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Python Relation <code>.limit()</code> does not give expected speedups

needs triage

Status: Open.

#247 In duckdb/duckdb-python;

· akdor1154 opened on Jan 3, 2026

Build failure: error: cannot ‘dynamic_cast’ ‘source’ (of type ‘const class duckdb::CatalogEntry*’) to type ‘const class duckdb::DuckTableEntry*’

needs triage

Status: Open.

#239 In duckdb/duckdb-python;

· inglesp opened on Dec 27, 2025

Parameterised queries run much more slowly than un-parameterised queries, even when there are no parameters

needs triage

Status: Open.

#238 In duckdb/duckdb-python;

· inglesp opened on Dec 26, 2025

Float parameter in WHERE clause unexpected mismatch

Status: Open.

#229 In duckdb/duckdb-python;

· mfellows opened on Dec 16, 2025

Arrow Pushdowns fail when *any* column is a string_view

needs triage

Status: Open.

#227 In duckdb/duckdb-python;

· paultiq opened on Dec 15, 2025

UDF Memory Leak

needs triage

Status: Open.

#224 In duckdb/duckdb-python;

· paultiq opened on Dec 13, 2025

duckdb.read_parquet(uploaded_file) doesn't accept filepath like duckdb.read_csv(uploaded_file) does

needs triage

Status: Open.

#216 In duckdb/duckdb-python;

· HeWhoHeWho opened on Dec 9, 2025

<code>StarExpression</code> has incorrect typing

stubs

Status: Open.

#210 In duckdb/duckdb-python;

· m15a opened on Dec 5, 2025

<code>DuckDBPyRelation.aggregate</code> has incorrect typing

stubs

Status: Open.

#209 In duckdb/duckdb-python;

· m15a opened on Dec 5, 2025

Segfaults when querying timestamptz outside of legal pandas range

Status: Open.

#208 In duckdb/duckdb-python;

· glentakahashi opened on Dec 4, 2025

[1.4.1 regression] In the downstream projects, running <code>mypy . --install-types</code> attempts to install <code>types-tensorflow</code>, even though <code>tensorflow</code> is unused and not installed

stubs

Status: Open.

#194 In duckdb/duckdb-python;

· alessio-locatelli opened on Nov 28, 2025

Union of DuckDB <code>DuckDBPyRelation</code>s based on Polars <code>DataFrame</code>s fails on internal error

needs triage

Status: Open.

#189 In duckdb/duckdb-python;

· Dutcho opened on Nov 23, 2025