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Date: Tue, 17 Sep 2013 22:31:52 +0000 (UTC)
From: "Sergey Shelukhin (JIRA)" <jira@apache.org>
To: hive-dev@hadoop.apache.org
Message-ID: <JIRA.12667951.1378857084698.150332.1379457112965@arcas>
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References: <JIRA.12667951.1378857084698@arcas>
Subject: [jira] [Updated] (HIVE-5264) SQL generated by
 MetaStoreDirectSql.java not compliant with Postgres.
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     [ https://issues.apache.org/jira/browse/HIVE-5264?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sergey Shelukhin updated HIVE-5264:
-----------------------------------

    Status: Patch Available  (was: Open)
    
> SQL generated by MetaStoreDirectSql.java not compliant with Postgres.
> ---------------------------------------------------------------------
>
>                 Key: HIVE-5264
>                 URL: https://issues.apache.org/jira/browse/HIVE-5264
>             Project: Hive
>          Issue Type: Bug
>          Components: Metastore
>    Affects Versions: 0.12.0
>         Environment: Ubuntu 12.04
> PostgreSQL 9.1.8
>            Reporter: Alexander Behm
>            Assignee: Sergey Shelukhin
>         Attachments: D12993.1.patch, HIVE-5264.patch
>
>
> Some operations against the Hive Metastore seem broken
> against Postgres.
> For example, when using HiveMetastoreClient.listPartitions()
> the Postgres logs show queries such as:
> 2013-09-09 19:10:01 PDT STATEMENT:  select PARTITIONS.PART_ID from
> PARTITIONS  inner join TBLS on PARTITIONS.TBL_ID = TBLS.TBL_ID   inner
> join DBS on TBLS.DB_ID = DBS.DB_ID  where TBLS.TBL_NAME = $1 and
> DBS.NAME = $2 order by PART_NAME asc
> with a somewhat cryptic (but correct) error:
> ERROR:  relation "partitions" does not exist at character 32
> Postgres identifiers are somewhat unusual. Unquoted identifiers are interpreted as lower case (there is no Postgres option to change this). Since the Metastore table schema uses upper case table names, the correct SQL requires escaped identifiers to those tables, i.e.,
> select "PARTITIONS"."PART_ID" from "PARTITIONS"...
> Hive sets metastore.try.direct.sql=true by default, so the above SQL is generated by hive/metastore/MetaStoreDirectSql.java, i.e., this is not a Datanucleus problem.
> When I set metastore.try.direct.sql=false, then the Metastore backed by Postgres works.

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