Map a tinyint as boolean hibernate

Better use BIT(1) instead of TINYINT(1)

@Column(nullable = false, columnDefinition = "BIT", length = 1)
private boolean flag = false;

From what I read here :

org.hibernate.HibernateException: Wrong column type in maegul.users for column admin. Found: bit, expected: integer

It seems Hibernate is expecting an integer and got a bit.

Which mean your annotation is now correct :

@Type(type = "org.hibernate.type.NumericBooleanType")

But maybe it has updated your database to set as Bit instead of integer, thus the error.

If you really need a TinyInt, you can use @Type AND @Column, to set as Integer, of type TinyInt :

@Column(columnDefinition = "TINYINT")
@Type(type = "org.hibernate.type.NumericBooleanType")
public boolean admin = true;

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