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f9a0392e1c
This can be used as a checksum for unordered sets. bit_and and bit_or already exist. Author: Alexey Bashtanov <bashtanov@imap.cc> Reviewed-by: Ibrar Ahmed <ibrar.ahmad@gmail.com> Discussion: https://www.postgresql.org/message-id/flat/9d4582ae-ecfc-3a13-2238-6ab5a37c1f41@imap.cc