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DuckDB: redundant DISTINCT in UNION, INTERSECT, and EXCEPT branches is not eliminated

needs triage

Status: Open.

#24151 In duckdb/duckdb;

· chen8908917 opened on Jul 25, 2026

Parquet LIST type doesn't leverage bloom filter to prune row group

needs triage

Status: Open.

#24149 In duckdb/duckdb;

· dentiny opened on Jul 25, 2026

Add REFUTE scientific critique + calibration benchmark

Status: Open.

#24147 In duckdb/duckdb;

· connerlambden opened on Jul 24, 2026

DuckDB: redundant HAVING COUNT(*) > 0 prevents an empty aggregate branch from collapsing the complete join plan

needs triage

Status: Open.

#24144 In duckdb/duckdb;

· chen8908917 opened on Jul 24, 2026

DuckDB: redundant DISTINCT on a primary-key IN subquery causes a large performance regression

needs triage

Status: Open.

#24143 In duckdb/duckdb;

· chen8908917 opened on Jul 24, 2026

DuckDB: IN subquery can be faster with an explicit redundant DISTINCT on a highly duplicated build side

needs triage

Status: Open.

#24142 In duckdb/duckdb;

· chen8908917 opened on Jul 24, 2026

DuckDB: redundant double negation prevents contradictory aggregate predicates from producing an EMPTY_RESULT plan

needs triage

Status: Open.

#24141 In duckdb/duckdb;

· chen8908917 opened on Jul 24, 2026

UNION with empty branch does redundant distinct work

needs triage

Status: Open.

#24118 In duckdb/duckdb;

· dentiny opened on Jul 24, 2026

Grouped HAVING count(*) = 0 scans everything

needs triage

Status: Open.

#24116 In duckdb/duckdb;

· dentiny opened on Jul 24, 2026

IS NOT DISTINCT FROM misses single-column ART index

needs triage

Status: Open.

#24115 In duckdb/duckdb;

· dentiny opened on Jul 24, 2026

Constant Aggregate sum(1) Scans Table

needs triage

Status: Open.

#24114 In duckdb/duckdb;

· dentiny opened on Jul 24, 2026

NOT IN (SELECT NULL) not folded

needs triage

Status: Open.

#24113 In duckdb/duckdb;

· dentiny opened on Jul 24, 2026