Method org.postgresql.jdbc.PgConnection.createClob() is not yet implemented

Add this property in your application.properties :

spring.jpa.properties.hibernate.jdbc.lob.non_contextual_creation=true

Reference :

• https://github.com/spring-projects/spring-boot/issues/12007#issuecomment-369388646

This is an issue of Hibernate, as a workaround you can use the following flag. Then set up the following config in your properties:

spring.jpa.properties.hibernate.jdbc.lob.non_contextual_creation=true

For Spring boot 2.x.x this flag simply disable contextual LOB creation, but if you really want to know the properly answer check UPDATE V1.

UPDATED V1

This was a Hibernate issue. If you use Spring Boot latest version from 2.0.x until 2.1.x includes Hibernate 5.3.10.final you can take a look here but this issue was fixed on Hibernate version 5.4.0.CR1 then you need to add that dependency or if it is possible the latest version:

For Gradle:

compile('org.hibernate:hibernate-core:5.4.2.Final')

For Maven:

<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-core</artifactId>
    <version>5.4.2.Final</version>
</dependency>

UPDATED V2 "SPRING BOOT 2.2.0.M(1-4)"

In addition Spring boot v2.2.0.Mx includes now Hibernate v5.4.x then this issue was fixed for these versions.

I had the similar issue. I followed this solution and it worked for me

http://vkuzel.blogspot.com/2016/03/spring-boot-jpa-hibernate-atomikos.html

# Disable feature detection by this undocumented parameter. Check the org.hibernate.engine.jdbc.internal.JdbcServiceImpl.configure method for more details.
spring.jpa.properties.hibernate.temp.use_jdbc_metadata_defaults = false

# Because detection is disabled you have to set correct dialect by hand.
spring.jpa.database-platform=org.hibernate.dialect.PostgreSQL9Dialect

Solved by using following Yaml configuration:

spring:
  jpa:
    properties:
      hibernate:
        jdbc:
          lob:
            non_contextual_creation: true
    database-platform: org.hibernate.dialect.PostgreSQL9Dialect

Solved by adding hibernate.properties with

hibernate.jdbc.lob.non_contextual_creation=true

Other solutions with application.properties didn't work. This can be also done via XML hibernate.cfg.xml

Spring Boot version: 2.0.2.RELEASE