query/me.ahoo.wow.query.schema/EventsQueryModelProfile

EventsQueryModelProfile

class EventsQueryModelProfile : BuiltInQueryModelProfile

The event streams of one aggregate type: one record per stream, identified by (aggregateId, version), its events an array whose conditions are element predicates (ELEMENT_MATCH), so count counts commits and a page never splits one. Per-event analytics expand the array (AggregationQuery.elements).

The identity a record-id filter (ID, IDS) targets is the aggregate id, as before the unified engine; the cursor's tie-breakers are (tenantId, aggregateId, version), the stream's key in its log.
The default FIRST / LAST order is the commit time. A stream is never deleted: the model has no deleted field and no default scope.
A projection keeps or drops events as a whole: an event is read (upgraded, masked) as one value.

What one aggregate type's Manifest says about its events reaches admission here:

storedNames: the names each event is stored under besides its current one (its @Aliases, as stored), so a name condition inside an element scope of events matches the events the log stores under them;
retired: the stored names the aggregate retired, which every element scope of events excludes, so a condition never matches an event the record does not show;
revisions: each event's current revision; a body path of an event past revision 1 is not filtered, sorted or aggregated (see EventsQuerySchemas).

Types

Companion

@InternalWowApi

object Companion

Properties

cursorUniqueKey

open override val cursorUniqueKey: List<QueryField<*>>

The fields that identify one record across the whole model, in the order a cursor appends them as its tie-breakers: the identityField alone by default, or nothing when the model has none.

eventsField

val eventsField: QueryField<*>

The element array of the events, the container storedNames and retired apply to.

eventTimeField

open override val eventTimeField: QueryField<*>

When the record last changed: the default orderBy of FIRST and LAST metrics; null when there is none.

identityField

open override val identityField: QueryField<*>

Unique record identity: the target of id filters and the tie-breaker of every cursor; null when the model declares none, which rejects both.

nameField

val nameField: QueryField<*>

The name field of an event, relative to eventsField.