Module bind_data 

Type-safe bind data management for table functions.

FfiBindData<T> stores user-defined data during the bind phase of a table function and provides safe retrieval in the init and scan phases.

DuckDB table function lifecycle

bind  → stores bind_data (T)
init  → reads bind_data to set up global state
local_init → reads bind_data to set up per-thread state (optional)
scan  → reads bind_data + init_data + local_init_data, fills output chunk

Example

use quack_rs::table::FfiBindData;
use libduckdb_sys::{duckdb_bind_info, duckdb_function_info};

struct MyConfig { path: String }

unsafe extern "C" fn my_bind(info: duckdb_bind_info) {
    // store bind data
    unsafe { FfiBindData::<MyConfig>::set(info, MyConfig { path: "data.csv".into() }); }
}

unsafe extern "C" fn my_scan(info: duckdb_function_info, _output: libduckdb_sys::duckdb_data_chunk) {
    // retrieve bind data in scan
    if let Some(cfg) = unsafe { FfiBindData::<MyConfig>::get_from_function(info) } {
        let _ = &cfg.path;
    }
}

Structs

FfiBindData

Type-safe bind data wrapper for DuckDB table functions.