base.reduce_join

Join a collection of tables on one or more key columns (the SQL JOIN analogue). Tables are joined sequentially in the collection's lexicographic filename order, accumulating left-to-right.

Kind: reduce
Network: no

Inputs🔗

Name	Type	Description
`tables`	collection of file (Parquet)	Tables to join, processed in lexicographic order of filename.
`on`	string	Comma-separated list of key column names.
`how`	string	One of `inner` (default), `left`, `right`, `outer`.

Outputs🔗

Name	Type	Description
`result`	file (Parquet)	Joined table.

Example🔗

- id: 01890000-0000-0000-0000-00000000000c
  name: base.reduce_join
  inputs:
    - 01890000-0000-0000-0000-000000000007
  args:
    on: "id"
    how: "inner"