All data values are stored with the low byte first. This makes the data machine and operating system independent. The only requirements for binary portability are that the machine uses two's-complement signed integers and IEEE floating-point format. These requirements are widely used among mainstream machines. Binary compatibility might not be applicable to embedded systems, which sometimes have peculiar processors.
问题1:binary portability是什么意思,他跟先存低字节有什么关系呢?There is no significant speed penalty for storing data low byte first; the bytes in a table row normally are ]unaligned and it takes little more processing to read an unaligned byte in order than in reverse order. Also, the code in the server that fetches column values is not time critical compared to other code.
问题2:unaligned 是什么意思呢?
问题1:binary portability是什么意思,他跟先存低字节有什么关系呢?There is no significant speed penalty for storing data low byte first; the bytes in a table row normally are ]unaligned and it takes little more processing to read an unaligned byte in order than in reverse order. Also, the code in the server that fetches column values is not time critical compared to other code.
问题2:unaligned 是什么意思呢?
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