Struct MapType 

pub struct MapType {
    pub type_name: String,
    pub key_type: DataType,
    pub value_type: DataType,
    pub value_contains_null: bool,
}

Fields

type_name: String

key_type: DataType

The type of element used for the key of this map

value_type: DataType

The type of element used for the value of this map

value_contains_null: bool

Denoting whether this map can contain one or more null values

Implementations

impl MapType

pub fn new( key_type: impl Into<DataType>, value_type: impl Into<DataType>, value_contains_null: bool, ) -> Self

pub const fn key_type(&self) -> &DataType

pub const fn value_type(&self) -> &DataType

pub const fn value_contains_null(&self) -> bool

pub fn as_struct_schema(&self, key_name: String, val_name: String) -> Schema

Create a schema assuming the map is stored as a struct with the specified key and value field names

Trait Implementations

impl Clone for MapType

fn clone(&self) -> MapType

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MapType

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for MapType

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl From<MapType> for DataType

fn from(map_type: MapType) -> Self

Converts to this type from the input type.

impl PartialEq for MapType

fn eq(&self, other: &MapType) -> 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 MapType

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl TryFromKernel<&MapType> for Field

Available on crate feature arrow-conversion and (crate features default-engine-native-tls or default-engine-rustls or arrow-conversion) only.

fn try_from_kernel(a: &MapType) -> Result<Self, ArrowError>

impl Eq for MapType

impl StructuralPartialEq for MapType