2. The computer-implemented method of claim 1 , wherein the selecting the first subset of condition columns from among the one or more condition columns further comprises: identifying as the first subset of condition columns at least two of the one or more condition columns that are semantically related to one another based on the semantic model.
2. The computer-implemented method of claim 1 , wherein the selecting the first subset of condition columns from among the one or more condition columns further comprises: identifying as the first subset of condition columns at least two of the one or more condition columns that are semantically related to one another based on the semantic model. 3. The computer-implemented method of claim 2 , wherein the decomposing further comprises: identifying one or more sub-tuple groups from the first subset of condition columns, wherein the one or more sub-tuple groups comprise each distinct set of values of the sub-tuples in the first subset of condition columns from the groups of rows.