asmhatreandClaude Sonnet 5.5
c9faf35e61
Co-Authored-By: Claude Sonnet 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_017ic4b7rnC7jppGGdHGESvy
68 lines
3.4 KiB
Plaintext
68 lines
3.4 KiB
Plaintext
@SoftDelete vs @SQLDelete+@SQLRestriction: bulk deletes, double deletes, converters
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######## H2 ########
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database: H2Dialect / H2 2.4.240 (2025-09-22)
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== 1. HQL bulk delete: delete from ArticleDeleted / delete from ArticleManual
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-- delete from ArticleDeleted
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sql> update article_deleted ad1_0 set deleted=true where ad1_0.deleted=false
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article_deleted rows: [1 | a | true, 2 | b | true]
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-- delete from ArticleManual
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sql> delete from article_manual am1_0 where (am1_0.deleted = false)
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article_manual rows : []
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== 2. Two sessions delete the same row (second one is stale)
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-- @SQLDelete entity, s1.flush()
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sql> update article_manual set deleted = true where id = ?
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flush succeeded silently (the hand-written UPDATE has no 'and deleted = false' guard)
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(the @SoftDelete entity fails the same scenario with StaleStateException: see 02-ddl-and-sql.txt)
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== 3. converter attribute: char(1) 'Y'/'N' column named is_gone
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create table article_yes_no (is_gone char(1) not null check ((is_gone in ('N','Y'))), id bigint generated by default as identity, title varchar(255), primary key (id));
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comment on column article_yes_no.is_gone is 'Y = deleted';
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alive : [1 | N]
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-- remove
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sql> select ayn1_0.id,ayn1_0.title from article_yes_no ayn1_0 where ayn1_0.is_gone='N' and ayn1_0.id=?
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sql> update article_yes_no set is_gone='Y' where id=? and is_gone='N'
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deleted : [1 | Y]
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== 4. @SoftDelete on a @MappedSuperclass
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create table note (deleted_at timestamp(6) with time zone, id bigint generated by default as identity, text varchar(255), primary key (id));
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-- remove(note)
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sql> select n1_0.id,n1_0.text from note n1_0 where n1_0.deleted_at is null and n1_0.id=?
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sql> update note set deleted_at=localtimestamp where id=? and deleted_at is null
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raw: [1 | true]
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######## POSTGRES ########
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database: PostgreSQLDialect / PostgreSQL 17.11
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== 1. HQL bulk delete: delete from ArticleDeleted / delete from ArticleManual
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-- delete from ArticleDeleted
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sql> update article_deleted ad1_0 set deleted=true where ad1_0.deleted=false
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article_deleted rows: [1 | a | true, 2 | b | true]
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-- delete from ArticleManual
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sql> delete from article_manual am1_0 where (am1_0.deleted = false)
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article_manual rows : []
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== 2. Two sessions delete the same row (second one is stale)
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-- @SQLDelete entity, s1.flush()
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sql> update article_manual set deleted = true where id = ?
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flush succeeded silently (the hand-written UPDATE has no 'and deleted = false' guard)
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(the @SoftDelete entity fails the same scenario with StaleStateException: see 02-ddl-and-sql.txt)
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== 3. converter attribute: char(1) 'Y'/'N' column named is_gone
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create table article_yes_no (is_gone char(1) not null check ((is_gone in ('N','Y'))), id bigint generated by default as identity, title varchar(255), primary key (id));
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comment on column article_yes_no.is_gone is 'Y = deleted';
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alive : [1 | N]
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-- remove
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sql> select ayn1_0.id,ayn1_0.title from article_yes_no ayn1_0 where ayn1_0.is_gone='N' and ayn1_0.id=?
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sql> update article_yes_no set is_gone='Y' where id=? and is_gone='N'
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deleted : [1 | Y]
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== 4. @SoftDelete on a @MappedSuperclass
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create table note (deleted_at timestamp(6) with time zone, id bigint generated by default as identity, text varchar(255), primary key (id));
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-- remove(note)
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sql> select n1_0.id,n1_0.text from note n1_0 where n1_0.deleted_at is null and n1_0.id=?
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sql> update note set deleted_at=localtimestamp where id=? and deleted_at is null
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raw: [1 | true]
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