Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1wK4kK-000Ycd-2i for pgsql-committers@arkaria.postgresql.org; Tue, 05 May 2026 01:38:48 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.96) (envelope-from ) id 1wK4kJ-009c0L-2l for pgsql-committers@arkaria.postgresql.org; Tue, 05 May 2026 01:38:47 +0000 Received: from makus.postgresql.org ([2001:4800:3e1:1::229]) by malur.postgresql.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1wK4h7-009WsE-0x for pgsql-committers@lists.postgresql.org; Tue, 05 May 2026 01:35:29 +0000 Received: from mahout.postgresql.org ([2001:4800:3e1:1::227]) by makus.postgresql.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.98.2) (envelope-from ) id 1wK4h2-00000000EZR-2Dfq for pgsql-committers@lists.postgresql.org; Tue, 05 May 2026 01:35:28 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=postgresql.org; s=20171124; h=Date:Message-Id:Subject:To:From:MIME-Version: Content-Type:Sender:Reply-To:Cc:Content-Transfer-Encoding:Content-ID: Content-Description:In-Reply-To:References; bh=UJMMsMtMIR7TfKPbGwXlHWRST/crvn9RsqEjELWjzjE=; b=xMw6iN1OlJ+k/QCsrJ6l3g7fJG aohIQ9LiXnRBcg/9Gse9o9Jw9Ole0qKsEBy+3SOgAOQ1OnZc3tLS0UtZxoJMSoaUU5kqQc+tNuaEj 5TSDewcn4nXiVwKrWWwUyH98yZj0ganGejeBl0Na2MH057LqAoOVIgf9/hNkQrv0YRcijD2/Y1xhs E6dqs/bYb+GlW3MUdlPQnD3tVIyZqJ0RMPDwiMxwr2SsVVnhm3NRLenbKK+4l5NoGl9tC0opSJbrd YEYrKzi0Vn6RI8kQKUtri6ZePe0a6obm2rmhm/HJkgf+uF7bOlEi1H5sfS1Oty5iAIrxDfRlE4NnX yGiet+MA==; Received: from gemulon.postgresql.org ([2001:4800:3e1:1::198]) by mahout.postgresql.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1wK4h0-000fqB-2X for pgsql-committers@lists.postgresql.org; Tue, 05 May 2026 01:35:23 +0000 Received: from localhost ([127.0.0.1] helo=gemulon.postgresql.org) by gemulon.postgresql.org with esmtp (Exim 4.96) (envelope-from ) id 1wK4h0-000Ofh-19 for pgsql-committers@lists.postgresql.org; Tue, 05 May 2026 01:35:22 +0000 Content-Type: multipart/mixed; boundary="===============6422645095096698746==" MIME-Version: 1.0 From: Richard Guo To: pgsql-committers@lists.postgresql.org Subject: pgsql: Consider collation when proving subquery uniqueness X-Auto-Response-Suppress: All Auto-Submitted: auto-generated Message-Id: Date: Tue, 05 May 2026 01:35:22 +0000 List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk --===============6422645095096698746== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Q29uc2lkZXIgY29sbGF0aW9uIHdoZW4gcHJvdmluZyBzdWJxdWVyeSB1bmlxdWVuZXNzCgpyZWxf aXNfZGlzdGluY3RfZm9yKCkncyBSVEVfU1VCUVVFUlkgYnJhbmNoIHBhc3NlZCBvbmx5IHRoZSBl