SpringJPA convert DB2 Negative Numeric type in Positive number

Question

I'm using Spring Boot with JPA and a Db2 database on an AS400 server.

When I inspect the result of a SELECT statement using the debugger tool, the value stored in the volume column is always positive. However, when I inspect the value in DBeaver, it is negative. For example, -10.02 in DBeaver is 10.02 in BigDecimal.

This problem does not occur when I retrieve data from a Postgres database in which the column has the same type and the same precision.

@Column(name = "volume", nullable = false, precision=9, scale=3)
private BigDecimal volume;