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 4.94.2) (envelope-from ) id 1rV27G-00ESL9-Ox for pgsql-committers@arkaria.postgresql.org; Wed, 31 Jan 2024 04:22:27 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.94.2) (envelope-from ) id 1rV27F-00BBbq-Lq for pgsql-committers@arkaria.postgresql.org; Wed, 31 Jan 2024 04:22:25 +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 4.94.2) (envelope-from ) id 1rV27F-00BBbi-8T for pgsql-committers@lists.postgresql.org; Wed, 31 Jan 2024 04:22:25 +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 4.94.2) (envelope-from ) id 1rV27C-004GUc-9t for pgsql-committers@lists.postgresql.org; Wed, 31 Jan 2024 04:22:24 +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=HWR0LXIOofMYeJNwVBtStyzXYbKj+ri02CLUAZm0f28=; b=0xw+mF0SkJXXBhbLzb2idUsVZf KLmLZPIpijpbYIr4FeFFRyACTSNgRGw4kQDFSoOC6ngdQ23dqo/4Iebpny3uHyS+nk+ntiCaDQ6hU hN36sf+iUZIdEusoSJGC9tfvA4Q6q56uKbzU7nvedax3H8PTS7yG1hx64Ij5HOGnHMDIMVbRpXCC9 fb/GiF/DCYqaVzxjPI6S1jre//6o1dMiGwVJ/5LbFDPBYLr89aGOxHBpydEng5c+vB66v+zGfI/aw OPzl8upbUM5xxjYW8hgGlbfJKyw5Ev1ooBw/u54JmAMq57jik5YxbYWHb3uJi7n7tFbNiQbYG7+Qi 14ehhwlg==; Received: from gemulon.postgresql.org ([72.32.157.198]) by mahout.postgresql.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1rV27B-00Cqah-Lv for pgsql-committers@lists.postgresql.org; Wed, 31 Jan 2024 04:22:21 +0000 Received: from localhost ([127.0.0.1] helo=gemulon.postgresql.org) by gemulon.postgresql.org with esmtp (Exim 4.94.2) (envelope-from ) id 1rV27A-003wQt-Rr for pgsql-committers@lists.postgresql.org; Wed, 31 Jan 2024 04:22:20 +0000 Content-Type: multipart/mixed; boundary="===============3153233371830075550==" MIME-Version: 1.0 From: David Rowley To: pgsql-committers@lists.postgresql.org Subject: pgsql: Consider the "LIMIT 1" optimization with parallel DISTINCT X-Auto-Response-Suppress: All Auto-Submitted: auto-generated Message-Id: Date: Wed, 31 Jan 2024 04:22:20 +0000 List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk --===============3153233371830075550== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Q29uc2lkZXIgdGhlICJMSU1JVCAxIiBvcHRpbWl6YXRpb24gd2l0aCBwYXJhbGxlbCBESVNUSU5D VAoKU2ltaWxhciB0byB3aGF0IHdhcyBkb25lIGluIDU1NDM2NzdlYyBmb3Igbm9uLXBhcmFsbGVs IERJU1RJTkNULCBhcHBseQp0aGUgc2FtZSBvcHRpbWl6YXRpb24gd2hlbiB0aGUgZGlzdGluY3Rf cGF0aGtleXMgYXJlIGVtcHR5IGZvciB0aGUKcGFydGlhbCBwYXRocyB0b28uCgpUaGlzIGNhbiBi ZSBmYXN0ZXIgdGhhbiB0aGUgbm9uLXBhcmFsbGVsIHZlcnNpb24gd2hlbiB0aGUgZmlyc3Qgcm93 Cm1hdGNoaW5nIHRoZSBXSEVSRSBjbGF1c2Ugb2YgdGhlIHF1ZXJ5IHRha2VzIGEgd2hpbGUgdG8g ZmluZC4gIFBhcmFsbGVsCndvcmtlcnMgY291bGQgc3BlZWQgdGhhdCBwcm9jZXNzIHVwIGNvbnNp ZGVyYWJseS4KCkF1dGhvcjogUmljaGFyZCBHdW8KUmV2aWV3ZWQtYnk6IERhdmlkIFJvd2xleQpE aXNjdXNzaW9uOiBodHRwczovL3Bvc3Rnci5lcy9tL0NBTWJXczQ5SkMwcXZmVWJ6cy1UVnpnTXBT U0JpTUpfNnNOPUJhQTlpb2hCZ1lrcj1MQUBtYWlsLmdtYWlsLmNvbQoKQnJhbmNoCi0tLS0tLQpt YXN0ZXIKCkRldGFpbHMKLS0tLS0tLQpodHRwczovL2dpdC5wb3N0Z3Jlc3FsLm9yZy9wZy9jb21t aXRkaWZmL2I1ODhjYWQ2ODg4MjNiMWU5OTZjZTA1YWY0ZDg4YTk1NGMwMDVhM2EKCk1vZGlmaWVk IEZpbGVzCi0tLS0tLS0tLS0tLS0tCnNyYy9iYWNrZW5kL29wdGltaXplci9wbGFuL3BsYW5uZXIu YyAgICAgICAgICB8IDQ0ICsrKysrKysrKysrKysrKysrKysrKysrKy0tLQpzcmMvdGVzdC9yZWdy ZXNzL2V4cGVjdGVkL3NlbGVjdF9kaXN0aW5jdC5vdXQgfCAyMCArKysrKysrKysrKysKc3JjL3Rl c3QvcmVncmVzcy9zcWwvc2VsZWN0X2Rpc3RpbmN0LnNxbCAgICAgIHwgMTMgKysrKysrKysKMyBm aWxlcyBjaGFuZ2VkLCA3MiBpbnNlcnRpb25zKCspLCA1IGRlbGV0aW9ucygtKQoK --===============3153233371830075550==--