1. A method comprising: receiving, by a computing device, execution results of a plurality of query language expressions, the plurality of query language expressions being concurrently executed, and the receiving being contemporaneous with production of the execution results; and storing, by the computing device, a result item of the execution results for at least a first of the query language expressions in a memory block allocated exclusively for the first of the query language expressions while the first of the query language expressions is being executed, or in a result handle associated with the first of the query language expressions.