Horton

Re: Building infrastructure for B-Tree deduplication that recognizes when opclass equality is also equivalence

Robert Haas <robertmhaas@gmail.com>

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From: Robert Haas <robertmhaas@gmail.com>
To: Peter Geoghegan <pg@bowt.ie>
Cc: Anastasia Lubennikova <a.lubennikova@postgrespro.ru>, Antonin Houska <ah@cybertec.at>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Date: 2020-01-02T17:37:13Z
Lists: pgsql-hackers 
On Thu, Jan 2, 2020 at 12:11 PM Peter Geoghegan <pg@bowt.ie> wrote:
> The difference between datum_image_eq() and datumIsEqual() is that
> only the former will consider two datums equal when they happen to
> have different TOAST input states -- we need that here.

Ah, OK. Sorry for the noise.

-- 
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

Commits

  1. Add equalimage B-Tree support functions.

  2. Make _bt_keep_natts_fast() use datum_image_eq().

  3. Teach datum_image_eq() about cstring datums.

  4. Fix optimization of foreign-key on update actions

  5. Support all SQL:2011 options for window frame clauses.

  6. Create a "sort support" interface API for faster sorting.