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From: Ron Johnson <[email protected]>
To: Pgsql-admin <[email protected]>
Subject: "a REINDEX operation on an index pg_upgrade'd from a previous release could potentially fail."
Date: Sun, 15 Dec 2024 02:39:05 -0500
Message-ID: <CANzqJaCk3sN+i9fs=-e_GZtn-wM=+oZU1bb4rpt0KZb31uha=Q@mail.gmail.com> (raw)

According to https://www.postgresql.org/docs/release/12.0/
"
In new btree indexes, the maximum index entry length is reduced by eight
bytes, to improve handling of duplicate entries (Peter Geoghegan) §

This means that a REINDEX operation on an index pg_upgrade'd from a
previous release could potentially fail.
"

Would a REINDEX CONCURRENTLY mitigate that risk, since
https://www.postgresql.org/docs/14/sql-reindex.html#SQL-REINDEX-CONCURRENTLY
says "6. The old indexes are dropped"?

-- 
Death to <Redacted>, and butter sauce.
Don't boil me, I'm still alive.
<Redacted> lobster!

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