Is there any way to add specific number on numeric column during CDC in AWS DMS?

Change Data Capture (CDC) is a feature provided by AWS Database Migration Service (DMS) that allows you to capture changes happening in your source database and replicate them to your target database. It helps you keep your target database up-to-date with the changes happening in the source database.

When using CDC in AWS DMS, you might come across a scenario where you need to add a specific number to a numeric column during the replication process. This article will guide you on how to achieve this.

Understanding CDC in AWS DMS

Before we dive into the specifics of adding a specific number to a numeric column during CDC, let's understand the basics of CDC in AWS DMS.

AWS DMS captures changes happening in the source database by reading the transaction logs of the source database. It then converts those changes into a format that can be applied to the target database. These changes are typically in the form of insert, update, or delete operations.

During the replication process, AWS DMS creates a replication instance that acts as a bridge between the source and target databases. It captures the changes from the source database and applies them to the target database.

Adding a Specific Number to a Numeric Column during CDC

By default, AWS DMS replicates the changes exactly as they are in the source database. However, there might be cases where you need to modify the data during the replication process. One such case is when you want to add a specific number to a numeric column.

To achieve this, you can make use of the AWS DMS Transformation feature. Transformations allow you to modify the data being replicated from the source to the target database.

Here's how you can add a specific number to a numeric column during CDC in AWS DMS:

1. Create a new transformation rule in your AWS DMS task.
2. Specify the source and target tables for which you want to add the specific number to a numeric column.
3. Define the transformation rule using the AWS DMS Transformation Expression Language.
4. In the transformation rule, specify the column to which you want to add the specific number and the desired operation. For example, if you want to add 10 to the column, you can use the expression column_name + 10.

Once you have defined the transformation rule, AWS DMS will apply it to the changes captured from the source database before replicating them to the target database. This way, the specific number will be added to the numeric column during the replication process.

It's important to note that the AWS DMS Transformation feature provides a wide range of transformation expressions that you can use to modify the data during replication. You can perform various operations like addition, subtraction, multiplication, division, concatenation, and more.

Adding a specific number to a numeric column during CDC in AWS DMS is possible by using the AWS DMS Transformation feature. By defining a transformation rule and specifying the desired operation, you can modify the data being replicated from the source to the target database.

AWS DMS provides a powerful and flexible way to replicate data between databases, and the Transformation feature adds an extra layer of customization to meet your specific requirements.