Unable to map List<String> by Hibernate in PostgreSql - postgresql

Question

I would like to do easy think - map list of String in database using hibernate.
I am able to do it when my hibernate.hbm2ddl.auto is set to create or create-drop.
If i change it to update it throws me an error during building Session Factory.
I checked that columns in db exists.
During debbuging it i found that in SchemaMigratorImpl.doMigrationToTargets Hibernate method
in field namespace primaryKey for table ITEM_POSITIONS is corrupted.
Does anyone know what i am doing wrong?
Stacktrace:
Exception in thread "main" javax.persistence.PersistenceException: [PersistenceUnit: HelloWorldPU] Unable to build Hibernate SessionFactory
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.persistenceException(EntityManagerFactoryBuilderImpl.java:877)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:805)
at org.hibernate.jpa.HibernatePersistenceProvider.createEntityManagerFactory(HibernatePersistenceProvider.java:58)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:55)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:39)
at util.HibernateUtil.getEntityManagerFactory(HibernateUtil.java:43)
at TestApp.main(TestApp.java:12)
Caused by: org.hibernate.exception.SQLGrammarException: Error accessing column metadata: ITEM_POSITIONS
at org.hibernate.exception.internal.SQLStateConversionDelegate.convert(SQLStateConversionDelegate.java:106)
at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:42)
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:109)
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:95)
at org.hibernate.tool.schema.extract.internal.InformationExtractorJdbcDatabaseMetaDataImpl.convertSQLException(InformationExtractorJdbcDatabaseMetaDataImpl.java:71)
at org.hibernate.tool.schema.extract.internal.InformationExtractorJdbcDatabaseMetaDataImpl.getForeignKeys(InformationExtractorJdbcDatabaseMetaDataImpl.java:631)
at org.hibernate.tool.schema.extract.internal.TableInformationImpl.foreignKeys(TableInformationImpl.java:88)
at org.hibernate.tool.schema.extract.internal.TableInformationImpl.getForeignKey(TableInformationImpl.java:99)
at org.hibernate.tool.schema.internal.SchemaMigratorImpl.findMatchingForeignKey(SchemaMigratorImpl.java:338)
at org.hibernate.tool.schema.internal.SchemaMigratorImpl.applyForeignKeys(SchemaMigratorImpl.java:318)
at org.hibernate.tool.schema.internal.SchemaMigratorImpl.doMigrationToTargets(SchemaMigratorImpl.java:157)
at org.hibernate.tool.schema.internal.SchemaMigratorImpl.doMigration(SchemaMigratorImpl.java:59)
at org.hibernate.tool.hbm2ddl.SchemaUpdate.execute(SchemaUpdate.java:129)
at org.hibernate.tool.hbm2ddl.SchemaUpdate.execute(SchemaUpdate.java:97)
at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:481)
at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:444)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:802)
... 5 more
Caused by: org.postgresql.util.PSQLException: ERROR: column t1.tgconstrname does not exists
Pozycja: 113
at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2102)
at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1835)
at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:257)
at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:500)
at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:374)
at org.postgresql.jdbc2.AbstractJdbc2Statement.executeQuery(AbstractJdbc2Statement.java:254)
at org.postgresql.jdbc2.AbstractJdbc2DatabaseMetaData.getImportedExportedKeys(AbstractJdbc2DatabaseMetaData.java:3373)
at org.postgresql.jdbc2.AbstractJdbc2DatabaseMetaData.getImportedKeys(AbstractJdbc2DatabaseMetaData.java:3566)
at org.hibernate.tool.schema.extract.internal.InformationExtractorJdbcDatabaseMetaDataImpl.getForeignKeys(InformationExtractorJdbcDatabaseMetaDataImpl.java:580)
... 16 more
Configuration:
Java 8
PostgreSql: postgresql-12.1-3-windows-x64
pom.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>hibernatemapping</groupId>
<artifactId>hibernatemapping</artifactId>
<version>1.0-SNAPSHOT</version>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>7</source>
<target>7</target>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>9.1-901.jdbc4</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>5.0.0.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>5.0.0.Final</version>
</dependency>
</dependencies>
</project>
persistence.xml:
<persistence
version="2.1"
xmlns="http://xmlns.jcp.org/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence_2_1.xsd">
