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Sun, 21 Jan 2024 20:21:53 +0000 Content-Type: multipart/mixed; boundary="===============4483183767447342506==" MIME-Version: 1.0 From: Alexander Korotkov To: pgsql-committers@lists.postgresql.org Subject: pgsql: Explore alternative orderings of group-by pathkeys during optimi X-Auto-Response-Suppress: All Auto-Submitted: auto-generated Message-Id: Date: Sun, 21 Jan 2024 20:21:53 +0000 List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk --===============4483183767447342506== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 RXhwbG9yZSBhbHRlcm5hdGl2ZSBvcmRlcmluZ3Mgb2YgZ3JvdXAtYnkgcGF0aGtleXMgZHVyaW5n IG9wdGltaXphdGlvbi4KCldoZW4gZXZhbHVhdGluZyBhIHF1ZXJ5IHdpdGggYSBtdWx0aS1jb2x1 bW4gR1JPVVAgQlkgY2xhdXNlLCB3ZSBjYW4gbWluaW1pemUKc29ydCBvcGVyYXRpb25zIG9yIGF2 b2lkIHRoZW0gaWYgd2Ugc3luY2hyb25pemUgdGhlIG9yZGVyIG9mIEdST1VQIEJZIGNsYXVzZXMK d2l0aCB0aGUgT1JERVIgQlkgc29ydCBjbGF1c2Ugb3Igc29ydCBvcmRlciwgd2hpY2ggY29tZXMg ZnJvbSB0aGUgdW5kZXJseWluZwpxdWVyeSB0cmVlLiBHcm91cGluZyBkb2VzIG5vdCBpbXBseSBh bnkgb3JkZXJpbmcsIHNvIHdlIGNhbiBjb21wYXJlCnRoZSBrZXlzIGluIGFyYml0cmFyeSBvcmRl ciwgYW5kIGEgSGFzaCBBZ2cgbGV2ZXJhZ2VzIHRoaXMuIEJ1dCBmb3IgR3JvdXAgQWdnLAp3ZSBz aW1wbHkgY29tcGFyZWQga2V5cyBpbiB0aGUgb3JkZXIgc3BlY2lmaWVkIGluIHRoZSBxdWVyeS4g VGhpcyBjb21taXQKZXhwbG9yZXMgYWx0ZXJuYXRpdmUgb3JkZXJpbmcgb2YgdGhlIGtleXMsIHRy eWluZyB0byBmaW5kIGEgY2hlYXBlciBvbmUuCgpUaGUgb3JkZXJpbmcgb2YgZ3JvdXAga2V5cyBt YXkgaW50ZXJhY3Qgd2l0aCBvdGhlciBwYXJ0cyBvZiB0aGUgcXVlcnksIHNvbWUgb2YKd2hpY2gg bWF5IG5vdCBiZSBrbm93biB3aGlsZSBwbGFubmluZyB0aGUgZ3JvdXBpbmcuIEZvciBleGFtcGxl LCB0aGVyZSBtYXkgYmUKYW4gZXhwbGljaXQgT1JERVIgQlkgY2xhdXNlIG9yIHNvbWUgb3RoZXIg b3JkZXJpbmctZGVwZW5kZW50IG9wZXJhdGlvbiBoaWdoZXIgdXAKaW4gdGhlIHF1ZXJ5LCBhbmQg dXNpbmcgdGhlIHNhbWUgb3JkZXJpbmcgbWF5IGFsbG93IHVzaW5nIGVpdGhlciBpbmNyZW1lbnRh bApzb3J0IG9yIGV2ZW4gZWxpbWluYXRpbmcgdGhlIHNvcnQgZW50aXJlbHkuCgpUaGUgcGF0Y2gg