Jackie Zhang created SPARK-38094:
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Summary: Parquet: enable matching schema columns by field id
Key: SPARK-38094
URL: https://issues.apache.org/jira/browse/SPARK-38094
Project: Spark
Issue Type: New Feature
Components: Spark Core
Affects Versions: 3.3
Reporter: Jackie Zhang
Field Id is a native field in the Parquet schema
([https://github.com/apache/parquet-format/blob/master/src/main/thrift/parquet.thrift#L398])
After this PR, when the requested schema has field IDs, Parquet readers will
first use the field ID to determine which Parquet columns to read, before
falling back to using column names as before. It enables matching columns by
field id for supported DWs like iceberg and Delta.
This PR supports:
* OSS vectorized reader
does not support:
* Parquet-mr reader due to lack of field id support (needs a follow up ticket)
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