Estimate time without running the query

From: Neto pr <netoprbr9(at)gmail(dot)com>
To: PostgreSQL General <pgsql-general(at)postgresql(dot)org>
Subject: Estimate time without running the query
Date: 2018-09-13 21:38:18
Message-ID: CA+TZvYKvxW2UzjTA7D2B9n_cZYpEAC5OAL_A+XUFkH-5c9jwaQ@mail.gmail.com
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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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