Enum parquet::schema::types::Type

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pub enum Type {
    PrimitiveType {
        basic_info: BasicTypeInfo,
        physical_type: Type,
        type_length: i32,
        scale: i32,
        precision: i32,
    },
    GroupType {
        basic_info: BasicTypeInfo,
        fields: Vec<TypePtr>,
    },
}
Expand description

Representation of a Parquet type.

Used to describe primitive leaf fields and structs, including top-level schema.

Note that the top-level schema is represented using Type::GroupType whose repetition is None.

Variants§

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PrimitiveType

Represents a primitive leaf field.

Fields

§basic_info: BasicTypeInfo

Basic information about the type.

§physical_type: Type

Physical type of this primitive type.

§type_length: i32

Length of this type.

§scale: i32

Scale of this type.

§precision: i32

Precision of this type.

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GroupType

Represents a group of fields (similar to struct).

Fields

§basic_info: BasicTypeInfo

Basic information about the type.

§fields: Vec<TypePtr>

Fields of this group type.

Implementations§

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impl Type

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pub fn primitive_type_builder( name: &str, physical_type: PhysicalType, ) -> PrimitiveTypeBuilder<'_>

Creates primitive type builder with provided field name and physical type.

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pub fn group_type_builder(name: &str) -> GroupTypeBuilder<'_>

Creates group type builder with provided column name.

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pub fn get_basic_info(&self) -> &BasicTypeInfo

Returns BasicTypeInfo information about the type.

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pub fn name(&self) -> &str

Returns this type’s field name.

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pub fn get_fields(&self) -> &[TypePtr]

Gets the fields from this group type. Note that this will panic if called on a non-group type.

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pub fn get_physical_type(&self) -> PhysicalType

Gets physical type of this primitive type. Note that this will panic if called on a non-primitive type.

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pub fn get_precision(&self) -> i32

Gets precision of this primitive type. Note that this will panic if called on a non-primitive type.

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pub fn get_scale(&self) -> i32

Gets scale of this primitive type. Note that this will panic if called on a non-primitive type.

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pub fn check_contains(&self, sub_type: &Type) -> bool

Checks if sub_type schema is part of current schema. This method can be used to check if projected columns are part of the root schema.

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pub fn is_primitive(&self) -> bool

Returns true if this type is a primitive type, false otherwise.

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pub fn is_group(&self) -> bool

Returns true if this type is a group type, false otherwise.

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pub fn is_schema(&self) -> bool

Returns true if this type is the top-level schema type (message type).

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pub fn is_optional(&self) -> bool

Returns true if this type is repeated or optional. If this type doesn’t have repetition defined, we treat it as required.

Trait Implementations§

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impl Clone for Type

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fn clone(&self) -> Type

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 Type

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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 Type

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

Auto Trait Implementations§

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impl Freeze for Type

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impl RefUnwindSafe for Type

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impl Send for Type

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impl Sync for Type

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impl Unpin for Type

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impl UnwindSafe for Type

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,