Struct tc_collection::table::TableSchema

pub struct TableSchema { /* private fields */ }

The schema of a table

Implementations

impl TableSchema

pub fn try_cast_from_value(value: Value) -> TCResult<Self>

Try to construct a TableSchema from its Value representation.

pub fn columns(&self) -> impl Iterator<Item = &Id>

Construct an iterator over the [Id]s of the columns in this TableSchema.

pub fn len(&self) -> usize

Return the number of columns in this TableSchema.

Trait Implementations

impl AsType<TableSchema> for Schema

fn as_type(&self) -> Option<&TableSchema>

Borrow this instance as an instance of T if possible.

fn as_type_mut(&mut self) -> Option<&mut TableSchema>

Borrow this instance mutably as an instance of T if possible.

fn into_type(self) -> Option<TableSchema>

Convert this instance into an instance of T if possible.

impl CastFrom<TableSchema> for Value

fn cast_from(schema: TableSchema) -> Self

Cast an instance of T into an instance of Self.

impl Clone for TableSchema

fn clone(&self) -> TableSchema

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for TableSchema

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

Formats the value using the given formatter.

impl From<TableSchema> for Schema

fn from(t: TableSchema) -> Self

Converts to this type from the input type.

impl FromStream for TableSchema

type Context = ()

The decoding context of this type, useful in situations where the stream to be decoded may be too large to hold in main memory.

fn from_stream<'life0, 'async_trait, D>( cxt: (), decoder: &'life0 mut D ) -> Pin<Box<dyn Future<Output = Result<Self, D::Error>> + Send + 'async_trait>>

where D: 'async_trait + Decoder, Self: 'async_trait, 'life0: 'async_trait,

Parse this value using the given Decoder.

impl<'a, D: Digest> Hash<D> for &'a TableSchema

fn hash(self) -> Output<D>

Compute the SHA-2 hash of this value

impl<'en> IntoStream<'en> for TableSchema

fn into_stream<E: Encoder<'en>>(self, encoder: E) -> Result<E::Ok, E::Error>

Take ownership of this value and serialize it into the given encoder.

impl PartialEq for TableSchema

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Schema for TableSchema

type Id = Id

The type of human-readable identifier used by columns and indices in this Schema

type Error = TCError

The type of validation error used by this Schema

type Value = Value

The type of column value used by a [Table] with this Schema

type Index = BTreeSchema

The type of schema used by the indices which compose a [Table] with this Schema

fn key(&self) -> &[Self::Id]

Borrow the names of the columns in the primary key.

fn values(&self) -> &[Self::Id]

Borrow the names of the value columns.

fn primary(&self) -> &Self::Index

Borrow the schema of the primary index.

fn auxiliary(&self) -> &[(String, Self::Index)]

Borrow the schemata of the auxiliary indices. This is ordered so that the first index which matches a given Range will be used.

fn validate_key( &self, key: Vec<Self::Value> ) -> Result<Vec<Self::Value>, Self::Error>

Check that the given key is a valid primary key for a [Table] with this Schema.

fn validate_values( &self, values: Vec<Self::Value> ) -> Result<Vec<Self::Value>, Self::Error>

Check that the given values are valid for a row in a [Table] with this Schema.

impl Eq for TableSchema

impl StructuralPartialEq for TableSchema