30 lines
1.4 KiB
Plaintext
30 lines
1.4 KiB
Plaintext
= 5.3 Migration Guide
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:toc:
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This guide discusses migration from Hibernate ORM version 5.2 to version 5.3. For migration from
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earlier versions, see any other pertinent migration guides as well.
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== Background
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5.3 represents a JPA 2.2 compatible version on top of 5.2
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== Changes to positional query parameter handling
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This really breaks down into 2 related changes:
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* Support for JDBC-style parameter declarations in HQL/JPQL queries has been removed. This feature
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has been deprecated since 4.1 and removing it made implementing the second change, so we decided
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to remove that support. JDBC-style parameter declaration is still supported in native-queries.
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* Since JPA positional parameters really behave more like named parameters (they can be repeated,
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declared in any order, etc.) Hibernate used to treat them as named parameters - it relied on
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Hibernate's JPA wrapper to interpret the JPA setParameter calls and properly handle delegating to
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the named variant. This is actually a regression in 5.2 as it causes
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`javax.persistence.Parameter#getPosition` to report `null`.
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For JDBC-style parameter declarations in native queries, we have also moved to using one-based
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instead of zero-bade parameter binding to be consistent with JPA. That can temporarily be
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reverted by setting the `hibernate.query.sql.jdbc_style_params_base` setting to `true` which
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reverts to expecting zero-based binding.
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