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help / color / mirror / Atom feedFrom: Marcos Pegoraro <[email protected]>
To: pgsql-hackers <[email protected]>
Subject: V18 change on EXPLAIN ANALYZE
Date: Fri, 26 Sep 2025 17:33:26 -0300
Message-ID: <CAB-JLwYCgdiB=trauAV1HN5rAWQdvDGgaaY_mqziN88pBTvqqg@mail.gmail.com> (raw)
Robert Hass committed ddb17e387aa28d61521227377b00f997756b8a27,
which changed how EXPLAIN indicates fractional rows. That's cool but I have
to see that change on sources because it's not explained on DOCs.
One can understand that cost=4.36, that actual time=0.009, but what means
rows=10.43 ? Costs and Time having decimals are fine but what is a row and
a half ?
So, I don't know exactly how to explain this change but I think it would be
good to have a new paragraph on [1] and explain that now when nloops > 1,
we now display two digits after the decimal point, rather than none.
[1] -
https://www.postgresql.org/docs/current/using-explain.html#USING-EXPLAIN-ANALYZE
regards
Marcos
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