Abstract: A system stores associates a database query with a name and stores versions of the database query. The system allows applications to execute a specific version of the database query by specifying the name of the database query and a version identifier. For example, the database query may be exposed as an endpoint of a REST API and invoked using calls to the REST API. This allows the applications to be designed without including the query definition within the code of the application. Continuous delivery of database query is performed by creating a new version of the database query that are tested using applications in a test environment. Once the new version of a database query meets test criteria, the new version of the database query is executed by applications running in production environment by sending API requests that identify the query name and the new version.

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.