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From "Thomas D'Silva (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (PHOENIX-3709) For a mutable index do not issue a put if the new value is the same as the previous value
Date Fri, 03 Mar 2017 05:33:45 GMT

     [ https://issues.apache.org/jira/browse/PHOENIX-3709?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Thomas D'Silva updated PHOENIX-3709:
------------------------------------
    Priority: Major  (was: Blocker)

> For a mutable index do not issue a put if the new value is the same as the previous value

> ------------------------------------------------------------------------------------------
>
>                 Key: PHOENIX-3709
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-3709
>             Project: Phoenix
>          Issue Type: Improvement
>            Reporter: James Taylor
>
> Here's a raw scan dump taken after the MutableIndexIT.testCoveredColumns() test:
> {code}
> ************ dumping IDX_T000002;hconnection-0x211e75ea **************
> \x00a/0:/1487356752097/DeleteFamily/vlen=0/seqid=0 value = 
> x\x00a/0:0:V2/1487356752231/Put/vlen=1/seqid=0 value = 4
> x\x00a/0:0:V2/1487356752225/Put/vlen=1/seqid=0 value = 4
> x\x00a/0:0:V2/1487356752202/Put/vlen=1/seqid=0 value = 3
> x\x00a/0:0:V2/1487356752149/DeleteColumn/vlen=0/seqid=0 value = 
> x\x00a/0:0:V2/1487356752097/Put/vlen=1/seqid=0 value = 1
> x\x00a/0:_0/1487356752231/Put/vlen=2/seqid=0 value = _0
> x\x00a/0:_0/1487356752225/Put/vlen=2/seqid=0 value = _0
> x\x00a/0:_0/1487356752202/Put/vlen=2/seqid=0 value = _0
> x\x00a/0:_0/1487356752149/Put/vlen=2/seqid=0 value = _0
> x\x00a/0:_0/1487356752097/Put/vlen=2/seqid=0 value = _0
> -----------------------------------------------
> {code}
> An optimization would be not to issue the first Put since the value behind it is the
same.



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