pitrou commented on code in PR #242:
URL: https://github.com/apache/parquet-format/pull/242#discussion_r1603918729
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src/main/thrift/parquet.thrift:
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@@ -1165,6 +1317,62 @@ struct FileMetaData {
9: optional binary footer_signing_key_metadata
}
+/** Metadata for a column in this file. */
+struct FileColumnMetadataV3 {
+ /** All column chunks in this file (one per row group) **/
+ 1: required list<ColumnChunkV3> columns
Review Comment:
I agree that a Parquet designed from scratch would perhaps store most of its
metadata using regular data columns and encodings (just like databases do). But
evolving from the existing Parquet format is a slightly different problem. The
more the new format structures deviate from the legacy ones, the more work we
will have to implement it and the more pains we will suffer.
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