ColumnMode

gcp_bigquery_client::storage

Enum ColumnMode 

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pub enum ColumnMode {
    Nullable,
    Required,
    Repeated,
}
Expand description

Field cardinality modes for BigQuery schema fields.

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Nullable

Field may contain null values.

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Required

Field must always contain a value.

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Repeated

Field contains an array of values.

Trait Implementations§

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impl Clone for ColumnMode

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fn clone(&self) -> ColumnMode

Returns a duplicate 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 ColumnMode

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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 From<ColumnMode> for Label

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fn from(value: ColumnMode) -> Self

Converts ColumnMode to protobuf Label enum value.

Maps field cardinality modes to their corresponding protobuf labels used in BigQuery Storage Write API schema definitions.

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impl Copy for ColumnMode

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impl<T> Any for T
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fn borrow_mut(&mut self) -> &mut T

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impl<T> CloneToUninit for T
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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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fn __clone_box(&self, _: Private) -> *mut ()

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type Error = <U as TryFrom<T>>::Error

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