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From "Xiang Li (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-18824) Add meaningful comment to HConstants.LATEST_TIMESTAMP to explain why it is MAX_VALUE
Date Tue, 19 Sep 2017 13:42:01 GMT

     [ https://issues.apache.org/jira/browse/HBASE-18824?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Xiang Li updated HBASE-18824:
-----------------------------
    Description: 
In http://hbase.apache.org/book.html#versions,
1. In chapter 27.2.4 Put 
bq. Doing a put always creates a new version of a cell, at a certain timestamp. {color:#205081}By
default the system uses the server’s currentTimeMillis{color}, ...

2. In chapter 27.2.5 Delete
bq. Deletes work by creating tombstone markers. For example, let’s suppose we want to delete
a row. For this you can specify a version, or else {color:#205081}by default the currentTimeMillis
is used.{color}...

Checking the code, when timestamp is not specified, HConstants.LATEST_TIMESTAMP is used, which
is Long.MAX_VALUE.
Thanks to [~chia7712]'s comment. 


  was:
In http://hbase.apache.org/book.html#versions,
1. In chapter 27.2.4 Put 
bq. Doing a put always creates a new version of a cell, at a certain timestamp. {color:#205081}By
default the system uses the server’s currentTimeMillis{color}, ...

2. In chapter 27.2.5 Delete
bq. Deletes work by creating tombstone markers. For example, let’s suppose we want to delete
a row. For this you can specify a version, or else {color:#205081}by default the currentTimeMillis
is used.{color}...

Checking the code, when timestamp is not specified, HConstants.LATEST_TIMESTAMP is used, which
is Long.MAX_VALUE. 



> Add meaningful comment to HConstants.LATEST_TIMESTAMP to explain why it is MAX_VALUE
> ------------------------------------------------------------------------------------
>
>                 Key: HBASE-18824
>                 URL: https://issues.apache.org/jira/browse/HBASE-18824
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Xiang Li
>            Assignee: Xiang Li
>            Priority: Minor
>
> In http://hbase.apache.org/book.html#versions,
> 1. In chapter 27.2.4 Put 
> bq. Doing a put always creates a new version of a cell, at a certain timestamp. {color:#205081}By
default the system uses the server’s currentTimeMillis{color}, ...
> 2. In chapter 27.2.5 Delete
> bq. Deletes work by creating tombstone markers. For example, let’s suppose we want
to delete a row. For this you can specify a version, or else {color:#205081}by default the
currentTimeMillis is used.{color}...
> Checking the code, when timestamp is not specified, HConstants.LATEST_TIMESTAMP is used,
which is Long.MAX_VALUE.
> Thanks to [~chia7712]'s comment. 



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