tamnd Open Source Projects | Good First Issue

One TPC-H query is refused, and it stops in one place Open

area/plan area/sql enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

tamnd/firepanda#816 · 8 comments · Opened Sep 15, 2026

A fourth word on Buffer costs half a megabyte of code Open

area/kernel performance

Difficulty 5/5 Over a week Newbie friendliness 48/100

tamnd/firepanda#811 · Opened Sep 15, 2026

The type differential does not compare 12 MAP return types, because SqlType carries one element and a map needs two Open

area/sql enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

tamnd/firepanda#780 · 3 comments · Opened Sep 14, 2026

A filter under a sort under a limit should not build the frame in the middle Open

area/plan performance

Difficulty 4/5 3-5 days Newbie friendliness 52/100

tamnd/firepanda#682 · 3 comments · Opened Sep 12, 2026

A series name that can be absent rather than empty Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

tamnd/firepanda#599 · Opened Sep 11, 2026

M2b.1: Selection vectors, so a filter stops copying Open

area/exec area/kernel enhancement milestone performance

Difficulty 4/5 3-5 days Newbie friendliness 52/100

tamnd/firepanda#521 · 12 comments · Opened Sep 11, 2026

A4. `DatetimeIndex`, 144 members, L3 90 percent Open

Difficulty 4/5 3-5 days Newbie friendliness 52/100

tamnd/firepanda#495 · Opened Sep 11, 2026

M6b: ClickBench readiness Open

area/benchmark area/frame area/string milestone performance

Difficulty 5/5 Over a week Newbie friendliness 35/100

tamnd/firepanda#477 · 35 comments · Opened Sep 11, 2026

A category column can only hold text, so astype("category") on numbers refuses Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

tamnd/firepanda#450 · Opened Sep 10, 2026

A series with no name reports an empty string where pandas reports None Open

Difficulty 5/5 Over a week Newbie friendliness 45/100

tamnd/firepanda#435 · Opened Sep 10, 2026

A categorical has no type object, so there is no way to say the categories and the order at once Open

Difficulty 5/5 Over a week Newbie friendliness 45/100

tamnd/firepanda#433 · 2 comments · Opened Sep 10, 2026

The Parquet read holds two copies of the table, and that is where the peak is Open

area/arrow area/io performance

Difficulty 4/5 3-5 days Newbie friendliness 48/100

tamnd/firepanda#427 · 4 comments · Opened Sep 10, 2026

Six raises carry the wrong kind, so the except clause around them does not fire Open

Difficulty 3/5 1-2 days Newbie friendliness 76/100

tamnd/firepanda#410 · 1 comment · Opened Sep 10, 2026

Peak RSS is 2x polars and has not moved Open

area/exec area/streaming performance

Difficulty 5/5 Over a week Newbie friendliness 45/100

tamnd/firepanda#405 · 6 comments · Opened Sep 10, 2026

astype resolves longdouble differently from pandas on x86 Open

area/python bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

tamnd/firepanda#403 · Opened Sep 10, 2026

The extension segfaults on import into a free threaded interpreter Open

area/python bug ci toolchain

Difficulty 4/5 3-5 days Newbie friendliness 48/100

tamnd/firepanda#400 · Opened Sep 10, 2026

M2c.5: The physical operators the plan needs and exec does not have Open

area/exec area/plan milestone

Difficulty 4/5 3-5 days Newbie friendliness 58/100

tamnd/firepanda#380 · Opened Sep 10, 2026

M2c.4: Join ordering, and the estimates we refuse to build Open

area/plan milestone performance

Difficulty 4/5 3-5 days Newbie friendliness 45/100

tamnd/firepanda#379 · Opened Sep 10, 2026

M2c.3: Predicate transfer and runtime join filters Open

area/hash area/plan milestone performance

Difficulty 5/5 Over a week Newbie friendliness 35/100

tamnd/firepanda#378 · Opened Sep 10, 2026

M2c.2: The optimizer pass pipeline Open

area/plan milestone performance

Difficulty 5/5 Over a week Newbie friendliness 35/100

tamnd/firepanda#377 · 10 comments · Opened Sep 10, 2026

M2c.1: The plan layer, the IR and binding Open

area/exec area/plan milestone

Difficulty 5/5 Over a week Newbie friendliness 38/100

tamnd/firepanda#376 · 3 comments · Opened Sep 10, 2026

M2c.0: Stage zero, the decisions that need no plan Open

area/frame area/hash milestone performance

Difficulty 5/5 Over a week Newbie friendliness 35/100

tamnd/firepanda#375 · 4 comments · Opened Sep 10, 2026

M2c: The planner Open

area/exec area/plan milestone performance

Difficulty 5/5 Over a week Newbie friendliness 25/100

tamnd/firepanda#372 · 5 comments · Opened Sep 10, 2026

The Mojo 1.0 compiler hangs on a recursive expression transformer Open

area/sql toolchain upstream

Difficulty 4/5 3-5 days Newbie friendliness 48/100

tamnd/firepanda#369 · Opened Sep 10, 2026

to_datetime answers a Series where pandas answers a DatetimeIndex Open

Difficulty 1/5 Under an hour Newbie friendliness 68/100

tamnd/firepanda#354 · 1 comment · Opened Sep 9, 2026

to_datetime on a column that is neither text nor whole numbers Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

