store_api::storage

Struct ColumnDescriptorBuilder

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pub struct ColumnDescriptorBuilder {
    id: Option<ColumnId>,
    name: Option<String>,
    data_type: Option<ConcreteDataType>,
    is_nullable: Option<bool>,
    is_time_index: Option<bool>,
    default_constraint: Option<Option<ColumnDefaultConstraint>>,
    comment: Option<String>,
}
Expand description

Builder for ColumnDescriptor.

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§id: Option<ColumnId>§name: Option<String>§data_type: Option<ConcreteDataType>§is_nullable: Option<bool>

Is column nullable, default is true.

§is_time_index: Option<bool>

Is time index column, default is true.

§default_constraint: Option<Option<ColumnDefaultConstraint>>

Default constraint of column, default is None, which means no default constraint for this column, and user must provide a value for a not-null column.

§comment: Option<String>

Implementations§

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impl ColumnDescriptorBuilder

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pub fn id(self, value: ColumnId) -> Self

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pub fn name<VALUE: Into<String>>(self, value: VALUE) -> Self

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pub fn data_type(self, value: ConcreteDataType) -> Self

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pub fn is_nullable(self, value: bool) -> Self

Is column nullable, default is true.

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pub fn is_time_index(self, value: bool) -> Self

Is time index column, default is true.

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pub fn default_constraint(self, value: Option<ColumnDefaultConstraint>) -> Self

Default constraint of column, default is None, which means no default constraint for this column, and user must provide a value for a not-null column.

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pub fn comment<VALUE: Into<String>>(self, value: VALUE) -> Self

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pub fn build(self) -> Result<ColumnDescriptor, ColumnDescriptorBuilderError>

Builds a new ColumnDescriptor.

§Errors

If a required field has not been initialized.

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fn create_empty() -> Self

Create an empty builder, with all fields set to None or PhantomData.

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impl ColumnDescriptorBuilder

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pub fn new<S: Into<String>>( id: ColumnId, name: S, data_type: ConcreteDataType, ) -> Self

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fn validate(&self) -> Result<(), String>

Trait Implementations§

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impl Default for ColumnDescriptorBuilder

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fn default() -> Self

Returns the “default value” for a type. Read more

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