Struct SSTableStatistics 

pub struct SSTableStatistics {
    pub header: StatisticsHeader,
    pub row_stats: RowStatistics,
    pub timestamp_stats: TimestampStatistics,
    pub column_stats: Vec<ColumnStatistics>,
    pub table_stats: Option<TableStatistics>,
    pub partition_stats: Option<PartitionStatistics>,
    pub compression_stats: Option<CompressionStatistics>,
    pub metadata: HashMap<String, String>,
    pub serialization_header_columns: Vec<ColumnInfo>,
    pub serialization_header_partition_keys: Vec<ColumnInfo>,
    pub serialization_header_clustering_keys: Vec<ColumnInfo>,
    pub tombstone_drop_times: Vec<(i64, u64)>,
}

Comprehensive SSTable statistics extracted from Statistics.db

Fields

header: StatisticsHeader

Header information

row_stats: RowStatistics

Row count statistics

timestamp_stats: TimestampStatistics

Timestamp range information

column_stats: Vec<ColumnStatistics>

Column-level statistics

table_stats: Option<TableStatistics>

Table-level aggregated statistics, or None when NOT authoritatively parsed from Statistics.db (issue #1653). The enhanced (nb) parser does not decode these table-level metrics, so it is honestly None rather than a fabricated all-zero TableStatistics; the legacy parser populates Some(..).

partition_stats: Option<PartitionStatistics>

Partition size distribution, or None when NOT authoritatively parsed from Statistics.db (issue #1653 — the enhanced parser previously fabricated an all-zero PartitionStatistics).

compression_stats: Option<CompressionStatistics>

Compression statistics, or None when NOT authoritatively parsed from Statistics.db (issue #1653 — the enhanced parser previously fabricated a CompressionStatistics with algorithm: "unknown" and all-zero metrics).

metadata: HashMap<String, String>

Additional metadata

serialization_header_columns: Vec<ColumnInfo>

SerializationHeader columns (Issue #163)

Column definitions parsed from SerializationHeader embedded in nb-format Statistics.db files. Used for schema extraction in V5CompressedLegacy format. Empty if SerializationHeader not found in Statistics.db.

serialization_header_partition_keys: Vec<ColumnInfo>

Partition key definitions extracted from SerializationHeader (Issue #195)

serialization_header_clustering_keys: Vec<ColumnInfo>

Clustering key definitions extracted from SerializationHeader (Issue #195)

tombstone_drop_times: Vec<(i64, u64)>

Estimated tombstone-drop-times histogram as (point, count) pairs, decoded best-effort from the STATS component (Issue #1073). Empty when the SSTable carries no tombstones or the histogram could not be decoded.

Trait Implementations

impl Clone for SSTableStatistics

fn clone(&self) -> SSTableStatistics

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for SSTableStatistics

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for SSTableStatistics

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for SSTableStatistics

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.