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https://issues.apache.org/jira/browse/DRILL-7631?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17055299#comment-17055299
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ASF GitHub Bot commented on DRILL-7631:
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paul-rogers commented on pull request #2016: DRILL-7631: Updates to the Json
Structure Parser
URL: https://github.com/apache/drill/pull/2016
# [DRILL-7631](https://issues.apache.org/jira/browse/DRILL-7631): Updates to
the Json Structure Parser
## Description
The JSON structure parser converts JSON tokens from the Jackson JSON parser
into a structure consisting of values, arrays and objects. The structure parser
handles the JSON aspects. An associated set of listeners converts JSON values
to some other format (such as to vectors via the column writers.) This PR
covers only the structure parser.
Work to create a new JSON record reader using this parser revealed several
required revisions:
* Convert the various typed listener creation calls in the listener to a
generic call that takes a `ValueDef` value description.
* Add support to replace listeners as is needed when starting with an
"unknown" field, which later resolves to some type, such as `Integer`.
* Reorganized the code to build sub-parsers based on incoming JSON structure.
Note that, at present, no code uses the JSON structure parser. That code
will come in a later PR.
## Documentation
None
## Testing
Expanded an reran the associated unit tests. Moved the unit tests so that
they are in the same package as the code.
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> Updates to the Json Structure Parser
> ------------------------------------
>
> Key: DRILL-7631
> URL: https://issues.apache.org/jira/browse/DRILL-7631
> Project: Apache Drill
> Issue Type: Improvement
> Affects Versions: 1.17.0
> Reporter: Paul Rogers
> Assignee: Paul Rogers
> Priority: Minor
> Fix For: 1.18.0
>
>
> Updates to the JSON structure parser based on using it to create a revised
> JSON record reader.
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