Concat

CAUTION

This transform has been deprecated in favor of the remap transform, which enables you to use Vector Remap Language (VRL for short) to create transform logic of any degree of complexity. The examples below show how you can use VRL to replace this transform's functionality.

.message = "The severity level is " + .level

Example Configuration

Date

Config

Input

Output

1[transforms.my_transform_id]
2type = "concat"
3joiner = "/"
4target = "date"
5items = [ "month", "day", "year" ]

1{
2  "log": {
3    "message": "Hello world",
4    "month": "12",
5    "day": "25",
6    "year": "2020"
7  }
8}

1{
2  "log": {
3    "message": "Hello world",
4    "date": "12/25/2020",
5    "month": "12",
6    "day": "25",
7    "year": "2020"
8  }
9}

Configuration Options

Required Options

items(required)

A list of substring definitons in the format of source_field[start..end]. For both start and end negative values are counted from the end of the string.

Type	Syntax	Default	Example
array	literal		["first[..3]","second[-5..]","third[3..6]"]

inputs(required)

A list of upstream source or transform IDs. Wildcards (*) are supported.

See configuration for more info.

Type	Syntax	Default	Example
array	literal		["my-source-or-transform-id","prefix-*"]

target(required)

The name for the new label.

Type	Syntax	Default	Example
string	literal		["root_field_name","parent.child","array[0]"]

type(required)

The component type. This is a required field for all components and tells Vector which component to use.

Type	Syntax	Default	Example
string	literal		["concat"]

Advanced Options

joiner(optional)

The string that is used to join all items.

Type	Syntax	Default	Example
string	literal		[" ",",","_","+"]

How it Works

State

This component is stateless, meaning its behavior is consistent across each input.