cXVhbGl0eQpvcGVyYXRvciBmcm9tIGVhY2ggam9pbiBjbGF1c2UgdG8gcXVlcnlfaXNfZGlzdGlu Y3RfZm9yKCksIGRpc2NhcmRpbmcKdGhlIG9wZXJhdG9yJ3MgaW5wdXQgY29sbGF0aW9uLiAgcXVl cnlfaXNfZGlzdGluY3RfZm9yKCkgdGhlbiB2ZXJpZmllZApvcGZhbWlseSBjb21wYXRpYmlsaXR5 IGJ1dCBuZXZlciBjaGVja2VkIGNvbGxhdGlvbnMsIHNvIGEgRElTVElOQ1QgLwpHUk9VUCBCWSAv IHNldC1vcCBvcGVyYXRpbmcgdW5kZXIgb25lIGNvbGxhdGlvbiB3YXMgdHJ1c3RlZCB0byBwcm92 ZQp1bmlxdWVuZXNzIGZvciBhIGNvbXBhcmlzb24gcGVyZm9ybWVkIHVuZGVyIGFuIHVucmVsYXRl ZCBjb2xsYXRpb24uCkFzIHdpdGggdGhlIHJlY2VudCBmaXggaW4gcmVsYXRpb25faGFzX3VuaXF1 ZV9pbmRleF9mb3IoKSwgdGhpcyBpcwp1bnNvdW5kIGZvciBub25kZXRlcm1pbmlzdGljIGNvbGxh dGlvbnMgYW5kIHlpZWxkcyB3cm9uZyBxdWVyeSByZXN1bHRzCmluIGFueSBvcHRpbWl6YXRpb24g dGhhdCBjb25zdW1lcyB0aGUgcHJvb2YuCgpGaXggYnkgY2FycnlpbmcgZWFjaCBjbGF1c2UncyBv cGVyYXRvciBpbnB1dCBjb2xsYXRpb24gaW50bwpxdWVyeV9pc19kaXN0aW5jdF9mb3IoKSBhbmQg dmFsaWRhdGluZyBpdCBhdCBldmVyeSBjaGVjay1zaXRlIGFnYWluc3QKdGhlIHN1YnF1ZXJ5IHRh cmdldCBleHByZXNzaW9uJ3MgY29sbGF0aW9uLgoKQmFjay1wYXRjaCB0byBhbGwgc3VwcG9ydGVk IGJyYW5jaGVzLiAgcXVlcnlfaXNfZGlzdGluY3RfZm9yKCkgaXMKZGVjbGFyZWQgaW4gYW4gaW5z dGFsbGVkIGhlYWRlciwgc28gb24gc3RhYmxlIGJyYW5jaGVzIHRoZSBleGlzdGluZwp0d28tbGlz dCBzaWduYXR1cmUgaXMgcmV0YWluZWQgYXMgYSB0aGluIHdyYXBwZXIgdGhhdCBmb3J3YXJkcyB0 byBhCm5ldyBjb2xsYXRpb24tYXdhcmUgZW50cnkgcG9pbnQ7IGV4dGVybmFsIGNhbGxlcnMgY29u dGludWUgdG8gcmVjZWl2ZQp0aGUgaGlzdG9yaWNhbCBjb2xsYXRpb24tYmxpbmQgYW5zd2VyLgoK QXV0aG9yOiBSaWNoYXJkIEd1byA8Z3VvZmVuZ2xpbnV4QGdtYWlsLmNvbT4KUmV2aWV3ZWQtYnk6 IFRvbSBMYW5lIDx0Z2xAc3NzLnBnaC5wYS51cz4KRGlzY3Vzc2lvbjogaHR0cHM6Ly9wb3N0Z3Iu ZXMvbS9DQU1iV3M0X1hVVVNUeXpDYVJqVWVlYWhXTnFpPThaT0E1UTRjb2k4elVWRURTQmtNNkFA bWFpbC5nbWFpbC5jb20KQmFja3BhdGNoLXRocm91Z2g6IDE0CgpCcmFuY2gKLS0tLS0tCm1hc3Rl cgoKRGV0YWlscwotLS0tLS0tCmh0dHBzOi8vZ2l0LnBvc3RncmVzcWwub3JnL3BnL2NvbW1pdGRp ZmYvNTc0NTgxYjUwYWM5YzYzZGQ5ZTRhYmViYjczMWEzYjY3ZTViNTBmNgoKTW9kaWZpZWQgRmls ZXMKLS0tLS0tLS0tLS0tLS0Kc3JjL2JhY2tlbmQvb3B0aW1pemVyL3BsYW4vYW5hbHl6ZWpvaW5z LmMgICAgICB8IDEyMSArKysrKysrKysrLS0tLS0tLQpzcmMvaW5jbHVkZS9ub2Rlcy9wYXRobm9k ZXMuaCAgICAgICAgICAgICAgICAgIHwgIDE0ICsrCnNyYy9pbmNsdWRlL29wdGltaXplci9wbGFu bWFpbi5oICAgICAgICAgICAgICAgfCAgIDIgKy0Kc3JjL3Rlc3QvcmVncmVzcy9leHBlY3RlZC9j b2xsYXRlLmljdS51dGY4Lm91dCB8IDE4MSArKysrKysrKysrKysrKysrKysrKysrKysrCnNyYy90 ZXN0L3JlZ3Jlc3Mvc3FsL2NvbGxhdGUuaWN1LnV0Zjguc3FsICAgICAgfCAgNTggKysrKysrKysK c3JjL3Rvb2xzL3BnaW5kZW50L3R5cGVkZWZzLmxpc3QgICAgICAgICAgICAgICB8ICAgMSArCjYg ZmlsZXMgY2hhbmdlZCwgMzI0IGluc2VydGlvbnMoKyksIDUzIGRlbGV0aW9ucygtKQoK --===============6422645095096698746==--