A work unit that runs a database query, processes the results, and returns a string (presumably a database insert statement)
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A work unit that runs a database query, processes the results, and returns a string (presumably a database insert statement)
A work unit base class that can serialize and deserialize a map representing a database row (keys are column names, values are column values) and a string representing a query to be executed by the master node upon completion of the workunit. This work unit should be treated as a pure virtual since no run() function is implemented.