When I insert data into carbondata from one table, I should do as the
following:
1、select count(1) from table1
and then
2、insert into table table1 select * from table1
Why I should execute "select count(1) from table1" first?
because the number of tasks are compute by carbondata, it is releated to
转发邮件信息
发件人："胡健军"
发送日期：2017-10-23 19:42:42
收件人：u...@carbondata.apache.org
主题：Fw:carbondata在创建表时报错，请问下老师是什么原因
Forwarding messages
From: "胡健军"
Date: 2017-10-23 19:28:59
To: u...@carbondata.apache.org
Subject: carbondata在创建表时报错，请问下老师是什么原因
scala> c
Yes, Jin Zhou.
Merge all index files to one in a segment would be useful feature. it would
significantly improve query performance.
Regards
Liang
Jin Zhou wrote
> Hi, ravipesala
>
> Thank you for your proposal, merging index file is a very useful feature
> as
> we have already met serious perfo
Hi Jin Zhou
Thanks for starting this discussion.
1. For your first proposal : Currently , segment is the system internal
concept, not expose to outside.
Can you provide what exact problems do you encounter? we can find the
alternative solution for your problems.
--
Hi Ravi
Yes, so we need provide a table level property for blocklet size to
configure while creating a table. can you please create one JIRA for this ?
How about liking this:
CREATE TABLE IF NOT EXISTS (column_name,column_type) STORED BY
'carbondata' TBLPROPERTIES('TABLE_BLOCKLETSIZE'='128')
Hi ravipesala:
Ok, I will raise jira for this and try to implement this.
--
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