*Unreleased*

With approximate indexes, queries with filtering can return less results (due to post-filtering). Starting with 0.8.0, you can enable iterative index scans. If too few results from the initial scan match the filters, the scan will resume until enough results are found (or it reaches`hnsw.max_scan_tuples` or`ivfflat.max_probes`). This can significantly improve recall.

With approximate indexes, queries with filtering can return less results (due to post-filtering). Starting with 0.8.0, you can enable iterative index scans. If too few results from the initial scan match the filters, the scan will resume until enough results are found (or it reaches`hnsw.max_scan_tuples` or`ivfflat.max_probes`).

There are two modes for iterative scans: strict and relaxed.

Since scanning a large portion of an approximate index is expensive, there are options to control when a scan ends

Since scanning a large portion of an approximate index is expensive, there are options to control when a scan ends.