dona ?t try to save bytes using char or short.
不要试图使用char或short 类型来保存字节。
for the types char and short, the compiler needs to reduce the size of the local variable to 8 or 16 bits after each assignment.
对于char和short类型,编译器在每次分配空间以后,都要将这种局部变量的尺寸减少到8位或16位。
we did it for silly purposes just to see how big each data type was, but on most systems the size of a char is what?
只是为了很傻的目的,来看看每个数据类型多大,但是在大多数的系统中char的大小是多少呢?
for example, if a function returns an unsigned char value but calculated a result of 256 or more (or -1 or less), errno would be set to erange and the function would return some irrelevant value.
例如,如果函数返回unsignedchar值,但计算的结果为256或更多(或者是-1或更少),则 errno将被设置为erange且函数会返回一些不相关的值。
this conversion improves performance when the char and the varchar types are present in one table.
当在同一张表中同时存在char和varchar类型时,这一转换会提高性能。
if you store strings in columns of type varchar or char in a db2 database, you often have the need to apply content-based predicates on those strings.
如果将字符串存储在db2数据库的varchar或char类型的列中,那么就常常需要在这些字符串上应用基于内容的谓词。
what we have so far is the send_message(int timeout, char *message, int length) function.
到目前为止,我们已经有了 send_message(inttimeout,char *message,intlength)函数。
first, the char type has a maximum length of 254 characters, whereas the varchar type can hold up to 32,672 characters.
首先,char类型的最大长度是254 个字符,而varchar类型最多可以容纳 32,672 个字符。
they are char *s because we now know what that means.
他们是char,*s,因为我们现在知道那是什么意思了。
he showed a remarkable picture of great towering maize plants in the plot with the char and miserable little runts in the plot without.
他给我们展示了一张图片:在生物炭的滋养下玉米高大强壮,而在缺少了生物炭的田地里玉米却小得可怜。
this means that if a char variable is defined, it will consume no more than a byte (8 bits).
这意味着,如果定义一个char变量,它占用的空间不会超过一字节(8位)。
whenever any request is sent from a db2 client to the db2 server, all character data (such as queries or char host variables) is converted from the client code page to the database code page.
每当从db2客户机发生任何请求到db2服务器,所有字符数据(例如查询或char主机变量)都要从客户机代码页转换为数据库代码页。
char stores single-byte or multibyte text strings of fixed length (up to 32,767 bytes); supports code-set order in collation of text data.
char存储固定长度的单字节或多字节的文本字符串(最高可达 32,767 个字节);在整理文本数据时支持使用代码集顺序。