Struct parquet::file::page_index::index::PageIndex

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pub struct PageIndex<T> {
    pub min: Option<T>,
    pub max: Option<T>,
    pub null_count: Option<i64>,
}
Expand description

PageIndex Statistics for one data page, as described in Column Index.

One significant difference from the row group level Statistics is that page level statistics may not store actual column values as min and max (e.g. they may store truncated strings to save space)

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§min: Option<T>

The minimum value, It is None when all values are null

§max: Option<T>

The maximum value, It is None when all values are null

§null_count: Option<i64>

Null values in the page

Implementations§

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impl<T> PageIndex<T>

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pub fn min(&self) -> Option<&T>

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pub fn max(&self) -> Option<&T>

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pub fn null_count(&self) -> Option<i64>

Trait Implementations§

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impl<T: Clone> Clone for PageIndex<T>

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fn clone(&self) -> PageIndex<T>

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<T: Debug> Debug for PageIndex<T>

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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<T: Hash> Hash for PageIndex<T>

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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<T: PartialEq> PartialEq for PageIndex<T>

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fn eq(&self, other: &PageIndex<T>) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<T: Eq> Eq for PageIndex<T>

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impl<T> StructuralPartialEq for PageIndex<T>

Auto Trait Implementations§

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impl<T> Freeze for PageIndex<T>
where T: Freeze,

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impl<T> RefUnwindSafe for PageIndex<T>
where T: RefUnwindSafe,

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impl<T> Send for PageIndex<T>
where T: Send,

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impl<T> Sync for PageIndex<T>
where T: Sync,

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impl<T> Unpin for PageIndex<T>
where T: Unpin,

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impl<T> UnwindSafe for PageIndex<T>
where T: UnwindSafe,

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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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<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<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
where V: MultiLane<T>,

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fn vzip(self) -> V

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