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join

join [column] [stageLabel]

Joins rows from a previously labeled stage using the provided column as a join key

arguments:

column

The column to join rows by. (type: string)

joinStage

The previously labeled stage to join. (type: string)

examples:

Query


flags:

--appendStage

Used to append the results from a previous stage to the current stage. (provide a label, stage index, or boolean true to append the previous results)

--cache

A boolean value of true/false that determines whether or not to use the cache. Generally most commands will default to true.

--checkpoint

Format: "{CHECKPOINT NAME}:{COLUMN}" Used to store the value of the provided column (in the first row of results) in the provided name for use as a checkpoint in scheduled queries or other stages. Can be accessed using $CHECKPOINTS.{CHECKPOINT NAME}$

--filter

A filter to run on the command results before completing the command. If not provided, no filter is run on the results.

--guid

Adds a populated random guid column.

--joinType

Type of join [left, right, inner, outer] (if no type is provided an inner join is perforemed).

--labelStage

Used to label a stage with a user provided label.

--randomizeHash

Randomizes the stage hash, even if args and flags are the same.

--stats

Controls if a stats calculation is run on a stage after it completes.

--table

A comma separated list of columns to include in the command results. If not provided, all columns will be included.

--type

Each command has a default type, either "mapping" or "reducing". Some commands can operate as either, when "reducing" they will operate on all rows at once, when "mapping", they will operate on one row at a time.

support

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