This column gives an overview of the buffer overflow problem.
本专栏概述了缓冲区溢位问题。
Once all the lines have been processed, the buffer will have been completely updated and all the relevant assignment operators aligned to a suitable column.
当所有行处理完成之后，将完全更新缓存，并且所有相关的赋值操作符都对齐到一个合适的列。
Without file system caching, Q1 performs similarly on XML and CLOB columns, with a slight disadvantage (10%) for the CLOB column which is not buffered in the buffer pool.
在没有文件系统缓存的情况下，XML和clob列的Q1执行效果类似，不在缓冲池进行缓冲的clob列略微落后(10%)。
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