Flink SQL Enrichment Strategies on Confluent Cloud (and the AI Skill That Writes Them for You)

Sun, 12 Apr 2026 00:00:00 +0000

TLDR

Rion Williams wrote the theory on four Flink enrichment strategies. I built the runnable SQL for Confluent Cloud, where a few things work differently than open-source Flink (no PROCTIME(), no JDBC lookup joins).
External enrichment uses a regular LEFT JOIN against a compacted Kafka topic. Gradual enrichment uses an event-time temporal join that gives you version-correct customer data per order. Both run as pure Flink SQL on Confluent Cloud.
I published a Flink SQL skill on the Tessl registry that generates these queries for you. Pair it with mcp-confluent and your AI assistant can write the SQL, create the topics, and submit the Flink statements without you leaving the editor.