Lauri Koobas created SPARK-34993:
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Summary: 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
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:
```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')
```
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