Struct Select 

pub struct Select {
    pub keys: HashSet<Key>,
}

Field selection for search results.

Specifies which fields to include in the results. IDs are always included.

Fields

• keys - Set of keys to include in results

Available Keys

• Key::Document - Document text content
• Key::Embedding - Vector embeddings
• Key::Metadata - All metadata fields
• Key::Score - Search scores
• Key::field("name") - Specific metadata field

Performance

Selecting fewer fields improves performance by reducing data transfer:

• Minimal: IDs only (default, fastest)
• Moderate: Scores + specific metadata fields
• Heavy: Documents + embeddings (larger payloads)

Examples

use chroma_types::operator::{Select, Key};
use std::collections::HashSet;

// Select predefined fields
let select = Select {
    keys: [Key::Document, Key::Score].into_iter().collect(),
};

// Select specific metadata fields
let select = Select {
    keys: [
        Key::field("title"),
        Key::field("author"),
        Key::Score,
    ].into_iter().collect(),
};

// Select everything
let select = Select {
    keys: [
        Key::Document,
        Key::Embedding,
        Key::Metadata,
        Key::Score,
    ].into_iter().collect(),
};

Fields

keys: HashSet<Key>

Trait Implementations

impl Clone for Select

fn clone(&self) -> Select

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Select

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

Formats the value using the given formatter.

impl Default for Select

fn default() -> Select

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Select

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for Select

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl TryFrom<Select> for SelectOperator

type Error = QueryConversionError

The type returned in the event of a conversion error.

fn try_from(value: Select) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<SelectOperator> for Select

type Error = QueryConversionError

The type returned in the event of a conversion error.

fn try_from(value: SelectOperator) -> Result<Self, Self::Error>

Performs the conversion.