selectfalse

Introduction

Use the selectfalse instruction to find and keep rows in a given column which contain empty values. Only the rows of the data extract that contain empty values are kept, and all other rows are removed. This is the opposite of the select transformation.

Creating a custom script transformation using the selectfalse instruction

To create and configure a custom script using the selectfalse instruction, follow these steps:

1. Create a custom script transformation.

2. In the Instruction step, select the selectfalse instruction.

3. To configure the custom script instruction, fill in the following fields. Required fields are marked with an asterisk (*).

Field*

Enter the name of the column to search through to find empty values.

Select a column in one of the following ways:

• Select String and enter the name of the column.

• Select Integer and enter the position of the column in the data extract as an index value. Counting starts at 0. To select the first column, enter 0. To select the second column, enter 1. To select the last column in the data extract, enter -1.

Complement

Select this field to reverse the transformation. Any rows that match the search criteria are removed and the rows that do not match the criteria are kept.

Subtable

Enter the name for a subtable that you want to use within this custom script.

A subtable is a temporary table that only exists for this custom script. You can apply additional instructions within the same custom script to the subtable. However, the subtable cannot be used in any other custom scripts.

If a subtable does not exist for the current custom script, the transformation is applied to the data extract, and the enriched data is output into the subtable. If the subtable already exists for the custom script, the subtable is used as the input for the transformation and optionally as the output.

Example