Why is this alias in JPA named native query not working?

Question

This one does not work:

<named-native-query name="FileSet.deleteByMemberId">
    <query>DELETE FROM FileSet f WHERE f.file_id = :fileId</query>
</named-native-query>

It gives this error:

ERROR: You have an error in your SQL syntax; check the manual that corresponds to
your MySQL server version for the right syntax to use near
'f WHERE f.file_id = 692' at line 1

While this statement works perfectly (without the table alias):

<named-native-query name="FileSet.deleteByMemberId">
    <query>DELETE FROM FileSet WHERE file_id = :fileId</query>
</named-native-query>

Why? I'm using MySQL and Hibernate as JPA provider.

Answer 1

请参见MySQL DELETE - DELETE中没有别名的语法定义。

Answer 2

Apparently, this query works:

<named-native-query name="FileSet.deleteByMemberId">
    <query>DELETE f FROM FileSet f WHERE f.file_id = :fileId</query>
</named-native-query>

The MySQL docs only mention this far down the page:

If you declare an alias for a table, you must use the alias when referring to the table: DELETE t1 FROM test AS t1, test2 WHERE ...