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hibernate-demo/docs/output/insert-sequence.txt
Ankur Mhatre 7b06d653e4 Add hibernate-demo: get() vs load(), merge() vs refresh(), inserting objects (Hibernate 7.4.1.Final + Spring Boot 4.1.0) 
Adds a JUnit test suite (GetVsGetReferenceTest, MergeRefreshTest, OptimisticLockTest,
IdentityBatchTest, SequenceBatchTest, AllocationSizeSweepTest, BatchSizeSweepTest) so every
surprising behavior described in the three companion posts has a reproducible test, alongside
the original CommandLineRunner scenarios. Rewrites all three doc chapters and the README around
the new experiments: the get()/getReference() same-session matrix, the merge()/refresh()
experiments (including exactly when OptimisticLockException surfaces and a corrected LAZY-plus-
cascade merge() result), and two new sweeps (allocationSize, batch_size) for batch inserts.
2026-08-26 18:05:00 +00:00

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Hibernate: create global temporary table HTE_book(rn_ integer not null, id bigint, version bigint, author varchar(255), title varchar(255), primary key (rn_)) transactional
Hibernate: create global temporary table HTE_widget_sequence(rn_ integer not null, id bigint, name varchar(255), primary key (rn_)) transactional
Hibernate: create table book (id bigint not null, author varchar(255), title varchar(255), version bigint not null, primary key (id))
Hibernate: create table widget_identity (id bigint generated by default as identity, name varchar(255), primary key (id))
Hibernate: create table widget_sequence (id bigint not null, name varchar(255), primary key (id))
Hibernate: create sequence book_seq start with 1 increment by 50
Hibernate: create sequence widget_seq start with 1 increment by 25
--- inserting 30 WidgetSequence rows (GenerationType.SEQUENCE, allocationSize=25) ---
Hibernate: select next value for widget_seq
Hibernate: select next value for widget_seq
Hibernate: select next value for widget_seq
Hibernate: /* insert for com.ankurm.hibernatedemo.model.WidgetSequence */insert into widget_sequence (name,id) values (?,?)
binding parameter (1:VARCHAR) <- [sequence-1]
binding parameter (2:BIGINT) <- [1]
Hibernate: /* insert for com.ankurm.hibernatedemo.model.WidgetSequence */insert into widget_sequence (name,id) values (?,?)
binding parameter (1:VARCHAR) <- [sequence-2]
binding parameter (2:BIGINT) <- [2]
Hibernate: /* insert for com.ankurm.hibernatedemo.model.WidgetSequence */insert into widget_sequence (name,id) values (?,?)
binding parameter (1:VARCHAR) <- [sequence-3]
binding parameter (2:BIGINT) <- [3]
Hibernate: /* insert for com.ankurm.hibernatedemo.model.WidgetSequence */insert into widget_sequence (name,id) values (?,?)
binding parameter (1:VARCHAR) <- [sequence-4]
binding parameter (2:BIGINT) <- [4]
Hibernate: /* insert for com.ankurm.hibernatedemo.model.WidgetSequence */insert into widget_sequence (name,id) values (?,?)
binding parameter (1:VARCHAR) <- [sequence-5]
binding parameter (2:BIGINT) <- [5]
Hibernate: /* insert for com.ankurm.hibernatedemo.model.WidgetSequence */insert into widget_sequence (name,id) values (?,?)
binding parameter (1:VARCHAR) <- [sequence-6]
binding parameter (2:BIGINT) <- [6]
Hibernate: /* insert for com.ankurm.hibernatedemo.model.WidgetSequence */insert into widget_sequence (name,id) values (?,?)
binding parameter (1:VARCHAR) <- [sequence-7]
binding parameter (2:BIGINT) <- [7]
Hibernate: /* insert for com.ankurm.hibernatedemo.model.WidgetSequence */insert into widget_sequence (name,id) values (?,?)
binding parameter (1:VARCHAR) <- [sequence-8]
binding parameter (2:BIGINT) <- [8]
Hibernate: /* insert for com.ankurm.hibernatedemo.model.WidgetSequence */insert into widget_sequence (name,id) values (?,?)
binding parameter (1:VARCHAR) <- [sequence-9]
binding parameter (2:BIGINT) <- [9]
Hibernate: /* insert for com.ankurm.hibernatedemo.model.WidgetSequence */insert into widget_sequence (name,id) values (?,?)
binding parameter (1:VARCHAR) <- [sequence-10]
binding parameter (2:BIGINT) <- [10]
Hibernate: /* insert for com.ankurm.hibernatedemo.model.WidgetSequence */insert into widget_sequence (name,id) values (?,?)
binding parameter (1:VARCHAR) <- [sequence-11]
binding parameter (2:BIGINT) <- [11]
Hibernate: /* insert for com.ankurm.hibernatedemo.model.WidgetSequence */insert into widget_sequence (name,id) values (?,?)
