Enum SampleUnit 

pub enum SampleUnit {
    Count,
    Rows,
    Percent,
    PercentSign,
}

The size unit of a SampleClause.

Four spellings kept as data so the surface round-trips: a bare count (3), the explicit 3 ROWS, and the two percentage spellings 50 PERCENT and 50% — distinct surfaces DuckDB accepts for the same percentage.

Variants

Count

A bare row count with no unit keyword, as in USING SAMPLE 3.

Rows

An explicit ROWS count, as in USING SAMPLE 3 ROWS.

Percent

A PERCENT-keyword percentage, as in USING SAMPLE 10 PERCENT.

PercentSign

A %-sign percentage, as in USING SAMPLE 10%.

Trait Implementations

impl Clone for SampleUnit

fn clone(&self) -> SampleUnit

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for SampleUnit

impl Debug for SampleUnit

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for SampleUnit

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for SampleUnit

impl Hash for SampleUnit

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for SampleUnit

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

Equality operator ==.

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

Inequality operator !=.

impl Render for SampleUnit

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

Return the render for this value.

fn operand_binding_power(&self) -> Option<BindingPower>

The binding power this node contributes when it appears as an operand, or None (the default) for a self-delimiting node — an atom, call, or constructor — that never needs parentheses.

impl Serialize for SampleUnit

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 SampleUnit