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From "Guido Serra aka Zeph (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HBASE-7645) put without timestamp duplicates the record/row
Date Tue, 22 Jan 2013 17:28:14 GMT

     [ https://issues.apache.org/jira/browse/HBASE-7645?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Guido Serra aka Zeph resolved HBASE-7645.
-----------------------------------------

    Resolution: Not A Problem
    
> put without timestamp duplicates the record/row
> -----------------------------------------------
>
>                 Key: HBASE-7645
>                 URL: https://issues.apache.org/jira/browse/HBASE-7645
>             Project: HBase
>          Issue Type: Brainstorming
>          Components: Client
>            Reporter: Guido Serra aka Zeph
>            Priority: Trivial
>
> if I call a couple of times SQOOP on the same dataset, outputting to HBase,
> I will end up with duplicated data...
> {code}
> hbase(main):030:0> get "dump_HKFAS.sales_order", "1", {COLUMN => "mysql:created_at",
VERSIONS => 4}
> COLUMN                             CELL                                             
                                               
> mysql:created_at                  timestamp=1358853505756, value=2011-12-21 18:07:38.0
                                            
> mysql:created_at                  timestamp=1358790515451, value=2011-12-21 18:07:38.0
                                            
> 2 row(s) in 0.0040 seconds
> today's sqoop run
> hbase(main):031:0> Date.new(1358853505756).toString()
> => "Tue Jan 22 11:18:25 UTC 2013"
> yesterday's sqoop run
> hbase(main):032:0> Date.new(1358790515451).toString()
> => "Mon Jan 21 17:48:35 UTC 2013"
> {code}
> the fact that the Put.add() method writes the kv without checking if, apart of the timestamp,
the value has not changed, is it by design? or a bug?
> I mean, what's the idea behind? Shall it be SQOOP (the client application) supposed to
handle the read on the value before issuing an add() statement call?
> from: trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/client/Put.java
> {code}
>   public Put add(byte [] family, byte [] qualifier, byte [] value) {
>     return add(family, qualifier, this.ts, value);
>   }
>   public Put add(byte [] family, byte [] qualifier, long ts, byte [] value) {
>     List<KeyValue> list = getKeyValueList(family);
>     KeyValue kv = createPutKeyValue(family, qualifier, ts, value);
>     list.add(kv);
>     familyMap.put(kv.getFamily(), list);
>     return this;
>   }
> {code}

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