Hi Michele, I'm looking here the results... If I get where and natural join is different.
The explain is like that: http://stackoverflow.com/questions/15996226/natural-join-vs-where-in-clauses Here is massimo suggested code: mysql> explain SELECT groups.name, city.name, auth_user.id, auth_user.is_active, auth_user.created_on, auth_user.created_by, auth_user.modified_on, auth_user.modified_by, auth_user.email, auth_user.person_id, auth_user.password, auth_user.know_id, auth_user.registration_key, auth_user.reset_password_key, auth_user.registration_id FROM researcher, researcher_lab_permission, lab, groups, auth_user, city WHERE ((((((((groups.id = lab.group_id) AND (lab.id= researcher_lab_permission.lab_id)) AND ( researcher.id = researcher_lab_permission.researcher_id)) AND (researcher.user_id = auth_user.id)) AND (researcher_lab_permission.is_active = 'T')) AND (lab.is_active = 'T')) AND (groups.is_active = 'T')) AND (auth_user.is_active = 'T')) -> ; +----+-------------+---------------------------+--------+--------------------------------+---------+---------+------------------------------------------------+------+--------------------------------+ | id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra | +----+-------------+---------------------------+--------+--------------------------------+---------+---------+------------------------------------------------+------+--------------------------------+ | 1 | SIMPLE | city | ALL | NULL | NULL | NULL | NULL | 5535 | | | 1 | SIMPLE | researcher_lab_permission | ALL | researcher_id__idx,lab_id__idx | NULL | NULL | NULL | 2 | Using where; Using join buffer | | 1 | SIMPLE | lab | eq_ref | PRIMARY,group_id__idx | PRIMARY | 4 | labsyn.researcher_lab_permission.lab_id | 1 | Using where | | 1 | SIMPLE | groups | eq_ref | PRIMARY | PRIMARY | 4 | labsyn.lab.group_id | 1 | Using where | | 1 | SIMPLE | researcher | eq_ref | PRIMARY,user_id__idx | PRIMARY | 4 | labsyn.researcher_lab_permission.researcher_id | 1 | | | 1 | SIMPLE | auth_user | eq_ref | PRIMARY | PRIMARY | 4 | labsyn.researcher.user_id | 1 | Using where | +----+-------------+---------------------------+--------+--------------------------------+---------+---------+------------------------------------------------+------+--------------------------------+ Here is with JOIN: explain SELECT l.id,g.name,c.name FROM researcher_lab_permission as rl JOIN lab as l -> JOIN researcher as r JOIN auth_user as a JOIN groups as g JOIN city as c -> ON rl.researcher_id = r.id AND rl.lab_id = l.id AND a.id= r.user_id AND l.group_id = g.id -> AND c.id = g.city_id -> ; +----+-------------+-------+--------+--------------------------------+-----------------+---------+-------------------------+------+--------------------------------+ | id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra | +----+-------------+-------+--------+--------------------------------+-----------------+---------+-------------------------+------+--------------------------------+ | 1 | SIMPLE | l | index | PRIMARY,group_id__idx | group_id__idx | 5 | NULL | 2 | Using index | | 1 | SIMPLE | rl | ALL | researcher_id__idx,lab_id__idx | NULL | NULL | NULL | 2 | Using where; Using join buffer | | 1 | SIMPLE | a | index | PRIMARY | created_by__idx | 5 | NULL | 2 | Using index; Using join buffer | | 1 | SIMPLE | r | eq_ref | PRIMARY,user_id__idx | PRIMARY | 4 | labsyn.rl.researcher_id | 1 | Using where | | 1 | SIMPLE | g | eq_ref | PRIMARY,city_id__idx | PRIMARY | 4 | labsyn.l.group_id | 1 | | | 1 | SIMPLE | c | eq_ref | PRIMARY | PRIMARY | 4 | labsyn.g.city_id | 1 | | +----+-------------+-------+--------+--------------------------------+-----------------+---------+-------------------------+------+--------------------------------+ Without natural join it's getting all the cities first without any optimizations. So I observed that that code was not filtering cities. Now works great: rows = db(db.groups.id == db.lab.group_id)(db.groups.city_id == db.city.id)( db.lab.id == db.researcher_lab_permission.lab_id)(db.researcher.id == db.researcher_lab_permission.researcher_id)(db.researcher.user_id == db.auth_user.id).select(db.groups.name,db.city.name) Thank you guys! 2013/10/30 Michele Comitini <michele.comit...