File fac

File Extension: .fac (Columnar Forward Facet Bitset Index)

Turkce Dokumantasyon | English Documentation

Category: File Formats & Storage
Location: dbstore/tables/${table_id}_${block_idx}.fac
Format: Columnar Fixed-Width Forward Index Bitset Array

---

1. Definition and Overview

The .fac file stores columnar forward attribute values mapped directly by Record ID offset. Together with string dictionaries (_${block_idx}.unq / _${block_idx}.str), it enables instantaneous disjunctive (OR) facet menu count aggregations.

---

2. Structure

Record ID Offset:  [0..3]     [4..7]     [8..11] ...
Value / Dict ID:   [Dict ID]  [Dict ID]  [Dict ID] ...

---

3. See Also

• Concept: Disjunctive Faceting
• Method: facet_menu
• Method: field_fltkeys