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.
generate-uuid :column |
The column is set to the UUID generated for the record.
The GENERATE-UUID directive generates a type 4, pseudo-randomly generated UUID. The UUID is generated using a cryptographically strong pseudo-random number generator.
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):
{
"x": 1,
"y": 2,
"uuid": "57126d32-8c91-4c00-9697-8abda450e836"
} |