该函数以行posplus1的全局位置的bigint值为参数并进行转换，同时使父行的pos模式成为下一行的模式。
The function will take in the BIGINT value of the global position of the row posplus1 and translate this, given the pattern pos of the parent into the pattern for the next row.
这并不替换与模式匹配的文本——它只是在第一个包含该模式的行后面添加文本。
This doesn't replace the text matched by the pattern — it only adds the text after the first line that contains that pattern.
此命令仅仅输出输入中匹配的模式，而不会输出包含匹配的行。
This command only outputs the matched patterns from the input, not the lines of the input that contain a match.
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