Abstract: A database system receives a database language query specifying a grouping clause and one or more aggregate result values. The database system generates a pre-aggregation table based on the query. The database system generates an ingest query configured to generate data for populating the pre-aggregation table and a completion query configured to processes data stored in the pre-aggregation table. The database system periodically receives a set of input records and executes the ingest query to generate a set of pre-aggregation records. The set of pre-aggregation records are combined with the pre-aggregation table. The database system executes the completion query on the data stored in the pre-aggregation table to generate a result set and sends the generated result set to the requestor of the results.

Abstract: A database system receives a database language query specifying a grouping clause and one or more aggregate result values. The database system generates a pre-aggregation table based on the query. The database system generates an ingest query configured to generate data for populating the pre-aggregation table and a completion query configured to processes data stored in the pre-aggregation table. The database system periodically receives a set of input records and executes the ingest query to generate a set of pre-aggregation records. The set of pre-aggregation records are combined with the pre-aggregation table. The database system executes the completion query on the data stored in the pre-aggregation table to generate a result set and sends the generated result set to the requestor of the results.

Abstract: A database system receives a database language query specifying a grouping clause and one or more aggregate result values. The database system generates a pre-aggregation table based on the query. The database system generates an ingest query configured to generate data for populating the pre-aggregation table and a completion query configured to processes data stored in the pre-aggregation table. The database system periodically receives a set of input records and executes the ingest query to generate a set of pre-aggregation records. The set of pre-aggregation records are combined with the pre-aggregation table. The database system executes the completion query on the data stored in the pre-aggregation table to generate a result set and sends the generated result set to the requestor of the results.

Abstract: A real-time analytical database system allows queries on data obtained from a transactional system that is frequently updated by the transactional system. The real-time analytical database system receives change logs from the transactional system. The change logs describe operations performed by the transactional system. The real-time analytical database system stores a plurality of indexes in a key-value store, each index comprising key-value pairs. A key of a key-value pair is obtained by combining field data describing a field of a document. The real-time analytical database system determines modifications to the key-value pairs of the key-value store corresponding to the operations of the transactional system as represented by the received change logs. The real-time analytical database system receives and processes queries using the plurality of indexes.

Abstract: A search system processes queries for accessing information stored in documents. A document comprises fields. The search system stores a plurality of indexes in a key-value store. Each index comprises key-value pairs. A key of a key-value pair is obtained by combining field data describing a field of a document. The value of each field is stored as an individual key-value in the key-value store. The search system receives a query requesting information stored in documents and specifying a search criteria. The search system builds a key-expression based on the search criteria and uses one or more indexes to find key-value pairs matching the key-expression. The search system finds the requested information based on the matching key-value pairs and provides the requested information to the query source.