Struct Mapping 

pub struct Mapping {
    pub mapping_type: MappingType,
    pub extra: BTreeMap<String, GenericValue>,
    pub map_values: Option<MappingType>,
    pub decimal: bool,
    pub enum_order: Option<Vec<String>>,
}

OpenSearch mapping. mapping_type is required; all other properties are passed through as-is.

Fields

mapping_type: MappingType

extra: BTreeMap<String, GenericValue>

map_values: Option<MappingType>

For a map field (a dynamic-key object), the mapping type of every value; None for every other field. Internal metadata only — it is not serialized into the index body (a map carries just {"type":"object","dynamic":true}, the latter via extra). It exists so a consumer turning the mapping into typed bindings can tell a map from a plain object and offer a value-kind-typed handle.

decimal: bool

Whether this numeric field came from a FlussoType::Decimal — a PG numeric/decimal. It maps to OpenSearch double like a true double, so mapping_type alone can’t tell them apart. Internal metadata only — not serialized into the index body. It lets a consumer turning the mapping into typed bindings offer a Decimal-kind handle (exact) instead of an f64-kind one.

enum_order: Option<Vec<String>>

For an Enum field with a declared order, its variants in rank order; None for a bare enum or any other field. The OpenSearch sink turns it into a .sort subfield (a per-field normalizer remapping each variant to a zero-padded rank) so the field sorts by declared order rather than alphabetically; a consumer building typed bindings uses it to offer an order-aware sort handle. Internal metadata — the enum itself is still serialized as a plain keyword.

Trait Implementations

impl Clone for Mapping

fn clone(&self) -> Mapping

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Mapping

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

Formats the value using the given formatter.

impl Hash for Mapping

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 Serialize for Mapping

Serializes the way OpenSearch expects a field mapping — { "type": …, …extra } — rather than the struct’s two named fields. The extra settings sit beside type, exactly as they would in the index body.

fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error>

Serialize this value into the given Serde serializer.