6. The method of claim 4 , wherein the particular operator is a join operator that computes pairs of first tuples of a first table and second tuples of the table that have matching values.
4. The method of claim 1 , further comprising: determining that the dynamic scan operator occurs in a subtree rooted at a particular operator; and in response to determining that the dynamic scan operator occurs in a subtree rooted at the particular operator, pushing the partition selector operator to a child operator of the particular operator.