[jira] [Created] (ARROW-6737) Nested column branch had multiple children

["harikrishnan (Jira)" <ji...@apache.org>]

harikrishnan created ARROW-6737:
-----------------------------------

             Summary: Nested column branch had multiple children
                 Key: ARROW-6737
                 URL: https://issues.apache.org/jira/browse/ARROW-6737
             Project: Apache Arrow
          Issue Type: Bug
            Reporter: harikrishnan


```

 

{{from pyarrow import json}}

{{import pyarrow.parquet as pq}}

{{r = json.read_json('example.jl')}}

{{pq.write_table(r,'example.parquet')}}

```

Doing the above operation resulting in `{{ArrowInvalid: Nested column branch had multiple children}}`

Posting it here asper the request from https://github.com/apache/arrow/issues/4045#issuecomment-535867640

The sample schema looks like this

```

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```

 

 



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