[jira] [Commented] (SPARK-21224) Support a DDL-formatted string as schema in reading for R

["Apache Spark (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-21224?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16064446#comment-16064446 ] 

Apache Spark commented on SPARK-21224:
--------------------------------------

User 'HyukjinKwon' has created a pull request for this issue:
https://github.com/apache/spark/pull/18431

> Support a DDL-formatted string as schema in reading for R
> ---------------------------------------------------------
>
>                 Key: SPARK-21224
>                 URL: https://issues.apache.org/jira/browse/SPARK-21224
>             Project: Spark
>          Issue Type: Improvement
>          Components: SparkR
>    Affects Versions: 2.2.0
>            Reporter: Hyukjin Kwon
>            Priority: Minor
>
> This might have to be a followup for SPARK-20431 but I just decided to make this separate for R specifically as many PRs might be confusing.
> Please refer the discussion in the PR and SPARK-20431.
> In a simple view, this JIRA describes the support for a DDL-formetted string as schema as below:
> {code}
> mockLines <- c("{\"name\":\"Michael\"}",
>                "{\"name\":\"Andy\", \"age\":30}",
>                "{\"name\":\"Justin\", \"age\":19}")
> jsonPath <- tempfile(pattern = "sparkr-test", fileext = ".tmp")
> writeLines(mockLines, jsonPath)
> df <- read.df(jsonPath, "json", "name STRING, age DOUBLE")
> collect(df)
> {code}



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