Q:

Spring Boot PostgreSQL JPA @Query doesn't seem to be working

I am studying spring boot while referring to the book. 
I used DB for H2 in the book, but I worked with PostgreSQL. 
Using the query method in the book DB work well. 
However, when I start using Annotation Query, it doesn't work. 
Let's look at the code. 
application.properties
spring.datasource.driver-class-name=org.postgresql. Driver
spring.datasource.url=jdbc:postgresql://Heroku Postgres URL
spring.datasource.username=Heroku Postgres username
spring.datasource.password=Heroku Postgres password

spring.jpa.hibernate.ddl-auto=update
spring.jpa.generate-ddl=false
spring.jpa.show-sql=true
spring.jpa.database-platform=org.hibernate.dialect. PostgreSQLDialect
spring.jpa.properties.hibernate.format_sql=true
spring.jpa.properties.hibernate.temp.use_jdbc_metadata_defaults = false

java code
public interface BoardRepository extends CrudRepository<Board, Long> {
    @Query("SELECT b FROM study. Board b WHERE b.title like %? 1% ORDER BY b.seq DESC")
    List<Board> queryAnnotationTest1(String searchKeyword);

    /*@Query("SELECT b FROM study. Board b " 
    + "WHERE b.title like %:searchKeyword% " 
    + "ORDER BY b.seq DESC")
    List<Board> queryAnnotationTest2(@Param("searchKeyword") String searchKeyword);*/
}

@RunWith(SpringRunner.class)
@SpringBootTest
public class QueryMethodTest {
    @Autowired
    private BoardRepository repository;

    public void testQueryAnnotationTest1() {
        List<Board> boardList = repository.queryAnnotationTest2("test title 10");
        testPrintOutMethod(boardList);
    }

    private void testPrintOutMethod(List<Board> boardList) {
        System.out.println("test result");
        for (Board board : boardList) {
            System.out.println("---> " + board.toString());
        }
    }
}

Error Message. 
2019-10-08 16:21:53.038  WARN 10880 --- [           main] aWebConfiguration$JpaWebMvcConfiguration : spring.jpa.open-in-view is enabled by default.  Therefore, database queries may be performed during view rendering.  Explicitly configure spring.jpa.open-in-view to disable this warning
2019-10-08 16:21:53.470  INFO 10880 --- [           main] o.h.h.i. QueryTranslatorFactoryInitiator  : HHH000397: Using ASTQueryTranslatorFactory
2019-10-08 16:21:53.529  WARN 10880 --- [           main] o.s.w.c.s. GenericWebApplicationContext   : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory. BeanCreationException: Error creating bean with name 'requestMappingHandlerMapping' defined in class path resource [org/springframework/web/servlet/config/annotation/DelegatingWebMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans. BeanInstantiationException: Failed to instantiate [org.springframework.web.servlet.mvc.method.annotation. RequestMappingHandlerMapping]: Factory method 'requestMappingHandlerMapping' threw exception; nested exception is org.springframework.beans.factory. BeanCreationException: Error creating bean with name 'mvcConversionService' defined in class path resource [org/springframework/web/servlet/config/annotation/DelegatingWebMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans. BeanInstantiationException: Failed to instantiate [org.springframework.format.support. FormattingConversionService]: Factory method 'mvcConversionService' threw exception; nested exception is org.springframework.beans.factory. BeanCreationException: Error creating bean with name 'boardRepository': Invocation of init method failed; nested exception is java.lang. IllegalArgumentException: Validation failed for query for method public abstract java.util. List com.limsr.testproject.persistence. BoardRepository.queryAnnotationTest1(java.lang. String)! 
2019-10-08 16:21:53.531  INFO 10880 --- [           main] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'
2019-10-08 16:21:53.535  INFO 10880 --- [           main] com.zaxxer.hikari. HikariDataSource       : HikariPool-1 - Shutdown initiated...
2019-10-08 16:21:55.151  INFO 10880 --- [           main] com.zaxxer.hikari. HikariDataSource       : HikariPool-1 - Shutdown completed. 
2019-10-08 16:21:55.164  INFO 10880 --- [           main] ConditionEvaluationReportLoggingListener : 

Error starting ApplicationContext.  To display the conditions report re-run your application with 'debug' enabled. 
2019-10-08 16:21:55.173 ERROR 10880 --- [           main] o.s.boot. SpringApplication               : Application run failed

