title: findByName using Join in JPA @Query
body: <p>MovieCatalogue contains 2 fields of type MovieData and Rating(let's ignore this for now) respectively,
  MovieData contains &quot;String name&quot;, &quot;String description&quot; and a JoinColumn for MovieCatalogue.
  From table of MovieCatalogue, i want to get Movies by name from table MovieData. For which i join tables of MovieCatalogue and MovieData, compare where primary key = foreign key, i want to get movie name
  Kindly guide me what am i missing?
  I am getting</p>
  <blockquote>
  <p>ERROR: more than one row returned by a subquery used as an expression</p>
  </blockquote>
  <p>I want to get List of MovieCatalogues where MovieData.name match the queried name.</p>
  <pre><code>2022-03-08 12:58:17.418 ERROR 74552 --- [nio-8080-exec-4] o.h.engine.jdbc.spi.SqlExceptionHelper   : ERROR: more than one row returned by a subquery used as an expression
  2022-03-08 12:58:17.431 ERROR 74552 --- [nio-8080-exec-4] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.dao.DataIntegrityViolationException: could not extract ResultSet; SQL [n/a]; nested exception is org.hibernate.exception.DataException: could not extract ResultSet] with root cause
  
  org.postgresql.util.PSQLException: ERROR: more than one row returned by a subquery used as an expression
      at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2675) ~[postgresql-42.3.3.jar:42.3.3]
      at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:2365) ~[postgresql-42.3.3.jar:42.3.3]
      at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:355) ~[postgresql-42.3.3.jar:42.3.3]
      at org.postgresql.jdbc.PgStatement.executeInternal(PgStatement.java:490) ~[postgresql-42.3.3.jar:42.3.3]
      at org.postgresql.jdbc.PgStatement.execute(PgStatement.java:408) ~[postgresql-42.3.3.jar:42.3.3]
      at org.postgresql.jdbc.PgPreparedStatement.executeWithFlags(PgPreparedStatement.java:166) ~[postgresql-42.3.3.jar:42.3.3]
      at org.postgresql.jdbc.PgPreparedStatement.executeQuery(PgPreparedStatement.java:118) ~[postgresql-42.3.3.jar:42.3.3]
      at com.zaxxer.hikari.pool.ProxyPreparedStatement.executeQuery(ProxyPreparedStatement.java:52) ~[HikariCP-4.0.3.jar:na]
      at com.zaxxer.hikari.pool.HikariProxyPreparedStatement.executeQuery(HikariProxyPreparedStatement.java) ~[HikariCP-4.0.3.jar:na]
      at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.extract(ResultSetReturnImpl.java:57) ~[hibernate-core-5.6.5.Final.jar:5.6.5.Final]
      at org.hibernate.loader.Loader.getResultSet(Loader.java:2322) ~[hibernate-core-5.6.5.Final.jar:5.6.5.Final]
      at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:2075) ~[hibernate-core-5.6.5.Final.jar:5.6.5.Final]
      at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:2037) ~[hibernate-core-5.6.5.Final.jar:5.6.5.Final]
      at org.hibernate.loader.Loader.doQuery(Loader.java:956) ~[hibernate-core-5.6.5.Final.jar:5.6.5.Final]
      at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:357) ~[hibernate-core-5.6.5.Final.jar:5.6.5.Final]
      at org.hibernate.loader.Loader.doList(Loader.java:2868) ~[hibernate-core-5.6.5.Final.jar:5.6.5.Final]
      at org.hibernate.loader.Loader.doList(Loader.java:2850) ~[hibernate-core-5.6.5.Final.jar:5.6.5.Final]
      at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2682) ~[hibernate-core-5.6.5.Final.jar:5.6.5.Final]
      at org.hibernate.loader.Loader.list(Loader.java:2677) ~[hibernate-core-5.6.5.Final.jar:5.6.5.Final]
      at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:540) ~[hibernate-core-5.6.5.Final.jar:5.6.5.Final]
      at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:400) ~[hibernate-core-5.6.5.Final.jar:5.6.5.Final]
      at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:219) ~[hibernate-core-5.6.5.Final.jar:5.6.5.Final]
      at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1454) ~[hibernate-core-5.6.5.Final.jar:5.6.5.Final]
      at org.hibernate.query.internal.AbstractProducedQuery.doList(AbstractProducedQuery.java:1649) ~[hibernate-core-5.6.5.Final.jar:5.6.5.Final]
      at org.hibernate.query.internal.AbstractProducedQuery.list(AbstractProducedQuery.java:1617) ~[hibernate-core-5.6.5.Final.jar:5.6.5.Final]
      at org.hibernate.query.Query.getResultList(Query.java:165) ~[hibernate-core-5.6.5.Final.jar:5.6.5.Final]
      at org.springframework.data.jpa.repository.query.JpaQueryExecution$CollectionExecution.doExecute(JpaQueryExecution.java:128) ~[spring-data-jpa-2.6.2.jar:2.6.2]
      at org.springframework.data.jpa.repository.query.JpaQueryExecution.execute(JpaQueryExecution.java:90) ~[spring-data-jpa-2.6.2.jar:2.6.2]
      at org.springframework.data.jpa.repository.query.AbstractJpaQuery.doExecute(AbstractJpaQuery.java:155) ~[spring-data-jpa-2.6.2.jar:2.6.2]
      at org.springframework.data.jpa.repository.query.AbstractJpaQuery.execute(AbstractJpaQuery.java:143) ~[spring-data-jpa-2.6.2.jar:2.6.2]
      at org.springframework.data.repository.core.support.RepositoryMethodInvoker.doInvoke(RepositoryMethodInvoker.java:137) ~[spring-data-commons-2.6.2.jar:2.6.2]
      at org.springframework.data.repository.core.support.RepositoryMethodInvoker.invoke(RepositoryMethodInvoker.java:121) ~[spring-data-commons-2.6.2.jar:2.6.2]
      at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.doInvoke(QueryExecutorMethodInterceptor.java:159) ~[spring-data-commons-2.6.2.jar:2.6.2]
      at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.invoke(QueryExecutorMethodInterceptor.java:138) ~[spring-data-commons-2.6.2.jar:2.6.2]
      at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.16.jar:5.3.16]
      at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:80) ~[spring-data-commons-2.6.2.jar:2.6.2]
      at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.16.jar:5.3.16]
      at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:123) ~[spring-tx-5.3.16.jar:5.3.16]
      at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:388) ~[spring-tx-5.3.16.jar:5.3.16]
      at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:119) ~[spring-tx-5.3.16.jar:5.3.16]
      at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.16.jar:5.3.16]
      at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:137) ~[spring-tx-5.3.16.jar:5.3.16]
      at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.16.jar:5.3.16]
      at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:145) ~[spring-data-jpa-2.6.2.jar:2.6.2]
      at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.16.jar:5.3.16]
      at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:97) ~[spring-aop-5.3.16.jar:5.3.16]
      at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.16.jar:5.3.16]
      at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:215) ~[spring-aop-5.3.16.jar:5.3.16]
      at jdk.proxy2/jdk.proxy2.$Proxy104.findByName(Unknown Source) ~[na:na]
      at com.muhammadtaha.moviecatalogue.services.implimentations.MovieCatalogueServiceImpl.findByName(MovieCatalogueServiceImpl.java:32) ~[classes/:na]
      at com.muhammadtaha.moviecatalogue.controllers.MovieCatalogueController.getMovieCatalogue(MovieCatalogueController.java:31) ~[classes/:na]
      at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
      at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[na:na]
      at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
      at java.base/java.lang.reflect.Method.invoke(Method.java:568) ~[na:na]
      at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205) ~[spring-web-5.3.16.jar:5.3.16]
      at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:150) ~[spring-web-5.3.16.jar:5.3.16]
      at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:117) ~[spring-webmvc-5.3.16.jar:5.3.16]
      at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895) ~[spring-webmvc-5.3.16.jar:5.3.16]
      at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) ~[spring-webmvc-5.3.16.jar:5.3.16]
      at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.16.jar:5.3.16]
      at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1067) ~[spring-webmvc-5.3.16.jar:5.3.16]
      at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) ~[spring-webmvc-5.3.16.jar:5.3.16]
      at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.16.jar:5.3.16]
      at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.3.16.jar:5.3.16]
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:655) ~[tomcat-embed-core-9.0.58.jar:4.0.FR]
      at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.16.jar:5.3.16]
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:764) ~[tomcat-embed-core-9.0.58.jar:4.0.FR]
      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
      at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.58.jar:9.0.58]
      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
      at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.16.jar:5.3.16]
      at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.16.jar:5.3.16]
      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
      at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.16.jar:5.3.16]
      at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.16.jar:5.3.16]
      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
      at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.16.jar:5.3.16]
      at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.16.jar:5.3.16]
      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
      at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
      at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
      at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:540) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
      at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
      at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
      at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
      at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:359) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
      at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
      at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
      at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:889) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
      at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1735) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
      at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
      at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
      at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
      at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
      at java.base/java.lang.Thread.run(Thread.java:833) ~[na:na]
  </code></pre>
  <p>I have 2 classes</p>
  <p>MovieCatalogue.java</p>
  <pre><code>@Entity
  @Data
  @AllArgsConstructor
  @NoArgsConstructor
  @Builder
  public class MovieCatalogue{
      @Id
      @GeneratedValue(strategy = GenerationType.AUTO)
      private Long id;
  
