa_4.2section tomigration_considerations.xmlcovering the changes introduced by #144 (Jakarta Persistence 3.2), derived from the merged diff and the review discussion on that PR: platform and dependency requirements, JPQL/query semantics (new reserved identifiers, materializedgetResultList(), non-cascading bulkDELETE,FlushModeType.AUTO, rollback-only marking, argument validation), mapping and schema changes (default map key column, attribute overrides, converters, access type, generated DDL, schema generation), database-specific changes (PostgreSQL, MySQL/MariaDB, SQL Server, Oracle, HSQLDB), SPI changes and a compact list of notable new features.Each item states the previous and the new behaviour and, where one exists, the property that restores the old behaviour. The PostgreSQL
StoreCharsAsNumbersparagraph describes the behaviour after #163; the corresponding hunk in #163 should then be dropped, since it was placed under the OpenJPA 3.2.0 section.Draft: the section is long and some per-database / SPI subsections may deserve trimming — reviews welcome on what to keep.