Struct QueryMetadata 

pub struct QueryMetadata {
    pub execution_time: Duration,
    pub rows_returned: usize,
    pub total_rows_available: Option<usize>,
    pub from_cache: bool,
    pub source_files: Vec<PathBuf>,
    pub bytes_read: u64,
    pub cache_hit_ratio: f64,
}

Query execution metadata

Fields

execution_time: Duration

Total execution time

rows_returned: usize

Number of rows returned

total_rows_available: Option<usize>

Total rows available (before limit)

from_cache: bool

Whether result was cached

source_files: Vec<PathBuf>

Source SSTable files accessed

bytes_read: u64

Data size read in bytes

cache_hit_ratio: f64

Cache hit ratio for this query

Trait Implementations

impl Clone for QueryMetadata

fn clone(&self) -> QueryMetadata

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for QueryMetadata

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for QueryMetadata

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for QueryMetadata

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

where __S: Serializer,

Serialize this value into the given Serde serializer.