Spring-Data-Jpa Repository - Underscore on Entity Column Name

I solved this error by renaming field to the name without underscore.

@Column(name = "municipal_id", nullable = false)
private Integer municipalId; // <-- field was renamed

Please add the following properties to application.properties file:

spring.jpa.hibernate.naming-strategy=org.hibernate.cfg.ImprovedNamingStrategy

The underscore _ is a reserved character in Spring Data query derivation (see the reference docs for details) to potentially allow manual property path description. So there are two options you have:

1. Stick to the Java naming conventions of using camel-case for member variable names and everything will work as expected.
2. Escape the _ by using an additional underscore, i.e. rename your query method to findByMunicipal__idOrderByLastnameDesc(…).

I'd recommend the former as you're not going to alienate fellow Java developers :).