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From "Ryan Blue (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-8950) Add support in ParquetHiveSerde to create table schema from a parquet file
Date Thu, 30 Jul 2015 17:23:04 GMT

    [ https://issues.apache.org/jira/browse/HIVE-8950?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14647986#comment-14647986
] 

Ryan Blue commented on HIVE-8950:
---------------------------------

[~gauravkumar37], the schema is read from the file once and then converted to DDL. The file
is no longer used after that, so schema evolution proceeds as it normally would for any table.

> Add support in ParquetHiveSerde to create table schema from a parquet file
> --------------------------------------------------------------------------
>
>                 Key: HIVE-8950
>                 URL: https://issues.apache.org/jira/browse/HIVE-8950
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Ashish K Singh
>            Assignee: Gaurav Kumar
>         Attachments: HIVE-8950.1.patch, HIVE-8950.2.patch, HIVE-8950.3.patch, HIVE-8950.4.patch,
HIVE-8950.5.patch, HIVE-8950.6.patch, HIVE-8950.7.patch, HIVE-8950.8.patch, HIVE-8950.patch
>
>
> PARQUET-76 and PARQUET-47 ask for creating parquet backed tables without having to specify
the column names and types. As, parquet files store schema in their footer, it is possible
to generate hive schema from parquet file's metadata. This will improve usability of parquet
backed tables.



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