Mask-based nullable columns for CTable - #694

Merged

FrancescAlted merged 48 commits into

mainfrom

mask-based-nulls

Aug 11, 2026

Commits on Aug 8, 2026

Add NullChannel and make string predicates null-aware (mask-based-nulls 0-1)

FrancescAlted
and
claude
committed
2db28c8
Let schema specs declare where their nulls live (mask-based-nulls 2)

FrancescAlted
and
claude
committed
fc47108
Pin the negation corner in both query forms (mask-based-nulls follow-up)

FrancescAlted
and
claude
committed
fbea7c3
Give mask columns a place to keep their nulls (mask-based-nulls 3)

FrancescAlted
and
claude
committed
182352d
Make mask columns readable and writable (mask-based-nulls 4)

FrancescAlted
and
claude
committed
800022c
Stop reducing mask columns over their fill (mask-based-nulls 5)

FrancescAlted
and
claude
committed
6a26836
Round-trip Arrow and Parquet losslessly (mask-based-nulls 6)

FrancescAlted
and
claude
committed
3660f35
Sort, group and query mask columns by their nulls (mask-based-nulls 7)

FrancescAlted
and
claude
committed
d783b00
Let columns migrate between null channels (mask-based-nulls 8)

FrancescAlted
and
claude
committed
3c6d1f3
Make a validity sidecar the default (mask-based-nulls 9)

FrancescAlted
and
claude
committed
ec1bd76
Summarise indexes over the rows that carry a value (mask-based-nulls 10)

FrancescAlted
and
claude
committed
89a7c92
Say plainly what an older reader sees for a version-3 table

FrancescAlted
and
claude
committed
8f608cd
Target 4.11.0, not 4.10.2

FrancescAlted
and
claude
committed
1dbd2a1
Give the NaT in the timestamp test a unit

FrancescAlted
and
claude
committed
febc3cd
Stop re-reading every groupby column once per row

FrancescAlted
and
claude
committed
d2f586e
Let the null-storage suites run on NumPy 1.x

FrancescAlted
and
claude
committed
f7f5079

Commits on Aug 9, 2026

Keep an empty text cell apart from a missing one in CSV

FrancescAlted
and
claude
committed
6c04dca
Stop losing text and nulls on the way through CSV and extend()

FrancescAlted
and
claude
committed
4250613
Let add_column say a row has no value

FrancescAlted
and
claude
committed
e92982b
Check the two null storages against each other

FrancescAlted
and
claude
committed
f1f120c
Stop isin() matching what stands in for a null

FrancescAlted
and
claude
committed
8c217a7
Send nulls to pandas as NA

FrancescAlted
and
claude
committed
c53a76f
Let cov() see a mask column's nulls

FrancescAlted
and
claude
committed
71db305
Skip the Arrow equivalence cases when pyarrow is absent

FrancescAlted
and
claude
committed
cb65171

Commits on Aug 10, 2026

Give a null predicate its third value

FrancescAlted
and
claude
committed
4dbeede
Fix the two defects a post-landing review turned up

FrancescAlted
and
claude
committed
2115044
Let the Kleene suite run on NumPy 1.x too

FrancescAlted
and
claude
committed
6e719c8
Stop convert_nulls() flattening a nested column

FrancescAlted
and
claude
committed
beabc9c
Reverse a descending sort by complement, not by negation

FrancescAlted
and
claude
committed
d2c57db
Read a mask column's nulls in the order its values arrive

FrancescAlted
and
claude
committed
934ca99
Stop reading an injected validity guard as a user's negation

FrancescAlted
and
claude
committed
d5d9a6e
Write and read CSV as UTF-8, not as the locale's codec

FrancescAlted
and
claude
committed
598400a
Keep a struct column nested across save and reopen

FrancescAlted
and
claude
committed
506104e
Let a timestamp column be written through col[key] = value

FrancescAlted
and
claude
committed
eb06caa
Record the review fixes in the release notes and the plan

FrancescAlted
and
claude
committed
80d00b1
Read a hole-free sidecar as a slice, not as a fancy index

FrancescAlted
and
claude
committed
eb3c230
Let a CSV's encoding be named rather than only defaulted

FrancescAlted
and
claude
committed
51a30f2
Note that a null broadcasts like any other value

FrancescAlted
and
claude
committed
e29e77e
Translate nullity when extending from another table

FrancescAlted
and
claude
committed
3612d97
Answer a dictionary column's nulls per live row, and pandas' per value

FrancescAlted
and
claude
committed
2e6fc81
Record that a bool ndarray column was widened to uint8

FrancescAlted
and
claude
committed
08c3fb3
Show a null as None in a row, not as the fill

FrancescAlted
and
claude
committed
a5ddae9
Record the second round of review findings

FrancescAlted
and
claude
committed
50bce2b
Stop a memory-scaling assertion failing on unrelated allocations

FrancescAlted
and
claude
committed
f707af8
Merge remote-tracking branch 'origin/main' into mask-based-nulls
FrancescAlted
committed
4ccc71b
Wait for dim mode instead of asserting it instantly

FrancescAlted
and
claude
committed
fc76b49
Derive the fill-list bound from the pointer size, and skip it on WASM

FrancescAlted
and
claude
committed
15e5574
Wait for a Textual screen instead of pausing a fixed number of times

FrancescAlted
and
claude
committed
d742399