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From "Prasad Chakka (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HIVE-590) Pass type information in genFileSinkPlan
Date Thu, 02 Jul 2009 17:59:47 GMT

    [ https://issues.apache.org/jira/browse/HIVE-590?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12726586#action_12726586
] 

Prasad Chakka commented on HIVE-590:
------------------------------------

well, there is get_table() call that returns Table object. You can use that one.

> Pass type information in genFileSinkPlan
> ----------------------------------------
>
>                 Key: HIVE-590
>                 URL: https://issues.apache.org/jira/browse/HIVE-590
>             Project: Hadoop Hive
>          Issue Type: Bug
>          Components: Query Processor
>            Reporter: Raghotham Murthy
>            Assignee: Namit Jain
>             Fix For: 0.4.0
>
>         Attachments: hive.590.1.patch, hive.590.2.patch
>
>
> Right now only column names are being passed between semanticanalyzer and fetchtask.
Once type information is passed, we can use LazySerDe to serialize the data (into json) in
Driver.getResults().
> Driver.getSchema() should then return a new thrift type ResultSchema instead of String:
> {code}
> struct ResultSchema {
>   // column names, types, comments
>  1: list<hive_metastore.FieldSchema> fieldSchemas,
>  // delimiters etc
>  2: map<string, string> properties
> }
> {code}
> Once this is done, the jdbc client can instantiate a simplified serde from the ResultSchema
and parse the query results.

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