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Mapping single entity to multiple tables. I show you the 2 required steps in this post.
Mapping single entity to multiple tables. Apr 3, 2025 · In this short tutorial, we’ve seen how we can map multiple tables to the same entity using the @SecondaryTable JPA annotation. Legacy Tables: TABLE1 (ID,VALUE) TABLE2 (ID,DATE) TABLE3 (ID,DESCRIPTION) In this chapter we mapped multiple tables mapped thru a one-to-one primary key join into a single class. Furthermore, we’ll also model this using the following table definitions: Now let’s see how can we map these tables to entities using standard JPA annotations. Aug 17, 2013 · I got a legacy database domain I can't change but it was possible conceive a domain entity to address my problema. We also saw the advantages of combining @SecondaryTable with @Embedded and @Embeddable to get a relationship similar to one-to-one. Learn how to map a single entity to multiple tables in JPA with practical examples and best practices. This is called table splitting or table sharing. . You will find this very similar to when we map a Java class inheritance hierachy to multiple tables using the JOIN strategy. Nov 18, 2019 · Since there are many possible allergens, we’re going to group this dataset together. For some table and domain models, you need to map an entity to multiple tables. To use table splitting the entity types need to be mapped to the same table, have the primary keys mapped to the same columns and at least one relationship configured between the primary key of one entity type and another in the same table. I show you the 2 required steps in this post. Mar 29, 2023 · EF Core allows to map two or more entities to a single row. JPA and Hibernate offer an easy way to define such a mapping. aauajcoucyyhzejigyktywzgrarwuvepezeyrlbukulzsmggmmqjomyzb