Enum parquet::record::Field

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pub enum Field {
Show 22 variants Null, Bool(bool), Byte(i8), Short(i16), Int(i32), Long(i64), UByte(u8), UShort(u16), UInt(u32), ULong(u64), Float16(f16), Float(f32), Double(f64), Decimal(Decimal), Str(String), Bytes(ByteArray), Date(i32), TimestampMillis(i64), TimestampMicros(i64), Group(Row), ListInternal(List), MapInternal(Map),
}
Expand description

API to represent a single field in a Row.

Variants§

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Null

Null value.

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Bool(bool)

Boolean value (true, false).

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Byte(i8)

Signed integer INT_8.

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Short(i16)

Signed integer INT_16.

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Int(i32)

Signed integer INT_32.

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Long(i64)

Signed integer INT_64.

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UByte(u8)

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UShort(u16)

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UInt(u32)

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ULong(u64)

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Float16(f16)

IEEE 16-bit floating point value.

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Float(f32)

IEEE 32-bit floating point value.

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Double(f64)

IEEE 64-bit floating point value.

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Decimal(Decimal)

Decimal value.

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Str(String)

UTF-8 encoded character string.

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Bytes(ByteArray)

General binary value.

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Date(i32)

Date without a time of day, stores the number of days from the Unix epoch, 1 January 1970.

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TimestampMillis(i64)

Milliseconds from the Unix epoch, 1 January 1970.

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TimestampMicros(i64)

Microseconds from the Unix epoch, 1 January 1970.

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Group(Row)

Struct, child elements are tuples of field-value pairs.

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ListInternal(List)

List of elements.

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MapInternal(Map)

List of key-value pairs.

Implementations§

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impl Field

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pub fn is_primitive(&self) -> bool

Determines if this Row represents a primitive value.

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pub fn convert_bool(_descr: &ColumnDescPtr, value: bool) -> Self

Converts Parquet BOOLEAN type with logical type into bool value.

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pub fn convert_int32(descr: &ColumnDescPtr, value: i32) -> Self

Converts Parquet INT32 type with converted type into i32 value.

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pub fn convert_int64(descr: &ColumnDescPtr, value: i64) -> Self

Converts Parquet INT64 type with converted type into i64 value.

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pub fn convert_int96(_descr: &ColumnDescPtr, value: Int96) -> Self

Converts Parquet INT96 (nanosecond timestamps) type and logical type into Timestamp value.

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pub fn convert_float(_descr: &ColumnDescPtr, value: f32) -> Self

Converts Parquet FLOAT type with logical type into f32 value.

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pub fn convert_double(_descr: &ColumnDescPtr, value: f64) -> Self

Converts Parquet DOUBLE type with converted type into f64 value.

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pub fn convert_byte_array( descr: &ColumnDescPtr, value: ByteArray, ) -> Result<Self>

Converts Parquet BYTE_ARRAY type with converted type into a UTF8 string, decimal, float16, or an array of bytes.

Trait Implementations§

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impl Clone for Field

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fn clone(&self) -> Field

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 Field

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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 Display for Field

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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 PartialEq for Field

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fn eq(&self, other: &Field) -> 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 StructuralPartialEq for Field

Auto Trait Implementations§

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impl !Freeze for Field

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impl RefUnwindSafe for Field

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impl Send for Field

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impl Sync for Field

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impl Unpin for Field

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impl UnwindSafe for Field

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> ToString for T
where T: Display + ?Sized,

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default fn to_string(&self) -> String

Converts the given value to a String. 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,