是否可以将PostgreSQL中的字符字段转换为JPA命名查询中的整数？

Question

@Table(name = "Table")
class Table{
 String a
 Integer b
}

here column a in table t is character varying(32)

I have tried both of these and end-up with error.

SELECT t.b from Table t where Integer.parseInt(t.a) > 0 
Error : Caused by: org.postgresql.util.PSQLException: ERROR: schema "integer" does not exist

---

SELECT t.b from Table t where (t.a::integer) > 0 
Error : invalid token :: at line <line number>

Thanks

Answer 1

以下查询对我来说很好用。

SELECT t.b FROM table t WHERE CAST(t.a AS integer) > 0