Struct parquet::arrow::arrow_reader::ArrowReaderOptions

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pub struct ArrowReaderOptions { /* private fields */ }
Expand description

Options that control how metadata is read for a parquet file

See ArrowReaderBuilder for how to configure how the column data is then read from the file, including projection and filter pushdown

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impl ArrowReaderOptions

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pub fn new() -> Self

Create a new ArrowReaderOptions with the default settings

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pub fn with_skip_arrow_metadata(self, skip_arrow_metadata: bool) -> Self

Parquet files generated by some writers may contain embedded arrow schema and metadata. This may not be correct or compatible with your system.

For example:ARROW-16184

Set skip_arrow_metadata to true, to skip decoding this

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pub fn with_page_index(self, page_index: bool) -> Self

Set this true to enable decoding of the PageIndex if present. This can be used to push down predicates to the parquet scan, potentially eliminating unnecessary IO

Trait Implementations§

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impl Clone for ArrowReaderOptions

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fn clone(&self) -> ArrowReaderOptions

Returns a copy 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 ArrowReaderOptions

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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 Default for ArrowReaderOptions

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fn default() -> ArrowReaderOptions

Returns the “default value” for a type. Read more

Auto Trait 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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default unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. 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.
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impl<V, T> VZip<V> for T
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fn vzip(self) -> V

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impl<T> Allocation for T
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