wgtmac commented on code in PR #245: URL: https://github.com/apache/parquet-format/pull/245#discussion_r1606818965
########## PageIndex.md: ########## @@ -17,11 +17,13 @@ - under the License. --> -# ColumnIndex Layout to Support Page Skipping +# Parquet page index: Layout to Support Page Skipping -This document describes the format for column index pages in the Parquet -footer. These pages contain statistics for DataPages and can be used to skip -pages when scanning data in ordered and unordered columns. +In Parquet, a *page index* is optional metadata for a +ColumnChunk, containing statistics for DataPages that can be used +to skip those pages when scanning in ordered and unordered columns. Review Comment: Yes, ColumnIndex will not be created when there is no valid min/max statistics. In parquet-cpp, we can also disable creating ColumnIndex but enabling OffsetIndex. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
