Struct AddColumnsRequest 

pub struct AddColumnsRequest {
    pub locator: StorageLocator,
    pub expressions: Vec<ComputedColumn>,
    pub read_columns: Option<Vec<String>>,
}

Request to add computed columns to a collection.

The supplied Lance implementation completes eager SQL backfill before returning CatalogResponse::Completed. Both supplied Lance and Surreal implementations reject a present read_columns value, including an empty list, with StorageError::UnsupportedCapability before mutation. Use None to let the expressions determine their inputs.

Examples

let request = storage_kit::database::catalog::AddColumnsRequest {
    locator: storage_kit::database::StorageLocator::new("documents"),
    expressions: vec![storage_kit::database::catalog::ComputedColumn {
        name: "summary_len".into(),
        expression_sql: "length(summary)".into(),
    }],
    read_columns: None,
};
assert_eq!(request.expressions.len(), 1);

Fields

locator: StorageLocator

Collection that should receive the new computed columns.

expressions: Vec<ComputedColumn>

Computed columns to add.

read_columns: Option<Vec<String>>

Optional source columns that the expression depends on.

This is request-specific optional behavior. The supplied Lance and Surreal implementations reject every present value, including an empty list, with StorageError::UnsupportedCapability before mutation. A schema-evolution capability bit does not guarantee this option.

Trait Implementations

impl Clone for AddColumnsRequest

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for AddColumnsRequest

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for AddColumnsRequest

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for AddColumnsRequest

impl PartialEq for AddColumnsRequest

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for AddColumnsRequest

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for AddColumnsRequest