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Tue, 10 Feb 2026 01:20:34 +0000 Content-Type: multipart/mixed; boundary="===============2327984980795914798==" MIME-Version: 1.0 From: Richard Guo To: pgsql-committers@lists.postgresql.org Subject: pgsql: Optimize IS DISTINCT FROM with non-nullable inputs X-Auto-Response-Suppress: All Auto-Submitted: auto-generated Message-Id: Date: Tue, 10 Feb 2026 01:20:34 +0000 List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk --===============2327984980795914798== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 T3B0aW1pemUgSVMgRElTVElOQ1QgRlJPTSB3aXRoIG5vbi1udWxsYWJsZSBpbnB1dHMKClRoZSBJ UyBESVNUSU5DVCBGUk9NIGNvbnN0cnVjdCBjb21wYXJlcyB2YWx1ZXMgYWN0aW5nIGFzIHRob3Vn aCBOVUxMCndlcmUgYSBub3JtYWwgZGF0YSB2YWx1ZSwgcmF0aGVyIHRoYW4gInVua25vd24iLiAg U2VtYW50aWNhbGx5LCAieCBJUwpESVNUSU5DVCBGUk9NIHkiIHlpZWxkcyB0cnVlIGlmIHRoZSB2 YWx1ZXMgZGlmZmVyIG9yIGlmIGV4YWN0bHkgb25lIGlzCk5VTEwsIGFuZCBmYWxzZSBpZiB0aGV5 IGFyZSBlcXVhbCBvciBib3RoIE5VTEwuICBVbmxpa2Ugb3JkaW5hcnkKY29tcGFyaXNvbiBvcGVy YXRvcnMsIGl0IG5ldmVyIHJldHVybnMgTlVMTC4KClByZXZpb3VzbHksIHRoZSBwbGFubmVyIG9u bHkgc2ltcGxpZmllZCB0aGlzIGNvbnN0cnVjdCBpZiBhbGwgaW5wdXRzCndlcmUgY29uc3RhbnRz LCBmb2xkaW5nIGl0IHRvIGEgY29uc3RhbnQgYm9vbGVhbiByZXN1bHQuICBUaGlzIHBhdGNoCmV4 dGVuZHMgdGhlIG9wdGltaXphdGlvbiB0byBjYXNlcyB3aGVyZSBpbnB1dHMgYXJlIG5vbi1jb25z dGFudCBidXQKcHJvdmVuIHRvIGJlIG5vbi1udWxsYWJsZS4gIFNwZWNpZmljYWxseSwgInggSVMg RElTVElOQ1QgRlJPTSBOVUxMIgpmb2xkcyB0byBjb25zdGFudCBUUlVFIGlmICJ4IiBpcyBrbm93 biB0byBiZSBub24tbnVsbGFibGUuICBGb3IgY2FzZXMKd2hlcmUgYm90aCBpbnB1dHMgYXJlIGd1 YXJhbnRlZWQgbm90IHRvIGJlIE5VTEwsIHRoZSBleHByZXNzaW9uCmJlY29tZXMgc2VtYW50aWNh bGx5IGVxdWl2YWxlbnQgdG8gInggPD4geSIsIGFuZCB0aGUgRGlzdGluY3RFeHByIGlzCmNvbnZl cnRlZCBpbnRvIGFuIGluZXF1YWxpdHkgT3BFeHByLgoKVGhpcyB0cmFuc2Zvcm1hdGlvbiBwcm92 aWRlcyBzZXZlcmFsIGJlbmVmaXRzLiAgSXQgY29udmVydHMgdGhlCmNvbXBhcmlzb24gaW50byBh IHN0YW5kYXJkIG9wZXJhdG9yLCBhbGxvd2luZyB0aGUgdXNlIG9mIHBhcnRpYWwKaW5kZXhlcyBh bmQgY29uc3RyYWludCBleGNsdXNpb24uICBGdXJ0aGVybW9yZSwgaWYgdGhlIGNsYXVzZSBpcwpu ZWdhdGVkIChpLmUuLCAiSVMgTk9UIERJU1RJTkNUIEZST00iKSwgaXQgc2ltcGxpZmllcyB0byBh biBlcXVhbGl0eQpvcGVyYXRvci4gIFRoaXMgZW5hYmxlcyB0aGUgcGxhbm5lciB0byBnZW5lcmF0 ZSBiZXR0ZXIgcGxhbnMgdXNpbmcKaW5kZXggc2NhbnMsIG1lcmdlIGpvaW5zLCBoYXNoIGpvaW5z LCBhbmQgRUMtYmFzZWQgcXVhbCBkZWR1Y3Rpb24uCgpBdXRob3I6IFJpY2hhcmQgR3VvIDxndW9m ZW5nbGludXhAZ21haWwuY29tPgpSZXZpZXdlZC1ieTogVGVuZGVyIFdhbmcgPHRuZHJ3YW5nQGdt YWlsLmNvbT4KRGlzY3Vzc2lvbjogaHR0cHM6Ly9wb3N0Z3IuZXMvbS9DQU1iV3M0OUJNQU9Xdmtk U0h4cFVEbm5pcUpjRWNHcTNfOGRkXzV3VFI0eHJRWTh1ckFAbWFpbC5nbWFpbC5jb20KCkJyYW5j aAotLS0tLS0KbWFzdGVyCgpEZXRhaWxzCi0tLS0tLS0KaHR0cHM6Ly9naXQucG9zdGdyZXNxbC5v cmcvcGcvY29tbWl0ZGlmZi8wYTM3OTYxMjU0MGNjNTFlNTRkYzFjMGNjNGI5ZWY4Nzk3ZDI1MzNj CgpNb2RpZmllZCBGaWxlcwotLS0tLS0tLS0tLS0tLQpjb250cmliL3Bvc3RncmVzX2Zkdy9leHBl Y3RlZC9wb3N0Z3Jlc19mZHcub3V0IHwgICA4ICstCmNvbnRyaWIvcG9zdGdyZXNfZmR3L3NxbC9w b3N0Z3Jlc19mZHcuc3FsICAgICAgfCAgIDIgKy0Kc3JjL2JhY2tlbmQvb3B0aW1pemVyL3V0aWwv Y2xhdXNlcy5jICAgICAgICAgICB8ICA2MCArKysrKysrKysrLQpzcmMvdGVzdC9yZWdyZXNzL2V4 cGVjdGVkL3ByZWRpY2F0ZS5vdXQgICAgICAgIHwgMTM2ICsrKysrKysrKysrKysrKysrKysrKysr KysKc3JjL3Rlc3QvcmVncmVzcy9zcWwvcHJlZGljYXRlLnNxbCAgICAgICAgICAgICB8ICA2MSAr KysrKysrKysrKwo1IGZpbGVzIGNoYW5nZWQsIDI2MCBpbnNlcnRpb25zKCspLCA3IGRlbGV0aW9u cygtKQoK --===============2327984980795914798==--