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hibernate-orm
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HHH-15504 Add UUID support for SQL Server

This commit is contained in:
Christian Beikov 2022-09-13 20:15:28 +02:00
parent 69668c32b7
commit 60bd1c657b
3 changed files with 39 additions and 1 deletions
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6
documentation/src/test/java/org/hibernate/userguide/mapping/identifier/UuidGeneratedValueTest.java
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@ -17,6 +17,7 @@ import org.hibernate.orm.test.jpa.BaseEntityManagerFunctionalTestCase;
import org.junit.Test;
import static org.hibernate.testing.transaction.TransactionUtil.doInJPA;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
/**
@ -43,6 +44,11 @@ public class UuidGeneratedValueTest extends BaseEntityManagerFunctionalTestCase
});
assertNotNull(book.getId());
doInJPA(this::entityManagerFactory, entityManager -> {
Book foundBook = entityManager.find( Book.class, book.getId() );
assertEquals( book.getAuthor(), foundBook.getAuthor() );
});
}
//tag::identifiers-generators-uuid-mapping-example[]

25
hibernate-core/src/main/java/org/hibernate/dialect/SQLServerDialect.java
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@ -20,7 +20,6 @@ import org.hibernate.dialect.identity.SQLServerIdentityColumnSupport;
import org.hibernate.dialect.pagination.LimitHandler;
import org.hibernate.dialect.pagination.SQLServer2005LimitHandler;
import org.hibernate.dialect.pagination.SQLServer2012LimitHandler;
import org.hibernate.dialect.pagination.TopLimitHandler;
import org.hibernate.dialect.sequence.NoSequenceSupport;
import org.hibernate.dialect.sequence.SQLServer16SequenceSupport;
import org.hibernate.dialect.sequence.SQLServerSequenceSupport;
@ -53,8 +52,11 @@ import org.hibernate.type.BasicType;
import org.hibernate.type.BasicTypeRegistry;
import org.hibernate.type.StandardBasicTypes;
import org.hibernate.type.descriptor.java.PrimitiveByteArrayJavaType;
import org.hibernate.type.descriptor.jdbc.JdbcType;
import org.hibernate.type.descriptor.jdbc.SmallIntJdbcType;
import org.hibernate.type.descriptor.jdbc.UUIDJdbcType;
import org.hibernate.type.descriptor.jdbc.XmlJdbcType;
import org.hibernate.type.descriptor.jdbc.spi.JdbcTypeRegistry;
import org.hibernate.type.descriptor.sql.internal.DdlTypeImpl;
import org.hibernate.type.descriptor.sql.spi.DdlTypeRegistry;
@ -174,6 +176,26 @@ public class SQLServerDialect extends AbstractTransactSQLDialect {
ddlTypeRegistry.addDescriptor( new DdlTypeImpl( GEOMETRY, "geometry", this ) );
ddlTypeRegistry.addDescriptor( new DdlTypeImpl( GEOGRAPHY, "geography", this ) );
ddlTypeRegistry.addDescriptor( new DdlTypeImpl( SQLXML, "xml", this ) );
ddlTypeRegistry.addDescriptor( new DdlTypeImpl( UUID, "uniqueidentifier", this ) );
}
@Override
public JdbcType resolveSqlTypeDescriptor(
String columnTypeName,
int jdbcTypeCode,
int precision,
int scale,
JdbcTypeRegistry jdbcTypeRegistry) {
switch ( jdbcTypeCode ) {
case OTHER:
switch ( columnTypeName ) {
case "uniqueidentifier":
jdbcTypeCode = UUID;
break;
}
break;
}
return super.resolveSqlTypeDescriptor( columnTypeName, jdbcTypeCode, precision, scale, jdbcTypeRegistry );
}
@Override
@ -213,6 +235,7 @@ public class SQLServerDialect extends AbstractTransactSQLDialect {
SmallIntJdbcType.INSTANCE
);
typeContributions.contributeJdbcType( XmlJdbcType.INSTANCE );
typeContributions.contributeJdbcType( UUIDJdbcType.INSTANCE );
}
@Override

9
migration-guide.adoc
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@ -22,3 +22,12 @@ Due to this change, schema validation errors could occur on existing databases.
The migration to `uuid` requires a migration expression like `cast(old as uuid)`.
To retain backwards compatibility, configure the setting `hibernate.type.preferred_uuid_jdbc_type` to `BINARY`.
=== UUID mapping changes on SQL Server
On SQL Server, the type code `SqlType.UUID` now by default refers to the DDL type `uniqueidentifier`, whereas before it was using `binary(16)`.
Due to this change, schema validation errors could occur on existing databases.
The migration to `uuid` requires a migration expression like `cast(old as uuid)`.
To retain backwards compatibility, configure the setting `hibernate.type.preferred_uuid_jdbc_type` to `BINARY`.