YWx3YXlzIGtlZXBzIHRoZSBvcmRlcmluZyBzcGVjaWZpZWQgaW4gdGhlIHF1ZXJ5LCBhc3N1bWlu ZyB0aGUgdXNlcgptaWdodCBoYXZlIGFkZGl0aW9uYWwgaW5zaWdodHMuCgpUaGlzIGludHJvZHVj ZXMgYSBuZXcgR1VDIGVuYWJsZV9ncm91cF9ieV9yZW9yZGVyaW5nIHNvIHRoYXQgdGhlIG9wdGlt aXphdGlvbgptYXkgYmUgZGlzYWJsZWQgaWYgbmVlZGVkLgoKRGlzY3Vzc2lvbjogaHR0cHM6Ly9w b3N0Z3IuZXMvbS83Yzc5ZTZhNS04NTk3LTc0ZTgtMDY3MS0xYzM5ZDEyNGM5ZDYlNDBzaWdhZXYu cnUKQXV0aG9yOiBBbmRyZWkgTGVwaWtob3YsIFRlb2RvciBTaWdhZXYKUmV2aWV3ZWQtYnk6IFRv bWFzIFZvbmRyYSwgQ2xhdWRpbyBGcmVpcmUsIEdhdmluIEZsb3dlciwgRG1pdHJ5IERvbGdvdgpS ZXZpZXdlZC1ieTogUm9iZXJ0IEhhYXMsIFBhdmVsIEJvcmlzb3YsIERhdmlkIFJvd2xleSwgWmhp aG9uZyBZdQpSZXZpZXdlZC1ieTogVG9tIExhbmUsIEFsZXhhbmRlciBLb3JvdGtvdiwgUmljaGFy ZCBHdW8sIEFsZW5hIFJ5YmFraW5hCgpCcmFuY2gKLS0tLS0tCm1hc3RlcgoKRGV0YWlscwotLS0t LS0tCmh0dHBzOi8vZ2l0LnBvc3RncmVzcWwub3JnL3BnL2NvbW1pdGRpZmYvMDQ1MmI0NjFiYzQw NWU2ZDM1ZDhhMTRjMDI4MTNjMTVlMjhhZTUxNgoKTW9kaWZpZWQgRmlsZXMKLS0tLS0tLS0tLS0t LS0Kc3JjL2JhY2tlbmQvb3B0aW1pemVyL3BhdGgvZXF1aXZjbGFzcy5jICAgICAgIHwgIDEzICst CnNyYy9iYWNrZW5kL29wdGltaXplci9wYXRoL3BhdGhrZXlzLmMgICAgICAgICB8IDI1MiArKysr KysrKysrKysrKysKc3JjL2JhY2tlbmQvb3B0aW1pemVyL3BsYW4vcGxhbm5lci5jICAgICAgICAg IHwgNDI0ICsrKysrKysrKysrKy0tLS0tLS0tLS0tLS0tCnNyYy9iYWNrZW5kL3V0aWxzL21pc2Mv Z3VjX3RhYmxlcy5jICAgICAgICAgICB8ICAxMCArCnNyYy9iYWNrZW5kL3V0aWxzL21pc2MvcG9z dGdyZXNxbC5jb25mLnNhbXBsZSB8ICAgMSArCnNyYy9pbmNsdWRlL25vZGVzL3BhdGhub2Rlcy5o ICAgICAgICAgICAgICAgICB8ICAxMCArCnNyYy9pbmNsdWRlL29wdGltaXplci9wYXRocy5oICAg ICAgICAgICAgICAgICB8ICAgMiArCnNyYy90ZXN0L3JlZ3Jlc3MvZXhwZWN0ZWQvYWdncmVnYXRl cy5vdXQgICAgICB8IDIwMiArKysrKysrKysrKysKc3JjL3Rlc3QvcmVncmVzcy9leHBlY3RlZC9z eXN2aWV3cy5vdXQgICAgICAgIHwgICAzICstCnNyYy90ZXN0L3JlZ3Jlc3Mvc3FsL2FnZ3JlZ2F0 ZXMuc3FsICAgICAgICAgICB8ICA3NSArKysrKwpzcmMvdG9vbHMvcGdpbmRlbnQvdHlwZWRlZnMu bGlzdCAgICAgICAgICAgICAgfCAgIDEgKwoxMSBmaWxlcyBjaGFuZ2VkLCA3NzAgaW5zZXJ0aW9u cygrKSwgMjIzIGRlbGV0aW9ucygtKQoK --===============4483183767447342506==--