Unsuccessful: alter table XXX drop constraint YYY in Hibernate/JPA/HSQLDB standalone

Question

I am trying to run some Hibernate/JPA examples using an in-memory HSQL DB. The error message I get is the following:

13:54:21,427 ERROR SchemaExport:425 - HH         


        

Answer 1

We faced same issue while trying to create a simple login window in Spring. There were two tables user and role both with primary key id type of BIGINT. These we mapped (Many-to-Many) into another table user_roles with two columns user_id and role_id as foreign keys.

The problem was the role_id column in user_roles table, it was of int type and not compatible for the foreign key to role. When the type was modified to BIGINT errors were rectified.