Thanks! Actually, I want the outer join first. If it finds something, then move on to the inner join and filter out all those that don't join to a rec with 'autosmoke'. But if the outer join does not connect to the workarea_env table, then just return what you have (the purpose of the outer join)
On Mon, Jun 29, 2020 at 9:10 PM David G. Johnston < david.g.johns...@gmail.com> wrote: > On Monday, June 29, 2020, David Gauthier <davegauthie...@gmail.com> wrote: > >> >> sqf_id | sqf_sl | as_cl | >> wa_id | type >> >> >> ----------------------------------------------------+---------+---------+-------+----------- >> >> * arazhang_20.06.28-20:59:06_soc_navi24_main@4404799 | 4404957 | 4405363 >> | 2772 | autosmoke* >> >> arazhang_20.06.28-20:59:06_soc_navi24_main@4404799 | 4404957 | 4405363 >> | 2773 | >> >> arazhang_20.06.28-20:59:06_soc_navi24_main@4404799 | 4404957 | 4405363 >> | 2774 | >> >> * bgregory_20.06.29-09:46:49_raphael_main@1277530 | 1277949 | >> | |* >> (4 rows) >> >> >> dvm.workarea_env on >> dvdb-# >> (sqf.sqf_runs.submitted_changelist=dvm.workarea_env.p4_changelist) >> dvdb-# *inner join* dvm.dvm_events on >> dvdb-# (dvm.workarea_env.wa_id = dvm.dvm_events.wa_id >> and dvm.dvm_events.type = 'autosmoke') >> dvdb-# where sqf.sqf_Runs.submitted_shelvelist in (4404957,1277949); >> sqf_id | sqf_sl | as_cl | >> wa_id | type >> >> ----------------------------------------------------+---------+---------+-------+----------- >> arazhang_20.06.28-20:59:06_soc_navi24_main@4404799 | 4404957 | 4405363 >> | 2772 | autosmoke >> (1 row) >> >> >> Is there a way to retain the effect of that first outer join while >> enforcing that inner join ? >> > > The quick non-testable answer is most likely. I usually end up doing > trial-and-error and adding possibly unnecessary parentheses to force the > needed order of operations (or moving part of the join into an explicit > subquery, possibly using a CTE/WITH). Right now it seems that the query is > forcing, via the inner join, a final output where the column > type=‘autosmoke’. i.e., its doing the outer join first then the inner. > You seem to want the reverse. > > David J. > >
