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Date: Thu, 20 Sep 2012 17:42:08 +1100 (NCT)
From: "Frank Li (JIRA)" <jira@apache.org>
To: hive-dev@hadoop.apache.org
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Subject: [jira] [Updated] (HIVE-3472) Build An Analytical SQL Engine for
 MapReduce
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     [ https://issues.apache.org/jira/browse/HIVE-3472?page=3Dcom.atlassian=
.jira.plugin.system.issuetabpanels:all-tabpanel ]

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

    Description:=20
While there are continuous efforts in extending Hive=E2=80=99s SQL support =
(e.g., see some recent examples such as HIVE-2005 and HIVE-2810), many wide=
ly used SQL constructs are still not supported in HiveQL, such as selecting=
 from m=E8=88=85=E8=88=85=E5=AE=B6ultiple tables, subquery in WHERE clauses=
, etc. =20

We propose to build a SQL-92 full compatible engine (for MapReduce based an=
alytical query processing) as an extension to Hive.=20

The SQL frontend will co-exist with the HiveQL frontend; consequently, one =
can  mix SQL and HiveQL statements in their queries (switching between Hive=
QL mode and SQL-92 mode using a =E2=80=9Chive.ql.mode=E2=80=9D parameter be=
fore each query statement). This way useful Hive extensions are still acces=
sible to users.=20


  was:
While there are continuous efforts in extending Hive=E2=80=99s SQL support =
(e.g., see some recent examples such as HIVE-2005 and HIVE-2810), many wide=
ly used SQL constructs are still not supported in HiveQL, such as selecting=
 from multiple tables, subquery in WHERE clauses, etc. =20

We propose to build a SQL-92 full compatible engine (for MapReduce based an=
alytical query processing) as an extension to Hive.=20

The SQL frontend will co-exist with the HiveQL frontend; consequently, one =
can  mix SQL and HiveQL statements in their queries (switching between Hive=
QL mode and SQL-92 mode using a =E2=80=9Chive.ql.mode=E2=80=9D parameter be=
fore each query statement). This way useful Hive extensions are still acces=
sible to users.=20


   =20
> 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=E2=80=99s SQL suppor=
t (e.g., see some recent examples such as HIVE-2005 and HIVE-2810), many wi=
dely used SQL constructs are still not supported in HiveQL, such as selecti=
ng from m=E8=88=85=E8=88=85=E5=AE=B6ultiple tables, subquery in WHERE claus=
es, etc. =20
> We propose to build a SQL-92 full compatible engine (for MapReduce based =
analytical query processing) as an extension to Hive.=20
> The SQL frontend will co-exist with the HiveQL frontend; consequently, on=
e can  mix SQL and HiveQL statements in their queries (switching between Hi=
veQL mode and SQL-92 mode using a =E2=80=9Chive.ql.mode=E2=80=9D parameter =
before each query statement). This way useful Hive extensions are still acc=
essible to users.=20

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