ArrayMetadata

Struct ArrayMetadata 

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pub struct ArrayMetadata {
    pub pointer: String,
    pub length: usize,
    pub column_names: Vec<String>,
    pub is_uniform: bool,
}
Expand description

Extract table metadata for fast array operations during schema parsing

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§pointer: String

Pointer to the array location

§length: usize

Array length (cached for fast bounds checking)

§column_names: Vec<String>

Column names for object arrays (cached for fast field access)

§is_uniform: bool

Whether this is a uniform object array (all elements have same structure)

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impl ArrayMetadata

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pub fn build(data: &Value, pointer: &str) -> Option<Self>

Build metadata for an array at the given pointer

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pub fn get_column_value<'a>( &self, data: &'a Value, row_index: usize, column: &str, ) -> Option<&'a Value>

Fast column access for uniform object arrays

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pub fn is_valid_index(&self, index: usize) -> bool

Fast bounds checking

Trait Implementations§

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impl Clone for ArrayMetadata

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fn clone(&self) -> ArrayMetadata

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for ArrayMetadata

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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<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> 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.