Enum OnEmpty 

pub enum OnEmpty {
    Skip,
    OneRow,
}

Available on crate feature transform-cross-join only.

What to do when one of the crossed arrays is empty for a given record.

Variants

Skip

SQL CROSS JOIN semantics: an empty crossed array ⇒ the record produces zero rows.

OneRow

LEFT JOIN … ON true semantics: an empty crossed array contributes a single null element, so the record still produces a (null-filled) row.

Trait Implementations

impl Clone for OnEmpty

fn clone(&self) -> OnEmpty

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for OnEmpty

impl Debug for OnEmpty

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

Formats the value using the given formatter.

impl Default for OnEmpty

fn default() -> OnEmpty

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for OnEmpty

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for OnEmpty

impl JsonSchema for OnEmpty

fn schema_name() -> Cow<'static, str>

The name of the generated JSON Schema.

fn schema_id() -> Cow<'static, str>

Returns a string that uniquely identifies the schema produced by this type.

fn json_schema(generator: &mut SchemaGenerator) -> Schema

Generates a JSON Schema for this type.

fn inline_schema() -> bool

Whether JSON Schemas generated for this type should be included directly in parent schemas, rather than being re-used where possible using the $ref keyword.

impl PartialEq for OnEmpty

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for OnEmpty

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 OnEmpty