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https://issues.apache.org/jira/browse/SPARK-46761?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hyukjin Kwon reassigned SPARK-46761:
------------------------------------
Assignee: Robert Joseph Evans
> quoted strings in a JSON path should support ? characters
> ---------------------------------------------------------
>
> Key: SPARK-46761
> URL: https://issues.apache.org/jira/browse/SPARK-46761
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.0.0, 4.0.0
> Reporter: Robert Joseph Evans
> Assignee: Robert Joseph Evans
> Priority: Major
> Labels: pull-request-available
>
> I think this impacts all versions of Spark after SPARK-18677, which made the
> operator work at all in 2.1.0/2.0.3
> I comes down to
> {code:java}
> name <- '.' ~> "[^\\.\\[]+".r | "['" ~> "[^\\'\\?]+".r <~ "']"{code}
> [https://github.com/apache/spark/blob/01bb1b1a3dbfc68f41d9b13de863d26d587c7e2f/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/jsonExpressions.scala#L79]
>
> The regular expression/pattern is saying that we want a [' followed by one or
> more characters that are not a single quote ' or a question mark ? followed
> by ']. That question mark looks out of place. When I try to put in a question
> mark in a quoted string it fails to produce any result, but when I put the
> same data/path into [https://jsonpath.com/] I get a result
>
> data
> {code:java}
> {"?":"QUESTION"} {code}
> path
> {code:java}
> $['?'] {code}
>
> I also see no tests validating that a question mark is not allowed so I
> suspect that it is a long standing bug.
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