drop() function

drop() removes specified columns from a table.

Columns are specified either through a list or a predicate function. When a dropped column is part of the group key, it is removed from the key. If a specified column is not present in a table, the function returns an error.

Function type signature
(<-tables: stream[A], ?columns: [string], ?fn: (column: string) => bool) => stream[B] where A: Record, B: Record

For more information, see Function type signatures.



List of columns to remove from input tables. Mutually exclusive with fn.


Predicate function with a column parameter that returns a boolean value indicating whether or not the column should be removed from input tables. Mutually exclusive with columns.


Input data. Default is piped-forward data (<-).


Drop a list of columns

import "sampledata"
    |> drop(columns: ["_time", "tag"])

View example input and output

Drop columns matching a predicate

import "sampledata"
    |> drop(fn: (column) => column =~ /^t/)

View example input and output

Was this page helpful?

Thank you for your feedback!

The future of Flux

Flux is going into maintenance mode. You can continue using it as you currently are without any changes to your code.

Read more