From: Alexey Bashtanov <bashtanov@imap.cc>
To: Tom Lane <tgl@sss.pgh.pa.us>
To: pgsql-hackers@lists.postgresql.org
Subject: Re: Less-silly selectivity for JSONB matching operators
Date: Tue, 31 Mar 2020 17:08:26 +0100
Message-ID: <a692a4d7-cc08-fe6a-dac0-625e292bf64d@imap.cc> (raw)
In-Reply-To: <14469.1582927774@sss.pgh.pa.us>
References: <12237.1582833074@sss.pgh.pa.us>
<14469.1582927774@sss.pgh.pa.us>
Quickly tested like this:
create table t(a jsonb);
insert into t select jsonb_object( array[(random() * 10)::int::text],
'{" "}') from generate_series(1, 100000);
insert into t select jsonb_object( array[(random() * 10)::int::text],
array[(random() * 1000)::int::text]) from generate_series(1, 100000);
explain analyze select * from t where a ? '1';
analyze t;
explain analyze select * from t where a ? '1';
Best, Alex
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To: pgsql-hackers@postgresql.org
Cc: bashtanov@imap.cc, tgl@sss.pgh.pa.us, pgsql-hackers@lists.postgresql.org
Subject: Re: Less-silly selectivity for JSONB matching operators
In-Reply-To: <a692a4d7-cc08-fe6a-dac0-625e292bf64d@imap.cc>
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