https://github.com/cepr0/pg-uuid-projection-exception

Native query method with UUID and projection on PostgreSQL throws an exception
https://github.com/cepr0/pg-uuid-projection-exception

native-query postgresql projection spring-boot spring-data-jpa

Last synced: 3 days ago
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Native query method with UUID and projection on PostgreSQL throws an exception

• Host: GitHub
• URL: https://github.com/cepr0/pg-uuid-projection-exception
• Owner: Cepr0
• Created: 2018-04-25T20:56:12.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2018-04-26T10:12:46.000Z (over 6 years ago)
• Last Synced: 2024-11-17T02:42:24.316Z (2 months ago)
• Topics: native-query, postgresql, projection, spring-boot, spring-data-jpa
• Language: Java
• Homepage:
• Size: 11.7 KB
• Stars: 1
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: readme.md

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README

        
Native query method with **projection** containing **UUID** properties throws an exception:

> org.hibernate.MappingException: No Dialect mapping for JDBC type: 1111 

(tested on **PostgreSQL**)

Example:

```java

@Entity

public class Model {

	@Id

	@GeneratedValue(strategy = GenerationType.AUTO)

	private UUID id;

	private UUID uuid;

}

@Query(value = "select m.id as id, m.uuid as uuid from model m where m.id = ?1", nativeQuery = true)

Optional getModelProjection(UUID id);

```

Native query with entity class works as expected.

How to reproduce:

1. Create database `uuid-demo` in PostgreSQL server (with username and password `postgres` - see 'application.properties')

2. Run test `io.github.cepr0.demo.ModelRepoTest`

To workaround this I created a custom PostgreSQL dialect class:

```java

public class CustomPostgreSQL95Dialect extends PostgreSQL95Dialect {

	

	public PatchedPostgreSQL95Dialect() {

		super();

		registerHibernateType(Types.OTHER, "org.hibernate.type.PostgresUUIDType");

	}

}

``` 

And set it in the 'application.properties'

`spring.jpa.properties.hibernate.dialect=io.github.cepr0.demo.CustomPostgreSQL95Dialect`

P.S. During testing, it turned out that [class-based projections](https://docs.spring.io/spring-data/jpa/docs/current/reference/html/#projections.dtos) 

does not work with native queries - they throw an exception:

```

org.springframework.core.convert.ConverterNotFoundException: 

No converter found capable of converting from type [org.springframework.data.jpa.repository.query.AbstractJpaQuery$TupleConverter$TupleBackedMap] 

to type [io.github.cepr0.demo.ModelDto]

```