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Re: pg11: Query using index, but only for half the partitions

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Subject: Re: pg11: Query using index, but only for half the partitions
From: Andreas Kretschmer <andreas@xxxxxxxxxxxxxxx>
Date: Thu, 23 Apr 2020 12:01:28 +0200
In-reply-to: <CAP50yQ-oh31n95FvDOP4mcPc6n_cTTmRBHx0hyiXJ27oPzHjHA@mail.gmail.com>
References: <CAP50yQ-oh31n95FvDOP4mcPc6n_cTTmRBHx0hyiXJ27oPzHjHA@mail.gmail.com>
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Am 23.04.20 um 10:13 schrieb Stefan Knecht:

Seq Scan on snap_20200225 s (cost=0.00..1.19 rows=1 width=12)

the partition is very small, so it's cheaper to scan only the table (oneblock) than index + table (1 + 1 block).



Regards, Andreas

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