Let’s Talk CDC Change Feed Playground
Plan · Practice · Share

Prototype change data capture without leaving the browser.

Create a lightweight schema, act on rows, and watch the resulting change feed update in real time.

This is the hands-on simulator. New to CDC, or want the concepts, labs, and vendor guides? Visit Let’s Talk CDC, the companion learning site.

Choose your path

Guided walkthrough or real-world scenarios

Start with the guided walkthrough to experience the full flow, or jump straight into curated CDC blueprints.

Learn CDC methods Compare CDC tooling

Want presets instead? Pick any scenario below to load schema, rows, and starting operations instantly.

Guided walkthrough

We’ll help you:

  • Model a table with clear primary keys.
  • Seed realistic rows to operate on.
  • Trigger inserts, updates, and deletes to watch the change feed react in real time.
Takes about a minute end-to-end.

Explore real-world scenarios

Load curated CDC blueprints to jumpstart your experiments.

Step 1

Model your schema

Add columns, choose types, and mark primary keys so downstream operations know how to locate rows.

Operate

Edit row values

Provide values for your columns, then choose an operation to emit events.

Use made-up data only. Events and shared scenarios are stored on a shared server, other visitors can see the live event stream, and both are deleted after 30 days, so share links stop working after about 30 days; your own browser's copy stays on your device.

Schema walkthrough

Add and drop a column to see how capture methods react during the stream.

Step 2

Populate the table

Review current rows, seed realistic data, or clear the table to reset.

Step 3

Inspect change events

Filter operations, include before-images, and export NDJSON to share scenarios.

Use made-up data only. Events and shared scenarios are stored on a shared server, other visitors can see the live event stream, and both are deleted after 30 days, so share links stop working after about 30 days; your own browser's copy stays on your device.

Envelope

Stream controls

Kick off snapshots, clear logs, and decide how much context to ship with each event.

Visibility

Filter & export

Toggle operations and save NDJSON when you are ready to share. 


                

                  

                    

                      
Event inspector

                      

                        Peek at before/after payloads, diff fields, and replay to
                        the table.
                      

                    

                    

                      
                      
                      
                    

                  

                  

                    
    
                    
    
                  
    
                
    
              
    
              
            
    
          
    
        
    
      
    

      
    
        
    
          
    
            
    Interactive simulator
    
            
    
              See change data capture in motion
            
    
            
    
              Two ways to explore the same idea. Start by driving a single change feed end to end,
              then switch tabs to run polling, trigger, and log capture side by side.
            
    
          
    
        
    

        
    
          
          
        
    

        
    
          
    
            Drive one change feed end to end — switch the apply policy (apply on commit vs as polled),
            introduce schema drift, and drop events to watch how transactions hold up.
          
    
          
    
            
    
              
              Loading the change feed playground…