Stream Schema Merge transform Icon Stream Schema Merge


The Stream Schema Merge transform merges multiple inputs with different structures and creates a combination of fields.

If the streams to merge contain fields with the same name but different types, these fields with be combined into a single field of type String.
If you want to make sure fields keep their original data type, make sure to convert them to identical types. e.g. through the Metadata tab in the Select Values transform.

Supported Engines

Hop Engine



Maybe Supported


Maybe Supported


Maybe Supported


Option Description

Transform name

Name of the transform.


The list of transforms to merge. Fields with identical field names in two or more of the input streams will be combined into a unified field (data type is kept if identical, converted to String if different). All fields from all of the input streams will be added to the output stream.