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Fri, 08 May 2026 03:48:01 +0000 Content-Type: multipart/mixed; boundary="===============3016329334050589368==" MIME-Version: 1.0 From: Richard Guo To: pgsql-committers@lists.postgresql.org Subject: pgsql: Consider opfamily and collation when removing redundant GROUP BY X-Auto-Response-Suppress: All Auto-Submitted: auto-generated Message-Id: Date: Fri, 08 May 2026 03:48:01 +0000 List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk --===============3016329334050589368== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Q29uc2lkZXIgb3BmYW1pbHkgYW5kIGNvbGxhdGlvbiB3aGVuIHJlbW92aW5nIHJlZHVuZGFudCBH Uk9VUCBCWSBjb2x1bW5zCgpyZW1vdmVfdXNlbGVzc19ncm91cGJ5X2NvbHVtbnMoKSB1c2VzIGEg cmVsYXRpb24ncyB1bmlxdWUgaW5kZXhlcyB0bwpwcm92ZSB0aGF0IHNvbWUgR1JPVVAgQlkgY29s dW1ucyBhcmUgZnVuY3Rpb25hbGx5IGRlcGVuZGVudCBvbiBvdGhlcnMsCmFuZCBzbyBjYW4gYmUg ZHJvcHBlZCBmcm9tIHRoZSBHUk9VUCBCWSBjbGF1c2UuICBUaGUgbWF0Y2ggYmV0d2VlbgppbmRl eCBjb2x1bW5zIGFuZCBHUk9VUCBCWSBjb2x1bW5zIHdhcyBkb25lIGJ5IGF0dG5vIGFsb25lLCBp Z25vcmluZwp0d28gZXF1YWxpdHktcmVsYXRpb24gaXNzdWVzLgoKQSB0eXBlIG1heSBiZWxvbmcg dG8gbXVsdGlwbGUgYnRyZWUgb3BmYW1pbGllcyB3aG9zZSBub3Rpb25zIG9mCmVxdWFsaXR5IGRp ZmZlci4gIFRoZSByZWNvcmQgdHlwZSwgZm9yIGluc3RhbmNlLCBoYXMgcmVjb3JkX29wcwoocGVy LWZpZWxkIGVxdWFsaXR5KSBhbmQgcmVjb3JkX2ltYWdlX29wcyAoYnl0ZXdpc2UgZXF1YWxpdHkp LiAgQQp1bmlxdWUgaW5kZXggdW5kZXIgb25lIG9wZmFtaWx5IGRvZXMgbm90IHByb3ZlIHVuaXF1 ZW5lc3MgdW5kZXIgdGhlCmVxdWFsaXR5IHVzZWQgYnkgR1JPVVAgQlkgd2hlbiB0aGUgU29ydEdy b3VwQ2xhdXNlJ3MgZXFvcCBjb21lcyBmcm9tIGEKZGlmZmVyZW50IG9wZmFtaWx5LgoKTGlrZXdp c2UsIHNpbmNlIG5vbmRldGVybWluaXN0aWMgY29sbGF0aW9ucyB3ZXJlIGludHJvZHVjZWQgaW4g UEcgMTIsCnR3byBjb2xsYXRpb25zIG1heSBkaXNhZ3JlZSBvbiBlcXVhbGl0eSwgYW5kIGEgdW5p cXVlIGluZGV4IHVuZGVyIG9uZQpjb2xsYXRpb24gZG9lcyBub3QgcHJvdmUgdW5pcXVlbmVzcyB1 bmRlciBhbm90aGVyLgoKSW4gZWl0aGVyIGNhc2UsIHJvd3MgdGhhdCB0aGUgaW5kZXggY29uc2lk ZXJzIGRpc3RpbmN0IGNhbiBjb2xsYXBzZQppbnRvIGEgc2luZ2xlIEdST1VQIEJZIGdyb3VwLCB0 YWtpbmcgdW5ncm91cGVkIGNvbHVtbnMgb2YgZGlmZmVyaW5nCnZhbHVlcyB3aXRoIHRoZW0sIHNv IHRoZSBwbGFubmVyIGRyb3BzIGEgY29sdW1uIHRoYXQgaXMgbm90IGluIGZhY3QKZnVuY3Rpb25h