General: DiscreteIntegerSequence
Produces a field that is the record number in a table, stored as a discrete integer
Purpose
Use this function to:
- Create a unique primary key on an existing table of less than 1 million rows
- Identify and select specific records by row number
- Create a record key for use in preparing source data for modelling
Return Value
| Property | Value |
|---|---|
| FieldType | Integer |
| FieldSize | Low / Med / High |
| DataType | Discrete |
| DataSize | Integer |
Example Return Value: 1.....N where N = number of records in the table.
Parameters
| Parameter | JSON | Description |
|---|---|---|
| Table | “targetTable”: “MyTableName” | The target table on which the new field will be created |
| Filter | “dataset”: {DataSet_JSON} | Optional. If a filter is applied, records not in the filter recordset will be returned as null. |
| Function | "function":"DiscreteIntegerSequence" | DiscreteIntegerSequence |
JSON Sample
{
"method": "BuildBakedField",
"project": "Model1",
"targetTable": "worldcities",
"overwrite": true,
"name": "KeyField",
"function": "discreteintegersequence"
}Usage Notes
See Also:
- Engineering | Expression Field
- LongSequenceKey (General Functions)
- IntegerSequenceKey (General Functions)
- MakeContinuousKey (General Functions)
Example
| Example | Details |
|---|---|
| Description | Create a discrete key field to give each worldcity an ID |
| Input |
|
| Sample |  |