Fix DELETE query in derived delete operations

spring-data-jdbc/src/main/java/org/springframework/data/jdbc/repository/query/JdbcDeleteQueryCreator.java

@@ -150,11 +150,16 @@ private void deleteRelations(RelationalPersistentEntity<?> entity, Select parent
 
 			Condition inCondition = Conditions.in(expression, parentSelect);
 
-			List<Column> parentIdColumns = aggregatePath.getIdDefiningParentPath().getTableInfo().idColumnInfos()
-					.toColumnList(table);
+			List<Column> idColumns = aggregatePath.getTableInfo().idColumnInfos()
+                        .toColumnList(table);
+
+			if (idColumns.isEmpty()) {
+				idColumns = aggregatePath.getIdDefiningParentPath().getTableInfo().idColumnInfos()
+                        .toColumnList(table);
+			}
 
 			Select select = StatementBuilder.select( //
-					parentIdColumns //
+					idColumns //
 			).from(table) //
 					.where(inCondition) //
 					.build();

spring-data-jdbc/src/test/java/org/springframework/data/jdbc/repository/JdbcRepositoryWithCollectionsChainHsqlIntegrationTests.java

@@ -12,6 +12,7 @@
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
 import org.springframework.data.annotation.Id;
+import org.springframework.data.relational.core.mapping.Column;
 import org.springframework.data.jdbc.repository.support.JdbcRepositoryFactory;
 import org.springframework.data.jdbc.testing.DatabaseType;
 import org.springframework.data.jdbc.testing.EnabledOnDatabase;
@@ -32,6 +33,7 @@ class JdbcRepositoryWithCollectionsChainHsqlIntegrationTests {
 
 	@Autowired NamedParameterJdbcTemplate template;
 	@Autowired DummyEntityRepository repository;
+	@Autowired CustomIdDummyEntityRepository customIdRepository;
 
 	private static DummyEntity createDummyEntity() {
 
@@ -40,6 +42,13 @@ private static DummyEntity createDummyEntity() {
 		return entity;
 	}
 
+	private static CustomIdDummyEntity createCustomIdDummyEntity() {
+
+		CustomIdDummyEntity entity = new CustomIdDummyEntity();
+		entity.name = "Custom ID Entity Name";
+		return entity;
+	}
+
 	@Test // DATAJDBC-551
 	void deleteByName() {
 
@@ -60,6 +69,26 @@ void deleteByName() {
 		assertThat(count).isEqualTo(0);
 	}
 
+	@Test // DATAJDBC-2123
+	void deleteByNameWithCustomIdColumn() {
+
+		CustomIdChildElement element1 = createCustomIdChildElement("one");
+		CustomIdChildElement element2 = createCustomIdChildElement("two");
+
+		CustomIdDummyEntity entity = createCustomIdDummyEntity();
+		entity.content.add(element1);
+		entity.content.add(element2);
+
+		entity = customIdRepository.save(entity);
+
+		assertThat(customIdRepository.deleteByName("Custom ID Entity Name")).isEqualTo(1);
+
+		assertThat(customIdRepository.findById(entity.id)).isEmpty();
+
+		Long count = template.queryForObject("select count(1) from custom_id_grand_child_element", new HashMap<>(), Long.class);
+		assertThat(count).isEqualTo(0);
+	}
+
 	private ChildElement createChildElement(String name) {
 
 		ChildElement element = new ChildElement();
@@ -76,10 +105,30 @@ private GrandChildElement createGrandChildElement(String content) {
 		return element;
 	}
 
+	private CustomIdChildElement createCustomIdChildElement(String name) {
+
+		CustomIdChildElement element = new CustomIdChildElement();
+		element.name = name;
+		element.content.add(createCustomIdGrandChildElement(name + "1"));
+		element.content.add(createCustomIdGrandChildElement(name + "2"));
+		return element;
+	}
+
+	private CustomIdGrandChildElement createCustomIdGrandChildElement(String content) {
+
+		CustomIdGrandChildElement element = new CustomIdGrandChildElement();
+		element.content = content;
+		return element;
+	}
+
 	interface DummyEntityRepository extends CrudRepository<DummyEntity, Long> {
 		long deleteByName(String name);
 	}
 
+	interface CustomIdDummyEntityRepository extends CrudRepository<CustomIdDummyEntity, Long> {
+		long deleteByName(String name);
+	}
+
 	@Configuration
 	@Import(TestConfiguration.class)
 	static class Config {
@@ -95,6 +144,11 @@ Class<?> testClass() {
 		DummyEntityRepository dummyEntityRepository() {
 			return factory.getRepository(DummyEntityRepository.class);
 		}
+
+		@Bean
+		CustomIdDummyEntityRepository customIdDummyEntityRepository() {
+			return factory.getRepository(CustomIdDummyEntityRepository.class);
+		}
 	}
 
 	static class DummyEntity {
@@ -118,4 +172,24 @@ static class GrandChildElement {
 		@Id private Long id;
 	}
 
+    static class CustomIdDummyEntity {
+
+        String name;
+        Set<CustomIdChildElement> content = new HashSet<>();
+        @Id private Long id;
+    }
+
+    static class CustomIdChildElement {
+
+        String name;
+        Set<CustomIdGrandChildElement> content = new HashSet<>();
+        @Id @Column("CHILD_ID") private Long id;
+    }
+
+    static class CustomIdGrandChildElement {
+
+        String content;
+        @Id private Long id;
+    }
+
 }

spring-data-jdbc/src/test/resources/org.springframework.data.jdbc.repository/JdbcRepositoryWithCollectionsChainHsqlIntegrationTests-hsql.sql

@@ -15,3 +15,20 @@ CREATE TABLE GRAND_CHILD_ELEMENT
     CONTENT       VARCHAR(100),
     CHILD_ELEMENT BIGINT
 );
+CREATE TABLE CUSTOM_ID_DUMMY_ENTITY
+(
+    ID   BIGINT GENERATED BY DEFAULT AS IDENTITY ( START WITH 1 ) PRIMARY KEY,
+    NAME VARCHAR(100)
+);
+CREATE TABLE CUSTOM_ID_CHILD_ELEMENT
+(
+    CHILD_ID                     BIGINT GENERATED BY DEFAULT AS IDENTITY (START WITH 1) PRIMARY KEY,
+    NAME                         VARCHAR(100),
+    CUSTOM_ID_DUMMY_ENTITY       BIGINT
+);
+CREATE TABLE CUSTOM_ID_GRAND_CHILD_ELEMENT
+(
+    ID                           BIGINT GENERATED BY DEFAULT AS IDENTITY (START WITH 1) PRIMARY KEY,
+    CONTENT                      VARCHAR(100),
+    CUSTOM_ID_CHILD_ELEMENT      BIGINT
+);