Tag
selectivity
- Nov 18, 2025 Selectivity Estimation from Histograms and Most-Common-Value Lists How a single-column statistic turns a predicate into a row count, why equidepth buckets are chosen over equiwidth, and where the estimate fails for correlated columns. databases
- Aug 15, 2023 Metadata Filtering Inside a Vector Index and the Selectivity Collapse Why post-filtering silently returns fewer results than requested, how pre-filtering degrades graph traversal, and what the filter selectivity threshold does to each index family. information retrieval