Query processing using primary data versioning and secondary data

A computing system that implements a data processing service, the computing system comprising:

• memory;
• one or more processing units coupled to the memory;
• and
• one or more non-transitory computer readable storage media storing instructions that, when loaded into the memory, cause the one or more processing units to perform operations for:
• receiving first version data for a plurality of data records;
• storing the first version data in a version data store;
• receiving second version data, the second version data comprising second version data for at least a portion of the plurality of data records;
• receiving first secondary data;
• storing the first secondary data in a secondary data store;
• receiving a data processing request;
• and
• with at least one of the one or more processing units, selecting request results from a data set comprising the first secondary data and data elements of the second version data not inconsistent with the first secondary data.

In a computing system comprising a memory and one or more processors, a method of performing a query on a merged data set that includes a version of primary data and secondary data, the method comprising:

• storing a first version of primary data and a first version identifier associated with the first version of primary data in a primary data version store;
• storing a second version of primary data and a second version identifier associated with the second version of primary data in the primary data version store;
• receiving a simulation request, the simulation request comprising a simulation identifier;
• determining a base primary data version identifier associated with the simulation identifier;
• determining simulation results from a data set comprising secondary data associated with the simulation identifier and version data of the primary data version store having a version identifier corresponding to the base primary data version identifier associated with the simulation identifier and not represented in the secondary data.