Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1pOEOT-0006Js-JM for pgsql-hackers@arkaria.postgresql.org; Sat, 04 Feb 2023 08:59:33 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.92) (envelope-from ) id 1pOEOR-0004pc-2h for pgsql-hackers@arkaria.postgresql.org; Sat, 04 Feb 2023 08:59:31 +0000 Received: from makus.postgresql.org ([2001:4800:3e1:1::229]) by malur.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1pOEOQ-0004pT-Na for pgsql-hackers@lists.postgresql.org; Sat, 04 Feb 2023 08:59:30 +0000 Received: from mail-pf1-x442.google.com ([2607:f8b0:4864:20::442]) by makus.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.92) (envelope-from ) id 1pOEOL-0004by-92 for pgsql-hackers@lists.postgresql.org; Sat, 04 Feb 2023 08:59:29 +0000 Received: by mail-pf1-x442.google.com with SMTP id 203so5295493pfx.6 for ; Sat, 04 Feb 2023 00:59:24 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:message-id:mime-version:subject:to:from :date:from:to:cc:subject:date:message-id:reply-to; bh=arTMdOXxDKXVbt8jFzPbNA/wVzjhFxVjlBbNvXNpq9o=; b=iF6VEZf9xX7Jc3/Pf1ScRjRGI8Qiw/HTko7tl2BuFvsNS0oea6C3IbQouEXUcX8p0J IUSOXvPwe4dm9rgW7s1OdQ2ACqZRDYfvTsbzqzSQhoSIA6neRzLdFIIR9ukIOLDDQTV+ I0GpeGu/Z0QJsAuSqqOLBZ/5w73CoJFKaWY6K/0yGNfwMyE1R0hNGjvBI3FAEt48tCPC rqv16HkuajBzneV9lBJSVzTeihN1z3zoH/pmAkEM+4QJOCMr8nf42mxO2WWc8lqa7R/J gAuPlapc8kvL90MMoi4HUOSk/7UZuDFKAb7tYz2kiCY/b8eHfuBgrdH/I5aI6xIxYbv3 R2zQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:message-id:mime-version:subject:to:from :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=arTMdOXxDKXVbt8jFzPbNA/wVzjhFxVjlBbNvXNpq9o=; b=BAfZ2chXvN1trnrZ8gI4V1LNASUFkETVQy7A6ok6CXzwxkvydyhJmhT/FyIDRpzIJu raI8/CABQYcgh/iIDB+xV6JfTAj4lusDllSncySpE7p5AmTGnPcg7dshznyoFA/qEWFe X6zvPbv/2L6wOXSqol/HrNoEx5YIJYKCR91zKLZ7Ho6YVi/4gRAqKVo3knCfH/EEjbgJ 8UrrNRu/JqPmA7Ir+sTVEpjtv6XmZbgU2D0mLqe65zvIKtLVWaqpFZMMBV4kXjsa0iDF iGLJg0uwZnGSHleqqzQQHp/jLUOEtd+p8LaAkG8frSaNOtt0mtMWlxbP/sOayOnjm7re z/Kg== X-Gm-Message-State: AO0yUKXYxPij0QvLjO6S2w9S2l+MRTWSrmr1A6Xv/n75mARSKPbppz92 cb9bHqr4qovWpgZ+wBpYwmahVzPiZm/cr9YvE8U= X-Google-Smtp-Source: AK7set+Sx2HkCU+LFoK4UdFPUNyVsdFErQ6ACbtuBlbD7sBNo8KHP9J3vvRRd2al/ZlvStlvKVgvEA== X-Received: by 2002:aa7:8815:0:b0:592:6203:d920 with SMTP id c21-20020aa78815000000b005926203d920mr11258761pfo.0.1675501163821; Sat, 04 Feb 2023 00:59:23 -0800 (PST) Received: from DESKTOP-1P0239O ([2406:da14:e14:5800:45e4:ec37:eddb:7f3d]) by smtp.gmail.com with ESMTPSA id d17-20020aa78691000000b00592626fe48csm787805pfo.122.2023.02.04.00.59.22 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 04 Feb 2023 00:59:23 -0800 (PST) Date: Sat, 4 Feb 2023 16:59:24 +0800 From: "jacktby@gmail.com" To: pgsql-hackers Subject: How to implement read operations for my own access method? X-Priority: 3 X-GUID: 8C19CAF5-519B-415E-950C-650FD60161A0 X-Has-Attach: no X-Mailer: Foxmail 7.2.25.148[cn] Mime-Version: 1.0 Message-ID: <2023020416592307671913@gmail.com> Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: base64 List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk CkhpLEknbSB0cnlpbmcgdG8gaW1wbGVtZW50IG15IG93biBhY2Nlc3MgbWV0aG9kLiBCdXQgSSBm aW5kIHRoZSBmdW5jdGlvbnMgYmFvdXQgcmVhZCBpcyBkaWZmaWN1bHQuCkNhbiB5b3UgZ2l2ZSBt ZSBhbiBleGlzdGVkIGVhc3kgZXh0ZW5zaW9uIHRoYXQgaW1wZWxtZW50IHRoZSB0YWJsZWFtcm91 dGluZSB0byByZWZlcmVuY2U/IEkgaG9bZQppdCdzIG5vdCBjb21wbGljYXRlZCBsaWtlIGhlYXBf YW0sYW5kIGl0IHN1cHBvcnQgaW5zZXJ0IHNxbHMgYW5kIHNlbGVjdCBzcWxzLlRoYW5rcwoKLS0t LS0tLS0tLS0tLS0KCgoKamFja3RieUBnbWFpbC5jb20KCgo=