parquet::schema::types

Struct ColumnDescriptor

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

Physical type for leaf-level primitive columns.

Also includes the maximum definition and repetition levels required to re-assemble nested data.

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impl ColumnDescriptor

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pub fn new( primitive_type: TypePtr, max_def_level: i16, max_rep_level: i16, path: ColumnPath, ) -> Self

Creates new descriptor for leaf-level column.

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pub fn max_def_level(&self) -> i16

Returns maximum definition level for this column.

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pub fn max_rep_level(&self) -> i16

Returns maximum repetition level for this column.

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pub fn path(&self) -> &ColumnPath

Returns ColumnPath for this column.

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pub fn self_type(&self) -> &Type

Returns self type Type for this leaf column.

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pub fn self_type_ptr(&self) -> TypePtr

Returns self type TypePtr for this leaf column.

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pub fn name(&self) -> &str

Returns column name.

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pub fn converted_type(&self) -> ConvertedType

Returns ConvertedType for this column.

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pub fn logical_type(&self) -> Option<LogicalType>

Returns LogicalType for this column.

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pub fn physical_type(&self) -> PhysicalType

Returns physical type for this column. Note that it will panic if called on a non-primitive type.

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pub fn type_length(&self) -> i32

Returns type length for this column. Note that it will panic if called on a non-primitive type.

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pub fn type_precision(&self) -> i32

Returns type precision for this column. Note that it will panic if called on a non-primitive type.

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pub fn type_scale(&self) -> i32

Returns type scale for this column. Note that it will panic if called on a non-primitive type.

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pub fn sort_order(&self) -> SortOrder

Returns the sort order for this column

Trait Implementations§

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impl Debug for ColumnDescriptor

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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 ColumnDescriptor

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fn eq(&self, other: &ColumnDescriptor) -> 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 ColumnDescriptor

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> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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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, 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<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
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impl<T> Allocation for T
where T: RefUnwindSafe + Send + Sync,