DISTRIBUTED, REAL-TIME ONLINE ANALYTICAL PROCESSING (OLAP)

Source data of an event stream is parsed and supplemented with additional data from reference data sources, producing an enriched event stream from the parsed event stream data. The data records of the enriched event stream are partitioned into data fields designated as a dimension partition and a metric partition, which are partitioned into sub-dimension projections mapped to a plurality of storage keys, such that each of the storage keys includes one or more placeholder wildcard values and each of the storage keys is stored into a database of the computer system by the computer processor. The stored storage keys are then aggregated onto a two-dimensional coordinate vector such that, if the computer processor identifies a permuted storage key having metric values for which a corresponding storage key already exists in the database, then the computer processor aggregates the metric values of the identified storage key with the metric values of the corresponding storage key, and if the computer processor does not identify the permuted storage key as having a corresponding storage key that already exists in the database, then the computer processor writes the metric values of the permuted storage key into the database, comprising initial values for the key combination of dimension values.