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GraphQL · Function

extendSchema

GraphQL is a query language for client applications. Clients describe the fields they need, and an application service returns data in that requested shape.

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Syntax

query GetUser($id: ID!) { user(id: $id) { name } }

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  • GraphQL query
  • schema
  • type system
  • application service
  • fields

Source: GraphQL September 2025 Specification. Checked 2026-11-03.