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    以新世代MySQL 8.0支援行動應用 === ###### tags: `2018`, `R2` ##### 位置: R2 ##### 講者:杜修文 {%slideshare 貼這裡xxxx/yyyy %} --- [TOC] --- ## SQL - Oracle是全世界極大的DB的供應商 - MySQL是其中的一個分支 ### Source LAMP Stack - Linux - Appache - MySQL - PHP, Perl, Python... ## MySQL發展 - 支援CPU數增加 ### SQL特性 * 關聯式資料庫很重要 * 但某些場合不太好用 * 彈性不佳 ### NoSQL特性 * MongoDB * 強調彈性 * 無法保證連續性 ### 最近的發展 * 開啟對行動運算的支援 ### 行動應用需要什麼資料 - 位置資料 - GIS - 有彈性的資料 - NoSQL - 持續可用的資料 - 高可用資料儲存 ### 5.7 版起整合 Boost.Geometry * 取代或改進客製化程式碼 * 用於 geometry representations * 符合OGC * 同時改進性能 * Boost.Geometry包含 * 業界及行業專家 * 活躍也扎實的社群 * 我們也是Boost.Geometry的**貢獻者** * Two full-time developers contributing upstream ### InnoDB的Spatial indexes * R - tree based * 完整支援交易 * Predicate locking以防止幻讀 * 記錄中含最小邊框方塊 * 小且緊湊 * 目前只支援2D資料 * 將來目標式加上對3D的支援 * 支援歷史的地理索引DDL語法 ### 額外的功能 * GeoHash * 在生成的哈希值上加 B-tree 索引 * 快速查找完全相符的資料 * 在趨近搜尋時不是很精準 * GeoJSON * 更多功能 * ST_IsValid(), ST_Simplify(),ST_Buffer()... * ST_Distance_Sphere() * 支援多種Spatial Reference ## 建立一套應用系統 - 售票系統 ### Case Study:我們的售票系統 * 5個Table * venues * seats * events * tickets * orders ### 我們的定位來自哪裡? * 許多定位以行動設備下單 * 不僅是一個題目 * 要減少再畫面間的點擊 * 以用戶的位置為內容 ### 今天以後的活動和指定位置的距離(考量到地球是圓的) SELECT ? ROUND ? AS FROM ? INNER JOIN ? ON ? WHERE ? ORDER BY ? ### 行動也代表 emoji :satisfied: * 以Emoji字元輸入 * MySQL 8.0 預設為utf8mb4 * 支援最新的Unicode 9.0 * 新的規則基於DUCET(Default Unicode Collation Element Table) ### MySQL 8.0 vs MySQL 5.7 > 簡單來說3倍效能增進 ### MySQL Interfaces ### 存在資料庫的JSON mysql> SELECT id,doc FROM seats WHERE id=28100\G ### JSON Functions - 有一大推可以用 - [Ref](https://dev.mysql.com/doc/refman/8.0/en/json-functions.html) ## 其實不需要這麼複雜的MySQL ### X DevAPI Connector(s) * 簡單來說就是不用去做上面那些細項 * 用以開發CRUD為基礎 * 來操作JSON * CollectionAdd * CollectionRemove ### MySQL Shell 有什麼新功能 * 可客製化提示 * 包括內容和對話訊息 * 支援客製化字型和顏色 * 自動完成 / 內容輔助 * 支援全 Unicode ### MySQL Cluster * InnoDB cluster ### MySQL 企業版 * 先進功能 * 擴充性

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