Explain output question - Mailing list pgsql-general
| From | Patrick Hatcher |
|---|---|
| Subject | Explain output question |
| Date | |
| Msg-id | OF9007578A.E468134D-ON88256F27.005F777C-88256F27.0060B839@fds.com Whole thread Raw |
| Responses |
Re: Explain output question
|
| List | pgsql-general |
I have the following SQL with explain
Should I be concerned with the merge cond: Merge Cond: (("outer".masked_acct_id)::text = "inner"."?column5?")? I have no idea what column5 is or the same token the column6 shown later.
explain
select fed.indiv_fkey,
SUM(agg.purch_dollars) as val_purch_store,
SUM(agg.no_visits) as cnt_visit_store,
SUM(CASE x.gmmid when 1 Then agg.purch_dollars else 0 end) as Store_GMM1_Jewelryn,
SUM(CASE x.gmmid when 2 Then agg.purch_dollars else 0 end) as Store_GMM2_CCn,
SUM(CASE x.gmmid when 3 Then agg.purch_dollars else 0 end) as Store_GMM3_Beautyn,
SUM(CASE x.gmmid when 4 Then agg.purch_dollars else 0 end) as Store_GMM4_RTWn,
SUM(CASE x.gmmid when 5 Then agg.purch_dollars else 0 end) as Store_GMM5_Mensn,
SUM(CASE x.gmmid when 6 Then agg.purch_dollars else 0 end) as Store_GMM6_Homen,
SUM(CASE x.gmmid when 7 Then agg.purch_dollars else 0 end) as Store_GMM7_Furnituren,
SUM(CASE x.gmmid when 8 Then agg.purch_dollars else 0 end) as Store_GMM8_Othern,
SUM(CASE when x.gmmid is null Then agg.purch_dollars else 0 end) as Store_GMM_NotMappedn
from cdm.cdm_fedcustomer fed
inner join cdm.cdm_fed_agg_purch agg
on fed.masked_acct_id = agg.masked_acct_id
inner join cdm.cdm_fed_agg_deptxreff x
on (agg.dept_key = x.dept_key and agg.fed_div = x.div)
where agg.fed_div in ('MCE','MCW','BUR','BON','RLG')
group by 1;
GroupAggregate (cost=6510420.27..6562483.23 rows=650787 width=27)
-> Sort (cost=6510420.27..6512047.23 rows=650787 width=27)
Sort Key: fed.indiv_fkey
-> Merge Join (cost=6010047.04..6447580.84 rows=650787 width=27)
Merge Cond: (("outer".masked_acct_id)::text = "inner"."?column5?")
-> Index Scan using fedcust_maskedactt_idx on cdm_fedcustomer fed (cost=0.00..411831.29 rows=6377392 width=29)
-> Sort (cost=6010047.04..6011674.00 rows=650787 width=39)
Sort Key: (agg.masked_acct_id)::text
-> Merge Join (cost=5738556.16..5947207.61 rows=650787 width=39)
Merge Cond: ((("outer".div)::text = "inner"."?column6?") AND ("outer".dept_key = "inner".dept_key))
-> Index Scan using fadept_div_idx on cdm_fed_agg_deptxreff x (cost=0.00..206.23 rows=5294 width=15)
-> Sort (cost=5738556.16..5805859.79 rows=26921450 width=46)
Sort Key: (agg.fed_div)::text, agg.dept_key
-> Seq Scan on cdm_fed_agg_purch agg (cost=0.00..1469685.99 rows=26921450 width=46)
Filter: (((fed_div)::text = 'MCE'::text) OR ((fed_div)::text = 'MCW'::text) OR ((fed_div)::text = 'BUR'::text) OR ((fed_div)::text = 'BON'::text) OR ((fed_div)::text = 'RLG'::text))
TIA
Patrick Hatcher
Macys.Com
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