[hibernate-issues] [Hibernate-JIRA] Created: (HHH-2289) CLONE -Support new MySQL 5.0.12 join syntax

[Peter Lundberg (JIRA)]

CLONE -Support new MySQL 5.0.12 join syntax
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         Key: HHH-2289
         URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2289
     Project: Hibernate3
        Type: New Feature

  Components: query-sql  
    Versions: 3.1.2    
    Reporter: Peter Lundberg


http://dev.mysql.com/doc/refman/5.0/en/join.html

"Beginning with MySQL 5.0.12, natural joins and joins with USING, including outer join variants, are processed according to the SQL:2003 standard. These changes make MySQL more compliant with standard SQL. However, they can result in different output columns for some joins. Also, some queries that appeared to work correctly in older versions must be rewritten to comply with the standard. The following list provides more detail about several effects of the 5.0.12 change in join processing. The term "previously" means "prior to MySQL 5.0.12."

Using 5.0.18 and hibernate 3.1.2, hibernate is not producing the correct join syntax for the latest versions of mysql. 

For example:

  FROM tableA AS A, tableB AS B INNER JOIN tableC AS C ON A.field1 =
C.field2

The above fails, because the B JOIN C is evaluated before the A alias has
been created.

The solution is to use parentheses to force an order of evaluation:

  FROM (tableA AS A, tableB AS B) INNER JOIN tableC AS C ON A.field1 =
C.field2 

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