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https://issues.apache.org/jira/browse/ARROW-6737?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16941683#comment-16941683
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Joris Van den Bossche commented on ARROW-6737:
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[~harish1792] would you be able to provide a reproducible example? (so we can
run the code and investigate the issue)
For example, a small json file that shows the problem?
> Nested column branch had multiple children
> ------------------------------------------
>
> Key: ARROW-6737
> URL: https://issues.apache.org/jira/browse/ARROW-6737
> Project: Apache Arrow
> Issue Type: Bug
> Components: Python
> Reporter: harikrishnan
> Priority: Major
>
> {code}
> from pyarrow import json
> import pyarrow.parquet as pq
> r = json.read_json('example.jl')
> pq.write_table(r, 'example.parquet')
> {code}
> Doing the above operation resulting in {{ArrowInvalid: Nested column branch
> had multiple children}}
> Posting it here as per the request from
> https://github.com/apache/arrow/issues/4045#issuecomment-535867640
> The sample schema looks like this
> {code}
> package_version: string
> source_version: string
> uuid: string
> _type: string
> position: struct<ais_type: string, course: double, draught: double,
> draught_raw: null, heading: double, lat: double, lon: double, nav_state:
> int64, received_time: timestamp[s], speed: double>
> child 0, ais_type: string
> child 1, course: double
> child 2, draught: double
> child 3, draught_raw: null
> child 4, heading: double
> child 5, lat: double
> child 6, lon: double
> child 7, nav_state: int64
> child 8, received_time: timestamp[s]
> child 9, speed: double
> provider_name: string
> vessel: struct<beam: null, build_year: null, call_sign: string, dead_weight:
> null, dwt: null, flag_code: null, flag_name: string, gross_tonnage: null,
> imo: string, length: null, mmsi: string, name: string, type: null,
> vessel_type: string>
> child 0, beam: null
> child 1, build_year: null
> child 2, call_sign: string
> child 3, dead_weight: null
> child 4, dwt: null
> child 5, flag_code: null
> child 6, flag_name: string
> child 7, gross_tonnage: null
> child 8, imo: string
> child 9, length: null
> child 10, mmsi: string
> child 11, name: string
> child 12, type: null
> child 13, vessel_type: string
> source_provider: string
> {code}
>
>
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