      @OneToOne(cascade = CascadeType.ALL)
      @JoinColumn(name = &quot;data_id&quot;, referencedColumnName = &quot;id&quot;)
      private MovieData data;
  
  //    ignore Rating.java for brevity
  //    @OneToOne(cascade = CascadeType.ALL)
  //    @JoinColumn(name = &quot;rating_id&quot;, referencedColumnName = &quot;id&quot;)
  //    private Rating rating;
  }
  </code></pre>
  <p>MovieData.java</p>
  <pre><code>@Data
  @Entity
  @AllArgsConstructor
  @NoArgsConstructor
  @Builder
  public class MovieData {
      @Id
      @GeneratedValue(strategy = GenerationType.AUTO)
      private Long id;
  
      private String name;
      private String description;
  
      @OneToOne(mappedBy = &quot;data&quot;)
      @JsonIgnore
      private MovieCatalogue movieCatalogue;
  }
  </code></pre>
  <p>and a repository</p>
  <p>MovieCatalogueRepository.java</p>
  <pre><code>@Repository
  public interface MovieCatalogueRepository extends JpaRepository&lt;MovieCatalogue, Long&gt; {
  
      @Query(&quot;select distinct mc from MovieCatalogue mc join MovieData md on mc.data.id = (select md.id from MovieData md where md.name = :movieName)&quot;)
      Optional&lt;List&lt;MovieCatalogue&gt;&gt; findByName(String movieName);
  }
  </code></pre>