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 1v5z9p-00F2Ff-EQ for pgsql-committers@arkaria.postgresql.org; Tue, 07 Oct 2025 04:18:37 +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 1v5z9m-00DCPn-VE for pgsql-committers@arkaria.postgresql.org; Tue, 07 Oct 2025 04:18:35 +0000 Received: from makus.postgresql.org ([2001:4800:3e1:1::229]) by malur.postgresql.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1v5z9m-00DCPN-Ja for pgsql-committers@lists.postgresql.org; Tue, 07 Oct 2025 04:18:35 +0000 Received: from mahout.postgresql.org ([2001:4800:3e1:1::227]) by makus.postgresql.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1v5z9k-000QdO-1l for pgsql-committers@lists.postgresql.org; Tue, 07 Oct 2025 04:18:34 +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=SNMohgNCyt8fxlVtuWrc8l7iGDB2ziKn3x45DIfmD9k=; b=eoO+ZIXaWmv4b8R1o5VfeegrhH jYVh6IBdFCVr8c2hs8XvMSM1IjafrZBXG+wDlmc0tJFx9M77Sk/KCMqstezpS8UsHBLZOF+yGCzHH 8Tbe7lUO+n/RuXCW6zgDDs5w65I+wHTFFYflXlshmxp7FnoNPDMEeNV57fQiyJWGzC6Ht12ZkzLQZ fVw5sGzc6q+HY4Qcnyqisj3ZtH9IUUv+FEExPujMJ9OCA8Rh6OsEjEM9EvL2xpppK0PUc9bjk9ja5 ISlur6fFooueOD0IrWAiicxsOhRxWCPSlMFtozxxRaVa1cZPP/iPpjlbnRZlzKICZALXKZDtzYMvL IwOz1HHw==; 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 1v5z9l-001GCj-43 for pgsql-committers@lists.postgresql.org; Tue, 07 Oct 2025 04:18:33 +0000 Received: from localhost ([127.0.0.1] helo=gemulon.postgresql.org) by gemulon.postgresql.org with esmtp (Exim 4.96) (envelope-from ) id 1v5z9k-000Rb4-2w for pgsql-committers@lists.postgresql.org; Tue, 07 Oct 2025 04:18:32 +0000 Content-Type: multipart/mixed; boundary="===============0588771098812424867==" MIME-Version: 1.0 From: David Rowley To: pgsql-committers@lists.postgresql.org Subject: pgsql: Teach planner to short-circuit EXCEPT/INTERSECT with dummy input X-Auto-Response-Suppress: All Auto-Submitted: auto-generated Message-Id: Date: Tue, 07 Oct 2025 04:18:32 +0000 List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk --===============0588771098812424867== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 VGVhY2ggcGxhbm5lciB0byBzaG9ydC1jaXJjdWl0IEVYQ0VQVC9JTlRFUlNFQ1Qgd2l0aCBkdW1t eSBpbnB1dHMKCldoZW4gZWl0aGVyIGlucHV0cyBvZiBhbiBJTlRFUlNFQ1QgW0FMTF0gb3BlcmF0 b3IgYXJlIHByb3ZlbiBub3QgdG8gcmV0dXJuCmFueSByZXN1bHRzIChhIGR1bW15IHJlbCksIHRo ZW4gbWFyayB0aGUgZW50aXJlIElOVEVSU0VDVCBvcGVyYXRpb24gYXMKZHVtbXkuCgpMaWtld2lz ZSwgaWYgYW4gRVhDRVBUIFtBTExdIG9wZXJhdGlvbidzIGxlZnQgaW5wdXQgaXMgcHJvdmVuIGVt cHR5LCB0aGVuCm1hcmsgdGhlIGVudGlyZSBvcGVyYXRpb24gYXMgZHVtbXkuCgpXaXRoIEVYQ0VQ VCBBTEwsIHdlIGNhbiBlYXNpbHkgaGFuZGxlIHRoZSByaWdodCBpbnB1dCBiZWluZyBkdW1teSBh cwp3ZSBjYW4gcmV0dXJuIHRoZSBsZWZ0IGlucHV0IHdpdGhvdXQgYW55IHByb2Nlc3NpbmcuICBU aGF0IGNhbiBsZWFkIHRvCnNpZ25pZmljYW50IHBlcmZvcm1hbmNlIGdhaW5zIGR1cmluZyBxdWVy eSBleGVjdXRpb24uICBXZSBjYW4ndCBlYXNpbHkKaGFuZGxlIGR1bW15IHJpZ2h0IGlucHV0cyBm b3IgRVhDRVBUICh3aXRob3V0IEFMTCksIGFzIHRoYXQgd291bGQgcmVxdWlyZQpkZWR1cGxpY2F0 aW9uIG9mIHRoZSBsZWZ0IGlucHV0LiAgV2lyaW5nIHVwIHRob3NlIFBhdGhzIGlzIGxpa2VseSBt b3JlCmNvbXBsZXggdGhhbiBpdCdzIHdvcnRoIGFzIHRoZSBnYWlucyBkdXJpbmcgZXhlY3V0aW9u IGFyZW4ndCB0aGF0IGdyZWF0LApzbyBsZXQncyBsZWF2ZSB0aGF0IG9uZSB0byBiZSBoYW5kbGVk IGJ5IHRoZSBub3JtYWwgUGF0aCBnZW5lcmF0aW9uIGNvZGUuCgpBdXRob3I6IERhdmlkIFJvd2xl eSA8ZGdyb3dsZXltbEBnbWFpbC5jb20+ClJldmlld2VkLWJ5OiBUb20gTGFuZSA8dGdsQHNzcy5w Z2gucGEudXM+CkRpc2N1c3Npb246IGh0dHBzOi8vcG9zdGdyLmVzL20vQ0FBcEhEdnJpNTNQUEY3 NmMzTTk0X1FOV2JKZlhqeUNualh1al8yPUxZTS0wbThXWnR3QG1haWwuZ21haWwuY29tCgpCcmFu Y2gKLS0tLS0tCm1hc3RlcgoKRGV0YWlscwotLS0tLS0tCmh0dHBzOi8vZ2l0LnBvc3RncmVzcWwu b3JnL3BnL2NvbW1pdGRpZmYvOWM5ZDQxYWY0ZGI3ZTdmODFkMGY5YWJjN2RjMTY0MDIzODYwOTFi MAoKTW9kaWZpZWQgRmlsZXMKLS0tLS0tLS0tLS0tLS0Kc3JjL2JhY2tlbmQvb3B0aW1pemVyL3By ZXAvcHJlcHVuaW9uLmMgfCA2MyArKysrKysrKysrKysrKysrKysrKysrKysrCnNyYy90ZXN0L3Jl Z3Jlc3MvZXhwZWN0ZWQvdW5pb24ub3V0ICAgIHwgODYgKysrKysrKysrKysrKysrKysrKysrKysr KysrKysrKysrLQpzcmMvdGVzdC9yZWdyZXNzL3NxbC91bmlvbi5zcWwgICAgICAgICB8IDM4ICsr KysrKysrKysrKysrLQozIGZpbGVzIGNoYW5nZWQsIDE4NSBpbnNlcnRpb25zKCspLCAyIGRlbGV0 aW9ucygtKQoK --===============0588771098812424867==--