1. A system, comprising: a rewrite logic embodied on a non-transitory computer-readable medium and configured to identify a blocking operation in a first query having a hard time constraint and to selectively produce a rewritten query based on the first query by, at least, rewriting a child operation in the blocking operation based, at least in part, on the hard time constraint, where the rewritten query includes a plurality of child operations; and a timer logic to establish a top level timer associated with execution of the rewritten query, and one or more action timers associated with execution of the child operations in the rewritten query, where the execution of the child operations in the rewritten query is terminated on expiration of an action timer associated with the child operation, where the action timer associated with the child operation is set to a predicted execution time for the child operation.