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From "Muhammad Ehsan ul Haque (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-8267) Exposing hbase cell latest timestamp through hbase columns mappings to hive columns.
Date Tue, 30 Sep 2014 21:33:33 GMT

    [ https://issues.apache.org/jira/browse/HIVE-8267?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14153794#comment-14153794
] 

Muhammad Ehsan ul Haque commented on HIVE-8267:
-----------------------------------------------

[~navis] do you need more information on that?
Also can you tell me how to get access to edit the confluence page [Hive HBase Integration|https://cwiki.apache.org/confluence/display/Hive/HBaseIntegration]?

> Exposing hbase cell latest timestamp through hbase columns mappings to hive columns.
> ------------------------------------------------------------------------------------
>
>                 Key: HIVE-8267
>                 URL: https://issues.apache.org/jira/browse/HIVE-8267
>             Project: Hive
>          Issue Type: New Feature
>          Components: HBase Handler
>    Affects Versions: 0.14.0
>            Reporter: Muhammad Ehsan ul Haque
>            Priority: Minor
>             Fix For: 0.14.0
>
>         Attachments: HIVE-8267.0.patch
>
>
> Previous attempts HIVE-2781 (not accepted), HIVE-2828 (broken and proposed with restricted
feature).
> The feature is to have hbase cell latest timestamp accessible in hive query, by mapping
the cell timestamp with a hive column, using mapping format like 
> {code}:timestamp:cf:[optional qualifier or qualifier prefix]{code}
> The hive create table statement would be like
> h4. For mapping a cell latest timestamp.
> {code}
> CREATE TABLE hive_hbase_table (key STRING, col1 STRING, col1_ts BIGINT)
> STORED BY 'org.apache.hadoop.hive.hbase.HBaseStorageHandler'
> WITH SERDEPROPERTIES ("hbase.columns.mapping" = ":key,cf:qualifier, :timestamp:cf:qualifier")
> TBLPROPERTIES ("hbase.table.name" = "hbase_table");
> {code}
> h4. For mapping a column family latest timestamp.
> {code}
> CREATE TABLE hive_hbase_table (key STRING, valuemap MAP<STRING, STRING>, timestampmap
MAP<STRING, BIGINT>)
> STORED BY 'org.apache.hadoop.hive.hbase.HBaseStorageHandler'
> WITH SERDEPROPERTIES ("hbase.columns.mapping" = ":key,cf:,:timestamp:cf:")
> TBLPROPERTIES ("hbase.table.name" = "hbase_table");
> {code}
> h4. Providing default cell value
> {code}
> CREATE TABLE hive_hbase_table(key int, value string, value_timestamp bigint)
> STORED BY 'org.apache.hadoop.hive.hbase.HBaseStorageHandler'
> WITH SERDEPROPERTIES ("hbase.columns.mapping" = "cf:qualifier, :timestamp:cf:qualifier",
>                       "hbase.put.default.cell.value" = "default value")
> TBLPROPERTIES ("hbase.table.name" = "hbase_table");
> {code}



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