Concatenate
Short Description
Concatenate receives unsorted data records from multiple inputs.
It gathers input records starting with the first input port, continuing with the next one and ending with the last port. Within each input port, the records order is preserved.
| COMPONENT | SAME INPUT METADATA | SORTED INPUTS | INPUTS | OUTPUTS | JAVA | CTL | AUTO-PROPAGATED METADATA |
|---|---|---|---|---|---|---|---|
| Concatenate | ✓ | x | 1-n | 1 | - | - | ✓ |
Ports
| PORT TYPE | NUMBER | REQUIRED | DESCRIPTION | METADATA |
|---|---|---|---|---|
| Input | 0 | ✓ | For input data records | Any |
| 1-n | x | For input data records | Input 0 | |
| Output | 0 | ✓ | For gathered data records | Input 0 |
At least one input port has to be connected. Any other input port can be disabled (changed in 4.1.0-M1).
Metadata
Metadata can be propagated through this component.
Metadata of all input ports must be the same.
Details
First, the component receives all of the records incoming through the first input port, sends all of them to the common output port and, subsequently, adds to them all of the records incoming through the next input port. If the component has more than two input ports, the records are received and sent to the output according to the order of the input ports.
If some of the input ports contain no records, such port is skipped.
See also
Merge
SimpleGather
Common Properties of Components
Specific attribute types
Common Properties of Transformers
Updated about 1 year ago