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From "kant kodali (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SPARK-22228) Add support for Array<primitive_type> so from_json can parse
Date Mon, 09 Oct 2017 18:50:00 GMT

     [ https://issues.apache.org/jira/browse/SPARK-22228?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

kant kodali updated SPARK-22228:
--------------------------------
    Description: 
{code:java}
val inputDS = Seq("""["foo", "bar"]""").toDF
{code}


{code:java}
inputDS.printSchema()
root
 |-- value: string (nullable = true)

{code}

Input Dataset inputDS

{code:java}
inputDS.show(false)

value
-----
["foo", "bar"]
{code}

Expected output dataset outputDS


{code:java}
value
-------
"foo" |
"bar" |

{code}

Tried explode function like below but it doesn't quite work


{code:java}
inputDS.select(explode(from_json(col("value"), ArrayType(StringType))))
{code}

and I get the following error


{code:java}
org.apache.spark.sql.AnalysisException: cannot resolve 'jsontostructs(`value`)' due to data
type mismatch: Input schema string must be a struct or an array of structs
{code}



  was:
{code:java}
val inputDS = Seq("""["foo", "bar"]""").toDF
{code}

inputDS.printSchema()

root
 |-- value: string (nullable = true)
Input Dataset inputDS

inputDS.show(false)

value
-----
["foo", "bar"]
Expected output dataset outputDS

value
-------
"foo" |
"bar" |

Tried explode function like below but it doesn't quite work

inputDS.select(explode(from_json(col("value"), ArrayType(StringType))))
and I get the following error

org.apache.spark.sql.AnalysisException: cannot resolve 'jsontostructs(`value`)' due to data
type mismatch: Input schema string must be a struct or an array of structs



> Add support for Array<primitive_type> so from_json can parse
> ------------------------------------------------------------
>
>                 Key: SPARK-22228
>                 URL: https://issues.apache.org/jira/browse/SPARK-22228
>             Project: Spark
>          Issue Type: Improvement
>          Components: Java API
>    Affects Versions: 2.2.0
>            Reporter: kant kodali
>
> {code:java}
> val inputDS = Seq("""["foo", "bar"]""").toDF
> {code}
> {code:java}
> inputDS.printSchema()
> root
>  |-- value: string (nullable = true)
> {code}
> Input Dataset inputDS
> {code:java}
> inputDS.show(false)
> value
> -----
> ["foo", "bar"]
> {code}
> Expected output dataset outputDS
> {code:java}
> value
> -------
> "foo" |
> "bar" |
> {code}
> Tried explode function like below but it doesn't quite work
> {code:java}
> inputDS.select(explode(from_json(col("value"), ArrayType(StringType))))
> {code}
> and I get the following error
> {code:java}
> org.apache.spark.sql.AnalysisException: cannot resolve 'jsontostructs(`value`)' due to
data type mismatch: Input schema string must be a struct or an array of structs
> {code}



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