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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-5280) Extend TableSource to support nested data
Date Mon, 09 Jan 2017 15:45:58 GMT

    [ https://issues.apache.org/jira/browse/FLINK-5280?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15812080#comment-15812080
] 

ASF GitHub Bot commented on FLINK-5280:
---------------------------------------

Github user fhueske commented on a diff in the pull request:

    https://github.com/apache/flink/pull/3039#discussion_r95178608
  
    --- Diff: flink-libraries/flink-table/src/main/scala/org/apache/flink/table/sources/CsvTableSource.scala
---
    @@ -53,7 +53,9 @@ class CsvTableSource(
         ignoreFirstLine: Boolean = false,
         ignoreComments: String = null,
         lenient: Boolean = false)
    -  extends AbstractBatchStreamTableSource[Row]
    +  extends BatchTableSource[Row]
    +  with StreamTableSource[Row]
    +  with DefinedFieldNames
    --- End diff --
    
    If we define `returnType` as `new RowTypeInfo(fieldTypes, fieldNames)`, we do not need
to implement `DefinedFieldNames`.


> Extend TableSource to support nested data
> -----------------------------------------
>
>                 Key: FLINK-5280
>                 URL: https://issues.apache.org/jira/browse/FLINK-5280
>             Project: Flink
>          Issue Type: Improvement
>          Components: Table API & SQL
>    Affects Versions: 1.2.0
>            Reporter: Fabian Hueske
>            Assignee: Ivan Mushketyk
>
> The {{TableSource}} interface does currently only support the definition of flat rows.

> However, there are several storage formats for nested data that should be supported such
as Avro, Json, Parquet, and Orc. The Table API and SQL can also natively handle nested rows.
> The {{TableSource}} interface and the code to register table sources in Calcite's schema
need to be extended to support nested data.



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