DBeaver

Question

当运行在 1,3b 行数据库上查询时，我得到“读取超时”。

这不是将推文中的主题标签组合在一起的特定高级查询：

SELECT case when match(hashtag, 
            '[Cc]orona.*|COVID.*|[Cc]ovid.*|[Cc]oVID_19.*|[Cc]orvid19.*|COVD19.*|CORONA.*|KILLTHEVI.*|SARSCoV.*|ChineseVi.*|WuhanVir.*|ChinaVir.*|[Vv]irus.*|
            [Qq]uarantine|[Pp]andemic.*|[Cc]linical[Tt]rial.*|FlattenTheCurve.*|SocialDistancing.*|StayHome.*|StayTheFHome.*|StayAtHome.*|stopthespread.*|
            SafeHands.*|WashYourHands.*|SelfIsolation.*')                           then 'COVID19' 
            when match(hashtag, '[Jj]anta[Cc]urfew.*|[Jj]anata[Cc]urfew.*')         then 'JantaCurfew'
            when match(hashtag, 'Bhula.*')                                          then 'Bhula'
            when match(hashtag, '[Ss]t[Pp]atrick.*|HappyStPatrick')                 then 'StPatricks day'
            when match(hashtag, '[Cc]hina.*')                                       then 'China'
            when match(hashtag, '[Ii]taly.*')                                       then 'Italy'
            when match(hashtag, '[Ii]ran.*')                                        then 'Iran'
            when match(hashtag, '[Ii]ndia.*')                                       then 'India'
            when match(hashtag, '[Hh]appy[Mm]others[Dd]ay.*|[Mm]others[Dd]ay.*')    then 'MothersDay'
            else hashtag END
            as Hashtag,
  SUM(CASE WHEN created >= '2020-05-14 00:00:00' AND created <= '2020-03-14 23:59:59' THEN 1 END) "May 14th'20",
  SUM(CASE WHEN created >= '2020-05-13 00:00:00' AND created <= '2020-03-13 23:59:59' THEN 1 END) "May 13th'20",
  SUM(CASE WHEN created >= '2020-05-12 00:00:00' AND created <= '2020-03-12 23:59:59' THEN 1 END) "May 12th'20"
FROM twitterDBhashtags
group by Hashtag 
order by "May 12th'20" DESC limit 20;

Clickhouse 运行在条带硬盘上并通过 GB 网络访问。

如何更改超时（如果这是挑战）以允许更多时间？

如果可能的话，我非常希望能够运行多分钟查询而不会收到“读取超时”消息。

Answer 1

CH jdbc 驱动程序默认有一个 socket_timeout = 30000 (30s)

Under the Advanced tab, you can configure advanced connections settings, > e.g., Character Coding.

连接/高级属性/新建属性 -> socket_timeout = 300000

DBeaver - Clickhouse - SQL 错误 [159] .. 读取超时

DBeaver - Clickhouse - SQL Error [159] .. Read timed out

clickhouse