ASYNCHRONOUS DATA ENRICHMENT FOR AN APPEND-ONLY DATA STORE

A method for asynchronous data enrichment may include receiving a query that includes a request for information about an entity. The query may specify a particular time range. In response to receiving the query, event information that is associated with the entity and that corresponds to the specified time range may be combined with additional information that is relevant to the query and that corresponds to the specified time range. The event information may initially be written to a record in an append-only data store. The additional information may become available after the event information, such that the additional information is not included in the record in the append-only data store. Instead, the additional information may initially be written to one or more additional data stores. Both the event information and the additional information may be provided in response to the query.