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From "Guangxu Cheng (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-18001) Extend the "count" shell command to support specified conditions
Date Mon, 15 May 2017 07:54:04 GMT

    [ https://issues.apache.org/jira/browse/HBASE-18001?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16010120#comment-16010120
] 

Guangxu Cheng commented on HBASE-18001:
---------------------------------------

bq.Are users still able to pass on the size of cache to scan?

{code}
params = {
          'INTERVAL' => 1000,
          'CACHE' => 10
        }.merge(params)

        scan = table._hash_to_scan(params)
{code}
{code}
-        count = table._count_internal(params['INTERVAL'].to_i, params['CACHE'].to_i) do |cnt,
row|
+        count = table._count_internal(params['INTERVAL'].to_i, scan) do |cnt, row|
{code}
sure, parameter CACHE will be set to the scan by _hash_to_scan(params) in couter.rb

> Extend the "count" shell command to support specified conditions
> ----------------------------------------------------------------
>
>                 Key: HBASE-18001
>                 URL: https://issues.apache.org/jira/browse/HBASE-18001
>             Project: HBase
>          Issue Type: Improvement
>          Components: shell
>    Affects Versions: 2.0.0
>            Reporter: Guangxu Cheng
>            Assignee: Guangxu Cheng
>            Priority: Minor
>              Labels: beginner
>             Fix For: 2.0.0
>
>         Attachments: HBASE-18001-v1.patch
>
>
> shell command "count" can only count the number of rows in a table.
> And, it could not count the number of the specified conditions.
> Can we allow users to specified conditions like command "scan"?
> In that case, we can count the number of rows under any conditions.



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