binding parameter (1:VARCHAR) <- [sequence-12]
binding parameter (2:BIGINT) <- [12]
Hibernate: /* insert for com.ankurm.hibernatedemo.model.WidgetSequence */insert into widget_sequence (name,id) values (?,?)
binding parameter (1:VARCHAR) <- [sequence-13]
binding parameter (2:BIGINT) <- [13]
Hibernate: /* insert for com.ankurm.hibernatedemo.model.WidgetSequence */insert into widget_sequence (name,id) values (?,?)
binding parameter (1:VARCHAR) <- [sequence-14]
binding parameter (2:BIGINT) <- [14]
Hibernate: /* insert for com.ankurm.hibernatedemo.model.WidgetSequence */insert into widget_sequence (name,id) values (?,?)
binding parameter (1:VARCHAR) <- [sequence-15]
binding parameter (2:BIGINT) <- [15]
Hibernate: /* insert for com.ankurm.hibernatedemo.model.WidgetSequence */insert into widget_sequence (name,id) values (?,?)
binding parameter (1:VARCHAR) <- [sequence-16]
binding parameter (2:BIGINT) <- [16]
Hibernate: /* insert for com.ankurm.hibernatedemo.model.WidgetSequence */insert into widget_sequence (name,id) values (?,?)
binding parameter (1:VARCHAR) <- [sequence-17]
binding parameter (2:BIGINT) <- [17]
Hibernate: /* insert for com.ankurm.hibernatedemo.model.WidgetSequence */insert into widget_sequence (name,id) values (?,?)
binding parameter (1:VARCHAR) <- [sequence-18]
binding parameter (2:BIGINT) <- [18]
Hibernate: /* insert for com.ankurm.hibernatedemo.model.WidgetSequence */insert into widget_sequence (name,id) values (?,?)
binding parameter (1:VARCHAR) <- [sequence-19]
binding parameter (2:BIGINT) <- [19]
Hibernate: /* insert for com.ankurm.hibernatedemo.model.WidgetSequence */insert into widget_sequence (name,id) values (?,?)
binding parameter (1:VARCHAR) <- [sequence-20]
binding parameter (2:BIGINT) <- [20]
Hibernate: /* insert for com.ankurm.hibernatedemo.model.WidgetSequence */insert into widget_sequence (name,id) values (?,?)
binding parameter (1:VARCHAR) <- [sequence-21]
binding parameter (2:BIGINT) <- [21]
Hibernate: /* insert for com.ankurm.hibernatedemo.model.WidgetSequence */insert into widget_sequence (name,id) values (?,?)
binding parameter (1:VARCHAR) <- [sequence-22]
binding parameter (2:BIGINT) <- [22]
Hibernate: /* insert for com.ankurm.hibernatedemo.model.WidgetSequence */insert into widget_sequence (name,id) values (?,?)
binding parameter (1:VARCHAR) <- [sequence-23]
binding parameter (2:BIGINT) <- [23]
Hibernate: /* insert for com.ankurm.hibernatedemo.model.WidgetSequence */insert into widget_sequence (name,id) values (?,?)
binding parameter (1:VARCHAR) <- [sequence-24]
binding parameter (2:BIGINT) <- [24]
Hibernate: /* insert for com.ankurm.hibernatedemo.model.WidgetSequence */insert into widget_sequence (name,id) values (?,?)
binding parameter (1:VARCHAR) <- [sequence-25]
binding parameter (2:BIGINT) <- [25]
Hibernate: /* insert for com.ankurm.hibernatedemo.model.WidgetSequence */insert into widget_sequence (name,id) values (?,?)
binding parameter (1:VARCHAR) <- [sequence-26]
binding parameter (2:BIGINT) <- [26]
Hibernate: /* insert for com.ankurm.hibernatedemo.model.WidgetSequence */insert into widget_sequence (name,id) values (?,?)
binding parameter (1:VARCHAR) <- [sequence-27]
binding parameter (2:BIGINT) <- [27]
Hibernate: /* insert for com.ankurm.hibernatedemo.model.WidgetSequence */insert into widget_sequence (name,id) values (?,?)
binding parameter (1:VARCHAR) <- [sequence-28]
binding parameter (2:BIGINT) <- [28]
Hibernate: /* insert for com.ankurm.hibernatedemo.model.WidgetSequence */insert into widget_sequence (name,id) values (?,?)
binding parameter (1:VARCHAR) <- [sequence-29]
binding parameter (2:BIGINT) <- [29]
Hibernate: /* insert for com.ankurm.hibernatedemo.model.WidgetSequence */insert into widget_sequence (name,id) values (?,?)
binding parameter (1:VARCHAR) <- [sequence-30]
binding parameter (2:BIGINT) <- [30]
entityInsertCount = 30
prepareStatementCount = 4
(with SEQUENCE, the id is known before the row is written, so Hibernate can defer and batch the inserts -- expect prepareStatementCount well below entityInsertCount)
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