Struct tc_btree::Column

pub struct Column {
    pub name: Id,
    pub dtype: ValueType,
    pub max_len: Option<usize>,
}

A Column used in the schema of a BTree.

Fields

name: Id

dtype: ValueType

max_len: Option<usize>

Implementations

impl Column

pub fn name(&self) -> &Id

Get the name of this column.

pub fn dtype(&self) -> ValueType

Get the Class of this column.

pub fn max_len(&self) -> &Option<usize>

Get the maximum size (in bytes) of this column.

Trait Implementations

impl Clone for Column

fn clone(&self) -> Column

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Column

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

Formats the value using the given formatter.

impl Display for Column

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

Formats the value using the given formatter.

impl<'a> From<&'a Column> for (&'a Id, ValueType)

fn from(col: &'a Column) -> (&'a Id, ValueType)

Converts to this type from the input type.

impl<I: Into<Id>> From<(I, NumberType)> for Column

fn from(column: (I, NumberType)) -> Column

Converts to this type from the input type.

impl From<(Id, ValueType, usize)> for Column

fn from(column: (Id, ValueType, usize)) -> Column

Converts to this type from the input type.

impl From<(Id, ValueType)> for Column

fn from(column: (Id, ValueType)) -> Column

Converts to this type from the input type.

impl From<Column> for Value

fn from(column: Column) -> Self

Converts to this type from the input type.

impl FromStream for Column

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>(
    __arg0: (),
    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<'en> IntoStream<'en> for Column

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<Column> for Column

fn eq(&self, other: &Column) -> 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<'en> ToStream<'en> for Column

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

Serialize this value into the given encoder.

impl TryCastFrom<Value> for Column

fn can_cast_from(value: &Value) -> bool

Test if value can be cast into Self.

fn opt_cast_from(value: Value) -> Option<Column>

Returns Some(Self) if the source value can be cast into Self, otherwise None.

fn try_cast_from<Err, OnErr>(value: T, on_err: OnErr) -> Result<Self, Err>where
    OnErr: FnOnce(&T) -> Err,

Returns Ok(Self) if the source value can be cast into Self, otherwise calls on_err.

impl Eq for Column

impl StructuralEq for Column

impl StructuralPartialEq for Column