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https://issues.apache.org/jira/browse/HBASE-8218?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13617260#comment-13617260
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Ted Yu commented on HBASE-8218:
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How about adding method setHTable(HTable) ?
The passed HTable would be saved in a field. 

This keeps APIs for other methods same as current. 

AggregationClient would use the passed HTable if it is non-null. 
                
> pass HTable as a parameter to method of AggregationClient
> ---------------------------------------------------------
>
>                 Key: HBASE-8218
>                 URL: https://issues.apache.org/jira/browse/HBASE-8218
>             Project: HBase
>          Issue Type: Improvement
>          Components: Client, Coprocessors
>    Affects Versions: 0.94.3
>            Reporter: cuijianwei
>
> In AggregationClient, methods such as max(...), min(...) pass 'tableName' as 
> a parameter, then a HTable will be created in the method, before the method 
> return, the created HTable will be closed.
> The process above may be heavy because each call must create and close a 
> HTable. The situation becomes worse when there is only one thread access 
> HBase using AggregationClient. The underly HConnection of created HTable will 
> also be created and then closed each time when we invoke these method because 
> no other HTables using the HConnection. This operation is heavy. Therefore, 
> can we add another group of methods which pass HTable or HTablePool as a 
> parameter to methods defined in AggregationClient? 

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