[−][src]Struct parquet_format::ColumnIndex
Description for ColumnIndex.
Each
Fields
null_pages: Vec<bool>
A list of Boolean values to determine the validity of the corresponding min and max values. If true, a page contains only null values, and writers have to set the corresponding entries in min_values and max_values to byte[0], so that all lists have the same length. If false, the corresponding entries in min_values and max_values must be valid.
min_values: Vec<Vec<u8>>
Two lists containing lower and upper bounds for the values of each page. These may be the actual minimum and maximum values found on a page, but can also be (more compact) values that do not exist on a page. For example, instead of storing ""Blart Versenwald III", a writer may set min_values[i]="B", max_values[i]="C". Such more compact values must still be valid values within the column's logical type. Readers must make sure that list entries are populated before using them by inspecting null_pages.
max_values: Vec<Vec<u8>>
boundary_order: BoundaryOrder
Stores whether both min_values and max_values are orderd and if so, in which direction. This allows readers to perform binary searches in both lists. Readers cannot assume that max_values[i] <= min_values[i+1], even if the lists are ordered.
null_counts: Option<Vec<i64>>
A list containing the number of null values for each page *
Implementations
impl ColumnIndex
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pub fn new<F5>(
null_pages: Vec<bool>,
min_values: Vec<Vec<u8>>,
max_values: Vec<Vec<u8>>,
boundary_order: BoundaryOrder,
null_counts: F5
) -> ColumnIndex where
F5: Into<Option<Vec<i64>>>,
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null_pages: Vec<bool>,
min_values: Vec<Vec<u8>>,
max_values: Vec<Vec<u8>>,
boundary_order: BoundaryOrder,
null_counts: F5
) -> ColumnIndex where
F5: Into<Option<Vec<i64>>>,
pub fn read_from_in_protocol(
i_prot: &mut dyn TInputProtocol
) -> Result<ColumnIndex>
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i_prot: &mut dyn TInputProtocol
) -> Result<ColumnIndex>
pub fn write_to_out_protocol(
&self,
o_prot: &mut dyn TOutputProtocol
) -> Result<()>
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&self,
o_prot: &mut dyn TOutputProtocol
) -> Result<()>
Trait Implementations
impl Clone for ColumnIndex
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pub fn clone(&self) -> ColumnIndex
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pub fn clone_from(&mut self, source: &Self)
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impl Debug for ColumnIndex
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impl Eq for ColumnIndex
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impl Hash for ColumnIndex
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pub fn hash<__H: Hasher>(&self, state: &mut __H)
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pub fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
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H: Hasher,
impl Ord for ColumnIndex
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pub fn cmp(&self, other: &ColumnIndex) -> Ordering
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#[must_use]pub fn max(self, other: Self) -> Self
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#[must_use]pub fn min(self, other: Self) -> Self
1.21.0[src]
#[must_use]pub fn clamp(self, min: Self, max: Self) -> Self
1.50.0[src]
impl PartialEq<ColumnIndex> for ColumnIndex
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pub fn eq(&self, other: &ColumnIndex) -> bool
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pub fn ne(&self, other: &ColumnIndex) -> bool
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impl PartialOrd<ColumnIndex> for ColumnIndex
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pub fn partial_cmp(&self, other: &ColumnIndex) -> Option<Ordering>
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pub fn lt(&self, other: &ColumnIndex) -> bool
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pub fn le(&self, other: &ColumnIndex) -> bool
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pub fn gt(&self, other: &ColumnIndex) -> bool
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pub fn ge(&self, other: &ColumnIndex) -> bool
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impl StructuralEq for ColumnIndex
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impl StructuralPartialEq for ColumnIndex
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Auto Trait Implementations
impl RefUnwindSafe for ColumnIndex
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impl Send for ColumnIndex
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impl Sync for ColumnIndex
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impl Unpin for ColumnIndex
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impl UnwindSafe for ColumnIndex
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Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
pub fn borrow_mut(&mut self) -> &mut T
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
pub fn to_owned(&self) -> T
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pub fn clone_into(&self, target: &mut T)
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impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,