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Copy command Faster than original select - Mailing list pgsql-performance

From belal
Subject Copy command Faster than original select
Date
Msg-id 1423211439320-5836886.post@n5.nabble.com
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Responses Re: Copy command Faster than original select  (Pavel Stehule <pavel.stehule@gmail.com>)
Re: Copy command Faster than original select  (Igor Neyman <ineyman@perceptron.com>)
Re: Copy command Faster than original select  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-performance
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I made complex select using PGAdmin III Query Editor, Postgre server 9.3


select ... from mytable join .. join ... order by ....

I get [Total query runtime: 8841 ms. 43602 rows retrieved.]

but when I use

copy ([same above select]) to '/x.txt'
I get [Query returned successfully: 43602 rows affected, 683 ms execution
time.]

these test made on the same machine as the postgresql server.


can anyone explain huge difference in executing time?

best regards all



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