Mysql官方文檔的介紹：
成都創(chuàng)新互聯(lián)公司成都網(wǎng)站建設按需設計，是成都網(wǎng)站開發(fā)公司,為成都木包裝箱提供網(wǎng)站建設服務,有成熟的網(wǎng)站定制合作流程，提供網(wǎng)站定制設計服務：原型圖制作、網(wǎng)站創(chuàng)意設計、前端HTML5制作、后臺程序開發(fā)等。成都網(wǎng)站制作熱線：028-86922220
|
Value |
Meaning |
|
0 |
Table and database names are stored on disk using the lettercase specified in the CREATE TABLE orCREATE DATABASE statement. Name comparisons are case sensitive. You should not set this variable to 0 if you are running MySQL on a system that has case-insensitive file names (such as Windows or Mac OS X). If you force this variable to 0 with --lower-case-table-names=0 on a case-insensitive file system and access MyISAM tablenames using different lettercases, index corruption may result. |
|
1 |
Table names are stored in lowercase on disk and name comparisons are not case sensitive. MySQL converts all table names to lowercase on storage and lookup. This behavior also applies to database names and table aliases. |
|
2 |
Table and database names are stored on disk using the lettercase specified in the CREATE TABLE orCREATE DATABASE statement, but MySQL converts them to lowercase on lookup. Name comparisons are not case sensitive. This works only on file systems that are not case sensitive! InnoDB table names are stored in lowercase, as for lower_case_table_names=1. |
默認為0，大小寫敏感。
設置1，大小寫不敏感。創(chuàng)建的表，數(shù)據(jù)庫都是以小寫形式存放在磁盤上，對于sql語句都是轉換為小寫對表和DB進行查找。
設置2，創(chuàng)建的表和DB依據(jù)語句上格式存放，凡是查找都是轉換為小寫進行。
If you plan to set the lower_case_table_names system variable to 1 on Unix, you must first convert your old database and table names to lowercase before stopping mysqld and restarting it with the new variable setting. To do this for an individual table, use RENAME TABLE:
當想設置lower_case_table_names = 1時，在重啟數(shù)據(jù)庫實例之前就需要將原來的數(shù)據(jù)庫和表轉換為小寫。
官方文檔的解釋。要開啟lower_case_table_names = 1。先要將大寫字母數(shù)據(jù)庫更改為小寫。否則將找不到數(shù)據(jù)庫名。
所以要想忽略大小寫，還需要提前將大寫數(shù)據(jù)庫名更改小寫，否則報錯。數(shù)據(jù)庫名無法rename.可以新建一個小寫的數(shù)據(jù)庫名。
然后rename table 到新的數(shù)據(jù)庫，完成表的遷移。
在進行數(shù)據(jù)庫參數(shù)設置之前，需要掌握這個參數(shù)帶來的影響，切不可盲目設置。
重慶分公司
重慶分公司
