{"id":2376,"date":"2025-02-14T10:36:19","date_gmt":"2025-02-14T02:36:19","guid":{"rendered":"https:\/\/cowmanchiang.me\/wp\/?p=2376"},"modified":"2025-02-14T10:36:19","modified_gmt":"2025-02-14T02:36:19","slug":"rocksdb-reverse-search","status":"publish","type":"post","link":"https:\/\/cowmanchiang.me\/wp\/?p=2376","title":{"rendered":"[RocksDB] Reverse search"},"content":{"rendered":"<p>To get a reverse order list, assume prefix is \u200b\u200bset and startRow is not specified.<br \/>\nWe need to add the startRow to the maximum value of the character for positioning<\/p>\n<pre>\r\nif (startRow != null) {\r\n    scanObj.setStartRow(startRow);\r\n} else if (request.isReverse()) {\r\n    scanObj.setStartRow(request.getActivityId() + Constants.DIVIDER + Character.MAX_VALUE);\r\n}\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>To get a reverse order list, assume prefix is \u200b\u200bset and startRow is not specified. We need to add the startRow to the maximum value of the character for positioning if (startRow != null) { scanObj.setStartRow(startRow); } else if (request.isReverse()) &hellip; <a href=\"https:\/\/cowmanchiang.me\/wp\/?p=2376\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[51,105],"tags":[],"class_list":["post-2376","post","type-post","status-publish","format-standard","hentry","category-java","category-rocksdb"],"_links":{"self":[{"href":"https:\/\/cowmanchiang.me\/wp\/index.php?rest_route=\/wp\/v2\/posts\/2376","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cowmanchiang.me\/wp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cowmanchiang.me\/wp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cowmanchiang.me\/wp\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cowmanchiang.me\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2376"}],"version-history":[{"count":4,"href":"https:\/\/cowmanchiang.me\/wp\/index.php?rest_route=\/wp\/v2\/posts\/2376\/revisions"}],"predecessor-version":[{"id":2380,"href":"https:\/\/cowmanchiang.me\/wp\/index.php?rest_route=\/wp\/v2\/posts\/2376\/revisions\/2380"}],"wp:attachment":[{"href":"https:\/\/cowmanchiang.me\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2376"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cowmanchiang.me\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2376"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cowmanchiang.me\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2376"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}