HHH-16762 SchemaMigrator generates ORA-22859 errors on columns annotated with @Lob

hibernate-core/src/test/java/org/hibernate/orm/test/schemaupdate/LobSchemaUpdateTest.java

@@ -0,0 +1,119 @@
+package org.hibernate.orm.test.schemaupdate;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.util.EnumSet;
+
+import org.hibernate.boot.MetadataSources;
+import org.hibernate.boot.registry.StandardServiceRegistry;
+import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
+import org.hibernate.boot.spi.MetadataImplementor;
+import org.hibernate.tool.hbm2ddl.SchemaExport;
+import org.hibernate.tool.hbm2ddl.SchemaUpdate;
+import org.hibernate.tool.schema.TargetType;
+
+import org.hibernate.testing.orm.junit.JiraKey;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.Id;
+import jakarta.persistence.Lob;
+
+import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
+
+@JiraKey("HHH-16762")
+public class LobSchemaUpdateTest {
+	private File output;
+	private StandardServiceRegistry ssr;
+	private MetadataImplementor metadata;
+
+	@BeforeEach
+	public void setUp() throws IOException {
+		output = File.createTempFile( "update_script", ".sql" );
+		output.deleteOnExit();
+		ssr = new StandardServiceRegistryBuilder().build();
+	}
+
+	@AfterEach
+	public void tearsDown() {
+		dropDatabase(TestEntity.class  );
+		output.delete();
+		StandardServiceRegistryBuilder.destroy( ssr );
+	}
+
+	@Test
+	public void testUpdateIsNotExecuted() throws Exception {
+		createSchema( TestEntity.class );
+		updateSchema( TestEntity.class );
+		String fileContent = new String( Files.readAllBytes( output.toPath() ) ).toLowerCase()
+				.replace( System.lineSeparator(), "" );
+		assertThat( fileContent ).isEmpty();
+	}
+
+	private void createSchema(Class... annotatedClasses) {
+		final MetadataSources metadataSources = new MetadataSources( ssr );
+
+		for ( Class c : annotatedClasses ) {
+			metadataSources.addAnnotatedClass( c );
+		}
+		metadata = (MetadataImplementor) metadataSources.buildMetadata();
+		metadata.orderColumns( false );
+		metadata.validate();
+		new SchemaExport()
+				.setHaltOnError( false )
+				.setFormat( false )
+				.create( EnumSet.of( TargetType.DATABASE ), metadata );
+	}
+
+	private void updateSchema(Class... annotatedClasses) {
+		final MetadataSources metadataSources = new MetadataSources( ssr );
+
+		for ( Class c : annotatedClasses ) {
+			metadataSources.addAnnotatedClass( c );
+		}
+		metadata = (MetadataImplementor) metadataSources.buildMetadata();
+		metadata.orderColumns( false );
+		metadata.validate();
+		new SchemaUpdate()
+				.setHaltOnError( true )
+				.setOutputFile( output.getAbsolutePath() )
+				.setFormat( false )
+				.execute( EnumSet.of( TargetType.SCRIPT, TargetType.DATABASE ), metadata );
+	}
+
+	private void dropDatabase(Class... annotatedClasses){
+		final MetadataSources metadataSources = new MetadataSources( ssr );
+
+		for ( Class c : annotatedClasses ) {
+			metadataSources.addAnnotatedClass( c );
+		}
+		metadata = (MetadataImplementor) metadataSources.buildMetadata();
+		metadata.orderColumns( false );
+		metadata.validate();
+		new SchemaExport()
+				.setHaltOnError( false )
+				.setFormat( false )
+				.drop( EnumSet.of( TargetType.DATABASE ), metadata );
+	}
+
+	@Entity(name = "TestEntity")
+	public class TestEntity {
+
+		@Id
+		@GeneratedValue
+		protected int id;
+
+		@Lob
+		protected String clobField;
+
+		@Lob
+		protected byte[] blobField;
+
+		public TestEntity() {}
+	}
+
+}