Function duckdb_appender_destroy

pub unsafe extern "C" fn duckdb_appender_destroy(
    appender: *mut *mut _duckdb_appender,
) -> u32

Close the appender and destroy it. Flushing all intermediate state in the appender to the table, and de-allocating all memory associated with the appender.

appender: The appender to flush, close and destroy. returns: DuckDBSuccess on success or DuckDBError on failure.