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 the Google Groups "web2py-users" group. 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