Merge
Short Description
Merge merges and sorts data records from two or more inputs.
| COMPONENT | SAME INPUT METADATA | SORTED INPUTS | INPUTS | OUTPUTS | JAVA | CTL | AUTO-PROPAGATED METADATA |
|---|---|---|---|---|---|---|---|
| Merge | ✓ | ✓ | 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 | 1 | ✓ | For merged data records | Input 0 |
You can disable only the last input port(s) of Merge, e.g. you can disable the third and fourth input port, but you cannot disable the first one.
Metadata
Merge propagates metadata in both directions. Merge does not change priority of propagated metadata.
Merge has no metadata template.
Merge does not require any specific metadata fields.
All input metadata must be the same. Metadata name and field names may differ, but the field datatypes must correspond to each other.
Merge Attributes
| ATTRIBUTE | REQ | DESCRIPTION | POSSIBLE VALUES |
|---|---|---|---|
| BASIC | |||
| Merge key | yes | The key according to which the sorted records are merged. Remember that all key fields must be sorted in ascending order. For more information, see Group Key. | E.g. first_name; last_name |
Details
Merge receives sorted data records through two or more input ports. The component merges a serie of input records into one.
See also
Concatenate
Partition
SimpleGather
Common Properties of Components
Specific attribute types
Common Properties of Transformers
Updated about 1 year ago