go/writer: add nanosecond timestamp and variant parquet types#4468
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jacobmarble wants to merge 2 commits into
Closed
go/writer: add nanosecond timestamp and variant parquet types#4468jacobmarble wants to merge 2 commits into
jacobmarble wants to merge 2 commits into
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Description:
Adds two new parquet logical types to
go/writerand matching opt-inProjectionToParquetSchemaElementoptions:LogicalTypeTimestampNanos/WithParquetTimestampAsNanosecondsLogicalTypeVariant/WithParquetSchemaObjectAsVariant,WithParquetSchemaArrayAsVariant(callers pass pre-encodedVariantValue{Value, Metadata []byte}; variant-binary encoding is the caller's responsibility)No caller invokes the new behavior yet. Existing connectors are unchanged until they explicitly pass the new options.
Helps #4462, #4466.
Workflow steps:
No connector behavior change; callers opt in via the new schema options.
Documentation links affected:
None.
Notes for reviewers:
flushBuffernow advancesNextColumn()twice for variant elements (group withvalue+metadatachildren).transferColumnValuesworks unchanged since it iterates by leaf-column count.