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Add json-columns module: JSON columns in Hibernate 7.4.14 (@JdbcTypeCode(SqlTypes.JSON)), JSONB querying, GIN/expression indexes, dirty checking, Jackson 3 vs 2 on PostgreSQL 18.6 and MySQL 8.0.46

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Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_017ic4b6Kg9RWSTJzyz6KP9X
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Claude
2026-10-30 17:00:46 +00:00
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@@ -348,3 +348,4 @@ Modules with their own `pom.xml` that run plain Hibernate without the Spring Boo
| [`soft-delete`](soft-delete/) | `@SoftDelete` (`DELETED` / `ACTIVE` / `TIMESTAMP`) vs `@SQLDelete` + `@SQLRestriction`: generated SQL, restore, unique constraints, associations, native-query bypass and Spring Data JPA, on H2 and PostgreSQL 17 (Hibernate `7.4.14.Final`; unlike the others this module uses the Spring Boot 4.1.1 parent, for the Spring Data tests) |
| [`migration-5-to-7`](migration-5-to-7/) | Hibernate `5.6.15.Final` vs `7.4.14.Final`: jar diff, Hibernate 5 code compiled against both, schema defaults, `hbm2ddl` validation of a Hibernate 5 schema, and cheat-sheet snippets |
| [`multitenancy`](multitenancy/) | Hibernate 7 multi-tenancy on Spring Boot 4.1.2: `@TenantId` discriminator vs schema-per-tenant (shared pool with `search_path`, and pool per tenant), tenant from a JWT claim, the `search_path` leak and the no-tenant failure modes, on PostgreSQL 17 (Hibernate `7.4.14.Final`) |
| [`json-columns`](json-columns/) | JSON columns in Hibernate 7.4: `@JdbcTypeCode(SqlTypes.JSON)` for Map / List / record / POJO / `@Embeddable`, `json` vs `jsonb` DDL, HQL JSON functions, native JSONB operators, GIN and expression indexes with `EXPLAIN`, dirty checking, Jackson 3 vs Jackson 2 `FormatMapper`, MySQL 8.0, on PostgreSQL 18 (Hibernate `7.4.14.Final`, Spring Boot `4.1.2`) |