Lessons

How to Use AWS CLI to Update a DynamoDB Table with Global Secondary Index

Introduction

In this lesson, we will learn how to use AWS CLI to update a DynamoDB table with Global Secondary Index (GSI). We will cover the basics of DynamoDB and GSI, and then we will look at how to use AWS CLI to update a DynamoDB table with GSI. We will also look at some examples of how to use AWS CLI to update a DynamoDB table with GSI.

What is DynamoDB?

DynamoDB is a fully managed NoSQL database service provided by Amazon Web Services (AWS). It is a fast and flexible database that can be used to store and retrieve data from any application. DynamoDB is designed to be highly available, scalable, and secure. It is also designed to be cost-effective and easy to use.

What is Global Secondary Index (GSI)?

Global Secondary Index (GSI) is a feature of DynamoDB that allows you to create an index on any attribute of a table. This index can be used to quickly query and retrieve data from the table. GSI can be used to improve the performance of queries and to reduce the cost of data retrieval.

How to Use AWS CLI to Update a DynamoDB Table with GSI

In this section, we will look at how to use AWS CLI to update a DynamoDB table with GSI. We will cover the following topics:

  • Creating a GSI
  • Updating a GSI
  • Deleting a GSI

Creating a GSI

To create a GSI, you will need to use the aws dynamodb create-global-secondary-index command. This command takes the following parameters:

  • --table-name: The name of the table to create the GSI on.
  • --index-name: The name of the GSI to create.
  • --key-schema: The key schema for the GSI. This is a list of attribute names and types that will be used to index the table.
  • --projection: The projection type for the GSI. This is used to specify how the data in the GSI will be stored.

For example, to create a GSI on the Users table with the name UserNameIndex, the following command can be used:

aws dynamodb create-global-secondary-index \
    --table-name Users \
    --index-name UserNameIndex \
    --key-schema AttributeName=userName,KeyType=HASH \
    --projection Type=ALL

This command will create a GSI on the Users table with the name UserNameIndex. The GSI will be indexed on the userName attribute and will store all of the data in the table.

Updating a GSI

To update a GSI, you will need to use the aws dynamodb update-global-secondary-index command. This command takes the following parameters:

  • --table-name: The name of the table to update the GSI on.
  • --index-name: The name of the GSI to update.
  • --key-schema: The key schema for the GSI. This is a list of attribute names and types that will be used to index the table.
  • --projection: The projection type for the GSI. This is used to specify how the data in the GSI will be stored.

For example, to update the UserNameIndex GSI on the Users table, the following command can be used:

aws dynamodb update-global-secondary-index \
    --table-name Users \
    --index-name UserNameIndex \
    --key-schema AttributeName=userName,KeyType=HASH \
    --projection Type=INCLUDE,NonKeyAttributes=email

This command will update the UserNameIndex GSI on the Users table. The GSI will be indexed on the userName attribute and will only store the email attribute in the GSI.

Deleting a GSI

To delete a GSI, you will need to use the aws dynamodb delete-global-secondary-index command. This command takes the following parameters:

  • --table-name: The name of the table to delete the GSI from.
  • --index-name: The name of the GSI to delete.

For example, to delete the UserNameIndex GSI from the Users table, the following command can be used:

aws dynamodb delete-global-secondary-index \
    --table-name Users \
    --index-name UserNameIndex

This command will delete the UserNameIndex GSI from the Users table.

Conclusion

In this lesson, we have learned how to use AWS CLI to update a DynamoDB table with Global Secondary Index (GSI). We have covered the basics of DynamoDB and GSI, and then we have looked at how to use AWS CLI to create, update, and delete a GSI. We have also looked at some examples of how to use AWS CLI to update a DynamoDB table with GSI.

The key learnings from this lesson are:

  • DynamoDB is a fully managed NoSQL database service provided by Amazon Web Services (AWS).
  • Global Secondary Index (GSI) is a feature of DynamoDB that allows you to create an index on any attribute of a table.
  • To create, update, and delete a GSI, you will need to use the aws dynamodb create-global-secondary-index, aws dynamodb update-global-secondary-index, and aws dynamodb delete-global-secondary-index commands, respectively.
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