duplicate() function
duplicate()
duplicates a specified column in a table.
If the specified column is part of the group key, it will be duplicated, but the duplicate column will not be part of the output’s group key.
Function type signature
(<-tables: stream[A], as: string, column: string) => stream[B] where A: Record, B: Record
Parameters
column
(Required) Column to duplicate.
as
(Required) Name to assign to the duplicate column.
If the as
column already exists, it will be overwritten by the duplicated column.
tables
Input data. Default is piped-forward data (<-
).
Examples
Duplicate a column
import "sampledata"
sampledata.int()
|> duplicate(column: "tag", as: "tag_dup")
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