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https://issues.apache.org/jira/browse/SPARK-34993?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Lauri Koobas updated SPARK-34993:
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Attachment: image-2021-04-13-12-07-26-391.png
> from_json() acts differently on created and literal strings with backslashes
> ----------------------------------------------------------------------------
>
> Key: SPARK-34993
> URL: https://issues.apache.org/jira/browse/SPARK-34993
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.1.1
> Environment: Databricks DBR 8.1
> Reporter: Lauri Koobas
> Priority: Major
> Attachments: image-2021-04-11-07-21-02-750.png,
> image-2021-04-13-12-07-26-391.png
>
>
> JSON string with the value that contains backslashes fails to be recovered by
> `from_json()`.
> I found that if the same string is created with `to_json(named_struct())`
> then it actually does work.
>
> The following code to reproduce. I would expect all of these methods to
> return the same (correct) result:
> {code:java}
> select to_json(named_struct('msg', '\\'))
> , schema_of_json(to_json(named_struct('msg', '\\')))
> , from_json(to_json(named_struct('msg', '\\')),
> schema_of_json(to_json(named_struct('msg', '\\'))))
> , from_json('{"msg":"\\"}', schema_of_json(to_json(named_struct('msg',
> '\\'))))
> , from_json('{"msg":"\\"}', 'msg string')
>
> {code}
>
> !image-2021-04-11-07-21-02-750.png!
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