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From "Sergey Shelukhin (JIRA)" <>
Subject [jira] [Commented] (HIVE-5264) SQL generated by not compliant with Postgres.
Date Wed, 11 Sep 2013 18:10:51 GMT


Sergey Shelukhin commented on HIVE-5264:

HIVE-5265 filed to fix this. Postgres is probably the 2nd most popular metastore backend,
so we would want to fix this. But first fallback needs to be fixed.
> SQL generated by not compliant with Postgres.
> ---------------------------------------------------------------------
>                 Key: HIVE-5264
>                 URL:
>             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
> 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
> 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 by default, so the above SQL is generated by
hive/metastore/, i.e., this is not a Datanucleus problem.
> When I set, then the Metastore backed by Postgres works.

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