Description:
From Stack Overflow:
https://stackoverflow.com/questions/65078455/mysql-jdbc-driver-incorrectly-reports-bigint-...
MySQL (like most SQL databases) does not call its 64-bit integer datatype a "long". It's a "bigint". Ok, fine.
But the MySQL JDBC driver (8.0.22) incorrectly returns this column as java.math.BigInteger, which it isn't.
Yes, I could convert the BigInteger into a long in my application code, but this turns out to be really inconvenient for some internal, application-specific reasons.
Is there any way to force the driver to return the correct data type, which should be a java.lang.Long?
Update
Per the comment, yes, it appears that regular select statements do return the column as a java.lang.Long. My bad.
Where it is failing is when it returns generated keys after an insert. There, the column comes back as a BigInteger.
How to repeat:
Here's the code:
public static void main(String[] args) throws SQLException {
Connection conn = DriverManager
.getConnection("jdbc:mysql://localhost:3306/mydb?useSSL=false&allowPublicKeyRetrieval=true&user=root");
Statement state = conn.createStatement();
state.executeUpdate("drop table if exists foo");
state.executeUpdate("create table foo (id bigint auto_increment, name varchar(255), primary key(id))");
state.executeUpdate("insert into foo (name) values ('bob')", Statement.RETURN_GENERATED_KEYS);
ResultSet rs = state.getGeneratedKeys();
rs.next();
Object obj = rs.getObject(1);
System.out.println(obj);
System.out.println(obj.getClass());
conn.close();
}
returns:
1
class java.math.BigInteger
