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

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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), it enables instantaneous disjunctive (OR) facet menu count aggregations.

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2. Binary Layout

Record ID Offset:  [0..3]      [4..7]      [8..11] ...
Dictionary Val ID: [Val ID]    [Val ID]    [Val ID] ...

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3. See Also

• Concept: Disjunctive Faceting
• Method: facet_menu
• Method: field_fltkeys
• File: .unq (Dictionary Index)