mysql - 如何选取单行a 100,000,000 x

Question

我想生成以下输出，使用来自选择的单行。

SELECT max(t1.id)+1 as new_id FROM t1;
-> 101

However I want to do

SELECT s.last_id, sequence(1..100000000) as new_id 
FROM (SELECT max(table1.id)+1 as last_id FROM table1) s;
-> 101,1
-> 101,2
-> 101,3 
......
-> 101,100000000

在 postgreSQL 中，我可以使用:

SELECT s.last_id, generate_series(1,100000000) 
FROM (SELECT max(table1.id)+1 as last_id FROM table1) s;  -- returns 100,000,000 rows 

如何在不使用临时表的情况下在 MySQL 中执行此操作？

Answer 1

对 Bruno 的解决方案略作修改

SELECT (SELECT COALESCE(max(id),0)+1 FROM table1), 
        @rownum:=@rownum+1 new_id 
FROM 
(SELECT @rownum:=0) r, 
(SELECT 1 UNION ALL SELECT 2) t1,
(SELECT 1 UNION ALL SELECT 2) t2,
(SELECT 1 UNION ALL SELECT 2) t3,
(SELECT 1 UNION ALL SELECT 2) t4,
(SELECT 1 UNION ALL SELECT 2) t5,
(SELECT 1 UNION ALL SELECT 2) t6,
(SELECT 1 UNION ALL SELECT 2) t7
LIMIT 100

或者没有变量的另一个版本

SELECT (SELECT Coalesce(MAX(id), 0) + 1
        FROM   table1),
       t1.n * 10 + t2.n + 1 AS new_id
FROM   (SELECT 0 AS n UNION ALL
        SELECT 1      UNION ALL
        SELECT 2      UNION ALL
        SELECT 3      UNION ALL
        SELECT 4      UNION ALL
        SELECT 5      UNION ALL
        SELECT 6      UNION ALL
        SELECT 7      UNION ALL
        SELECT 8      UNION ALL
        SELECT 9) t1,
       (SELECT 0 AS n UNION ALL
        SELECT 1      UNION ALL
        SELECT 2      UNION ALL
        SELECT 3      UNION ALL
        SELECT 4      UNION ALL
        SELECT 5      UNION ALL
        SELECT 6      UNION ALL
        SELECT 7      UNION ALL
        SELECT 8      UNION ALL
        SELECT 9) t2
ORDER  BY new_id