@gmail.com> > implicit inner join vs explicit should be same in speed terms, but... > > http://stackoverflow.com/questions/5273942/mysql-inner-join-vs-where > > > > > 2013/10/30 Diogo Munaro <diogo.mvie...@gmail.com> > >> I really need these joins to filter tables instead of join all and then >> make a filter with WHERE (spend a long time). >> >> I only need these 2 fields. >> >> My query works great with db.executesql but I'm not working with dal >> optimizations, like table record versioning, and need to do some where >> statment by myself (is_active). >> >> It's a DAL bug? I'm using web2py 2.7.2 >> >> >> 2013/10/30 Massimo Di Pierro <massimo.dipie...@gmail.com> >> >>> What fields do you need to select. We can optimize this. >>> >>> >>> On Wednesday, 30 October 2013 05:17:09 UTC-5, Diogo Munaro wrote: >>> >>>> I'ts working, but it's results a WHERE JOIN and takes much more time >>>> than JOIN sintax :( >>>> >>>> >>>> 2013/10/29 Massimo Di Pierro <massimo....@gmail.com> >>>> >>>>> Try this: >>>>> >>>>> rows = db(db.groups.id == db.lab.group_id)(db.lab.id == >>>>> db.researcher_lab_permission.l****ab_id)(db.researcher.id == >>>>> db.researcher_lab_permission.r****esearcher_id)(db.researcher.us****er_id >>>>> == db.auth_user.id).select(db.****groups.name <http://db.groups.name/> >>>>> ,db.city.name,db.**au**th_user.ALL) >>>>> >>>>> >>>>> On Monday, 28 October 2013 21:46:28 UTC-5, Diogo Munaro wrote: >>>>> >>>>>> Here is the sql generated: >>>>>> >>>>>> SELECT groups.name, city.name, auth_user.email, name1.id, >>>>>> name1.is_active, name1.created_on, name1.created_by, name1.modified_on, >>>>>> name1.modified_by, name1.user_id, name1.image, name1.image_file, >>>>>> name1.lattes, name2.id, name2.is_active, name2.created_on, >>>>>> name2.created_by, name2.modified_on, name2.modified_by, name2.site, >>>>>> name2.url, name2.cnpj, name2.type_id, name2.group_id, name2.privacity >>>>>> FROM >>>>>> researcher_lab_permission, researcher, lab JOIN groups ON ((groups.id= >>>>>> lab.group_id) AND (groups.is_active = 'T')) JOIN city ON ( >>>>>> city.id = groups.city_id) JOIN auth_user ON ((researcher.user_id = >>>>>> auth_user.id) AND (auth_user.is_active = 'T')) JOIN `researcher` AS >>>>>> name1 ON (researcher.id = researcher_lab_permission.**rese**archer_id) >>>>>> JOIN `lab` AS name2 ON ((lab.id = researcher_lab_permission.lab_****id) >>>>>> AND (lab.is_active = 'T')) >>>>>> >>>>>> Some JOINS are wrong >>>>>> >>>>>> >>>>>> 2013/10/29 Diogo Munaro <diogo....@gmail.com> >>>>>> >>>>>>> I need these joins because I need filter some tables without >>>>>>> selecting all the tables and filtering with where. Anyway, I tried: >>>>>>> >>>>>>> rows = (db.groups.id == db.lab.group_id)(db.lab.id == >>>>>>> db.researcher_lab_permission.l****ab_id)(db.researcher.id == >>>>>>> db.researcher_lab_permission.r****esearcher_id)(db.researcher.us****er_id >>>>>>> == db.auth_user.id).select(db.****groups.name<http://db.groups.name/> >>>>>>> ,db.city.name,db.