verifyunique

Check if the rows in a data extract are unique.

Introduction

Use the verifyunique instruction to check if the rows in a data extract are unique.. If a non-unique row is found, the transformation stops.

Creating a custom script transformation using the verifyunique instruction

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

1. Create a custom script transformation.

2. In the Instructions step, select the verifyunique instruction.

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

Keys*

Enter the names of the columns where Adverity checks for unique rows.

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.

Leave this field empty to check all columns in the data extract.

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.