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ArrayDesc

Struct ArrayDesc 

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pub struct ArrayDesc {
    pub relation: String,
    pub field: String,
    pub blr_type: u8,
    pub sub_type: i32,
    pub scale: i32,
    pub length: u16,
    pub dimensions: Vec<Dimension>,
}
Expand description

Descreve uma coluna ARRAY: o tipo do elemento e as dimensões. Obtido por Connection::array_desc; consumido por Connection::read_array / Connection::write_array para montar a SDL.

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§relation: String

Nome da relação (tabela), como armazenado (normalmente em maiúsculas).

§field: String

Nome do campo (coluna), como armazenado.

§blr_type: u8

Tipo BLR do elemento (= RDB$FIELD_TYPE; ex.: 37 = VARYING, 8 = LONG).

§sub_type: i32

Sub-tipo (charset para texto: 1 = OCTETS; sub-tipo de blob, etc.).

§scale: i32

Escala (para NUMERIC/DECIMAL e inteiros escalados).

§length: u16

Comprimento do elemento em bytes (largura declarada do tipo).

§dimensions: Vec<Dimension>

Limites de cada dimensão, da mais externa para a mais interna.

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impl ArrayDesc

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pub fn element_count(&self) -> usize

Número total de elementos (produto dos tamanhos de todas as dimensões).

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pub fn to_sdl(&self) -> Vec<u8>

Gera a SDL que descreve a fatia inteira deste array. Reproduz o algoritmo gen_sdl do fbclient (verificado byte a byte contra uma captura de isc_array_get_slice em JOB.LANGUAGE_REQ).

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impl Clone for ArrayDesc

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fn clone(&self) -> ArrayDesc

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 Debug for ArrayDesc

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

Formats the value using the given formatter. Read more

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Blanket Implementations§

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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<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> 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> 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