From: Justin Pryzby <pryzby@telsasoft.com>
To: David G. Johnston <david.g.johnston@gmail.com>
Cc: pgsql-hackers@postgresql.org
Subject: Re: v13 planner ERROR: could not determine which collation to use for string comparison
Date: Tue, 21 Jul 2020 14:57:57 -0500
Message-ID: <20200721195757.GM5748@telsasoft.com> (raw)
In-Reply-To: <CAKFQuwazqA2snGEOs2uTV7-Mi5gHknNC1OC3ogx-9HHc8u7t2A@mail.gmail.com>
References: <20200721191606.GL5748@telsasoft.com>
<CAKFQuwazqA2snGEOs2uTV7-Mi5gHknNC1OC3ogx-9HHc8u7t2A@mail.gmail.com>
Reproducer:
postgres=# CREATE TABLE t AS SELECT ''a FROM generate_series(1,99); CREATE TABLE u AS SELECT ''a FROM generate_series(1,99) ; VACUUM ANALYZE t,u;
postgres=# explain SELECT * FROM t JOIN u ON t.a!=u.a;
ERROR: could not determine which collation to use for string comparison
HINT: Use the COLLATE clause to set the collation explicitly.
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To: pgsql-hackers@postgresql.org
Cc: pryzby@telsasoft.com, david.g.johnston@gmail.com
Subject: Re: v13 planner ERROR: could not determine which collation to use for string comparison
In-Reply-To: <20200721195757.GM5748@telsasoft.com>
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