QUERY MEDIATOR, A METHOD OF QUERYING A POLYGLOT DATA TIER AND A COMPUTER PROGRAM EXECUATABLE TO CARRY OUT A METHOD OF QUERYING A POLYGLOT DATA TIER

摘要

A query mediator arranged to query a polyglot data tier of data stores, each data store adopting a data model and the polyglot data tier including at least two different types of data store with differing data models. The query mediator including at least one HTTP API; a catalogue containing metadata for each data store; and a plurality of adapters, one for each data model. The API receives an incoming query from a client, checks the query against the catalogue to identify a correct data store storing the queried data, and routes the query to an adapter for the correct data store. The adapter transforms the query into a format suitable for use with the data model adopted in the correct data store, for execution by the relevant data store. The API returns the query result to the client in response to the incoming query.