ColumnId

risingwave_common::catalog

Struct ColumnId

pub struct ColumnId(i32);

Expand description

Column ID is the unique identifier of a column in a table. Different from table ID, column ID is not globally unique.

Tuple Fields§

§0: i32

Implementations§

impl ColumnId

pub const fn new(column_id: i32) -> Self

pub const fn placeholder() -> Self

Sometimes the id field is filled later, we use this value for better debugging.

pub const fn first_user_column() -> Self

impl ColumnId

pub const fn get_id(&self) -> i32

pub const fn next(self) -> Self

Returns the subsequent column id.

pub fn apply_delta_if_not_row_id(&mut self, delta: i32)

Trait Implementations§

impl Clone for ColumnId

fn clone(&self) -> ColumnId

Returns a duplicate of the value. Read more

1.0.0 · Source§

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

Performs copy-assignment from source. Read more

impl Debug for ColumnId

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

Formats the value using the given formatter. Read more

impl Display for ColumnId

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

Formats the value using the given formatter. Read more

impl From<&ColumnId> for i32

fn from(id: &ColumnId) -> i32

Converts to this type from the input type.

impl From<&i32> for ColumnId

fn from(column_id: &i32) -> Self

Converts to this type from the input type.

impl From<ColumnId> for i32

fn from(id: ColumnId) -> i32

Converts to this type from the input type.

impl From<i32> for ColumnId

fn from(column_id: i32) -> Self

Converts to this type from the input type.

impl Hash for ColumnId

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher. Read more

1.3.0 · Source§

fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more

impl Ord for ColumnId

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

This method returns an Ordering between self and other. Read more

1.21.0 · Source§

fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more

1.21.0 · Source§

fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more

1.50.0 · Source§

fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized,

Restrict a value to a certain interval. Read more

impl PartialEq for ColumnId

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

Tests for self and other values to be equal, and is used by ==.

1.0.0 · Source§

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 PartialOrd for ColumnId

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

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

1.0.0 · Source§

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

Tests less than (for self and other) and is used by the < operator. Read more

1.0.0 · Source§

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

Tests less than or equal to (for self and other) and is used by the <= operator. Read more

1.0.0 · Source§

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

Tests greater than (for self and other) and is used by the > operator. Read more

1.0.0 · Source§

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

Tests greater than or equal to (for self and other) and is used by the >= operator. Read more

impl Copy for ColumnId

impl Eq for ColumnId

impl StructuralPartialEq for ColumnId

Auto Trait Implementations§

impl Freeze for ColumnId

impl RefUnwindSafe for ColumnId

impl Send for ColumnId

impl Sync for ColumnId

impl Unpin for ColumnId

impl UnwindSafe for ColumnId

Blanket Implementations§

impl<T> Any for T
where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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Immutably borrows from an owned value. Read more

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

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

Performs copy-assignment from self to dest. Read more

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fn compare(&self, key: &K) -> Ordering

Compare self to key and return their ordering.

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Compare self to key and return true if they are equal.

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fn equivalent(&self, key: &K) -> bool

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fn relabel_debug_1( self, relabel_threshold: MetricLevel, ) -> RelabeledMetricVec<M>

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