AdjustOperatorsSchemaVisitor visits corresponding operators' which depending upon their functionality
adjusts their output row types. The adjusting mechanism is unique to each operator. In case of joins this visitor
adjusts the field names to make sure that upstream operator only sees that there are unique field names even though
the children of the join has same field names. Whereas in case of lateral/unnest operators it changes the correlated
field and also the unnest operator's output row type.
Fields inherited from interface org.apache.drill.exec.planner.physical.visitor.PrelVisitor