Struct LoadQuery 

pub struct LoadQuery {
    pub provider: Option<String>,
    pub params: HashMap<String, KindedSlot>,
    pub target_type: Option<String>,
    pub column_mapping: Option<HashMap<String, String>>,
}

Generic data load request (industry-agnostic).

Fields

provider: Option<String>

Provider name (e.g., “data”, “api”, “warehouse”). If None, uses the default provider.

params: HashMap<String, KindedSlot>

Generic parameters (arbitrary key-value). KindedSlot’s explicit Drop/Clone impls dispatch on NativeKind so each parameter’s heap refcount is released on teardown.

target_type: Option<String>

Target type name for validation (e.g., “Candle”, “TickData”).

column_mapping: Option<HashMap<String, String>>

Optional column mapping override.

Implementations

impl LoadQuery

pub fn new() -> Self

Create a new empty load query.

pub fn with_provider(self, name: &str) -> Self

Set the provider name.

pub fn with_param(self, key: &str, value: KindedSlot) -> Self

Add a parameter.

pub fn with_type(self, type_name: &str) -> Self

Set the target type for validation.

pub fn with_column_mapping(self, mapping: HashMap<String, String>) -> Self

Set the column mapping.

pub fn to_data_query(&self) -> Result<DataQuery>

Convert to a provider-specific DataQuery.

Phase 1.B: the param-decode helpers (value_to_timestamp, as_timeframe/as_duration decoders) are deferred to Phase 2c. Until then, this method returns a deferred error rather than silently produce a malformed DataQuery.

Trait Implementations

impl Clone for LoadQuery

fn clone(&self) -> LoadQuery

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LoadQuery

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

Formats the value using the given formatter.

impl Default for LoadQuery

fn default() -> LoadQuery

Returns the “default value” for a type.