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 1tkgrx-005zqi-IC for pgsql-committers@arkaria.postgresql.org; Wed, 19 Feb 2025 09:59:53 +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 1tkgrw-006djl-3w for pgsql-committers@arkaria.postgresql.org; Wed, 19 Feb 2025 09:59:52 +0000 Received: from magus.postgresql.org ([2a02:c0:301:0:ffff::29]) by malur.postgresql.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1tkgrv-006djc-T2 for pgsql-committers@lists.postgresql.org; Wed, 19 Feb 2025 09:59:52 +0000 Received: from mahout.postgresql.org ([2001:4800:3e1:1::227]) by magus.postgresql.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1tkgrt-001jtr-2i for pgsql-committers@lists.postgresql.org; Wed, 19 Feb 2025 09:59:51 +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=5HNOtLOloPO0Y1/c2gsXmguljt4yEugT1mX+G5DjnzM=; b=pCwI1dO4d0E7p9jwjxgKNaegcy 65MjYeFmyYWQGYtBKNq+onULItQjMBT7NhrV4sJ+2baLXQRYprdg2xk4pfgyaD59dRS2v5ubWLAQJ oqehT4cHAFmQKgAV3qtbDQ1AmlJeP7Oaw/H6/uQquxt04WkaN3HF00d4v9QRyFZrMY69elg0c+ooN pGX88YZvQpuvcxxwa0BHN61mO0U+WsOHQDv6425ZfMZS19Ew5iCi+WnyPS0iX8/JtLgGWgpBC+EpX 1orXbEDJ1FYzYTJ6O4IynnxRlicvnCyafWpnJB8/+LGioH+Fm5PrdceMXfzYCXQ4/5D5e10/yqNc+ vQHRIy5A==; 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 4.94.2) (envelope-from ) id 1tkgrs-006AZw-DU for pgsql-committers@lists.postgresql.org; Wed, 19 Feb 2025 09:59:48 +0000 Received: from localhost ([127.0.0.1] helo=gemulon.postgresql.org) by gemulon.postgresql.org with esmtp (Exim 4.96) (envelope-from ) id 1tkgrt-0006xK-0o for pgsql-committers@lists.postgresql.org; Wed, 19 Feb 2025 09:59:48 +0000 Content-Type: multipart/mixed; boundary="===============5504611400862616996==" MIME-Version: 1.0 From: Alexander Korotkov To: pgsql-committers@lists.postgresql.org Subject: pgsql: Improve statistics estimation for single-column GROUP BY in sub- X-Auto-Response-Suppress: All Auto-Submitted: auto-generated Message-Id: Date: Wed, 19 Feb 2025 09:59:48 +0000 List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk --===============5504611400862616996== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 SW1wcm92ZSBzdGF0aXN0aWNzIGVzdGltYXRpb24gZm9yIHNpbmdsZS1jb2x1bW4gR1JPVVAgQlkg aW4gc3ViLXF1ZXJpZXMKClRoaXMgY29tbWl0IGZvbGxvd3MgdGhlIGlkZWEgb2YgdGhlIDQ3Njdi YzhmZjIuICBJZiBzdWItcXVlcnkgaGFzIG9ubHkgb25lCkdST1VQIEJZIGNvbHVtbiwgd2UgY2Fu IGNvbnNpZGVyIGl0cyBvdXRwdXQgdmFyaWFibGUgYXMgYmVpbmcgdW5pcXVlLiBXZSBjYW4KZW1w bG95IHRoaXMgZmFjdCBpbiB0aGUgc3RhdGlzdGljcyB0byBtYWtlIG1vcmUgcHJlY2lzZSBlc3Rp bWF0aW9ucyBpbiB0aGUKdXBwZXIgcXVlcnkgYmxvY2suCgpBdXRob3I6IEFuZHJlaSBMZXBpa2hv diA8bGVwaWhvdkBnbWFpbC5jb20+ClJldmlld2VkLWJ5OiBIZWlra2kgTGlubmFrYW5nYXMgPGhs aW5uYWthQGlraS5maT4KUmV2aWV3ZWQtYnk6IEFsZXhhbmRlciBLb3JvdGtvdiA8YWVrb3JvdGtv dkBnbWFpbC5jb20+CgpCcmFuY2gKLS0tLS0tCm1hc3RlcgoKRGV0YWlscwotLS0tLS0tCmh0dHBz Oi8vZ2l0LnBvc3RncmVzcWwub3JnL3BnL2NvbW1pdGRpZmYvZTk4M2VlOTM4MGZjYWM3NDZmOWI2 YjdjMzYwZDI1NWQ5ZmNkMDkwNwoKTW9kaWZpZWQgRmlsZXMKLS0tLS0tLS0tLS0tLS0Kc3JjL2Jh Y2tlbmQvdXRpbHMvYWR0L3NlbGZ1bmNzLmMgICAgICAgIHwgNTMgKysrKysrKysrKysrKysrKysr Ky0tLS0tLS0tLS0tLS0tCnNyYy9pbmNsdWRlL3V0aWxzL3NlbGZ1bmNzLmggICAgICAgICAgICB8 ICAzICstCnNyYy90ZXN0L3JlZ3Jlc3MvZXhwZWN0ZWQvc3RhdHNfZXh0Lm91dCB8IDE1ICsrKysr KysrKysKc3JjL3Rlc3QvcmVncmVzcy9zcWwvc3RhdHNfZXh0LnNxbCAgICAgIHwgMTIgKysrKysr KysKNCBmaWxlcyBjaGFuZ2VkLCA2MCBpbnNlcnRpb25zKCspLCAyMyBkZWxldGlvbnMoLSkKCg== --===============5504611400862616996==--