Function build_leaf_predicate

bindings/c/src/table.rs:720–755

Helper to build a leaf predicate without a datum (IS NULL / IS NOT NULL).

(
    table: *const paimon_table,
    column: *const std::ffi::c_char,
    build_fn: impl FnOnce(&PredicateBuilder, &str) -> paimon::Result<Predicate>,
)

/// Helper to build a leaf predicate without a datum (IS NULL / IS NOT NULL).
unsafe fn build_leaf_predicate(
    table: *const paimon_table,
    column: *const std::ffi::c_char,
    build_fn: impl FnOnce(&PredicateBuilder, &str) -> paimon::Result<Predicate>,
) -> paimon_result_predicate {
    if let Err(e) = check_non_null(table, "table") {
        return paimon_result_predicate {
            predicate: std::ptr::null_mut(),
            error: e,
        };
    }
    let col_name = match validate_cstr(column, "column") {
        Ok(s) => s,
        Err(e) => {
            return paimon_result_predicate {
                predicate: std::ptr::null_mut(),
                error: e,
            }
        }
    };
    let table_ref = &*((*table).inner as *const Table);
    let pb = PredicateBuilder::new(table_ref.schema().fields());
    match build_fn(&pb, &col_name) {
        Ok(pred) => {
            let inner = Box::into_raw(Box::new(pred)) as *mut c_void;
            paimon_result_predicate {
                predicate: Box::into_raw(Box::new(paimon_predicate { inner })),
                error: std::ptr::null_mut(),
            }
        }
        Err(e) => paimon_result_predicate {
            predicate: std::ptr::null_mut(),
            error: paimon_error::from_paimon(e),
        },
    }
}

/// Create an equality predicate: `column = datum`.
///