emkornfield commented on code in PR #542:
URL: https://github.com/apache/parquet-format/pull/542#discussion_r2637249271
##########
src/main/thrift/parquet.thrift:
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@@ -958,6 +958,22 @@ union ColumnCryptoMetaData {
struct ColumnChunk {
/** File where column data is stored. If not set, assumed to be same file as
* metadata. This path is relative to the current file.
+ *
+ * As of December 2025, the only known use-case for this field is writing
summary
+ * parquet files (i.e. "_metadata" files). These files consolidate footers
from
Review Comment:
I don't think this was ever officially part of the parquet specification as
far as I can tell.
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