query/me.ahoo.wow.query.dataset/QueryDataset

QueryDataset

class QueryDataset @InternalWowApi constructor(val name: AggregateType, val scope: QueryDatasetScope, val declaration: QuerySchemaDeclaration, val identity: QueryField<*>? = null, val eventTime: QueryField<*>? = null, val title: String? = null, val storage: ObjectNode = WowJson.mapper.createObjectNode(), val unavailable: String? = null)

A dataset (the DATASET query model): a table-like record set, such as a BI wide table or the ClickHouse Sink's _state_flat view, declared at runtime or in a file rather than in the Manifest. Its fields are its declaration, at the record root; its record layout is its profile.

name is {context}.{dataset}: a dataset takes a name slot of its context, beside that context's aggregates, and the query engine keys it as it keys an aggregate type. storage is the backend's binding of the dataset (a ClickHouse table, say), opaque to the core: its dataset's QueryBindings read it.

A dataset whose unavailable names a reason is served but cannot be queried: each of its queries and its descriptor are answered wow.query.dataset-unavailable (HTTP 409) with that reason, fixed words such as needs revision (7.2b-2), instead of reading a table that may no longer hold what it declares.

Constructors

QueryDataset

@InternalWowApi

constructor(name: AggregateType, scope: QueryDatasetScope, declaration: QuerySchemaDeclaration, identity: QueryField<*>? = null, eventTime: QueryField<*>? = null, title: String? = null, storage: ObjectNode = WowJson.mapper.createObjectNode(), unavailable: String? = null)