[jira] [Created] (SPARK-21224) Support a DDL-formatted string in DataFrameReader.schema in R

["Hyukjin Kwon (JIRA)" <ji...@apache.org>]

Hyukjin Kwon created SPARK-21224:
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             Summary: Support a DDL-formatted string in DataFrameReader.schema in 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 it might be confused.

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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