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From: Bill Kim <[email protected]>
To: [email protected]
Subject: BUG #19524: NaN handling in btree_gist's float4/float8 opclasses
Date: Sun, 28 Jun 2026 11:14:35 +0900
Message-ID: <CAMQXxcgbtD2LXfX0tpgvOizxP-XxrCHV2ZDy4By_TZnJMsxXWQ@mail.gmail.com> (raw)

 Hi all,

  I have a patch for this and `make check` passes (core + all contrib, plus
  new btree_gist NaN cases covering the three scenarios in the report).
  Posting here first in case someone is already further along — if not,
  I'll send it to pgsql-hackers and register it in the open CF in a couple
  of days.

  The fix swaps the five gbt_float{4,8}{gt,ge,eq,le,lt} comparators and
  gbt_float{4,8}key_cmp for the NaN-aware float{4,8}_* helpers and
  float{4,8}_cmp_internal() from utils/float.h — same total order the
  btree opclass already uses. No on-disk change.

  Bill

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