pub struct Field {
    pub name: String,
    pub data_type: DataType,
    pub is_nullable: bool,
    pub metadata: Metadata,
}
Expand description

Represents Arrow’s metadata of a “column”.

A Field is the closest representation of the traditional “column”: a logical type (DataType) with a name and nullability. A Field has optional Metadata that can be used to annotate the field with custom metadata.

Almost all IO in this crate uses Field to represent logical information about the data to be serialized.

Fields

name: String

Its name

data_type: DataType

Its logical DataType

is_nullable: bool

Its nullability

metadata: Metadata

Additional custom (opaque) metadata.

Implementations

Creates a new Field.

Creates a new Field with metadata.

Returns the Field’s DataType.

Trait Implementations

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

Feeds this value into the given Hasher. Read more

Feeds a slice of this type into the given Hasher. Read more

This method tests for self and other values to be equal, and is used by ==. Read more

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason. Read more

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Compare self to key and return true if they are equal.

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

The resulting type after obtaining ownership.

Creates owned data from borrowed data, usually by cloning. Read more

Uses borrowed data to replace owned data, usually by cloning. Read more

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.