{
    global:
        qc_end;
        qc_get_affected_fields;
        qc_get_canonical;
        qc_get_created_table_name;
        qc_get_database_names;
        qc_get_operation;
        qc_get_qtype_str;
        qc_get_table_names;
        qc_get_type;
        qc_init;
        qc_is_drop_table_query;
        qc_is_real_query;
        qc_query_has_clause;
        qc_thread_end;
        qc_thread_init;
    local:
        *;
};