11. The non-transitory computer readable medium of claim 10 , wherein the annotated query plan comprises text that defines a structured query language (SQL) relational operator that describes the shape of a query tree.
11. The non-transitory computer readable medium of claim 10 , wherein the annotated query plan comprises text that defines a structured query language (SQL) relational operator that describes the shape of a query tree. 12. The non-transitory computer readable medium of claim 11 , wherein the first and second query plans are based on the text of the annotated query plan.