org.springframework.beans.factory. BeanCreationException: Error creating bean with name 'requestMappingHandlerMapping' defined in class path resource [org/springframework/web/servlet/config/annotation/DelegatingWebMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans. BeanInstantiationException: Failed to instantiate [org.springframework.web.servlet.mvc.method.annotation. RequestMappingHandlerMapping]: Factory method 'requestMappingHandlerMapping' threw exception; nested exception is org.springframework.beans.factory. BeanCreationException: Error creating bean with name 'mvcConversionService' defined in class path resource [org/springframework/web/servlet/config/annotation/DelegatingWebMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans. BeanInstantiationException: Failed to instantiate [org.springframework.format.support. FormattingConversionService]: Factory method 'mvcConversionService' threw exception; nested exception is org.springframework.beans.factory. BeanCreationException: Error creating bean with name 'boardRepository': Invocation of init method failed; nested exception is java.lang. IllegalArgumentException: Validation failed for query for method public abstract java.util. List com.limsr.testproject.persistence. BoardRepository.queryAnnotationTest1(java.lang. String)! 
    at org.springframework.beans.factory.support. ConstructorResolver.instantiate(ConstructorResolver.java:627) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.beans.factory.support. ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:456) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.beans.factory.support. AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1321) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.beans.factory.support. AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1160) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.beans.factory.support. AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.beans.factory.support. AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.beans.factory.support. AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.beans.factory.support. DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.beans.factory.support. AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.beans.factory.support. AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.beans.factory.support. DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:845) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.context.support. AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:877) ~[spring-context-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.context.support. AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) ~[spring-context-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.boot. SpringApplication.refresh(SpringApplication.java:744) ~[spring-boot-2.1.8.RELEASE.jar:2.1.8.RELEASE]
    at org.springframework.boot. SpringApplication.refreshContext(SpringApplication.java:391) ~[spring-boot-2.1.8.RELEASE.jar:2.1.8.RELEASE]
    at org.springframework.boot. SpringApplication.run(SpringApplication.java:312) ~[spring-boot-2.1.8.RELEASE.jar:2.1.8.RELEASE]
    at org.springframework.boot.test.context. SpringBootContextLoader.loadContext(SpringBootContextLoader.java:120) [spring-boot-test-2.1.8.RELEASE.jar:2.1.8.RELEASE]
    at org.springframework.test.context.cache. DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:99) [spring-test-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.test.context.cache. DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:117) [spring-test-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.test.context.support. DefaultTestContext.getApplicationContext(DefaultTestContext.java:108) [spring-test-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.test.context.web. ServletTestExecutionListener.setUpRequestContextIfNecessary(ServletTestExecutionListener.java:190) [spring-test-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.test.context.web. ServletTestExecutionListener.prepareTestInstance(ServletTestExecutionListener.java:132) [spring-test-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.test.context. TestContextManager.prepareTestInstance(TestContextManager.java:246) [spring-test-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:227) [spring-test-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:289) [spring-test-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.junit.internal.runners.model. ReflectiveCallable.run(ReflectiveCallable.java:12) [junit-4.12.jar:4.12]
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.methodBlock(SpringJUnit4ClassRunner.java:291) [spring-test-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:246) [spring-test-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97) [spring-test-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.junit.runners. ParentRunner$3.run(ParentRunner.java:290) [junit-4.12.jar:4.12]
    at org.junit.runners. ParentRunner$1.schedule(ParentRunner.java:71) [junit-4.12.jar:4.12]
    at org.junit.runners. ParentRunner.runChildren(ParentRunner.java:288) [junit-4.12.jar:4.12]
    at org.junit.runners. ParentRunner.access$000(ParentRunner.java:58) [junit-4.12.jar:4.12]
    at org.junit.runners. ParentRunner$2.evaluate(ParentRunner.java:268) [junit-4.12.jar:4.12]
    at org.springframework.test.context.junit4.statements. RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) [spring-test-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.test.context.junit4.statements. RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70) [spring-test-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.junit.runners. ParentRunner.run(ParentRunner.java:363) [junit-4.12.jar:4.12]
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190) [spring-test-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.eclipse.jdt.internal.junit4.runner. JUnit4TestReference.run(JUnit4TestReference.java:89) [.cp/:na]
    at org.eclipse.jdt.internal.junit.runner. TestExecution.run(TestExecution.java:41) [.cp/:na]
    at org.eclipse.jdt.internal.junit.runner. RemoteTestRunner.runTests(RemoteTestRunner.java:541) [.cp/:na]
    at org.eclipse.jdt.internal.junit.runner. RemoteTestRunner.runTests(RemoteTestRunner.java:763) [.cp/:na]
    at org.eclipse.jdt.internal.junit.runner. RemoteTestRunner.run(RemoteTestRunner.java:463) [.cp/:na]
    at org.eclipse.jdt.internal.junit.runner. RemoteTestRunner.main(RemoteTestRunner.java:209) [.cp/:na]

There are countless messages beneath this, but they are not limited by the letter limit. 
Is it a query problem?  I tried to enter the query directly but it worked fine. 
But I don't know where the problem is. 
Is it using PostgreSQL rather than H2, or is there some other error? 

A:

Exceptions says that: Validation failed for query for method public abstract java.util. List com.limsr.testproject.persistence. BoardRepository.queryAnnotationTest1(java.lang. String)!,  so the error is in query syntax.  
I think the error is in the name of the entity.  Try to remove study from study. Board. 
So the query will be like SELECT b FROM Board b WHERE b.title like %? 1% ORDER BY b.seq DESC
Based on https://www.objectdb.com/java/jpa/entity/types#Entity_Classes_

Entity classes are represented in queries by entity names.  By default, the entity name is the unqualified name of the entity class (i.e. the short class name excluding the package name).  A different entity name can be set explicitly by using the name attribute of the Entity annotation. Entity names must be unique.  When two entity classes in different packages share the same class name, explicit entity name setting is required to avoid collision. 

Or, if you have Board as table, not as entity name, and you query is native (Not JPQL), you can use @Query("SELECT b FROM study. Board b WHERE b.title like %? 1% ORDER BY b.seq DESC", nativeQuery = true)

