Enum parquet::data_type::Decimal

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pub enum Decimal {
    Int32 {
        value: [u8; 4],
        precision: i32,
        scale: i32,
    },
    Int64 {
        value: [u8; 8],
        precision: i32,
        scale: i32,
    },
    Bytes {
        value: ByteArray,
        precision: i32,
        scale: i32,
    },
}
Expand description

Rust representation for Decimal values.

This is not a representation of Parquet physical type, but rather a wrapper for DECIMAL logical type, and serves as container for raw parts of decimal values: unscaled value in bytes, precision and scale.

Variants§

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Int32

Decimal backed by i32.

Fields

§value: [u8; 4]
§precision: i32
§scale: i32
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Int64

Decimal backed by i64.

Fields

§value: [u8; 8]
§precision: i32
§scale: i32
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Bytes

Decimal backed by byte array.

Fields

§precision: i32
§scale: i32

Implementations§

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impl Decimal

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pub fn from_i32(value: i32, precision: i32, scale: i32) -> Self

Creates new decimal value from i32.

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pub fn from_i64(value: i64, precision: i32, scale: i32) -> Self

Creates new decimal value from i64.

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pub fn from_bytes(value: ByteArray, precision: i32, scale: i32) -> Self

Creates new decimal value from ByteArray.

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pub fn data(&self) -> &[u8]

Returns bytes of unscaled value.

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pub fn precision(&self) -> i32

Returns decimal precision.

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pub fn scale(&self) -> i32

Returns decimal scale.

Trait Implementations§

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impl AsBytes for Decimal

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fn as_bytes(&self) -> &[u8]

Returns slice of bytes for this data type.
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impl Clone for Decimal

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fn clone(&self) -> Decimal

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 Decimal

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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 Decimal

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fn default() -> Self

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

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fn eq(&self, other: &Decimal) -> 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.

Auto Trait Implementations§

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<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,