Struct DataType

pub struct DataType {
    pub type_name: i32,
    pub precision: u32,
    pub scale: u32,
    pub is_nullable: bool,
    pub interval_type: i32,
    pub field_type: Vec<DataType>,
    pub field_names: Vec<String>,
    pub field_ids: Vec<i32>,
}

Fields

type_name: i32

precision: u32

Data length for char. Max data length for varchar. Precision for time, decimal.

scale: u32

Scale for decimal.

is_nullable: bool

interval_type: i32

field_type: Vec<DataType>

For struct type, it represents all the fields in the struct. For list type it only contains 1 element which is the inner item type of the List. For example, ARRAY<INTEGER> will be represented as vec!\[DataType::Int32\].

field_names: Vec<String>

Name of the fields if it is a struct type. For other types it will be empty.

field_ids: Vec<i32>

Id of the fields if it is a struct type. Used in serialization for nested-schema evolution purposes.

Empty if either:

• it is not a struct type
• it is not within a table schema (ColumnDesc)
• it was persisted in an old version.

Implementations

impl DataType

pub fn type_name(&self) -> TypeName

Returns the enum value of type_name, or the default if the field is set to an invalid enum value.

pub fn set_type_name(&mut self, value: TypeName)

Sets type_name to the provided enum value.

pub fn interval_type(&self) -> IntervalType

Returns the enum value of interval_type, or the default if the field is set to an invalid enum value.

pub fn set_interval_type(&mut self, value: IntervalType)

Sets interval_type to the provided enum value.

impl DataType

pub fn get_type_name(&self) -> Result<TypeName, PbFieldNotFound>

pub fn get_precision(&self) -> u32

pub fn get_scale(&self) -> u32

pub fn get_is_nullable(&self) -> bool

pub fn get_interval_type(&self) -> Result<IntervalType, PbFieldNotFound>

pub fn get_field_type(&self) -> &Vec<DataType>

pub fn get_field_names(&self) -> &Vec<String>

pub fn get_field_ids(&self) -> &Vec<i32>

Trait Implementations

impl Clone for DataType

fn clone(&self) -> DataType

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for DataType

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

Formats the value using the given formatter.

impl Default for DataType

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for DataType

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Hash for DataType

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 Message for DataType

fn encoded_len(&self) -> usize

Returns the encoded length of the message without a length delimiter.

fn clear(&mut self)

Clears the message, resetting all fields to their default.

fn encode(&self, buf: &mut impl BufMut) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message to a buffer.

fn encode_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message to a newly allocated buffer.

fn encode_length_delimited( &self, buf: &mut impl BufMut, ) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message with a length-delimiter to a buffer.

fn encode_length_delimited_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message with a length-delimiter to a newly allocated buffer.

fn decode(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes an instance of the message from a buffer.

fn decode_length_delimited(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes a length-delimited instance of the message from the buffer.

fn merge(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes an instance of the message from a buffer, and merges it into self.

fn merge_length_delimited(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes a length-delimited instance of the message from buffer, and merges it into self.

impl PartialEq for DataType

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

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

where S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for DataType

impl StructuralPartialEq for DataType