Source: https://dev-docs.nebula-graph.io/v5.3.2/database-gql-reference/server-prog/
Documentation version: v5.3.2

# Server-side programming overview

GQL supports server-side programming through [user-defined procedures (UDPs)](https://dev-docs.nebula-graph.io/v5.3.2/database-gql-reference/procedures/create/). This allows developers to extend the capabilities of GQL by writing custom logic that can be executed directly on the server.

The core syntax for server-side programming includes:

- [Match compute](https://dev-docs.nebula-graph.io/v5.3.2/database-gql-reference/match-compute/): Enables complex pattern matching and iterative computations on graph data.
- [Variable manipulation](https://dev-docs.nebula-graph.io/v5.3.2/database-gql-reference/set/): Supports assignment and aggregation of different types of [variables](https://dev-docs.nebula-graph.io/v5.3.2/database-gql-reference/variable-definition/).
- [Control flow](https://dev-docs.nebula-graph.io/v5.3.2/database-gql-reference/control-flow/): Provides constructs for conditional execution and looping to control the flow of the program.
- [Logging](https://dev-docs.nebula-graph.io/v5.3.2/database-gql-reference/log/): Supports logging mechanisms to help with debugging and monitoring server-side programs.