Crate risingwave_expr_macro

Modules

• context 🔒
• gen 🔒
  Generate code for the functions.
• parse 🔒
  Parse the tokens of the macro.
• types 🔒
  This module provides utility functions for SQL data type conversion and manipulation.
• utils 🔒

Macros

• define_context
  Define the context variables which can be used by risingwave expressions.

Structs

• AggregateImpl 🔒
• FunctionAttr 🔒
• UserFunctionAttr 🔒
  Attributes from function signature fn(..)

Enums

• AggregateFnOrImpl 🔒
• ReturnTypeKind 🔒

Attribute Macros

• aggregate
• build_aggregate
• build_function
  Different from #[function], which implements the Expression trait for a rust scalar function, #[build_function] is used when you already implemented Expression manually.
• capture_context
  Capture the context from the local context to the function impl. TODO: The macro will be merged to #[function(.., capture_context(..))] later.
• function
  Defining the RisingWave SQL function from a Rust function.