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fix restore auto increment ID overflow #458
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3pointer
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kennytm
reviewed
Aug 14, 2020
pkg/restore/db.go
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| // auto inc id overflow | ||
| autoIncID := table.Info.AutoIncID | ||
| if table.Info.AutoIncID < 0 { | ||
| autoIncID = math.MaxInt64 |
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what about bigint unsigned columns?
create table a (id bigint unsigned primary key auto_increment);
insert into a values (12345678901234567890);There was a problem hiding this comment.
I was wondering that the allocator can work well 🤔️，it set the allocator with unsigned=false https://github.com/pingcap/br/blob/master/pkg/backup/client.go#L261
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How about add globalAutoID -= 1 after https://github.com/pingcap/br/blob/master/pkg/backup/client.go#L277?
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I'm not sure what's the purpose of subtracting 1 😅
kennytm
reviewed
Aug 17, 2020
glorv
reviewed
Aug 21, 2020
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Any update? |
overvenus
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component/restore
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3pointer
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…into fix_restore_overflow
kennytm
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Apr 15, 2021
Comment on lines
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| autoIncID = uint64(table.Info.AutoIncID) | ||
| } else { | ||
| setValSQL = fmt.Sprintf(setValFormat, table.Info.Sequence.MaxValue) | ||
| autoIncID = uint64(table.Info.AutoIncID) | ||
| } |
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the two branches are the same? so this is simply
}
autoIncID = uint64(table.Info.AutoIncID)?
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What problem does this PR solve?
when auto_increment id reached max.Int64, it can backs up success. but failed when restore. we should handle this situation.
What is changed and how it works?
if autoIncID overflowed. change is to max.Int64, to keep consistency with backup cluster.
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