[v25.3.x] iceberg: Push Parquest column stats to Iceberg manifests#30776
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vbotbuildovich wants to merge 2 commits into
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[v25.3.x] iceberg: Push Parquest column stats to Iceberg manifests#30776vbotbuildovich wants to merge 2 commits into
vbotbuildovich wants to merge 2 commits into
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Thread per-column stats (min/max bounds, null counts, value counts, column sizes) through to the Iceberg data_file manifest entry, where query engines use them for column-level predicate pushdown. Maintain a file-level column_stats_collector in buffered_column_writer that accumulates by merging after each flush_pages(), then use the result after the file is done to get file-level stats. (cherry picked from commit 7f83353)
(cherry picked from commit b4e8232)
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Backport of PR #30704
Conflict details
base/format_to.h,bytes/bytes.h,container/chunked_vector.h,serde/envelope.h,serde/rw/bytes.h) needed by the newper_column_statsstruct.base_typeslibrary deps (//src/v/base,//src/v/bytes,//src/v/container:chunked_vector,//src/v/serde,//src/v/serde:bytes).//src/v/basedep and added the incoming//src/v/bytesdep foriceberg_file_committer.file_value_count,file_column_size_bytes); the surrounding bloom-filter block in the incoming context does not exist on v25.3.x and was omitted (bloom filters are not present on the target branch).build_statisticshelper was adapted to the target's non-truncated form (encode_for_stats(...),is_exact=true). Replaced per-pagerecord_value()calls with the commit's_flushed_stats.merge(_current_page_stats), added the new_file_statscollector andfile_column_stats()accumulation, and omitted the_bloom_filtermember (bloom filters absent on target).The second commit (b4e8232, ducktape test) applied cleanly.