**au**th_user.ALL) >>>>>>> >>>>>>> And it returns: >>>>>>> <type 'exceptions.TypeError'> 'Query' object is not callable >>>>>>> I'm using db.executesql and it's working: >>>>>>> >>>>>>> db.executesql('''SELECT l.id,g.name,c.name FROM >>>>>>> researcher_lab_permission as rl JOIN lab as l >>>>>>> JOIN researcher as r JOIN auth_user as a JOIN groups >>>>>>> as g JOIN city as c >>>>>>> ON rl.researcher_id = r.id AND rl.lab_id = l.id AND >>>>>>> a.id = r.user_id AND l.group_id = g.id >>>>>>> AND c.id = g.city_id WHERE a.id = %s''' >>>>>>> %(auth.user_id)) >>>>>>> >>>>>>> Something strange with DAL... >>>>>>> >>>>>>> 2013/10/28 Massimo Di Pierro <massimo....@gmail.com> >>>>>>> >>>>>>>> (db.groups.**id <http://db.groups.id/> == db.lab.group_id)( >>>>>>>> db.lab.id == db.researcher_lab_permission.**l****ab_id)(db.** >>>>>>>> researcher.id <http://db.researcher.id/> == >>>>>>>> db.researcher_lab_permission.**r****esearcher_id)(db.researcher.** >>>>>>>> us****er_id == >>>>>>>> db.auth_user.id).select(db.****groups.name<http://db.groups.name/> >>>>>>>> ,db.**city.name <http://db.city.name/>,db.**au**th_user.ALL) >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>> -- >>>>> Resources: >>>>> - http://web2py.com >>>>> - http://web2py.com/book (Documentation) >>>>> - http://github.com/web2py/**web2py >>>>> <http://github.com/web2py/web2py>(Source code) >>>>> - >>>>> https://code.google.com/p/**web2py/issues/list<https://code.google.com/p/web2py/issues/list>(Report >>>>> Issues) >>>>> --- >>>>> You received this message because you are subscribed to a topic in the >>>>> Google Groups "web2py-users" group. >>>>> To unsubscribe from this topic, visit https://groups.google.com/d/** >>>>> topic/web2py/0YdtJwCEdl4/**unsubscribe<https://groups.google.com/d/topic/web2py/0YdtJwCEdl4/unsubscribe> >>>>> . >>>>> To unsubscribe from this group and all its topics, send an email to >>>>> web2py+un...@**googlegroups.com. >>>>> >>>>> For more options, visit >>>>> https://groups.google.com/**groups/opt_out<https://groups.google.com/groups/opt_out> >>>>> . >>>>> >>>> >>>> -- >>> Resources: >>> - http://web2py.com >>> - http://web2py.com/book (Documentation) >>> - http://github.com/web2py/web2py (Source code) >>> - https://code.google.com/p/web2py/issues/list (Report Issues) >>> --- >>> You received this message because you are subscribed to a topic in the >>> Google Groups "web2py-users" group. >>> To unsubscribe from this topic, visit >>> https://groups.google.com/d/topic/web2py/0YdtJwCEdl4/unsubscribe. >>> To unsubscribe from this group and all its topics, send an email to >>> web2py+unsubscr...@googlegroups.com. >>> >>> For more options, visit https://groups.google.com/groups/opt_out. >>> >> >> -- >> Resources: >> - http://web2py.com >> - http://web2py.com/book (Documentation) >> - http://github.com/web2py/web2py (Source code) >> - https://code.google.com/p/web2py/issues/list (Report Issues) >> --- >> You received this message because you are subscribed to the Google Groups >> "web2py-users" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to web2py+unsubscr...@googlegroups.com. >> >> For more options, visit https://groups.google.com/groups/opt_out. >> > > -- > Resources: > - http://web2py.com > - http://web2py.com/book (Documentation) > - http://github.com/web2py/web2py (Source code) > - https://code.google.com/p/web2py/issues/list (Report Issues) > --- > You received this message because you are subscribed to a topic in the > Google Groups "web2py-users" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/web2py/0YdtJwCEdl4/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > web2py+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/groups/opt_out. > -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups "web2py-users" group. 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