Aws on David Lang

Using dynamic SQL query in Redshift database

Thu, 16 Nov 2023 00:00:00 +0000

While working with a client, we had a requirement to perform bulk insert/update using Retool table and Redshift database. For this situation, We had to loop through the table records and execute a dynamic SQL query in Redshift.

Redshift database supports execution of dynamic SQL with the help of Prepared Statements or Stored Procedures.

Prepared Statements

We use prepared statements when we want to execute dynamic SQL queries directly without a stored procedure. When a prepared statement is executed, the SQL statement is parsed, rewritten, and planned. We then EXECUTE the prepared statement.

Passing AWS Solutions Architect Associate 2020 Exam

Sun, 03 Sep 2023 00:00:00 +0000

Last week I finally took a plunge and decided to take the AWS Solutions Architect 2020 - Associate exam. I passed the exam with a score of 926 / 1000.

I have been working in the cloud space for more than 5 years, but never got the interest in taking the exam. While having a chat with a friend, he told me that he cleared 4 to 5 AWS certifications including AWS Solutions Architect - Professional. That piqued my interest and decided to start with AWS Solutions Architect - Associate.

Serverless Architecture with AWS Lambda

Tue, 03 May 2022 00:00:00 +0000

Serverless lets you run code without provisioning servers. AWS Lambda executes functions in response to HTTP, queue, or schedule events-you pay per invocation.

Handler Example

exports.handler = async (event) => {
  const body = JSON.parse(event.body || '{}');
  const result = await processOrder(body);
  return {
    statusCode: 200,
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify(result),
  };
};

Architecture Patterns

API Gateway + Lambda for REST endpoints. S3 triggers for image processing. EventBridge for scheduled jobs. Keep functions small and cold-start aware-choose appropriate memory and runtime (Node 20).

AWS for Full Stack Developers: Core Services

Fri, 10 Sep 2021 00:00:00 +0000

Amazon Web Services powers a large share of production full stack apps. Knowing a focused subset of services beats memorizing the entire catalog.

Essential Services

Service	Use case
EC2 / ECS / Lambda	Compute
S3	Static assets, uploads
RDS / DynamoDB	Databases
CloudFront	CDN
IAM	Permissions
Route 53	DNS

A Typical Architecture

React on S3 + CloudFront, API on ECS Fargate or Lambda behind API Gateway, PostgreSQL on RDS, secrets in Secrets Manager, logs in CloudWatch.