Struct TableSample 

pub struct TableSample {
    pub method: SampleMethod,
    pub size: SampleSize,
    pub seed: Option<i64>,
}

Table sampling configuration.

Fields

method: SampleMethod

Sampling method.

size: SampleSize

Sample size (percentage or rows).

seed: Option<i64>

Optional seed for reproducibility.

Implementations

impl TableSample

pub fn percent(percent: f64) -> TableSampleBuilder

Create a percentage sample using BERNOULLI.

pub fn rows(count: usize) -> TableSampleBuilder

Create a row count sample.

pub fn to_postgres_sql(&self) -> String

Generate PostgreSQL TABLESAMPLE clause.

pub fn to_mssql_sql(&self) -> String

Generate MSSQL TABLESAMPLE clause.

pub fn to_sql(&self, db_type: DatabaseType) -> QueryResult<String>

Generate SQL for database type.

Trait Implementations

impl Clone for TableSample

fn clone(&self) -> TableSample

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TableSample

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for TableSample

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for TableSample

fn eq(&self, other: &TableSample) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for TableSample

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for TableSample