[FLINK-3634] Fix documentation for DataSetUtils.zipWithUniqueId()

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.1.0
• Fix Version/s: 1.0.1, 1.1.0
• Component/s: Documentation
• Assignee: Greg Hogan
• Reporter: Greg Hogan
• Created: 17/Mar/16 13:41
• Updated: 11/Apr/16 12:22
• Resolved: 11/Apr/16 12:22

Description

Under FLINK-2590 the assignment and testing of unique IDs was improved but the documentation looks to still reference the old implementation.

With parallelism=1 there is no difference between zipWithUniqueID and zipWithIndex. With greater parallelism the results of zipWithUniqueID are dependent on the partitioning.

The documentation should demonstrate a possible result that is different from the incremental sequence of zipWithIndex while noting that results are dependent on the parallelism and partitioning.