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ColumnKind

questdb::egress::column_kind

Enum ColumnKind 

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#[non_exhaustive]
#[repr(u8)]
pub enum ColumnKind {

Show 23 variants    Boolean = 1,
    Byte = 2,
    Short = 3,
    Int = 4,
    Long = 5,
    Float = 6,
    Double = 7,
    Symbol = 9,
    Timestamp = 10,
    Date = 11,
    Uuid = 12,
    Long256 = 13,
    Geohash = 14,
    Varchar = 15,
    TimestampNanos = 16,
    DoubleArray = 17,
    LongArray = 18,
    Decimal64 = 19,
    Decimal128 = 20,
    Decimal256 = 21,
    Char = 22,
    Binary = 23,
    Ipv4 = 24,

}
Expand description

QWP wire type code.

#[non_exhaustive] because the QWP type table is append-only — new type codes may be added in future protocol revisions, and exhaustive matches in downstream code shouldn’t break when that happens.

Variants (Non-exhaustive)§

This enum is marked as non-exhaustive
Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.
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Boolean = 1

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Byte = 2

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Short = 3

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Int = 4

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Long = 5

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Float = 6

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Double = 7

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Symbol = 9

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Timestamp = 10

Microsecond-precision timestamp.

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Date = 11

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Uuid = 12

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Long256 = 13

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Geohash = 14

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Varchar = 15

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TimestampNanos = 16

Nanosecond-precision timestamp.

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DoubleArray = 17

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LongArray = 18

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Decimal64 = 19

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Decimal128 = 20

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Decimal256 = 21

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Char = 22

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Binary = 23

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Ipv4 = 24

Implementations§

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impl ColumnKind

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pub fn from_u8(byte: u8) -> Result<Self>

Parse a wire byte into a known column kind.

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pub fn as_u8(self) -> u8

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pub fn name(self) -> &'static str

Stable, lower-case name for diagnostics.

Trait Implementations§

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impl Clone for ColumnKind

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fn clone(&self) -> ColumnKind

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more
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impl Copy for ColumnKind

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impl Debug for ColumnKind

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

Formats the value using the given formatter. Read more
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impl Eq for ColumnKind

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impl Hash for ColumnKind

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

Feeds this value into the given Hasher. Read more
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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
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impl PartialEq for ColumnKind

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

Equality operator ==. Read more
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fn ne(&self, other: &Rhs) -> bool

Inequality operator !=. Read more
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impl StructuralPartialEq for ColumnKind

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impl TryFrom<ColumnKind> for SimpleNullKind

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fn try_from(k: ColumnKind) -> Result<Self, Self::Error>

Returns the input kind in Err when it’s not a simple-null kind, so the caller can build a context-rich error message pointing at the dedicated variant the user needed.

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type Error = ColumnKind

The type returned in the event of a conversion error.

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Allocation for T
where T: RefUnwindSafe + Send + Sync,

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<'a, T, E> AsTaggedExplicit<'a, E> for T
where T: 'a,

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fn explicit(self, class: Class, tag: u32) -> TaggedParser<'a, Explicit, Self, E>

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impl<'a, T, E> AsTaggedImplicit<'a, E> for T
where T: 'a,

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fn implicit( self, class: Class, constructed: bool, tag: u32, ) -> TaggedParser<'a, Implicit, Self, E>

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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<ST, DT> CastableFrom<ST, Initialized, Initialized> for DT
where ST: ?Sized, DT: ?Sized,

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impl<ST, DT> CastableFrom<ST, Uninit, Uninit> for DT
where ST: ?Sized, DT: ?Sized,

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impl<T> CloneToUninit for T
where T: Clone,

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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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impl<T> DynClone for T
where T: Clone,

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fn __clone_box(&self, _: Private) -> *mut ()

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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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

Checks if this value is equivalent to the given key. Read more
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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

Compare self to key and return true if they are equal.
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self> ⓘ

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self> ⓘ
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> Key for T
where T: Clone,

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fn align() -> usize

The alignment necessary for the key. Must return a power of two.
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fn size(&self) -> usize

The size of the key in bytes.
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unsafe fn init(&self, ptr: *mut u8)

Initialize the key in the given memory location. Read more
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unsafe fn get<'a>(ptr: *const u8) -> &'a T

Get a reference to the key from the given memory location. Read more
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unsafe fn drop_in_place(ptr: *mut u8)

Drop the key in place. Read more
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impl<T> Pointable for T

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const ALIGN: usize

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T> Read<Exclusive, BecauseExclusive> for T
where T: ?Sized,

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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V