<persistence-unit name="HelloWorldPU">
<class>domain.Item</class>
<exclude-unlisted-classes>true</exclude-unlisted-classes>
<properties>
<property name="hibernate.format_sql" value="true"/>
<property name="hibernate.show_sql" value="true"/>
<property name="hibernate.use_sql_comments" value="true"/>
<property name="hibernate.hbm2ddl.auto" value="update"/>
<property name="javax.persistence.jdbc.driver" value="org.postgresql.Driver"/>
<property name="javax.persistence.jdbc.url" value="jdbc:postgresql://localhost:5432/hibernate_db?useSSL=false"/>
<property name="javax.persistence.jdbc.user" value="postgres"/>
<property name="javax.persistence.jdbc.password" value="admin"/>
</properties>
</persistence-unit>
</persistence>
HibernateUtil Class which is responsible for creating EntityManager:
package util;
import org.hibernate.SessionFactory;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;
import org.hibernate.cfg.Environment;
import org.hibernate.service.ServiceRegistry;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import java.util.Properties;
public class HibernateUtil {
private static SessionFactory sessionFactory;
private static EntityManagerFactory entityManagerFactory;
public static SessionFactory getSessionFactory() {
if (sessionFactory == null) {
try {
Configuration configuration = new Configuration();
// Hibernate settings equivalent to hibernate.cfg.xml's properties
Properties settings = new Properties();
settings.put(Environment.DRIVER, "org.postgresql.Driver");
settings.put(Environment.URL, "jdbc:postgresql://localhost:5432/hibernate_db?useSSL=false");
settings.put(Environment.USER, "postgres");
settings.put(Environment.PASS, "admin");
settings.put(Environment.SHOW_SQL, "true");
settings.put(Environment.CURRENT_SESSION_CONTEXT_CLASS, "thread");
settings.put(Environment.HBM2DDL_AUTO, "auto-update");
configuration.setProperties(settings);
ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder()
.applySettings(configuration.getProperties()).build();
sessionFactory = configuration.buildSessionFactory(serviceRegistry);
} catch (Exception e) {
e.printStackTrace();
}
}
return sessionFactory;
}
public static EntityManagerFactory getEntityManagerFactory(){
if (entityManagerFactory == null) {
entityManagerFactory = Persistence.createEntityManagerFactory("HelloWorldPU");
}
return entityManagerFactory;
}
}
Entity class:
package domain;
import org.hibernate.annotations.Parameter;
import org.hibernate.annotations.*;
import javax.persistence.Entity;
import javax.persistence.*;
import java.util.*;
#Entity
public class Item {
#Id
#GeneratedValue(generator = "ID_GENERATOR")
#GenericGenerator(name = "ID_GENERATOR",
strategy = "enhanced-sequence",
parameters = {
#Parameter(name = "sequence_name",
value = "Item_sequence")
})
private Long id;
private String name;
#ElementCollection
#CollectionTable(name = "ITEM_POSITIONS")
#OrderColumn
#Column(name = "POSITIONS")
protected List<String> positions = new ArrayList<>();
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public List<String> getPositions() {
return positions;
}
public void setPositions(List<String> positions) {
this.positions = positions;
}
}
Test class:
import domain.Item;
import util.HibernateUtil;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.EntityTransaction;
import java.util.ArrayList;
import java.util.List;
public class TestApp {
public static void main(String[] args){
EntityManagerFactory emf = HibernateUtil.getEntityManagerFactory();
EntityManager em = emf.createEntityManager();
EntityTransaction transaction = em.getTransaction();
transaction.begin();
Item item = new Item();
item.setName("Item1");
List<String> positions = new ArrayList<>();
positions.add("Position1");
positions.add("Position2");
positions.add("Position3");
positions.add("Position4");
positions.add("Position5");
item.setPositions(positions);
em.persist(item);
transaction.commit();
em.close();
emf.close();
}
}
How to reproduce:
Run with property name="hibernate.hbm2ddl.auto" value="create"
Run with property name="hibernate.hbm2ddl.auto" value="update"
Set breakpoint in QueryExecutorImpl.receiveErrorResponse
Search invocation stack for SchemaMigratorImpl.doMigrationToTargets

Answer 1

I solved this issue.
I added this line to my pertsistence.xml
<!-- JDBC connection pool (use the built-in) -->
<property name="connection.pool_size">1</property>
And i changed driver to:
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>42.2.5</version>
</dependency>