Struct WasmScalarFunction 

pub struct WasmScalarFunction { /* private fields */ }

WASM scalar function that loads and executes a .wasm module.

Each WASM module must export:

• alloc(size: i32) -> i32 — allocate size bytes, return pointer
• dealloc(ptr: i32, size: i32) — free memory
• scalar(input_ptr: i32, input_len: i32) -> i32 — pointer to output (first 4 bytes at output pointer = output length as LE u32)

Input: the context’s columns marshalled as flat binary. Output: flat binary representing a single-column Columns, from which the first column’s ColumnData is extracted.

Implementations

impl WasmScalarFunction

pub fn new(name: impl Into<String>, wasm_bytes: Vec<u8>) -> Self

pub fn name(&self) -> &str

Trait Implementations

impl ScalarFunction for WasmScalarFunction

fn return_type(&self, _input_types: &[Type]) -> Type

fn scalar<'a>( &'a self, ctx: ScalarFunctionContext<'a>, ) -> ScalarFunctionResult<ColumnData>

impl Send for WasmScalarFunction

impl Sync for WasmScalarFunction