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From "Frank Li (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-3472) Build An Analytical SQL Engine for MapReduce
Date Thu, 20 Sep 2012 06:42:08 GMT

     [ https://issues.apache.org/jira/browse/HIVE-3472?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Frank Li updated HIVE-3472:
---------------------------

    Description: 
While there are continuous efforts in extending Hive’s SQL support (e.g., see some recent
examples such as HIVE-2005 and HIVE-2810), many widely used SQL constructs are still not supported
in HiveQL, such as selecting from m舅舅家ultiple tables, subquery in WHERE clauses, etc.
 

We propose to build a SQL-92 full compatible engine (for MapReduce based analytical query
processing) as an extension to Hive. 

The SQL frontend will co-exist with the HiveQL frontend; consequently, one can  mix SQL and
HiveQL statements in their queries (switching between HiveQL mode and SQL-92 mode using a
“hive.ql.mode” parameter before each query statement). This way useful Hive extensions
are still accessible to users. 


  was:
While there are continuous efforts in extending Hive’s SQL support (e.g., see some recent
examples such as HIVE-2005 and HIVE-2810), many widely used SQL constructs are still not supported
in HiveQL, such as selecting from multiple tables, subquery in WHERE clauses, etc.  

We propose to build a SQL-92 full compatible engine (for MapReduce based analytical query
processing) as an extension to Hive. 

The SQL frontend will co-exist with the HiveQL frontend; consequently, one can  mix SQL and
HiveQL statements in their queries (switching between HiveQL mode and SQL-92 mode using a
“hive.ql.mode” parameter before each query statement). This way useful Hive extensions
are still accessible to users. 


    
> Build An Analytical SQL Engine for MapReduce
> --------------------------------------------
>
>                 Key: HIVE-3472
>                 URL: https://issues.apache.org/jira/browse/HIVE-3472
>             Project: Hive
>          Issue Type: New Feature
>    Affects Versions: 0.10.0
>            Reporter: Shengsheng Huang
>         Attachments: SQL-design.pdf
>
>
> While there are continuous efforts in extending Hive’s SQL support (e.g., see some
recent examples such as HIVE-2005 and HIVE-2810), many widely used SQL constructs are still
not supported in HiveQL, such as selecting from m舅舅家ultiple tables, subquery in WHERE
clauses, etc.  
> We propose to build a SQL-92 full compatible engine (for MapReduce based analytical query
processing) as an extension to Hive. 
> The SQL frontend will co-exist with the HiveQL frontend; consequently, one can  mix SQL
and HiveQL statements in their queries (switching between HiveQL mode and SQL-92 mode using
a “hive.ql.mode” parameter before each query statement). This way useful Hive extensions
are still accessible to users. 

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