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fix: respect inexact flags in row group metadata - #16412
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alamb merged 3 commits intoAug 18, 2025
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Hi @alamb, this pr tried to extract the exactness flags in row group metadata, could you please take a look :) |
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bf10479Compare| /// The value `0` appears at indices `[0, 2, 4]`. The corresponding exactness | ||
| /// values are `[true, false, false]`. Since at least one is `true`, the | ||
| /// function returns `Some(true)`. | ||
| fn has_any_exact_match( |
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Updated a unit test with 4 possible scenarios. Also use a struct to make clippy happy, PTAL :)
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Thank you, this is a good finding and nice fix!
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alamb
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Thank you @xudong963 and @CookiePieWw |
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* Revert "Upgrade arrow/parquet to 56.0.0 (apache#16690)" This reverts commit fa1f8c1. * Revert "refactor: use upstream inline_key_fast (apache#17044)" This reverts commit 71b92bc. * Revert "fix: respect inexact flags in row group metadata (apache#16412)" This reverts commit afc90f7. * Revert "Test grouping by FixedSizeList (apache#17415)" This reverts commit 03f39e5. * Spelling (got reverted) * Also allow Byt from tests * Adjust sqllogictests
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Which issue does this PR close?
Rationale for this change
Currently, datafusion will treat all max and min values in column stats as exact, while some of them may be inexact.
What changes are included in this PR?
For each row group, when max or min value is calculated, retrieve its corresponding exactness flag. The final max or min value's exactness represents the final exactness flag. Wrap the max and min stats with
InexactorExactbased on the final exactness flagAre these changes tested?
Are there any user-facing changes?
Now datafusion will correctly report the exactness of column max and min values.