Struct ZoneMapEntry 

pub struct ZoneMapEntry {
    pub min: Option<Value>,
    pub max: Option<Value>,
    pub null_count: u64,
    pub row_count: u64,
    pub bloom_filter: Option<BloomFilter>,
}

Statistics for a single chunk of property data.

The query optimizer uses these to skip chunks that can’t match a predicate. For example, if max < 30 and the predicate is value > 50, skip the chunk.

Fields

min: Option<Value>

Minimum value in the chunk (None if all nulls).

max: Option<Value>

Maximum value in the chunk (None if all nulls).

null_count: u64

Number of null values in the chunk.

row_count: u64

Total number of values in the chunk.

bloom_filter: Option<BloomFilter>

Optional Bloom filter for equality checks.

Implementations

impl ZoneMapEntry

pub fn new() -> Self

Creates a new empty zone map entry.

pub fn with_min_max( min: Value, max: Value, null_count: u64, row_count: u64, ) -> Self

Creates a zone map entry with min/max.

pub fn with_bloom_filter(self, filter: BloomFilter) -> Self

Sets the Bloom filter.

pub fn might_contain_equal(&self, value: &Value) -> bool

Checks if this chunk might contain values matching an equality predicate.

Returns true if the chunk might contain matches, false if it definitely doesn’t.

pub fn might_contain_less_than(&self, value: &Value, inclusive: bool) -> bool

Checks if this chunk might contain values matching a less-than predicate.

Returns true if the chunk might contain matches, false if it definitely doesn’t.

pub fn might_contain_greater_than(&self, value: &Value, inclusive: bool) -> bool

Checks if this chunk might contain values matching a greater-than predicate.

Returns true if the chunk might contain matches, false if it definitely doesn’t.

pub fn might_contain_range( &self, lower: Option<&Value>, upper: Option<&Value>, lower_inclusive: bool, upper_inclusive: bool, ) -> bool

Checks if this chunk might contain values in a range.

pub fn might_contain_non_null(&self) -> bool

Checks if this chunk might contain non-null values.

pub fn is_all_null(&self) -> bool

Checks if this chunk contains only null values.

pub fn null_fraction(&self) -> f64

Returns the null fraction.

Trait Implementations

impl Clone for ZoneMapEntry

fn clone(&self) -> ZoneMapEntry

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ZoneMapEntry

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

Formats the value using the given formatter.

impl Default for ZoneMapEntry

fn default() -> Self

Returns the “default value” for a type.