13. The non-transitory computer-readable storage medium of claim 8 , wherein the method further comprises: determining, prior to executing a next processing step from the set of processing steps, that a next partial result generated within the next query processing step using the enumeration value instead of the column cell value changes the next partial result, wherein the determination that the next partial result does change is performed based on a type of the next query processing step, a data type of the column cell value, and a role of the column within the next query processing step; translating, in response to the determination that the next partial result does change, the enumeration value into the column cell value using the lookup table; and executing, in response to the determination that the next partial result does change, the next query processing step using the column cell value to produce the next partial result.
13. The non-transitory computer-readable storage medium of claim 8 , wherein the method further comprises: determining, prior to executing a next processing step from the set of processing steps, that a next partial result generated within the next query processing step using the enumeration value instead of the column cell value changes the next partial result, wherein the determination that the next partial result does change is performed based on a type of the next query processing step, a data type of the column cell value, and a role of the column within the next query processing step; translating, in response to the determination that the next partial result does change, the enumeration value into the column cell value using the lookup table; and executing, in response to the determination that the next partial result does change, the next query processing step using the column cell value to produce the next partial result. 14. The non-transitory computer-readable storage medium of claim 13 , wherein the translating the enumeration value into the column cell value using the lookup table comprises: retrieving the column cell value from the lookup-table using the enumeration value as a key.