Head operator

However, you can determine the following by means of options:

• The number of records to copy
• The partition from which the records are copied
• The location of the records to copy
• The number of records to skip before the copying operation begins.

This control is helpful in testing and debugging jobs with large data sets. For example, the -part option lets you see data from a single partition to ascertain if the data is being partitioned as you want. The -skip option lets you access a portion of a data set.

The tail operator performs a similar operation, copying the last n records from each partition. See Tail operator.