Merge

Short Description
Ports
Metadata
Merge Attributes
Details
See also

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
yes
yes
1-n1--
yes

Ports

Port typeNumberRequiredDescriptionMetadata
Input0
yes
For input data recordsAny
1-n
no
For input data recordsInput 0
Output0
yes
For merged data recordsInput 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

AttributeReqDescriptionPossible values
Basic
Merge keyyesKey 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.

Merge

Figure 57.2. Merge


[Important]Important

Remember that all key fields must be sorted in ascending order.

See also

ParallelMerge
Concatenate
LoadBalancingPartition
Partition
SimpleGather
Common Properties of Components
Specific Attribute Types
Common Properties of Transformers
Transformers Comparison