Alias Mapping#

Provides a new name for an existing mapping. This may be helpful for placeholders to be replaced later.

Example#

mappings:
  facts_bidding:
    kind: alias
    input: facts_all

Fields#

  • kind (mandatory) (string): alias

  • 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) (string):

Outputs#

  • main - the only output of the mapping

Description#

An alias mapping simply provides an additional name to the input mapping.