Generate UUID directive

Recommended: The Generate UUID directive has an incorrect implementation which causes conflicts in the generated UUID (see CDAP-17732). For CDAP 6.3.0 and earlier, use the Add Field transformation to add a unique id field to each record.

The GENERATE-UUID directive generates a universally unique identifier (UUID) of the record.

Syntax

generate-uuid :column

The column is set to the UUID generated for the record.

Usage Notes

The GENERATE-UUID directive generates a type 4, pseudo-randomly generated UUID. The UUID is generated using a cryptographically strong pseudo-random number generator.

Example

Using this record as an example, where you would like to generate a random identifier for the record to uniquely identify it:

{
  "x": 1,
  "y": 2
}

Applying this directive:

generate-uuid :uuid

results in a record similar to this (the value of uuid will vary):