New posts for Spring and Hibernate

2026-11-06 01:05:17 +05:30
parent b83cc9988e
commit 0245c00033
57 changed files with 2113 additions and 0 deletions
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+Spring Data JPA save() with application-assigned vs generated ids. Spring Boot parent 4.1.1, Hibernate 7.4.14.Final, H2
+
+== AssignedBook: UUID.randomUUID() assigned in the constructor, no @Version
+   sql> select ab1_0.id,ab1_0.title from assigned_book ab1_0 where ab1_0.id=?
+   sql> insert into assigned_book (title,id) values (?,?)
+
+== VersionedBook: same, plus a boxed @Version column
+   sql> insert into versioned_book (title,version,id) values (?,?,?)
+
+== PersistableBook: same, entity implements Persistable.isNew()
+   sql> insert into persistable_book (title,id) values (?,?)
+
+== GeneratedBook: @UuidGenerator(style = VERSION_7), id is null until persist
+   sql> insert into generated_book (title,id) values (?,?)
+
+== saveAll of 100 new AssignedBook rows: selects issued
+select statements : 100, insert statements : 100
+
+== saveAll of 100 new GeneratedBook rows: selects issued
+select statements : 0, insert statements : 100