119. The machine-readable storage medium of claim 118 , wherein the one or more sequences of instructions further comprise instructions which, when executed by the one or more processors, cause the one or more processors to perform the step of determining the alternative query block based on the first query block.
119. The machine-readable storage medium of claim 118 , wherein the one or more sequences of instructions further comprise instructions which, when executed by the one or more processors, cause the one or more processors to perform the step of determining the alternative query block based on the first query block. 121. The machine-readable storage medium of claim 119 , wherein the first query block is a first subquery and wherein the instructions that cause determining the alternative query block comprise instructions which, when executed by the one or more processors, cause the one or more processors to perform the steps of: unnesting the first subquery; determining an interim query block based on the unnesting step, wherein the interim query block comprises a mergeable view; merging the mergeable view; and determining the alternative query block based on the merging step.