Struct tablam::schema::Schema

pub struct Schema {
    pub pk: Option<usize>,
    pub fields: Vec<Field>,
}

Fields

pk: Option<usize>

fields: Vec<Field>

Implementations

impl Schema

pub fn new(fields: Vec<Field>, pk: Option<usize>) -> Self

pub fn new_single(name: &str, kind: DataType) -> Self

pub fn scalar_field(kind: DataType) -> Self

pub fn named(&self, name: &str) -> Option<(usize, &Field)>

pub fn len(&self) -> usize

pub fn is_empty(&self) -> bool

pub fn pk_field(&self) -> Option<Field>

pub fn resolve_name(&self, of: &Column) -> (usize, Field)

pub fn resolve_pos(&self, of: &Column) -> usize

Recover the column position from the relative ColumnName

pub fn resolve_pos_many(&self, of: &[Column]) -> Pos

pub fn pick_new_pk(&mut self, old: Option<Field>)

pub fn extend(&self, right: &Schema) -> Self

pub fn project(&self, select: &ProjectDef) -> (Schema, Pos)

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

Trait Implementations

impl Clone for Schema

fn clone(&self) -> Schema

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Schema

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

Formats the value using the given formatter.

impl Display for Schema

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

Formats the value using the given formatter.

impl Eq for Schema

impl Hash for Schema

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, 

Feeds a slice of this type into the given Hasher.

impl Index<usize> for Schema

type Output = Field

The returned type after indexing.

fn index(&self, pos: usize) -> &Field

Performs the indexing (container[index]) operation.

impl Ord for Schema

fn cmp(&self, other: &Schema) -> Ordering

This method returns an Ordering between self and other.

#[must_use]fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

#[must_use]fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

#[must_use]fn clamp(self, min: Self, max: Self) -> Self

🔬 This is a nightly-only experimental API. (clamp)

Restrict a value to a certain interval.

impl PartialEq<Schema> for Schema

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

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

#[must_use]fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl PartialOrd<Schema> for Schema

fn partial_cmp(&self, other: &Schema) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Schema) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Schema) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Schema) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Schema) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.