explain analyze would *run* the query and it can be dangerous if it is a DML 
statement like insert/update/delete 😊

If you still want to go with explain analyze,
You can do

begin;
explain analyze <my query>;
rollback;

thanks,
Vijay

From: Johnes Castro <[email protected]>
Date: Friday, September 14, 2018 at 3:12 AM
To: Neto pr <[email protected]>, PostgreSQL General 
<[email protected]>
Subject: [External] RE: Estimate time without running the query

Hi netoprbr,

Use a command explain analyse.

Best Regards.
Johnes Castro
________________________________
De: Neto pr <[email protected]>
Enviado: quinta-feira, 13 de setembro de 2018 19:38
Para: PostgreSQL General
Assunto: Estimate time without running the query

Dear all,
Only a doubt.
The Explain <query> command only estimates the cost of execution of a query, 
and does not estimate time for execution.
I would like know if exists  some way to estimate the time, without running the 
query?
Best Regards
[]`s Neto

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