Join Rows transform Icon Join Rows


The Join Rows transform allows you to produce combinations (Cartesian product) of all rows in the input streams.

Supported Engines

Hop Engine



Maybe Supported


Maybe Supported


Maybe Supported


Option Description

Transform name

Name of the transform this name has to be unique in a single pipeline.

Temp directory

Specify the name of the directory where the system stores temporary files in case you want to combine more then the cached number of rows.

TMP-file prefix

This is the prefix of the temporary files that will be generated.

Max. cache size

The number of rows to cache before the system reads data from temporary files; required when you want to combine large row sets that do not fit into memory.

Main transform to read from

Specifies the transform from which to read most of the data; while the data from other transforms are cached or spooled to disk, the data from this transform is not.

The Condition(s)

You can enter a complex condition to limit the number of output row.

Metadata Injection Support

All fields of this transform support metadata injection. You can use this transform with ETL Metadata Injection to pass metadata to your pipeline at runtime.