bGx5IGRlcGVuZGVudCBhbmQgcHJvZHVjZXMgd3JvbmcgcmVzdWx0cy4KCkZpeCBieSByZXF1aXJp bmcsIGZvciBlYWNoIHVuaXF1ZS1pbmRleCBrZXkgY29sdW1uLCB0aGF0IHNvbWUgR1JPVVAgQlkK aXRlbSBvbiB0aGUgc2FtZSBjb2x1bW4gaGFzIGFuIGVxb3AgaW4gdGhlIGluZGV4J3Mgb3BmYW1p bHkgYW5kIGEKY29sbGF0aW9uIHRoYXQgYWdyZWVzIG9uIGVxdWFsaXR5IHdpdGggdGhlIGluZGV4 J3MgY29sbGF0aW9uLiAgVGhpcwptaXJyb3JzIHRoZSBjb21iaW5lZCBjaGVjayByZWxhdGlvbl9o YXNfdW5pcXVlX2luZGV4X2ZvcigpIGFwcGxpZXMgdG8Kam9pbiBjbGF1c2VzLgoKVGhpcyBpcyBh IHYxOCByZWdyZXNzaW9uOiBjb21taXQgYmQxMGVjNTI5IGV4dGVuZGVkCnJlbW92ZV91c2VsZXNz X2dyb3VwYnlfY29sdW1ucygpIGZyb20gcHJpbWFyeS1rZXkgY29uc3RyYWludHMgdG8KYXJiaXRy YXJ5IHVuaXF1ZSBpbmRleGVzLiAgQmVmb3JlIHRoYXQsIHRoZSBmdW5jdGlvbiBjb25zdWx0ZWQg b25seQpwcmltYXJ5IGtleXMsIHdob3NlIGVuZm9yY2VtZW50IGluZGV4IGlzIHJlcXVpcmVkIGJ5 IHBhcnNlX3V0aWxjbWQuYwp0byB1c2UgdGhlIGRlZmF1bHQgb3BjbGFzcyBhbmQgdGhlIGNvbHVt bidzIGRlY2xhcmVkIGNvbGxhdGlvbiwgc28KbmVpdGhlciBtaXNtYXRjaCBjb3VsZCBhcmlzZS4g IEJhY2stcGF0Y2ggdG8gdjE4IG9ubHkuCgpBdXRob3I6IFJpY2hhcmQgR3VvIDxndW9mZW5nbGlu dXhAZ21haWwuY29tPgpSZXZpZXdlZC1ieTogQXl1c2ggVGl3YXJpIDxheXVzaHRpd2FyaS5zbGcw MUBnbWFpbC5jb20+CkRpc2N1c3Npb246IGh0dHBzOi8vcG9zdGdyLmVzL20vQ0FNYldzNDl0NnVB cldvVFQtY0hZK25oc2kyM25KSktjRjlYYjljWUd6YVo5a05KOThnQG1haWwuZ21haWwuY29tCkJh Y2twYXRjaC10aHJvdWdoOiAxOAoKQnJhbmNoCi0tLS0tLQptYXN0ZXIKCkRldGFpbHMKLS0tLS0t LQpodHRwczovL2dpdC5wb3N0Z3Jlc3FsLm9yZy9wZy9jb21taXRkaWZmL2ExYjc1NDU1OGFlODdj ZWIxYTQ0YzM0ZGM1NDBmOTEyOGY2NDcyZWIKCk1vZGlmaWVkIEZpbGVzCi0tLS0tLS0tLS0tLS0t CnNyYy9iYWNrZW5kL29wdGltaXplci9wbGFuL2luaXRzcGxhbi5jICAgICAgICAgfCA2NyArKysr KysrKysrKysrKysrKysrKysrKy0tLQpzcmMvdGVzdC9yZWdyZXNzL2V4cGVjdGVkL2FnZ3JlZ2F0 ZXMub3V0ICAgICAgIHwgMzEgKysrKysrKysrKysrCnNyYy90ZXN0L3JlZ3Jlc3MvZXhwZWN0ZWQv Y29sbGF0ZS5pY3UudXRmOC5vdXQgfCAzMiArKysrKysrKysrKysKc3JjL3Rlc3QvcmVncmVzcy9z cWwvYWdncmVnYXRlcy5zcWwgICAgICAgICAgICB8IDE3ICsrKysrKysKc3JjL3Rlc3QvcmVncmVz cy9zcWwvY29sbGF0ZS5pY3UudXRmOC5zcWwgICAgICB8IDIwICsrKysrKysrCnNyYy90b29scy9w Z2luZGVudC90eXBlZGVmcy5saXN0ICAgICAgICAgICAgICAgfCAgMSArCjYgZmlsZXMgY2hhbmdl ZCwgMTYwIGluc2VydGlvbnMoKyksIDggZGVsZXRpb25zKC0pCgo= --===============3016329334050589368==--