make_col [columnbinding: expression]+

Add one or more new columns from the input dataset to the output dataset. See also: 'extract_regex'.

Categories

• Projection

Accelerable

make_col is always accelerable if the input is accelerable. A dataset that only uses accelerable verbs can be accelerated, making queries on the dataset respond faster.

Examples

make_col message:string(data.payload.message), ok:string(data.payload.ok)

Create the columns 'message' and 'ok' by coercing various data column object fields to strings.