Function final_table_drived

sqladvisor/main.cc:329–356

}

void final_table_drived() {
    if (options.verbose)
        sql_print_information("第%d步：开始选择驱动表,一共有%d个候选驱动表 \n", STEP_CNT++,
                TABLE_DRIVERD.size());
    int small_result_set = numeric_limits<int>::max();
    if (!TABLE_DRIVERD.empty()) {
        set<TABLE_LIST *>::iterator drived_it;
        for (drived_it = TABLE_DRIVERD.begin();
                drived_it != TABLE_DRIVERD.end(); drived_it++) {
            int result_set = get_join_table_result_set(*drived_it);
            if (options.verbose)
                sql_print_information("第%d步：候选驱动表%s的结果集行数为:%d \n", STEP_CNT++,
                        (*drived_it)->table_name, result_set);
            if (result_set < small_result_set) {
                DRIVED_TABLE = *drived_it;
                small_result_set = result_set;
            }
        }
	if (DRIVED_TABLE != NULL) {
	    DRIVED_TABLE->is_table_driverd = true;
	    if (options.verbose)
		sql_print_information("第%d步：选择表%s为驱动表 \n", STEP_CNT++,DRIVED_TABLE->table_name);
	} else {
	    sql_print_information("第%d步：侯选驱动表个数:%d,但无法确定驱动表 \n", STEP_CNT++,TABLE_DRIVERD.size());
	    exit(-1);
	}
    }	
}

void table_index_add_condition_field() {
    set<TABLE_LIST *> deployed_table_set;