tamnd/firepanda#353 · Opened Sep 9, 2026

One dt accessor where pandas has two, and the error a caller sees for it Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

tamnd/firepanda#350 · Opened Sep 9, 2026

The dt arguments that are declared and refused, and the zone database behind half of them Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

tamnd/firepanda#349 · Opened Sep 9, 2026

tolist on a temporal column gives the stored integer rather than a datetime Open

Difficulty 4/5 3-5 days Newbie friendliness 68/100

tamnd/firepanda#348 · Opened Sep 9, 2026

The five dt names that are absent because the column type is Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

tamnd/firepanda#347 · Opened Sep 9, 2026

The groupby surface has sixteen callables with proven behaviour and no Python door Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

tamnd/firepanda#341 · Opened Sep 9, 2026

inplace and ignore_index, decided once for the whole surface Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

tamnd/firepanda#340 · Opened Sep 9, 2026

The six transformation arguments that need something the core does not have Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

tamnd/firepanda#339 · Opened Sep 9, 2026

skipna=False and numeric_only on the cumulative scans Open

Difficulty 4/5 3-5 days Newbie friendliness 65/100

tamnd/firepanda#338 · Opened Sep 9, 2026

A frame transformation over axis=1 Open

Difficulty 5/5 Over a week Newbie friendliness 45/100

tamnd/firepanda#337 · Opened Sep 9, 2026

The transformation family, which is the same door problem as the reductions Open

Difficulty 5/5 Over a week Newbie friendliness 45/100

tamnd/firepanda#334 · 3 comments · Opened Sep 9, 2026

The five reductions pandas has and AggKind does not Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

tamnd/firepanda#333 · Opened Sep 9, 2026

The reduction arguments that are declared and refused Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

tamnd/firepanda#332 · Opened Sep 9, 2026

Series.corr and Series.cov need a second column and index alignment Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

tamnd/firepanda#331 · Opened Sep 9, 2026

Five keyword arguments the Python binding does not take Open

Difficulty 5/5 Over a week Newbie friendliness 38/100

tamnd/firepanda#329 · Opened Sep 9, 2026

S8. Memory, spilling and ADBC Open

area/arrow area/sql area/streaming performance

Difficulty 5/5 Over a week Newbie friendliness 18/100

tamnd/firepanda#313 · Opened Sep 8, 2026

S7. The front doors Open

area/python area/sql enhancement security

Difficulty 5/5 Over a week Newbie friendliness 18/100

tamnd/firepanda#312 · Opened Sep 8, 2026

S6. The optimizer Open

area/plan area/sql performance

Difficulty 5/5 Over a week Newbie friendliness 20/100

tamnd/firepanda#311 · Opened Sep 8, 2026

S5. The full SELECT surface, and the first conformance number Open

area/exec area/plan area/sql enhancement test

Difficulty 5/5 Over a week Newbie friendliness 20/100

tamnd/firepanda#310 · Opened Sep 8, 2026

S4. The logical plan and the first executions Open

area/exec area/plan area/sql enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

tamnd/firepanda#309 · 84 comments · Opened Sep 8, 2026

S3. The binder, the catalog, the types and the tier one functions Open

area/dtype area/sql enhancement test

Difficulty 5/5 Over a week Newbie friendliness 18/100

tamnd/firepanda#308 · 5 comments · Opened Sep 8, 2026

S2. The AST, the transformer and the refusal table Open

area/sql enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

tamnd/firepanda#307 · 6 comments · Opened Sep 8, 2026

S1. The tokenizer and the PEG matcher Open

area/sql enhancement performance test

Difficulty 5/5 Over a week Newbie friendliness 25/100

tamnd/firepanda#306 · Opened Sep 8, 2026

M4b: SQL, the DuckDB dialect Open

area/plan area/sql enhancement milestone spec

Difficulty 5/5 Over a week Newbie friendliness 25/100

tamnd/firepanda#304 · 131 comments · Opened Sep 8, 2026

The constructor door: a None and a NaN, after the read path was decided Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

tamnd/firepanda#301 · Opened Sep 8, 2026

tamnd

Get new issues in your inbox