加入Hibernate HQL

Question

i'm trying to do a query on hql hibernate (version 3.5.3), the query includes several joins between different tables (4 tables). This is the query:

     SELECT (lot of stuff) 
     FROM InvestigationRule as ir
     JOIN InvestigationFormula as if ON (ir.tb33InvestigationFormula=if.idInvestigationFormula) 
     JOIN InvestigationEvent as ie ON (ir.tb27InvestigationEvent=ie.idInvestigationEvent) 
     JOIN InvestigationSectionEvent as ise ON (ie.eventSection=ise.sectionEventsCod)

I met a syntax error on first ON, can someone help me fix this, thx.

ps: i know that i can make joins even without using the JOIN command, this is the original query:

    SELECT (lot of stuff)  
    FROM InvestigationRule AS ir, 
         InvestigationEvent as ie, 
         InvestigationSectionEvent as ise, 
         InvestigationFormula as if 
          WHERE ir.dateValidityEnd is null 
          AND ir.tb27InvestigationEvent = ie.idInvestigationEvent 
          AND ir.tb33InvestigationFormula = if.idInvestigationFormula 
          AND ie.eventSection = ise.sectionEventsCod 

But i cannot use this form since it creates several CROSS JOIN(s) on the MySql database and this is not good.

Answer 1

if is a keyword in SQL so you have to Change the alias:

SELECT (lot of stuff) 
     FROM InvestigationRule as ir
     JOIN InvestigationFormula as iform ON (ir.tb33InvestigationFormula=iform.idInvestigationFormula) 
     JOIN InvestigationEvent as ie ON (ir.tb27InvestigationEvent=ie.idInvestigationEvent) 
     JOIN InvestigationSectionEvent as ise ON (ie.eventSection=ise.sectionEventsCod)

HQL Looks like:

SELECT (lot of stuff) 
     FROM InvestigationRule ir
     JOIN ir tb33InvestigationFormula iform
     JOIN ir.tb27InvestigationEvent ie 
     JOIN  ie.eventSection ise