Hi,
somehow my reply yesterday got lost, but nevertheless here comes the
explain analyze again. It's the explain of the operation that causes
this huge performance discrepancy. Unfortunately i had to perform the
explain analyze with an empty temp_table, because after the whole
operation is done, i delete the data again to save some space.
QUE
RY PLAN
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
-----
Result (cost=0.12..16.95 rows=390 width=108) (actual time=0.025..0.025
rows=0
loops=1)
One-Time Filter: ((((split_part(($1)::text, '_'::text, 2))::smallint
= 1) IS
NOT TRUE) AND (((split_part(($2)::text, '_'::text, 2))::smallint = 22)
IS NOT TR
UE))
InitPlan
-> Limit (cost=0.00..0.04 rows=1 width=28) (never executed)
-> Seq Scan on temp_table (cost=0.00..13.90 rows=390
width=28) (nev
er executed)
-> Limit (cost=0.00..0.04 rows=1 width=28) (actual
time=0.005..0.005 rows
=0 loops=1)
-> Seq Scan on temp_table (cost=0.00..13.90 rows=390
width=28) (act
ual time=0.001..0.001 rows=0 loops=1)
-> Limit (cost=0.00..0.04 rows=1 width=28) (actual
time=0.002..0.002 rows
=0 loops=1)
-> Seq Scan on temp_table (cost=0.00..13.90 rows=390
width=28) (act
ual time=0.000..0.000 rows=0 loops=1)
-> Seq Scan on temp_table (cost=0.00..13.90 rows=390 width=108)
(actual tim
e=0.000..0.000 rows=0 loops=1)
Total runtime: 0.424 ms
Result (cost=0.08..16.90 rows=390 width=108) (actual time=0.005..0.005
rows=0
loops=1)
One-Time Filter: ((split_part(($1)::text, '_'::text, 2))::smallint =
1)
InitPlan
-> Limit (cost=0.00..0.04 rows=1 width=28) (never executed)
-> Seq Scan on temp_table (cost=0.00..13.90 rows=390
width=28) (nev
er executed)
-> Limit (cost=0.00..0.04 rows=1 width=28) (actual
time=0.002..0.002 rows
=0 loops=1)
-> Seq Scan on temp_table (cost=0.00..13.90 rows=390
width=28) (act
ual time=0.001..0.001 rows=0 loops=1)
-> Seq Scan on temp_table (cost=0.00..13.90 rows=390 width=108)
(never exec
uted)
Total runtime: 0.267 ms
Result (cost=0.08..16.90 rows=390 width=108) (actual time=0.005..0.005
rows=0
loops=1)
One-Time Filter: ((split_part(($1)::text, '_'::text, 2))::smallint =
22)
InitPlan
-> Limit (cost=0.00..0.04 rows=1 width=28) (never executed)
-> Seq Scan on temp_table (cost=0.00..13.90 rows=390
width=28) (nev
er executed)
-> Limit (cost=0.00..0.04 rows=1 width=28) (actual
time=0.002..0.002 rows
=0 loops=1)
-> Seq Scan on temp_table (cost=0.00..13.90 rows=390
width=28) (act
ual time=0.001..0.001 rows=0 loops=1)
-> Seq Scan on temp_table (cost=0.00..13.90 rows=390 width=108)
(never exec
uted)
Total runtime: 0.189 ms
(31 Zeilen)
