Expression class for the LOWER (lowercase) string function. The "arg" constructor parameter must be an expression that resolves to a string datatype (e.g. TEXT)
Driver for running distributed validation on metadata across cluster. DistributedValidate provides functions for running a validation on system metadata across a cluster, with options to remove broken objects that have been identified
Returned by Fragmenter classes in getFragmentsForQuery - tells Executor which fragments to scan from which fragmenter (fragmenter id and fragment id needed for building ChunkKey)
A container for relational algebra descriptors defining the execution order for a relational algebra query. Holds the relational algebra descriptors for executing a relational algebra query. Each descriptor holds both a top-level relational algebra node and a ResultSet ptr holding the results from the execution of the accompany node(s). The sequence can be generated on initialization or lazily with calls to the next() operator
Driver for running cleanup processes on a table. TableOptimizer provides functions for various cleanup processes that improve performance on a table. Only tables that have been modified using updates or deletes are candidates for cleanup. If the table descriptor corresponds to a sharded table, table optimizer processes each physical shard
1.8.5 
