Struct ColumnBlock 

pub struct ColumnBlock {
    pub cumulative_docs: u32,
    pub num_docs: u32,
    pub data: OwnedBytes,
    pub offset_data: OwnedBytes,
    pub value_data: OwnedBytes,
    pub dict: Option<TextDictReader>,
    pub raw_dict: OwnedBytes,
}

One independently-decodable block within a blocked column.

All byte slices are zero-copy borrows from the mmap’d .fast file.

Fields

cumulative_docs: u32

Number of docs before this block (for doc_id → block lookup).

num_docs: u32

Number of docs in this block.

data: OwnedBytes

Auto-codec encoded data for this block (single-value or raw multi-value region).

offset_data: OwnedBytes

For multi-value blocks: offset sub-column.

value_data: OwnedBytes

For multi-value blocks: value sub-column.

dict: Option<TextDictReader>

Per-block text dictionary (text columns only). Lazy — offsets built on first access.

raw_dict: OwnedBytes

Raw dictionary bytes for this block (for merge: memcpy).