Converting a two-tier resource mapping to a one-tier resource mapping may include determining a first mapping from an intermediate data buffer to a data destination. A second mapping from a data source to the intermediate data buffer may also be determined. An optimized mapping from the data source to the data destination may be generated based on the first and second mappings. The optimized mapping may then be used instead of the first and second mappings to collect data from the data source to the data destination, thereby resulting in a one-tier resource mapping. In some instances, the mappings may be sets of one or more queries.