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new 4099a671c7 Puffin: Document stats `ndv` value representation (#10793)
4099a671c7 is described below
commit 4099a671c73d0017845a3d821e5c171190fc8c99
Author: Piotr Findeisen <[email protected]>
AuthorDate: Thu Oct 3 12:49:41 2024 +0200
Puffin: Document stats `ndv` value representation (#10793)
---
format/puffin-spec.md | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/format/puffin-spec.md b/format/puffin-spec.md
index 1fe9e5b9bc..7b4e3e6d96 100644
--- a/format/puffin-spec.md
+++ b/format/puffin-spec.md
@@ -121,7 +121,9 @@ distinct values converted to bytes using Iceberg's
single-value serialization.
The blob metadata for this blob may include following properties:
-- `ndv`: estimate of number of distinct values, derived from the sketch.
+- `ndv`: estimate of number of distinct values, derived from the sketch,
+ stored as non-negative integer value represented using decimal digits
+ with no leading or trailing spaces.
### Compression codecs
