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From "Mithun Radhakrishnan (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-17181) HCatOutputFormat should expose complete output-schema (including partition-keys) for dynamic-partitioning MR jobs
Date Fri, 04 Aug 2017 22:34:00 GMT

     [ https://issues.apache.org/jira/browse/HIVE-17181?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Mithun Radhakrishnan updated HIVE-17181:
----------------------------------------
    Status: Open  (was: Patch Available)

> HCatOutputFormat should expose complete output-schema (including partition-keys) for
dynamic-partitioning MR jobs
> -----------------------------------------------------------------------------------------------------------------
>
>                 Key: HIVE-17181
>                 URL: https://issues.apache.org/jira/browse/HIVE-17181
>             Project: Hive
>          Issue Type: Bug
>          Components: HCatalog
>    Affects Versions: 2.2.0
>            Reporter: Mithun Radhakrishnan
>            Assignee: Mithun Radhakrishnan
>         Attachments: HIVE-17181.1.patch, HIVE-17181.2.patch, HIVE-17181.branch-2.patch
>
>
> Map/Reduce jobs that use HCatalog APIs to write to Hive tables using Dynamic partitioning
are expected to call the following API methods:
> # {{HCatOutputFormat.setOutput()}} to indicate which table/partitions to write to. This
call populates the {{OutputJobInfo}} with details fetched from the Metastore.
> # {{HCatOutputFormat.setSchema()}} to indicate the output-schema for the data being written.
> It is a common mistake to invoke {{HCatOUtputFormat.setSchema()}} as follows:
> {code:java}
> HCatOutputFormat.setSchema(conf, HCatOutputFormat.getTableSchema(conf));
> {code}
> Unfortunately, {{getTableSchema()}} returns only the record-schema, not the entire table's
schema. We'll need a better API for use in M/R jobs to get the complete table-schema.



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