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unsigned short current_length = 0;
const char * head= "INSERT INTO blobtest VALUES(6,";
const char * tail= ")";
char sql[128] = {0};//最终的sql语句
memcpy(sql, head, strlen(head));
current_length += strlen(head);
mysql_real_escape_string(handle, sql+current_length, (char *)&obj, sizeof(obj));
current_length += sizeof(obj);
memcpy(sql+current_length, tail, strlen(tail));
current_length += strlen(tail);
sql[current_length] = '\0';
mysql_real_query(handle, sql, current_length);
const char * head= "INSERT INTO blobtest VALUES(6,'";
const char * tail= "')";