agid])) { foreach ($g_flag_thread[$flagid] as &$val) { flag_thread_filter($val); } flag_thread_set($flagid, $g_flag_thread[$flagid]); } } return $g_flag_thread[$flagid]; } // 设置缓存 $key = flagid / $val = flagid下tid数组 function flag_thread_set($key, $val) { global $g_flag_thread; FALSE === $g_flag_thread and $g_flag_thread = website_get('flag_thread'); empty($g_flag_thread) and $g_flag_thread = array(); $g_flag_thread[$key] = $val; return website_set('flag_thread', $g_flag_thread); } // 删除flag下tid缓存 function flag_thread_delete_cache($flagid) { global $g_flag_thread; FALSE === $g_flag_thread and $g_flag_thread = website_get('flag_thread'); empty($g_flag_thread) and $g_flag_thread = array(); if (isset($g_flag_thread[$flagid])) { unset($g_flag_thread[$flagid]); website_set('flag_thread', $g_flag_thread); } return TRUE; } // Delete by tid / 通过tid删除flag下的主题和对应flagid缓存 function flag_thread_delete_by_tid($tid) { global $g_flag_thread; FALSE === $g_flag_thread and $g_flag_thread = website_get('flag_thread'); if (empty($g_flag_thread)) { $g_flag_thread = array(); } else { $thread = well_thread_read_cache($tid); $arrlist = flag_thread_find($tid, 1, $thread['flags']); $flagarr = $ids = array(); foreach ($arrlist as $val) { $flagarr[] = $val['flagid']; $ids[] = $val['id']; if (isset($g_flag_thread[$val['flagid']])) unset($g_flag_thread[$val['flagid']]); } website_set('flag_thread', $g_flag_thread); // 主键更新 flag_update($flagarr, array('count-' => 1)); // 主键删除 flag_thread_delete($ids); } return TRUE; } // 主键删除通过$flagid删除flag下的主题和对应flagid缓存 function flag_thread_delete_by_flagid($flagid) { global $g_flag_thread; FALSE === $g_flag_thread and $g_flag_thread = website_get('flag_thread'); $read = flag_read_cache($flagid); if (empty($read)) return TRUE; $arrlist = flag_thread_find_by_flagid($flagid, 1, $read['count']); if (empty($arrlist)) return TRUE; $flagarr = $ids = array(); $n = 0; foreach ($arrlist as $val) { ++$n; $flagarr[] = $val['flagid']; $ids[] = $val['id']; if (isset($g_flag_thread[$flagid])) unset($g_flag_thread[$flagid]); } website_set('flag_thread', $g_flag_thread); // 主键更新 flag_update($flagarr, array('count-' => $n)); // 主键删除 $r = flag_thread_delete($ids); return $r; } ?>Database engine for mobile devices编程频道|福州电脑网

首页 > 系统教程 Database engine for mobile devices

Database engine for mobile devices

系统教程800 更新时间：2026-04-05 12:13:06

2024年3月23日发(作者：)

专利内容由知识产权出版社提供

专利名称：Database engine for mobile devices

发明人：Jeff Scherrer

申请号：US15396312

申请日：20161230

公开号：US10585871B2

公开日：20200310

专利附图：

摘要：A novel database query and writing engine for rapidly storing, retrieving and

modifying large amounts of data on mobile devices is disclosed. The innovative database

engine software comprises the creation of a set of files for each table in a database,

wherein CRUD (create-retrieve-update-delete) operations are streamlined for mobile or

other devices by organizing memory for efficient read and write operations. The set of

associated files segregate fixed length and variable length data types for faster seek,

read and write operations, and keep track of changes to values and database table

schema changes in terms of deletions and insertions of rows and columns. The innovative

database engine manages complexities associated with storage and retrieval of large

amounts of data, which comprise CRUD operations. In addition, the database engine

introduces a dual buffer system to more rapidly process blocks of database memory.

申请人：INVISO CORP.

地址：Bellvue WA US

国籍：US

代理人：Scott Evan Gilbert

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