MySQL 上的 WITH 语句语法错误 1064

Question

I am trying to use a WITH statement so that I can use the sum of 2 columns later on but I keep getting hit with an ERROR 1064 (42000): You have an error in your SQL syntax

I fiddled around with different ways of using the statement with no success so I am starting to think that it's perhaps because of my MySQL version (select @@version says its '5.7.38-0ubuntu0.18.04.1').

My command:

WITH timings AS (
SELECT id, timestart, timestart+timeduration AS timeend FROM events WHERE userid = 1000
)
SELECT * FROM timings WHERE timeend > ...

Could someone perhaps enlighten me on my mistaken or perhaps give me an alternative for the handling of a sum of columns. Thank you in advance.

Answer 1

Common Table Expressions (aka CTE or With s) were introduced in Mysql 8. So yes, you either update your DB engine (I'd recommend that) or rewrite your CTE as a subquery:

SELECT 
    * 
FROM (
    SELECT 
        id, 
        timestart, 
        timestart+timeduration AS timeend 
    FROM events 
    WHERE userid = 1000
) timings 
WHERE timeend > ...