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Tue, 25 Aug 2026 01:24:03 +0000 Content-Type: multipart/mixed; boundary="===============4929469517762293081==" MIME-Version: 1.0 From: Richard Guo To: pgsql-committers@lists.postgresql.org Subject: pgsql: Don't assume DISTINCT ON implies uniqueness when the tlist has S X-Auto-Response-Suppress: All Auto-Submitted: auto-generated Message-Id: Date: Tue, 25 Aug 2026 01:24:03 +0000 List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk --===============4929469517762293081== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 RG9uJ3QgYXNzdW1lIERJU1RJTkNUIE9OIGltcGxpZXMgdW5pcXVlbmVzcyB3aGVuIHRoZSB0bGlz dCBoYXMgU1JGcwoKcXVlcnlfaXNfZGlzdGluY3RfZm9yKCkgdHJlYXRlZCBhIHN1YnF1ZXJ5J3Mg RElTVElOQ1QgT04gY2xhdXNlIGFzCnByb29mIHRoYXQgaXRzIG91dHB1dCBpcyB1bmlxdWUgb3Zl ciB0aGUgRElTVElOQ1QgT04gY29sdW1ucywgZXZlbiBpZgp0aGUgdGFyZ2V0bGlzdCBjb250YWlu cyBzZXQtcmV0dXJuaW5nIGZ1bmN0aW9ucy4gIFRoYXQncyBub3QgdHJ1ZToKd2hlbiB0aGUgcXVl cnkgaGFzIGFuIE9SREVSIEJZLCB0aGUgcGxhbm5lciBwb3N0cG9uZXMgZXZhbHVhdGlvbiBvZgpT UkZzIHRoYXQgYXJlIG5vdCBESVNUSU5DVCBPTiBvciBPUkRFUiBCWSBjb2x1bW5zIHVudGlsIGFm dGVyIHRoZQpVbmlxdWUgc3RlcCwgc28gdGhlIHN1YnF1ZXJ5IGNhbiBwcm9kdWNlIGR1cGxpY2F0 ZXMgb2YgdGhlIERJU1RJTkNUIE9OCmNvbHVtbnMuICBSZWx5aW5nIG9uIHRoaXMgYm9ndXMgdW5p cXVlbmVzcyBwcm9vZiBhbGxvd2VkIGpvaW4gcmVtb3ZhbAphbmQgdW5pcXVlLWlubmVyIGpvaW5z IHRvIHByb2R1Y2Ugd3JvbmcgcmVzdWx0cy4KClBsYWluIERJU1RJTkNUIGlzIG5vdCBhZmZlY3Rl ZCwgc2luY2UgYWxsIHRsaXN0IGNvbHVtbnMgYXJlIERJU1RJTkNUCmNvbHVtbnMgdGhlcmUsIGFu ZCBzbyBhbnkgU1JGcyBnZXQgZXhwYW5kZWQgYmVmb3JlIHRoZSBVbmlxdWUgc3RlcC4KClRvIGZp eCwgbWFrZSBxdWVyeV9zdXBwb3J0c19kaXN0aW5jdG5lc3MoKSBhbmQgcXVlcnlfaXNfZGlzdGlu Y3RfZm9yKCkKcmVmdXNlIHRvIHByb3ZlIGRpc3RpbmN0bmVzcyB2aWEgRElTVElOQ1QgT04gaWYg dGhlIHRhcmdldGxpc3QKY29udGFpbnMgYW55IFNSRnMuICBUaGlzIGlzIG1vcmUgY29uc2VydmF0 aXZlIHRoYW4gbmVjZXNzYXJ5LCBzaW5jZQp0aGUgU1JGcyBhcmUgb25seSBwb3N0cG9uZWQgd2hl biB0aGVyZSBpcyBhbiBPUkRFUiBCWSBhbmQgbm9uZSBvZiB0aGVtCmFwcGVhciBpbiBhIHNvcnQv Z3JvdXAgY29sdW1uLCBidXQgaXQgZG9lc24ndCBzZWVtIHdvcnRoIHRoZSB0cm91YmxlCnRvIGNo ZWNrIHRoYXQgcHJlY2lzZWx5LgoKQXV0aG9yOiBSaWNoYXJkIEd1byA8Z3VvZmVuZ2xpbnV4QGdt YWlsLmNvbT4KUmV2aWV3ZWQtYnk6IFRvbSBMYW5lIDx0Z2xAc3NzLnBnaC5wYS51cz4KRGlzY3Vz c2lvbjogaHR0cHM6Ly9wb3N0Z3IuZXMvbS9DQU1iV3M0LWhmZDFQeXlfekJlanNWVVN5LTNkeDE2 cnoyaGdVYWtrS25BZzNxZzJxPVFAbWFpbC5nbWFpbC5jb20KQmFja3BhdGNoLXRocm91Z2g6IDE0 CgpCcmFuY2gKLS0tLS0tClJFTF8xNF9TVEFCTEUKCkRldGFpbHMKLS0tLS0tLQpodHRwczovL2dp dC5wb3N0Z3Jlc3FsLm9yZy9wZy9jb21taXRkaWZmLzdlMjlmY2QxYWUwMDgzYTdmZDQ1ZjE0YWI3 YjlhZDNlYTBjOTdlOWMKCk1vZGlmaWVkIEZpbGVzCi0tLS0tLS0tLS0tLS0tCnNyYy9iYWNrZW5k L29wdGltaXplci9wbGFuL2FuYWx5emVqb2lucy5jIHwgMTYgKysrKysrKysrKy0tLS0tCnNyYy90 ZXN0L3JlZ3Jlc3MvZXhwZWN0ZWQvam9pbi5vdXQgICAgICAgIHwgMzMgKysrKysrKysrKysrKysr KysrKysrKysrKysrKysrKwpzcmMvdGVzdC9yZWdyZXNzL3NxbC9qb2luLnNxbCAgICAgICAgICAg ICB8IDEyICsrKysrKysrKysrCjMgZmlsZXMgY2hhbmdlZCwgNTYgaW5zZXJ0aW9ucygrKSwgNSBk ZWxldGlvbnMoLSkKCg== --===============4929469517762293081==--