Query Projection

Kind: technique

Layer: Execution Core

Record: lexicon:query-projection

Canonical: Lexicon

A technique for maintaining a read model shaped for one query, updated from the writes it depends on.

Listed in Lexicon terms, after Workflow Complexity and before Introduce Async Event.

Category

• Event Messaging Async

Refactors

• Synchronous Chain Trap
• Chatty Interface
• N Plus One Query
• Event Sourcing
• Asynchronous Communication
• Eventual Consistency

Linked from

• Anti-patterns
• Event / Messaging / Asynchronous Architecture