Java Hibernate-查询中的括号错误

Question

In my function I created a condition like this:

and (o.status != :shipped or (o.status = :cancelled and sp.cancelledQt != sp.requestedQt))

If I enable query logging this condition becomes:

and (shipmentor0_.status<>? or shipmentor0_.status=? and positions1_.cancelledQt<>positions1_.requestedQt)

As you can see the parenthesis are in a different order than I wrote.

What am I doing wrong?

Answer 1

This is because the internal parenthesis is not necessary. The "And" operator precedence is higher then the "Or" operator. But you can keep it to make it more readable.

Answer 2

Nothing.

Hibernate it's just taking advantage of the distributive property of the logical disjunction (fancy name for "OR") to redact your query in a more efficient way.

It is one of the pros of using an ORM instead of plain JDBC.