[jira] [Resolved] (ARROW-17627) [GO][Parquet] Unable to pass metadata without StoreSchema

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

     [ https://issues.apache.org/jira/browse/ARROW-17627?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Matthew Topol resolved ARROW-17627.
-----------------------------------
    Fix Version/s: 10.0.0
       Resolution: Fixed

Issue resolved by pull request 14087
[https://github.com/apache/arrow/pull/14087]

> [GO][Parquet] Unable to pass metadata without StoreSchema
> ---------------------------------------------------------
>
>                 Key: ARROW-17627
>                 URL: https://issues.apache.org/jira/browse/ARROW-17627
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: Go, Parquet
>    Affects Versions: 9.0.0
>            Reporter: Yan Zhou
>            Assignee: Matthew Topol
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 10.0.0
>
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> [https://github.com/apache/arrow/blob/master/go/parquet/pqarrow/file_writer.go#L75|https://github.com/apache/arrow/blob/master/go/parquet/pqarrow/file_writer.go#L75,]
>  
> Right now the only way to pass in KV metadata is to enable StoreSchema and pass it as part of the schema. In otherwise we can't pass through metadata without also store ARROW:schema
>  
> I suggest change it to the following
>  
> {code:go}
> 	meta := make(metadata.KeyValueMetadata, 0)
> 	for i := 0; i < arrschema.Metadata().Len(); i++ {
> 		meta.Append(arrschema.Metadata().Keys()[i], arrschema.Metadata().Values()[i])
> 	}
> 	if arrprops.storeSchema {
> 		serializedSchema := flight.SerializeSchema(arrschema, props.Allocator())
> 		meta.Append("ARROW:schema", base64.StdEncoding.EncodeToString(serializedSchema))
> 	}
> {code}
>  



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