順序執行以下sql語句

1.刪除表主鍵約束

ALTER TABLE mobilems_m_weex DROP PRIMARY KEY;

2.新增新主鍵欄位id

ALTER TABLE mobilems_m_weex ADD id BIGINT(20) NOT NULL COMMENT ‘主鍵’ FIRST;

3.id賦值

#顯示行號的sql
SELECT
@r := @r + 1 AS row_num,a.*
FROM mobilems_m_weex a, (SELECT @r := 0) b;

把已經存在的行號當作主鍵賦值給主鍵

UPDATE mobilems_m_weex mmw1 INNER
 
 JOIN (SELECT
                                          @r := @r + 1 AS row_num,
                                          mmw2.bundle_id,
                                          mmw2.lowest_support_version
                                        FROM mobilems_m_weex mmw2, (SELECT @r := 0) b) tb
    ON
 
 mmw1.bundle_id = tb.bundle_id AND mmw1.lowest_support_version = tb.lowest_support_version SET mmw1.id = tb.row_num;

5.設定主鍵

ALTER TABLE mobilems_m_weex
  ADD PRIMARY KEY (`id`);