[GO][Parquet] Unable to pass metadata without StoreSchema

[asfimport]

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

 

	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))
	}

 

Reporter: Yan Zhou
Assignee: Matthew Topol / @zeroshade

PRs and other links:

• GitHub Pull Request #14087

_{Note: This issue was originally created as ARROW-17627. Please see the migration documentation for further details.}

[asfimport]

Matthew Topol / @zeroshade:
Hey [~zhouyan1014] thanks for the proposal. This looks solid to me, would you be interested in making a PR for it? (and adding a test in the PR?)

Otherwise, I'll try to get around to adding this when I have a chance.

[asfimport]

Matthew Topol / @zeroshade:
Issue resolved by pull request 14087
#14087