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From "sunfl@certusnet.com.cn" <su...@certusnet.com.cn>
Subject Re: 回复: how to use phoenix index to query data?
Date Fri, 24 Oct 2014 02:47:30 GMT
Fine. If you conduct a select * query, maybe you need to create an index including all your
cols, cause 
 a global index will only be used if all columns referenced in the query are contained by
it. Maybe you can 
try local index. Please read the instructions from the site carefully.
 http://phoenix.apache.org/secondary_indexing.html





CertusNet 
赛特斯信息科技股份有限公司
 

发件人: xuxc1120
发送时间: 2014-10-24 10:25
收件人: user
主题: 回复: 回复: how to use phoenix index to query data?

Now the problem is:

I select * from table where  [condition col1, condition col2, condition col3]‍], (maybe
that table have 10  cols),
i create index on every col,such as "create index col1_idx on table(col1);  create index col2_idx
on table(col2); ...  create index col10_idx on table(col10)‍";
and then i execute the query sql "select * from table where  [condition col1, condition col2,
condition col3],‍" .
for 1.8million rows ,it will takes 10sec , as long as use Filter directly in hbase shell.
i 'd rather know something wrong i have done.

 

------------------ 原始邮件 ------------------
发件人: "sunfl@certusnet.com.cn";<sunfl@certusnet.com.cn>;
发送时间: 2014年10月24日(星期五) 上午10:09
收件人: "user"<user@phoenix.apache.org>; 
主题: Re: 回复: how to use phoenix index to query data?

well. Global index shall need you to include all your query condition columns to facilitate
index usage.
e.g. If you create an index on table (col1), then you may only conduct such queries as select
col1 from table where [condition col1]
If you want to include more query results columns, you can create index on table (col1) include
(col2,col3) as instructions here.





CertusNet 

发件人: xuxc1120
发送时间: 2014-10-24 09:52
收件人: user
主题: 回复: Re: how to use phoenix index to query data?
i use "create index "name_idx" on table("info".qulifier"); 
it is a global index.‍
so ,how to use "name_idx" to speed query?‍

------------------ 原始邮件 ------------------
发件人: "sunfl@certusnet.com.cn";<sunfl@certusnet.com.cn>;
发送时间: 2014年10月24日(星期五) 上午9:00
收件人: "user"<user@phoenix.apache.org>; 
主题: Re: Re: how to use phoenix index to query data?

You may need to confirm what kind of your index type. global index or local index, cause they
differ a lot in usage.
Explain command shall tell you whether index table works.





CertusNet 

 
From: Eli Levine
Date: 2014-10-23 23:04
To: user
Subject: Re: how to use phoenix index to query data?
The EXPLAIN command should help. http://phoenix.apache.org/language/index.html#explain
On Thu, Oct 23, 2014 at 5:40 AM xuxc1120 <xuxc1120@vip.qq.com> wrote:
environment:
hadoop-2.3.0-cdh-5.1.0
hbase-0.98.1-cdh-5.1.0
phoenix-4.1.0‍

i have create a table in phoenix client ,and then create index on some columns, after that
,i insert data to table,
the data have inserted successful and the index table also have records,

but when i use "select * from tb1 where condition=1 and condition2=2" clause in the phoenix
client , for 180W data, it takes almost 10sec, i want to know if the index works?

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