SORT

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SORT - AWS Glue DataBrew

Sorts the data in one or more columns of a dataset in ascending, descending, or custom order.

Parameters

expressions – A string that contains one or more JSON-encoded strings representing sorting expressions.
- sourceColumn – A string that contains the name of an existing column.
- ordering – Ordering can be either ASCENDING or DESCENDING.
- nullsOrdering – Nulls ordering can be either NULLS_TOP or NULLS_BOTTOM to place null or missing values at the beginning or at the bottom of the column.
- customOrder – A list of strings that defines a custom order for the string sorting. By default, strings are sorted alphabetically.
- isCustomOrderCaseSensitive – Boolean. The default value is false.

Example


{
    "RecipeAction": {
        "Operation": "SORT",
        "Parameters": {
            "expressions": "[{\"sourceColumn\": \"A\", \"ordering\": \"ASCENDING\", \"nullsOrdering\": \"NULLS_TOP\"}]",
       }
    } 
 }

Example of custom sort order

In the following example, the customOrder expression string has the format of a list of objects. Each object describes a sorting expression for one column.


[
  {
    "sourceColumn": "A",
    "ordering": "ASCENDING",
    "nullsOrdering": "NULLS_TOP",
  },
  {
    "sourceColumn": "B",
    "ordering": "DESCENDING",
    "nullsOrdering": "NULLS_BOTTOM",
    "customOrder": ["Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"],
    "isCustomOrderCaseSensitive": false,
  }
]