Struct ColumnMetadata

pub struct ColumnMetadata {
    pub column_schema: ColumnSchema,
    pub semantic_type: SemanticType,
    pub column_id: ColumnId,
}

Metadata of a column.

Fields

column_schema: ColumnSchema

Schema of this column. Is the same as column_schema in SchemaRef.

semantic_type: SemanticType

Semantic type of this column (e.g. tag or timestamp).

column_id: ColumnId

Immutable and unique id of a region.

Implementations

impl ColumnMetadata

pub fn try_from_column_def(column_def: RegionColumnDef) -> Result<Self>

Construct Self from protobuf struct [RegionColumnDef]

pub fn encode_list(columns: &[Self]) -> Result<Vec<u8>>

Encodes a vector of ColumnMetadata into a JSON byte vector.

pub fn decode_list(bytes: &[u8]) -> Result<Vec<Self>>

Decodes a JSON byte vector into a vector of ColumnMetadata.

pub fn is_same_datatype(&self, other: &Self) -> bool

Trait Implementations

impl Clone for ColumnMetadata

fn clone(&self) -> ColumnMetadata

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ColumnMetadata

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ColumnMetadata

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for ColumnMetadata

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

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 ColumnMetadata

impl StructuralPartialEq for ColumnMetadata