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.