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Posted to issues@spark.apache.org by "kant kodali (JIRA)" <ji...@apache.org> on 2017/10/09 18:48:00 UTC
[jira] [Updated] (SPARK-22228) Add support for
Array so from_json can parse
[ https://issues.apache.org/jira/browse/SPARK-22228?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
kant kodali updated SPARK-22228:
--------------------------------
Description:
`val inputDS = Seq("""["foo", "bar"]""").toDF`
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
was:
[val inputDS = Seq("""["foo", "bar"]""").toDF]
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
>
> `val inputDS = Seq("""["foo", "bar"]""").toDF`
> 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
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