difference between @Fetch(FetchMode.SELECT) and fetch = FetchType.LAZY

Question

I want to know why we need to use both @Fetch(FetchMode.SELECT) and fetch = FetchType.LAZY .fetchMode.select itself tells that all association should be loaded as lazy then why another term? `

@OneToMany(fetch = FetchType.LAZY, mappedBy = "stock")
@Cascade(CascadeType.ALL)
@Fetch(FetchMode.SELECT)
@BatchSize(size = 10)
public Set<StockDailyRecord> getStockDailyRecords() {
return this.stockDailyRecords;
}

`

Possible duplicate of difference between FetchMode and FetchType — CaringDev
– CaringDev, Commented Jan 23, 2016 at 14:39

Abdelhak · Accepted Answer · 2016-01-23 14:19:41Z

1

FetchType.LAZY: refers to when Hibernate will fetch the association and entities.
@Fetch(FetchMode.SELECT): refers to how Hibernate will fetch the association and entities.

answered Jan 23, 2016 at 14:19

Abdelhak

8,4154 gold badges25 silver badges37 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Ruslan Stelmachenko Over a year ago

If fetchType is LAZY then this implicitly assumes that FetchMode will be SELECT (or SUBSELECT if you set it explicitly). But I can't imagine how e.g. FetchType.LAZY + FetchMode.JOIN can work together. If it is joined already, it is not lazy by definition. The same is for FetchType.EAGER + FetchMode.SELECT/FetchMode.SUBSELECT. So, the real answer I think is that FetchMode is actually an "extension" to FetchType. FetchType.EAGER and FetchMode.JOIN is actually exactly the same. And FetchType.LAZY can be one of two types: FetchMode.SELECT and FetchMode.SUBSELECT.

Collectives™ on Stack Overflow

difference between @Fetch(FetchMode.SELECT) and fetch = FetchType.LAZY

1 Answer 1

1 Comment

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Linked

Related