Some aspects include determination of a data structure including a plurality of query language configuration parameters and at least two values associated with each of the plurality of query language configuration parameters, and generation, based on the data structure, of a first structured language query associated with a first value associated with one of the plurality of query language configuration parameters, and a second structured language query associated with a second value associated with the one of the plurality of query language configuration parameters. Also included are determination of a first expected query result associated with the first structured language query and a second expected query result associated with the second structured language query, query of a data source with the first structured language query and the second structured language query, reception of a first query result associated with the first structured language query and a second query result associated with the second structured language query, determination that the first query result matches the first expected query result and that the second query result does not match the second expected query result, and addition, to a query language configuration parameter file associated with the data source, of the one of the plurality of query language configuration parameters in association with the first value.