[python] Support value stats with truncate mode by default#7701
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XiaoHongbo-Hope wants to merge 1 commit into
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[python] Support value stats with truncate mode by default#7701XiaoHongbo-Hope wants to merge 1 commit into
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JingsongLi
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May 14, 2026
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The binary column in Java does not generate min/max stats. If Java reads the manifest written in Python and pushes predicates down to the binary column, it may result in incorrect file skipping.
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Purpose
Python-written append tables have no value stats in data files, preventing predicate pushdown from skipping irrelevant files during upsert-by-key reads. This PR enables default value stats for append table pruning. A follow-up PR will use these stats in the
upsert_by_keylookup path.Skip us/ns/tz timestamps: _serialize_timestamp only supports ms precision (8-byte millis). Java's TIMESTAMP(4-9) uses a compound millis+nanos format that requires a different serialization path. Timezone is also not yet supported in serialization.
Tests