在 UltraLite 客户端上自动执行脚本

在 UltraLite 客户端上，除非已经设置了连接参数 dont_run_scripts，否则下次启动数据库时会自动运行未标记为 manual 的脚本。

如果提供了进度观察器回调函数，则在手动和自动执行期间均可提供脚本的执行进度，该函数定义如下：

typedef void(UL_CALLBACK_FN *ul_sql_passthrough_observer_fn)
    ( ul_sql_passthrough_status * status );

ul_sql_passthrough_status 结构定义如下：

typedef struct {
    ul_sql_passthrough_state    state; // current state
    ul_u_long  script_count; // total number of scripts to execute
    ul_u_long  cur_script; // current script being executed (1-based)
    ul_bool  stop;  // set to true to stop script execution
         // can only be set in the starting state
    ul_void *  user_data; // user data provided in register call
    SQLCA *  sqlca;
} ul_sql_passthrough_status;

进度观察器回调函数通过以下方法注册：

UL_FN_SPEC ul_ret_void UL_FN_MOD ULRegisterSQLPassthroughCallback(
SQLCA *                             sqlca,
ul_sql_passthrough_observer_fn      callback,
ul_void *                           user_data );