Distinct Mapping#

Example#

mappings:
  persons_distinct:
    kind: distinct
    input: persons

Fields#

  • kind (mandatory) (type: string): distinct

  • broadcast (optional) (type: boolean) (default: false): Hint for broadcasting the result of this mapping for map-side joins.

  • cache (optional) (type: string) (default: NONE): Cache mode for the results of this mapping. Supported values are

    • NONE - Disables caching of teh results of this mapping

    • DISK_ONLY - Caches the results on disk

    • MEMORY_ONLY - Caches the results in memory. If not enough memory is available, records will be uncached.

    • MEMORY_ONLY_SER - Caches the results in memory in a serialized format. If not enough memory is available, records will be uncached.

    • MEMORY_AND_DISK - Caches the results first in memory and then spills to disk.

    • MEMORY_AND_DISK_SER - Caches the results first in memory in a serialized format and then spills to disk.

  • input (mandatory) (type: string):

  • filter (optional) (type: string) (default: empty): An optional SQL filter expression that is applied after distinct operation.

Outputs#

  • main - the only output of the mapping

Description#